Merge master into app attribution RFC

.agents/skills/dsh-code-review/SKILL.md

@@ -21,7 +21,7 @@ Independent judgment governs *what to look at* and *how to apply a rule to this
 
 These define the conventions and gates this repo is checked against, and they are authoritative. Read them at the source so this skill never drifts out of sync — and apply judgment in *interpreting* them for the case at hand, not in deciding whether they apply.
 
-- **[AGENTS.md](../../../AGENTS.md) § Conventions** — effect-based registrations, declaration-merging for events/ctx keys, waterfall `next()` discipline, discriminated-union match-don't-chain, explicit-over-implicit at seams, the empty-`catch` rule, symmetry.
+- **[AGENTS.md](../../../AGENTS.md) § Conventions** — effect-based registrations, declaration-merging for events/ctx keys, waterfall `next()` discipline, discriminated-union match-don't-chain, explicit-over-implicit at seams, no hardcoded tunables in plugins, the empty-`catch` rule, symmetry.
 - **[docs/defensive-patterns.md](../../../docs/defensive-patterns.md)** — each section is a bug class that bit us. Reviewing anything touching process lifecycle, async/await, disposal, or adapter error paths? Re-read this first — then look for the *adjacent* mistake it doesn't name.
 - **AGENTS.md § Type safety and documentation + [docs/AGENTS.md](../../../docs/AGENTS.md)** — the doc-sync rule (code change ⇒ update README + JSDoc in the SAME commit) and the writing rules (current-state-never-history, one line per paragraph, one home per fact, the word-budget gate).
 - **[packages/AGENTS.md](../../../packages/AGENTS.md)** — per-package conventions (file layout, the HMR-safety test requirement).
@@ -44,6 +44,7 @@ Where your independent reasoning earns its keep. Start here, then keep going acr
 - **e2e verifies the world, not the agent's self-report.** For real-API tests, confirm the assertion re-runs the command/checks the file externally — a keyword probe lets a cheating agent pass. For a behavior change to the agent's real flows, a no-key/mock test alone is usually insufficient: a with-key e2e (especially a smoke test that boots the real example and checks the world) is cheap here and catches "green units, broken product" — encourage it rather than treating real-API tests as expensive (see [docs/testing.md](../../../docs/testing.md)).
 - **Plugin export shape + real-loader coverage.** A new/changed `cordis.yml`-loaded plugin: is it a function/namespace plugin (`name`/`inject`/`Config`/`apply` named exports) with NO `export default`? A stray default export makes the Loader's `unwrapExports` drop `inject` and the plugin crashes at load with `cannot get property … without inject` — invisible to hand-built `ctx.plugin({...})` tests and to line coverage. Confirm there's a test driving it through the REAL loader path (the no-key subprocess e2e for ACP is the model). And any opportunistic read of a service NOT in `static inject` should use `ctx.get(name)`, not `ctx.<name>` (the property proxy throws through a foreign shadow). See [packages/AGENTS.md](../../../packages/AGENTS.md) and [docs/postmortem/0001](../../../docs/postmortem/0001-acp-default-export-drops-inject.md).
 - **Seam discipline.** New swappable capability? Check it's split per the capability-seams RFC (interface / impl / consumer), and that the consumer injects the interface key, never an implementation type.
+- **Hardcoded tunables that should be plugin config.** A literal timeout, grace period, output/truncation cap, result-count limit, retry count, buffer size, model name, API base URL, user agent, or filesystem path introduced inside a plugin belongs on the plugin's schemastery `Config` with the shipped value as its default (AGENTS.md § Conventions "No hardcoded tunables in plugins"). A named `DEFAULT_*` constant or a test-only injection seam is not configurability — the question to ask is whether a `cordis.yml` deployment can change the value without a code edit. Protocol/wire constants, semantic constants, values pinned by an external spec, and security invariants are exempt; a new `Config` field also needs its README row and range validation. No gate detects a hardcoded tunable — this check is entirely on the reviewer.
 - **Test quality — sufficiency, not just coverage.** 100% per-file coverage and a green suite are necessary, not sufficient: they prove the lines *ran*, not that the feature *works the way it ships*. Judge whether the tests are sufficient on two axes. (1) **Would they fail if the behavior regressed?** A test that passes but asserts the wrong thing — or restates the implementation instead of the contract (events fired, disposal reached, the world changed) — is worse than none. (2) **Do they exercise the REAL thing, the way it's actually used?** Prefer the genuine collaborator over a fake, drive the change through its real entry path (the cordis Loader, the ACP bridge, a booted subprocess — not a hand-built `ctx.plugin({...})` that bypasses `unwrapExports`), and verify the WORLD (re-read the file/log/registry externally), not the agent's self-report. A test that fakes the inputs just enough to cover every line will agree with whatever the author assumed; the real thing won't. When a test sets up a *clean/happy* path to reach a line, ask whether the line's PURPOSE is exercised — e.g. a durability/teardown path "tested" by a fully-completed turn never proves the mid-flight teardown it exists for; a torn-tail recovery branch covered by a well-formed log never proves recovery. Flag tests that hit the line but not the scenario. See [docs/testing.md](../../../docs/testing.md) § "Test the real entry path" and § "Prefer the real implementation over a mock".
 - **Snapshot coverage for transcript/UX changes.** If the PR changes the editor-facing transcript or end-to-end agent UX — the ACP bridge's event→update translation, the agent loop's observable output, tool presentation, or anything an editor renders — it must add or update a snapshot scenario (`examples/*/tests/**/*.snapshot.ts`, goldens under `examples/acp-agent/tests/snapshots/`) or note explicitly why none applies (AGENTS.md § Conventions). Review the golden diff itself: a changed `stdout.golden.txt` / `session.golden.txt` is a behavior change in disguise — confirm it's intended, not an accidental regression someone re-recorded away. A pure internal refactor with no observable-output change is exempt, but the PR should say so. See [docs/rfc/implemented/testing/2026-06-19-acp-snapshot-tests.md](../../../docs/rfc/implemented/testing/2026-06-19-acp-snapshot-tests.md).
 - **Bilingual docs: review translation quality, not just pairing.** If the PR adds or edits a doc pair, read the changed English and Chinese sides and compare the meaning, not only the mechanical diff. Verify terms against [terminology.md](../../../docs/i18n/terminology.md), including first-occurrence annotations and "do not translate as" prohibitions; if a new term has no established precedent, the PR should keep it in English, list it under `待定术语`, and update the terminology table once the rendering is decided. A green `verify-translation-pairing` only proves hashes, switchers, and structure were recorded — it does not prove the translation is faithful, natural, or correctly termed. Treat [translation-rules.md](../../../docs/i18n/translation-rules.md) MUST/MUST NOT violations as blocking.

AGENTS.md

@@ -21,8 +21,8 @@ packages/    Harness packages at packages/<group>/<pkg>/, all named @deepseek-ai
   todo/        the todo_write tool
   hooks/       Claude Code / Codex hook bridges + shared wire-protocol library
   session-persistence/  persistence seam + JSONL/SQLite backends
-  ui/          ACP bridge + the stdio/ACP app packages (each with a bin)
-  support/     dev/test infrastructure: invariants, ui-stdio, llm-replay, subagent-mock
+  ui/          ACP bridge + app-boot glue + the stdio/ACP app bins
+  support/     dev/test infrastructure: invariants, llm-replay, subagent-mock
   util/        zero-dependency utilities (Branded<B>)
 examples/    Runnable demos: thin cordis.yml leaves over the app packages (see examples/AGENTS.md)
 docs/        architecture, generated catalogs, RFCs, postmortems, cookbook (see docs/AGENTS.md)
@@ -83,12 +83,13 @@ Real-API tests and demos read `DEEPSEEK_API_KEY` (and optional `DEEPSEEK_BASE_UR
 - Every npm package is `@deepseek-ai/dsh-<name>`; vendored packages keep upstream names and are `private: true`. `cordis` is a peerDependency (+ dev) of every harness package.
 - ESM everywhere (`"type": "module"`). Cross-package imports use package names, never relative paths; in-package relative imports use explicit `.ts` extensions. Dev/test/demo run unbuilt via tsx + the root tsconfig `paths` map; building is only for consumers outside the repo.
 - **Registrations are effects**: every contribution goes through `ctx.effect()` / `ctx.on()`; a registry's `register()` returns the disposer.
-- **Typed events via declaration merging**; extensible unions use the merge-extensible-map pattern (`ContentBlockMap`, `SessionEventMap`, …). Every new event's JSDoc carries an `@mode` tag — the catalog generator hard-errors without it; mode semantics are in the [generated catalog](docs/cordis-catalog/events-and-services.md) header and [the catalog RFC](docs/rfc/implemented/process/2026-06-20-generated-cordis-catalog.md).
+- **Typed events via declaration merging**; extensible unions use the merge-extensible-map pattern (`ContentBlockMap`, `SessionEventMap`, …). Every new event's JSDoc carries an `@mode` tag and a `@param` per payload parameter (`this`/trailing `next` exempt); every public service-class method documents each parameter and non-void return (`@param`/`@returns`) — the catalog generator hard-errors otherwise ([completeness RFC](docs/rfc/implemented/process/2026-07-04-cordis-jsdoc-completeness-gate.md)); mode semantics are in the [generated catalog](docs/cordis-catalog/events-and-services.md) header and [the catalog RFC](docs/rfc/implemented/process/2026-06-20-generated-cordis-catalog.md).
 - **Discriminated unions: `switch` on the tag**, not if-chains. Closed unions end with `default: assertNever(...)`; merge-extensible unions must NOT — handle known cases and fall through `default` with a comment.
 - **Waterfall listeners MUST call `next()`** to delegate; returning without it is the veto ([semantics](docs/architecture.md#cordis-waterfall-semantics-important)).
 - **Plugins, not loop changes**: new behavior goes on the documented extension seams; changing `agent-loop` requires updating docs/architecture.md.
 - **Capability seams are three packages** — interface / implementation / consumer ([capability seams](docs/rfc/implemented/architecture/2026-06-13-capability-seams.md)); don't split preemptively.
 - **Explicit > implicit at package seams**: no optional field silently filled by a hidden `?? default` inside `run()`; defaulting is an explicit `resolve(request): Spec` step in the owning implementation (the `dsh-bash` request/spec split is the template).
+- **No hardcoded tunables in plugins**: anything two deployments could want different — timeouts, caps, grace periods, model names, base URLs — is a defaulted, validated `Config` field, not a literal; a `DEFAULT_*` constant or test-only seam is not configurability. The test: changeable from `cordis.yml`, no code edit. Protocol/wire constants, external-spec values, security invariants stay hardcoded.
 - **Opaque cross-boundary ids are branded** (`Branded<B>` from `dsh-brand`), never bare `string` ([branded IDs](docs/rfc/implemented/architecture/2026-06-20-branded-ids.md)).
 - **An empty `catch` names what it swallows** and why nothing else can reach it; keep the `try` to one statement.
 - **Symmetry is usually more correct**: parallel values get parallel form; asymmetry is a smell for a missed extraction.

docs/architecture.md

@@ -59,7 +59,7 @@ Two seams bend the template deliberately:
 
 ## The vocabulary (dsh-llm)
 
-Messages are arrays of typed **content blocks** (`text`, `reasoning`, `tool-call`, `tool-result`, `image`); the union derives from the merge-extensible `ContentBlockMap`; the same pattern types `MessageSource`, `FinishReason`, `TurnTrigger`, `TurnEndReason`. Streaming is a raw chunk protocol (`block-start` … `finish`) with `BlockAssembler` as the single shared chunk→block assembler; the loop logs raw chunks (replay fidelity) while assembling them. `LlmAdapter` is the provider seam: subclass, implement `stream()`, register via `ctx.llm.registerAdapter(models, adapter)`; `dsh-llm-deepseek` and `dsh-llm-pi-ai` implement the one contract as deliberate design twins ([twin RFC](rfc/implemented/architecture/2026-06-13-twin-llm-adapters.md)). The StreamChunk conventions (usage/finish ordering, raw-string tool arguments, the two sanctioned error paths) are pinned in `dsh-llm/src/types.ts` and [llm-streaming.md](core-data-structures/llm-streaming.md).
+Messages are arrays of typed **content blocks** (`text`, `reasoning`, `tool-call`, `tool-result`); the union derives from the merge-extensible `ContentBlockMap`; the same pattern types `MessageSource`, `FinishReason`, `TurnTrigger`, `TurnEndReason`. The core set is limited to blocks every shipping path honors — multimodal content (images, audio, …) has no core block type; a feature that needs one adds it via the map in the same coordinated change that maps it in the adapters, surfaces it in the UI bridges, and prices it in compaction ([the drop-image RFC](rfc/implemented/simplification/2026-07-04-drop-image-content-block.md)). Streaming is a raw chunk protocol (`block-start` … `finish`) with `BlockAssembler` as the single shared chunk→block assembler; the loop logs raw chunks (replay fidelity) while assembling them. `LlmAdapter` is the provider seam: subclass, implement `stream()`, register via `ctx.llm.registerAdapter(models, adapter)`; `dsh-llm-deepseek` and `dsh-llm-pi-ai` implement the one contract as deliberate design twins ([twin RFC](rfc/implemented/architecture/2026-06-13-twin-llm-adapters.md)). The StreamChunk conventions (usage/finish ordering, raw-string tool arguments, the two sanctioned error paths) are pinned in `dsh-llm/src/types.ts` and [llm-streaming.md](core-data-structures/llm-streaming.md).
 
 ## Event-sourced sessions (dsh-session)
 
@@ -118,7 +118,7 @@ forever:
         session('tool/result')
       append buffered post-execute additionalContext → session('context/message')(s)
                                                          ⟵ after ALL tool/results (adjacency)
-      drain steering → session('steering/message'); emit agent/steering
+      drain steering → session('steering/message')
       session('step/end')                             ⟵ durable step boundary (no agent/* mirror)
       cont = waterfall agent/turn-continuation(default = {action: hadToolCalls||steered
         ? 'continue' : 'stop'}) → ContinuationDecision

docs/cookbook/adding-an-llm-adapter.md

@@ -27,7 +27,7 @@ Registration is effect-based (HMR-safe); one adapter per model name — duplicat
 - Allocate block `index`es in first-seen stream order; reuse the index for every delta of the same block.
 - Errors have exactly two sanctioned paths: THROW from `stream()` (transport and protocol failures — use `LlmError` with a stable code), or end the stream with `finish {kind: 'error' | 'aborted'}` (provider in-band failures). Consumers handle both; pick per failure class and document it.
 - Honor `options.signal` (pass it to fetch / your SDK).
-- `prefill` and other unsupported `GenerateOptions` fields: throw `LlmError(..., 'UNSUPPORTED')` rather than silently dropping.
+- A `GenerateOptions` field your provider cannot honor (e.g. a `stop` list on a provider without stop sequences): throw `LlmError(..., 'UNSUPPORTED')` rather than silently dropping it.
 
 Provider-specific request knobs (thinking modes, effort levels) belong in the ADAPTER's Config, not in `GenerateOptions` — the core vocabulary stays provider-neutral.
 

docs/cordis-catalog/events-and-services.md

@@ -25,7 +25,7 @@ An agent was registered in the AgentRegistry and is ready to receive messages.
 
 Types: [Agent](../core-data-structures/core.md)
 
-Source: [`packages/core/agent/src/types.ts:233`](../../packages/core/agent/src/types.ts)
+Source: [`packages/core/agent/src/types.ts:234`](../../packages/core/agent/src/types.ts)
 
 #### `agent/disposed` — emit
 
@@ -37,7 +37,7 @@ An agent was disposed and removed from the registry; its fiber and any in-flight
 
 Types: [Agent](../core-data-structures/core.md)
 
-Source: [`packages/core/agent/src/types.ts:239`](../../packages/core/agent/src/types.ts)
+Source: [`packages/core/agent/src/types.ts:241`](../../packages/core/agent/src/types.ts)
 
 #### `agent/error` — emit
 
@@ -49,7 +49,7 @@ A step or turn errored. The loop reports a failure here (plus the logger) even w
 
 Types: [Agent](../core-data-structures/core.md)
 
-Source: [`packages/core/agent/src/types.ts:353`](../../packages/core/agent/src/types.ts)
+Source: [`packages/core/agent/src/types.ts:380`](../../packages/core/agent/src/types.ts)
 
 #### `agent/pre-step` — serial
 
@@ -63,7 +63,7 @@ Serial (awaited in registration order), not a waterfall: a listener mutates the
 
 Types: [Agent](../core-data-structures/core.md)
 
-Source: [`packages/core/agent/src/types.ts:305`](../../packages/core/agent/src/types.ts)
+Source: [`packages/core/agent/src/types.ts:319`](../../packages/core/agent/src/types.ts)
 
 #### `agent/prompt-submit` — waterfall
 
@@ -75,7 +75,7 @@ Waterfall: decide what happens to ONE drained queued message before it becomes a
 
 Types: [Agent](../core-data-structures/core.md) · [ContentBlock](../core-data-structures/core.md) · [MessageSource](../core-data-structures/core.md)
 
-Source: [`packages/core/agent/src/types.ts:315`](../../packages/core/agent/src/types.ts)
+Source: [`packages/core/agent/src/types.ts:332`](../../packages/core/agent/src/types.ts)
 
 #### `agent/queued` — emit
 
@@ -87,7 +87,7 @@ A message entered the agent's inbox (queued or steering). `source` is the resolv
 
 Types: [Agent](../core-data-structures/core.md) · [ContentBlock](../core-data-structures/core.md) · [MessageSource](../core-data-structures/core.md)
 
-Source: [`packages/core/agent/src/types.ts:252`](../../packages/core/agent/src/types.ts)
+Source: [`packages/core/agent/src/types.ts:259`](../../packages/core/agent/src/types.ts)
 
 #### `agent/request` — waterfall
 
@@ -99,7 +99,7 @@ Waterfall: mutate the fully-assembled GenerateOptions before the model call (hoo
 
 Types: [Agent](../core-data-structures/core.md) · [GenerateOptions](../core-data-structures/core.md)
 
-Source: [`packages/core/agent/src/types.ts:324`](../../packages/core/agent/src/types.ts)
+Source: [`packages/core/agent/src/types.ts:345`](../../packages/core/agent/src/types.ts)
 
 #### `agent/session-start` — emit
 
@@ -111,7 +111,7 @@ The agent's session lifecycle began, fired once before its first turn. `source`
 
 Types: [Agent](../core-data-structures/core.md)
 
-Source: [`packages/core/agent/src/types.ts:265`](../../packages/core/agent/src/types.ts)
+Source: [`packages/core/agent/src/types.ts:274`](../../packages/core/agent/src/types.ts)
 
 #### `agent/status` — emit
 
@@ -123,19 +123,7 @@ Agent status changed (`idle` ⇄ `running`, or → `disposed`). Drive lifecycle
 
 Types: [Agent](../core-data-structures/core.md)
 
-Source: [`packages/core/agent/src/types.ts:246`](../../packages/core/agent/src/types.ts)
-
-#### `agent/steering` — emit
-
-Steering content was injected into a running turn.
-
-```ts cordis-catalog
-'agent/steering'(agent: Agent, turn: number, content: ContentBlock[], source: MessageSource): void
-```
-
-Types: [Agent](../core-data-structures/core.md) · [ContentBlock](../core-data-structures/core.md) · [MessageSource](../core-data-structures/core.md)
-
-Source: [`packages/core/agent/src/types.ts:347`](../../packages/core/agent/src/types.ts)
+Source: [`packages/core/agent/src/types.ts:250`](../../packages/core/agent/src/types.ts)
 
 #### `agent/step-result` — waterfall
 
@@ -147,7 +135,7 @@ Waterfall: post-process the assembled assistant Message before tool dispatch (va
 
 Types: [Agent](../core-data-structures/core.md) · [Message](../core-data-structures/core.md)
 
-Source: [`packages/core/agent/src/types.ts:330`](../../packages/core/agent/src/types.ts)
+Source: [`packages/core/agent/src/types.ts:355`](../../packages/core/agent/src/types.ts)
 
 #### `agent/turn-continuation` — waterfall
 
@@ -159,7 +147,7 @@ Waterfall: override the turn-continuation decision via a typed ContinuationDecis
 
 Types: [Agent](../core-data-structures/core.md)
 
-Source: [`packages/core/agent/src/types.ts:340`](../../packages/core/agent/src/types.ts)
+Source: [`packages/core/agent/src/types.ts:368`](../../packages/core/agent/src/types.ts)
 
 ### `fs/*`
 
@@ -173,7 +161,7 @@ Single-slot decision: produce the optional version guard for the next FileSystem
 
 Types: [FsTarget](../core-data-structures/filesystem.md) · [FsVersion](../core-data-structures/filesystem.md)
 
-Source: [`packages/fs/fs/src/index.ts:119`](../../packages/fs/fs/src/index.ts)
+Source: [`packages/fs/fs/src/index.ts:123`](../../packages/fs/fs/src/index.ts)
 
 #### `fs/observed` — emit
 
@@ -185,7 +173,7 @@ Record that an actor observed a target at a version, after a successful read/wri
 
 Types: [FsTarget](../core-data-structures/filesystem.md) · [FsVersion](../core-data-structures/filesystem.md)
 
-Source: [`packages/fs/fs/src/index.ts:131`](../../packages/fs/fs/src/index.ts)
+Source: [`packages/fs/fs/src/index.ts:138`](../../packages/fs/fs/src/index.ts)
 
 #### `fs/write-intent` — waterfall
 
@@ -197,7 +185,7 @@ Single-slot decision: produce the write intent for the next FileSystem.writeText
 
 Types: [FsTarget](../core-data-structures/filesystem.md) · [FsWriteIntent](../core-data-structures/filesystem.md)
 
-Source: [`packages/fs/fs/src/index.ts:107`](../../packages/fs/fs/src/index.ts)
+Source: [`packages/fs/fs/src/index.ts:109`](../../packages/fs/fs/src/index.ts)
 
 ### `llm/*`
 
@@ -211,7 +199,7 @@ Waterfall around every streaming model call (retry, caching, routing). Bound to
 
 Types: [GenerateOptions](../core-data-structures/core.md) · [StreamChunk](../core-data-structures/llm-streaming.md)
 
-Source: [`packages/llm/llm/src/index.ts:32`](../../packages/llm/llm/src/index.ts)
+Source: [`packages/llm/llm/src/index.ts:33`](../../packages/llm/llm/src/index.ts)
 
 ### `session/*`
 
@@ -223,7 +211,7 @@ A session was created in the store.
 'session/created'(session: Session): void
 ```
 
-Source: [`packages/core/session/src/index.ts:35`](../../packages/core/session/src/index.ts)
+Source: [`packages/core/session/src/index.ts:36`](../../packages/core/session/src/index.ts)
 
 #### `session/event` — emit
 
@@ -235,7 +223,7 @@ An event was appended to a session log (sync, fire-and-forget). This is the per-
 
 Types: [SessionEvent](../core-data-structures/core.md)
 
-Source: [`packages/core/session/src/index.ts:41`](../../packages/core/session/src/index.ts)
+Source: [`packages/core/session/src/index.ts:44`](../../packages/core/session/src/index.ts)
 
 #### `session/flush` — parallel
 
@@ -245,7 +233,7 @@ Awaited durability checkpoint. The agent loop awaits `ctx.parallel('session/flus
 'session/flush'(session: Session): Promise<void> | void
 ```
 
-Source: [`packages/core/session/src/index.ts:50`](../../packages/core/session/src/index.ts)
+Source: [`packages/core/session/src/index.ts:54`](../../packages/core/session/src/index.ts)
 
 ### `subagent/*`
 
@@ -257,7 +245,7 @@ A subagent run settled — emitted when SubagentRun.result resolves (any stop re
 'subagent/end'(info: SubagentRunEndInfo): void
 ```
 
-Source: [`packages/subagent/subagent/src/index.ts:75`](../../packages/subagent/subagent/src/index.ts)
+Source: [`packages/subagent/subagent/src/index.ts:77`](../../packages/subagent/subagent/src/index.ts)
 
 #### `subagent/start` — emit
 
@@ -267,7 +255,7 @@ A subagent run started — emitted after the provider is resolved and its capabi
 'subagent/start'(info: SubagentRunInfo): void
 ```
 
-Source: [`packages/subagent/subagent/src/index.ts:69`](../../packages/subagent/subagent/src/index.ts)
+Source: [`packages/subagent/subagent/src/index.ts:70`](../../packages/subagent/subagent/src/index.ts)
 
 ### `system-prompt/*`
 
@@ -279,7 +267,7 @@ Waterfall around prompt assembly — mutate or extend the PromptAssembly (sectio
 'system-prompt/assemble'(this: SystemPrompt, assembly: PromptAssembly, next: () => Promise<PromptAssembly>): Promise<PromptAssembly>
 ```
 
-Source: [`packages/core/system-prompt/src/index.ts:24`](../../packages/core/system-prompt/src/index.ts)
+Source: [`packages/core/system-prompt/src/index.ts:26`](../../packages/core/system-prompt/src/index.ts)
 
 #### `system-prompt/change` — emit
 
@@ -289,7 +277,7 @@ A section or tool provider was registered or unregistered (the assembly inputs c
 'system-prompt/change'(): void
 ```
 
-Source: [`packages/core/system-prompt/src/index.ts:30`](../../packages/core/system-prompt/src/index.ts)
+Source: [`packages/core/system-prompt/src/index.ts:32`](../../packages/core/system-prompt/src/index.ts)
 
 ### `tools/*`
 
@@ -301,7 +289,7 @@ A tool was registered or unregistered (the available tool set changed).
 'tools/change'(): void
 ```
 
-Source: [`packages/core/tools/src/index.ts:84`](../../packages/core/tools/src/index.ts)
+Source: [`packages/core/tools/src/index.ts:87`](../../packages/core/tools/src/index.ts)
 
 #### `tools/post-execute` — waterfall
 
@@ -313,7 +301,7 @@ Waterfall AFTER a tool runs — where hook plugins inspect the result and accept
 
 Types: [ToolExecution](../core-data-structures/tools.md) · [ToolExecutionResult](../core-data-structures/tools.md)
 
-Source: [`packages/core/tools/src/index.ts:79`](../../packages/core/tools/src/index.ts)
+Source: [`packages/core/tools/src/index.ts:82`](../../packages/core/tools/src/index.ts)
 
 #### `tools/pre-execute` — waterfall
 
@@ -325,19 +313,7 @@ Waterfall BEFORE a tool runs — the gate where sandbox, permission, and hook pl
 
 Types: [ToolExecution](../core-data-structures/tools.md)
 
-Source: [`packages/core/tools/src/index.ts:65`](../../packages/core/tools/src/index.ts)
-
-### `web/*`
-
-#### `web/providers-change` — emit
-
-Fired after the provider registry changes — a search or fetch provider was registered or disposed. Carries no payload and no capability graph: it means only "the provider registry changed; observers may recompute status from `ctx.web`". `searchStatus()` / `fetchStatus()` stay derived, not stored.
-
-```ts cordis-catalog
-'web/providers-change'(this: WebService): void
-```
-
-Source: [`packages/web/web/src/index.ts:65`](../../packages/web/web/src/index.ts)
+Source: [`packages/core/tools/src/index.ts:66`](../../packages/core/tools/src/index.ts)
 
 ## Services
 
@@ -444,7 +420,7 @@ abstract editText(target: FsTarget, edit: FsEditRequest, expected?: { version: F
 
 Types: [FsEditOutcome](../core-data-structures/filesystem.md) · [FsEditRequest](../core-data-structures/filesystem.md) · [FsInfo](../core-data-structures/filesystem.md) · [FsTarget](../core-data-structures/filesystem.md) · [FsVersion](../core-data-structures/filesystem.md) · [FsWriteIntent](../core-data-structures/filesystem.md) · [FsWriteOutcome](../core-data-structures/filesystem.md)
 
-Source: [`packages/fs/fs/src/index.ts:165`](../../packages/fs/fs/src/index.ts)
+Source: [`packages/fs/fs/src/index.ts:172`](../../packages/fs/fs/src/index.ts)
 
 ### `ctx.llm` — `LlmService`
 
@@ -458,7 +434,7 @@ stream(options: GenerateOptions): AsyncIterable<StreamChunk>
 
 Types: [GenerateOptions](../core-data-structures/core.md) · [StreamChunk](../core-data-structures/llm-streaming.md)
 
-Source: [`packages/llm/llm/src/index.ts:77`](../../packages/llm/llm/src/index.ts)
+Source: [`packages/llm/llm/src/index.ts:78`](../../packages/llm/llm/src/index.ts)
 
 ### `ctx.sessionPersistence` — `SessionPersistence` (abstract seam)
 
@@ -497,7 +473,7 @@ get(id: SessionId): Session | undefined
 list(): Session[]
 ```
 
-Source: [`packages/core/session/src/index.ts:323`](../../packages/core/session/src/index.ts)
+Source: [`packages/core/session/src/index.ts:327`](../../packages/core/session/src/index.ts)
 
 ### `ctx.subagents` — `SubagentService`
 
@@ -510,7 +486,7 @@ list(): string[]
 start(name: string, request: SubagentStartRequest): SubagentRun
 ```
 
-Source: [`packages/subagent/subagent/src/index.ts:121`](../../packages/subagent/subagent/src/index.ts)
+Source: [`packages/subagent/subagent/src/index.ts:123`](../../packages/subagent/subagent/src/index.ts)
 
 ### `ctx.systemPrompt` — `SystemPrompt`
 
@@ -522,7 +498,7 @@ tools(provider: () => ToolSchema[]): () => void
 assemble(): Promise<PromptAssembly>
 ```
 
-Source: [`packages/core/system-prompt/src/index.ts:71`](../../packages/core/system-prompt/src/index.ts)
+Source: [`packages/core/system-prompt/src/index.ts:73`](../../packages/core/system-prompt/src/index.ts)
 
 ### `ctx.tools` — `ToolRegistry`
 
@@ -537,31 +513,29 @@ async execute(exec: ToolExecution): Promise<ToolExecutionResult>
 
 Types: [ToolDefinition](../core-data-structures/tools.md) · [ToolExecution](../core-data-structures/tools.md) · [ToolExecutionResult](../core-data-structures/tools.md)
 
-Source: [`packages/core/tools/src/index.ts:265`](../../packages/core/tools/src/index.ts)
+Source: [`packages/core/tools/src/index.ts:268`](../../packages/core/tools/src/index.ts)
 
 ### `ctx.web` — `WebService`
 
 The web access service. Registered as `ctx.web` (one instance per context).
 
-Selection semantics (identical for status and execution, never order- dependent):
+Selection semantics (resolved at execution time, never order-dependent):
 
 - A configured id that is registered and `status().available` → that provider.
-- A configured id not registered → `configured-missing` / `WEB_PROVIDER_CONFIGURED_MISSING`.
-- A configured id registered but unavailable → `configured-unavailable` / `WEB_PROVIDER_CONFIGURED_UNAVAILABLE`.
+- A configured id not registered → `WEB_PROVIDER_CONFIGURED_MISSING`.
+- A configured id registered but unavailable → `WEB_PROVIDER_CONFIGURED_UNAVAILABLE`.
 - No id configured, exactly one registered usable provider → that provider.
-- No id configured, multiple usable providers → `ambiguous` / `WEB_PROVIDER_AMBIGUOUS`.
-- No id configured, no usable provider → `none` / `WEB_PROVIDER_UNAVAILABLE`.
+- No id configured, multiple usable providers → `WEB_PROVIDER_AMBIGUOUS`.
+- No id configured, no usable provider → `WEB_PROVIDER_UNAVAILABLE`.
 
 ```ts cordis-catalog
 registerSearchProvider(provider: WebSearchProvider): () => void
 registerFetchProvider(provider: WebFetchProvider): () => void
-searchStatus(): WebCapabilityStatus
-fetchStatus(): WebCapabilityStatus
 async search(request: WebSearchRequest, exec?: WebExecContext): Promise<WebSearchResult>
 async fetch(request: WebFetchRequest, exec?: WebExecContext): Promise<WebFetchResult>
 ```
 
-Source: [`packages/web/web/src/index.ts:105`](../../packages/web/web/src/index.ts)
+Source: [`packages/web/web/src/index.ts:87`](../../packages/web/web/src/index.ts)
 
 ## Inherited tier (cordis core + loader/hmr/timer)
 

docs/core-data-structures/core.md

@@ -87,11 +87,10 @@ interface ContentBlockMap {
   'reasoning': ReasoningBlock
   'tool-call': ToolCallBlock
   'tool-result': ToolResultBlock
-  'image': ImageBlock
 }
 ```
 
-The block interfaces (full fields in source): `TextBlock` (`text`), `ReasoningBlock` (thinking, distinct from visible text), `ToolCallBlock` (`id: CallId`, `name`, raw-JSON `arguments`), `ToolResultBlock` (`toolCallId`, nested `content: ContentBlock[]`, `isError?`), `ImageBlock` (`url`, `mimeType?`). `ContentBlock = ContentBlockMap[ContentBlockType]`.
+The block interfaces (full fields in source): `TextBlock` (`text`), `ReasoningBlock` (thinking, distinct from visible text), `ToolCallBlock` (`id: CallId`, `name`, raw-JSON `arguments`), `ToolResultBlock` (`toolCallId`, nested `content: ContentBlock[]`, `isError?`). `ContentBlock = ContentBlockMap[ContentBlockType]`. The core set is limited to blocks every shipping path honors — multimodal content (images, audio, …) has no core block type; a feature that needs one adds it via the merge-extensible map together with the adapter/UI/compaction support that honors it.
 
 A `Message` is a role plus blocks:
 
@@ -108,7 +107,6 @@ Where a message came from is itself a merge-extensible sum type:
 interface MessageSourceMap {
   user: { kind: 'user' }
   plugin: { kind: 'plugin'; plugin: string }
-  agent: { kind: 'agent'; agentId: string }
 }
 ```
 
@@ -132,8 +130,6 @@ interface GenerateOptions {
   system?: string
   /** Tool schemas (adapters map to the provider's `tools` field). */
   tools?: ToolSchema[]
-  /** Assistant prefix continuation (prefill). */
-  prefill?: ContentBlock[]
   temperature?: number
   maxTokens?: number
   /**
@@ -182,7 +178,6 @@ interface ToolSchema {
   description: string
   /** JSON Schema object for the arguments. */
   parameters: Record<string, unknown>
-  strict?: boolean
 }
 ```
 

docs/core-data-structures/filesystem.md

@@ -12,7 +12,6 @@ Every operation resolves a user-supplied path to an opaque backend target first.
 
 ```ts type-equiv
 interface FsTarget {
-  inputPath: string
   targetKey: FsTargetKey
   displayPath: string
 }
@@ -81,8 +80,6 @@ interface FsEditRequest {
 
 ```ts type-equiv
 interface FsEditOutcome {
-  replacements: number
-  replaceAll: boolean
   version: FsVersion
   before: string
   after: string
@@ -109,16 +106,14 @@ interface FsPolicyExec {
 
 ## Read outcome (consumer / read rendering)
 
-A text read is bounded by line window, byte cap, and backend limits. The outcome the model-facing `read` tool renders carries the file's version at read time; there is no `full`/`partial` view — authorization is freshness-based, so any windowed read can authorize a later write/edit when the file is unchanged. Read windowing and this outcome shape live in `dsh-tool-fs` (the executor that owns the read), not in the policy plugin.
+A text read is bounded by line window, byte cap, and backend limits. The outcome the model-facing `read` tool renders is purely presentational; there is no `full`/`partial` view — authorization is freshness-based (the tool emits `fs/observed` with the stat's version directly), so any windowed read can authorize a later write/edit when the file is unchanged. Read windowing and this outcome shape live in `dsh-tool-fs` (the executor that owns the read), not in the policy plugin.
 
 ```ts type-equiv
 interface FileReadOutcome {
   offset: number
-  limit: number
   lines: FileTextLine[]
   totalLines: number
   truncatedByBytes?: true
-  version: FsVersion
 }
 ```
 

docs/core-data-structures/llm-streaming.md

@@ -72,7 +72,6 @@ interface ContentBlockMap {
   'reasoning': ReasoningBlock
   'tool-call': ToolCallBlock
   'tool-result': ToolResultBlock
-  'image': ImageBlock
 }
 ```
 

docs/core-data-structures/session.md

@@ -164,7 +164,6 @@ Everything else (`turn/*`, `step/*`) is structural and does not project into a m
 ```ts type-equiv
 interface TurnTriggerMap {
   message: { kind: 'message'; source: MessageSource }
-  continuation: { kind: 'continuation' }
   /**
    * An out-of-band context injection (`agent.inject()`) made while the agent
    * was idle. The loop wraps the injected `context/message` in a one-shot turn

docs/core-data-structures/web.md

@@ -10,7 +10,7 @@ Search and fetch share no request schema and no business logic, but they are del
 
 ## Search request and result
 
-The model-facing tool argument is just a `query`; `maxResults` is a consumer-owned bound (`dsh-tool-web`'s `WEB_SEARCH_MAX_RESULTS`, default `8`) passed through the seam and enforced on the way back — if a provider over-returns, the seam truncates `sources[]` and sets `truncated`.
+The model-facing tool argument is just a `query`; `maxResults` is a consumer-owned bound (`dsh-tool-web`'s `searchMaxResults` config, default `8`) passed through the seam and enforced on the way back — if a provider over-returns, the seam truncates `sources[]` and sets `truncated`.
 
 ```ts type-equiv
 interface WebSearchRequest {
@@ -73,9 +73,9 @@ type WebFetchBody =
   | { readonly kind: 'text'; readonly content: string }
 ```
 
-## Provider and capability status
+## Provider status
 
-A provider's `status()` is a cheap LOCAL check (credential presence, parseable config) and **must not make network calls**. It is an input to selection, not a health system.
+A provider's `status()` is a cheap LOCAL check (credential presence, parseable config) and **must not make network calls**. It is an input to execution-time selection, not a health system: `search()`/`fetch()` read it to pick a usable provider, and a selection failure surfaces as the structured `WebError` the caller routes on — which carries the branchable detail (the missing id, the ambiguous candidate set) in its code and message.
 
 ```ts type-equiv
 type WebProviderStatus =
@@ -83,15 +83,7 @@ type WebProviderStatus =
   | { readonly available: false; readonly reason: 'missing-credential' | 'misconfigured' }
 ```
 
-The service aggregates provider status into a `WebCapabilityStatus`: whether the capability has a selected usable provider, or the broad category in which selection fails. It carries the winning `providerId` on the available branch but NOT the per-reason payload (the missing id, the ambiguous set) — that branchable detail lives in the thrown `WebError`, the surface callers route on, so the same fact never gets two homes that can disagree.
-
-```ts type-equiv
-type WebCapabilityStatus =
-  | { readonly available: true; readonly providerId: string }
-  | { readonly available: false; readonly reason: 'none' | 'configured-missing' | 'configured-unavailable' | 'ambiguous' }
-```
-
-Selection never depends on registration, config, or HMR order: a capability has an explicit provider id (config `searchProvider`/`fetchProvider`, or the matching env var feeding the same field), or auto-selects when exactly one usable provider is registered; multiple usable providers with no configured id is `ambiguous`, not first-wins.
+Selection never depends on registration, config, or HMR order: a capability has an explicit provider id (config `searchProvider`/`fetchProvider`, or the matching env var feeding the same field), or auto-selects when exactly one usable provider is registered; multiple usable providers with no configured id is `WEB_PROVIDER_AMBIGUOUS`, not first-wins.
 
 ## Errors
 
@@ -99,4 +91,4 @@ Selection never depends on registration, config, or HMR order: a capability has
 
 ## The service
 
-`WebService` (`ctx.web`, defined in [`packages/web/web/src/index.ts`](../../packages/web/web/src/index.ts)) is a provider registry plus a provider-selecting execution surface, close to `LlmService`'s shape: `registerSearchProvider`/`registerFetchProvider` (duplicate ids throw `WEB_DUPLICATE_PROVIDER`, return disposers, emit `web/providers-change`), `searchStatus`/`fetchStatus` (derived, never stored), and `search`/`fetch` (resolve the provider at call time, throw a structured `WebError` when the capability cannot run). Providers issue requests with the platform-native `fetch` (Node 24), mirroring `dsh-llm-deepseek`; the `dsh-web-fetch-local` provider owns safe retrieval (http/https-only, credential rejection, byte/char/timeout/redirect caps, same-origin-only redirects with per-hop re-validation, charset decoding) while `dsh-tool-web` owns presentation (HTML→markdown). SSRF / private-network blocking is deferred (see the RFC) — until it lands, `web_fetch` must not be enabled where it can reach sensitive internal targets.
+`WebService` (`ctx.web`, defined in [`packages/web/web/src/index.ts`](../../packages/web/web/src/index.ts)) is a provider registry plus a provider-selecting execution surface, close to `LlmService`'s shape: `registerSearchProvider`/`registerFetchProvider` (duplicate ids throw `WEB_DUPLICATE_PROVIDER`, return disposers) and `search`/`fetch` (resolve the provider at call time, throw a structured `WebError` when the capability cannot run). Providers issue requests with the platform-native `fetch` (Node 24), mirroring `dsh-llm-deepseek`; the `dsh-web-fetch-local` provider owns safe retrieval (http/https-only, credential rejection, byte/char/timeout/redirect caps, same-origin-only redirects with per-hop re-validation, charset decoding) while `dsh-tool-web` owns presentation (HTML→markdown). SSRF / private-network blocking is deferred (see the RFC) — until it lands, `web_fetch` must not be enabled where it can reach sensitive internal targets.

docs/development.i18n.yaml

@@ -2,5 +2,5 @@
 # side as of the last confirmed-consistent state. Both languages carry equal authority;
 # after editing either side, bring the other along and re-record with:
 #   pnpm run verify-translation-pairing --write
-development.md: 28babca2b59c844690750d767c242c08c37bf702
-development.zh.md: b34c52cebd3f333b6554ca2b5ebd66463e436572
+development.md: c57ccd4a393bdf54a13c5786b70b6b665904aedd
+development.zh.md: 198b7651e6937b3f5280a6104a5b43b35f40262b

docs/development.md

@@ -98,6 +98,7 @@ pnpm run lint:fix       # eslint . --fix
 pnpm run doc-typecheck  # compile checked TypeScript snippets in Markdown docs
 pnpm run gen-cordis-catalog     # regenerate docs/cordis-catalog/events-and-services.md from source
 pnpm run verify-cordis-catalog  # fail if the cordis events/services catalog is stale
+pnpm run gen-rfc-index          # regenerate the docs/rfc/README.md index tables from the RFC tree
 pnpm run verify-md-wrap  # fail on hard-wrapped prose paragraphs in docs/README markdown
 pnpm run verify-type-equiv  # fail if a ```ts type-equiv doc block drifts from its source type
 pnpm run verify-doc-budgets  # fail if a budgeted standing doc exceeds its word ceiling

docs/development.zh.md

@@ -98,6 +98,7 @@ pnpm run lint:fix       # eslint . --fix
 pnpm run doc-typecheck  # compile checked TypeScript snippets in Markdown docs
 pnpm run gen-cordis-catalog     # regenerate docs/cordis-catalog/events-and-services.md from source
 pnpm run verify-cordis-catalog  # fail if the cordis events/services catalog is stale
+pnpm run gen-rfc-index          # regenerate the docs/rfc/README.md index tables from the RFC tree
 pnpm run verify-md-wrap  # fail on hard-wrapped prose paragraphs in docs/README markdown
 pnpm run verify-type-equiv  # fail if a ```ts type-equiv doc block drifts from its source type
 pnpm run verify-doc-budgets  # fail if a budgeted standing doc exceeds its word ceiling

docs/module-graph.md

@@ -48,9 +48,6 @@ graph TD
   tools --> agent
   tools --> llm
   tools --> system-prompt
-  ui-stdio --> agent
-  ui-stdio --> llm
-  ui-stdio --> session
   acp --> agent
   acp --> llm
   acp --> session
@@ -116,12 +113,14 @@ graph TD
   tool-subagent --> tools
   acp-agent --> acp
   acp-agent --> agent-core
+  acp-agent --> app-boot
   acp-agent --> session-persistence-jsonl
   stdio-agent --> agent
   stdio-agent --> agent-core
+  stdio-agent --> app-boot
+  stdio-agent --> llm
   stdio-agent --> session
   stdio-agent --> session-persistence-jsonl
-  stdio-agent --> ui-stdio
   subagent-fork --> agent
   subagent-fork --> session
   subagent-fork --> subagent
@@ -132,6 +131,7 @@ graph TD
 
 | Package | Depends on |
 | --- | --- |
+| `app-boot` | — |
 | `brand` | — |
 | `bash` | `brand` |
 | `llm` | `brand` |
@@ -158,7 +158,6 @@ graph TD
 | `session-persistence-jsonl` | `session`, `session-persistence` |
 | `session-persistence-sqlite` | `session`, `session-persistence` |
 | `tools` | `agent`, `llm`, `system-prompt` |
-| `ui-stdio` | `agent`, `llm`, `session` |
 | `acp` | `agent`, `llm`, `session`, `session-persistence`, `tools` |
 | `agent-loop` | `agent`, `llm`, `session`, `session-persistence`, `system-prompt`, `tools` |
 | `hooks-codex` | `agent`, `hook-protocol`, `llm`, `session`, `tools` |
@@ -173,7 +172,7 @@ graph TD
 | `subagent-inprocess` | `agent`, `llm`, `session`, `subagent` |
 | `subagent-mock` | `agent`, `llm`, `subagent` |
 | `tool-subagent` | `agent`, `llm`, `subagent`, `tools` |
-| `acp-agent` | `acp`, `agent-core`, `session-persistence-jsonl` |
-| `stdio-agent` | `agent`, `agent-core`, `session`, `session-persistence-jsonl`, `ui-stdio` |
+| `acp-agent` | `acp`, `agent-core`, `app-boot`, `session-persistence-jsonl` |
+| `stdio-agent` | `agent`, `agent-core`, `app-boot`, `llm`, `session`, `session-persistence-jsonl` |
 | `subagent-fork` | `agent`, `session`, `subagent`, `subagent-inprocess` |
 | `subagent-spawn` | `subagent`, `subagent-inprocess` |

docs/rfc/README.md

@@ -16,7 +16,7 @@ The date in the filename is when the topic was **first proposed** (per git histo
 
 ## Classification
 
-Each RFC is filed under exactly one **class** — the kind of decision it records. The class is encoded in the path (the folder *is* the label, so a file's location declares its class) and the set is **closed**: `scripts/verify-rfc-classification.ts` rejects any folder outside the set and asserts this index lists every RFC under the heading matching its path. Adding a new class means amending that gate and this section, not just dropping a new folder. See [the classification RFC](implemented/process/2026-06-20-rfc-classification.md) for why the taxonomy is path-encoded and gated.
+Each RFC is filed under exactly one **class** — the kind of decision it records. The class is encoded in the path (the folder *is* the label, so a file's location declares its class) and the set is **closed**: `scripts/rfc-index.ts` owns the canonical set, `scripts/verify-rfc-classification.ts` rejects any folder outside it, and the index tables below are **generated** from the tree (`pnpm run gen-rfc-index` rewrites the marker-delimited regions from each RFC's path, H1 title, and filename date; the gate fails when they are stale). Adding a new class means amending that `const` and this section, not just dropping a new folder. See [the classification RFC](implemented/process/2026-06-20-rfc-classification.md) for why the taxonomy is path-encoded and gated, and [the index-generation RFC](implemented/process/2026-07-04-generate-rfc-index-tables.md) for why the tables are generated while this prose stays curated.
 
 | Class | What it covers |
 |---|---|
@@ -37,11 +37,12 @@ Do NOT write one for a mechanical or local choice (a variable name, a one-file r
 
 ## Proposed
 
+<!-- gen-rfc-index:begin proposed -->
 ### Feature
 
 | Title | First proposed |
 |---|---|
-| [Agent Client Protocol (ACP) support for external editors](proposed/feature/2026-06-14-acp-agent-client-protocol.md) | 2026-06-14 |
+| [Agent Client Protocol (ACP) support — drive the coding agent from external editors](proposed/feature/2026-06-14-acp-agent-client-protocol.md) | 2026-06-14 |
 | [Multiplex concurrent ACP sessions over one connection](proposed/feature/2026-06-14-acp-multi-session.md) | 2026-06-14 |
 | [Optional Code Mode — model writes TypeScript against an SDK of all tools](proposed/feature/2026-06-15-optional-code-mode.md) | 2026-06-15 |
 | [Pre-tool input rewrite — a consistent design](proposed/feature/2026-06-30-pre-tool-input-rewrite.md) | 2026-06-30 |
@@ -51,17 +52,7 @@ Do NOT write one for a mechanical or local choice (a variable name, a one-file r
 | Title | First proposed |
 |---|---|
 | [Unify the agent id and the session id](proposed/simplification/2026-06-20-unify-agent-and-session-id.md) | 2026-06-20 |
-| [Prune producer-less vocabulary variants (block cache hints, the `agent` message source, the `continuation` turn trigger)](proposed/simplification/2026-07-04-prune-producerless-vocabulary-variants.md) | 2026-07-04 |
-| [Drop `GenerateOptions.prefill` and `ToolSchema.strict` — request knobs with no working end-to-end path](proposed/simplification/2026-07-04-drop-inert-request-knobs.md) | 2026-07-04 |
-| [Drop the unconsumed web observation surface — the `providers-change` event and the status methods](proposed/simplification/2026-07-04-drop-unconsumed-web-observation-surface.md) | 2026-07-04 |
-| [Drop the `image` content block until a path can honor it](proposed/simplification/2026-07-04-drop-image-content-block.md) | 2026-07-04 |
-| [Prune write-only fields and a dead routing knob from the fs seam](proposed/simplification/2026-07-04-prune-write-only-fs-surface.md) | 2026-07-04 |
-| [Trim unreachable ACP bridge surface — the branding knobs and the kind-sniffing fallback](proposed/simplification/2026-07-04-trim-acp-bridge-unreachable-surface.md) | 2026-07-04 |
 | [Prune dead core-spine surface — `SurfaceManager.invalidate()`, the loop-internal exports, `ToolExecutionResult.callId`](proposed/simplification/2026-07-04-prune-dead-core-spine-surface.md) | 2026-07-04 |
-| [Share the app bins' boot glue instead of maintaining twin copies](proposed/simplification/2026-07-04-share-app-bin-boot-glue.md) | 2026-07-04 |
-| [Remove the `agent/steering` mirror emit](proposed/simplification/2026-07-04-remove-agent-steering-mirror.md) | 2026-07-04 |
-| [Tighten the hook-protocol contract — dialect, discarded fields, double defaults, and lib-owned `hook/result` semantics](proposed/simplification/2026-07-04-tighten-hook-protocol-contract.md) | 2026-07-04 |
-| [Fold the stdio UI helper into the stdio app](proposed/simplification/2026-07-04-fold-stdio-ui-helper.md) | 2026-07-04 |
 
 ### Architecture
 
@@ -74,101 +65,113 @@ Do NOT write one for a mechanical or local choice (a variable name, a one-file r
 
 | Title | First proposed |
 |---|---|
-| [Architectural conformance — dependency rules and the adapter kit](proposed/process/2026-06-11-architectural-conformance.md) | 2026-06-11 |
 | [API extractor reports](proposed/process/2026-06-11-api-extractor-reports.md) | 2026-06-11 |
+| [Architectural conformance — dependency rules and the adapter kit](proposed/process/2026-06-11-architectural-conformance.md) | 2026-06-11 |
 | [Supply chain checks and vendor drift verification](proposed/process/2026-06-11-supply-chain-and-vendor-drift.md) | 2026-06-11 |
 | [Discover package inventories instead of maintaining static lists](proposed/process/2026-06-20-discover-package-inventory.md) | 2026-06-20 |
-| [Generate the RFC index tables](proposed/process/2026-07-04-generate-rfc-index-tables.md) | 2026-07-04 |
 
 ### Testing
 
 | Title | First proposed |
 |---|---|
-| [Mutation testing as the coverage counterweight](proposed/testing/2026-06-11-mutation-testing.md) | 2026-06-11 |
 | [Deterministic tests, the replay invariant fixture, and race stress](proposed/testing/2026-06-11-deterministic-and-stress-testing.md) | 2026-06-11 |
-| [Single-source the acp-agent replay config](proposed/testing/2026-07-04-single-source-acp-replay-config.md) | 2026-07-04 |
+| [Mutation testing as the coverage counterweight](proposed/testing/2026-06-11-mutation-testing.md) | 2026-06-11 |
+<!-- gen-rfc-index:end proposed -->
 
 ## Implemented
 
+<!-- gen-rfc-index:begin implemented -->
 ### Feature
 
 | Title | First proposed |
 |---|---|
 | [Filesystem tool schemas — model-facing read/write/edit shapes](implemented/feature/2026-06-17-filesystem-tool-schemas.md) | 2026-06-17 |
-| [Rich ACP bash rendering — the terminal card (`_meta`) and command classification](implemented/feature/2026-06-18-acp-terminal-and-tool-rendering.md) | 2026-06-18 |
+| [Rich ACP bash rendering — the terminal card via the `_meta` convention](implemented/feature/2026-06-18-acp-terminal-and-tool-rendering.md) | 2026-06-18 |
 | [Compaction as a capability seam (abstract contract + basic backend)](implemented/feature/2026-06-18-compaction-capability-seam.md) | 2026-06-18 |
 | [Subagent capability seam](implemented/feature/2026-06-21-subagent-capability-seam.md) | 2026-06-21 |
 | [ACP subagent backend (out-of-process delegation)](implemented/feature/2026-06-22-acp-subagent-backend.md) | 2026-06-22 |
 | [The `todo_write` tool — model task list as event-sourced session state](implemented/feature/2026-06-29-todo-write-tool.md) | 2026-06-29 |
+| [dsh-hooks-claude + dsh-hooks-codex — the Claude Code / Codex hook bridges](implemented/feature/2026-06-30-hook-bridges.md) | 2026-06-30 |
+| [dsh-hook-protocol — the shared Claude Code / Codex hook wire-protocol core](implemented/feature/2026-06-30-hook-protocol-lib.md) | 2026-06-30 |
 | [Interception seams — the typed-Decision surface a hook programs against](implemented/feature/2026-06-30-interception-seams.md) | 2026-06-30 |
 | [Subagent lifecycle enrichment — lastAssistantMessage (observe-only)](implemented/feature/2026-06-30-subagent-observe-enrich.md) | 2026-06-30 |
-| [dsh-hook-protocol — the shared Claude Code / Codex hook wire-protocol core](implemented/feature/2026-06-30-hook-protocol-lib.md) | 2026-06-30 |
-| [dsh-hooks-claude + dsh-hooks-codex — the Claude Code / Codex hook bridges](implemented/feature/2026-06-30-hook-bridges.md) | 2026-06-30 |
 
 ### Simplification
 
 | Title | First proposed |
 |---|---|
 | [Drop the mutable session summary](implemented/simplification/2026-06-19-drop-mutable-session-summary.md) | 2026-06-19 |
-| [Drop unconsumed assembled LLM convenience surfaces](implemented/simplification/2026-06-20-drop-unconsumed-llm-assembled-surfaces.md) | 2026-06-20 |
+| [Fold trace-only session facts into load-bearing events](implemented/simplification/2026-06-20-collapse-trace-only-session-events.md) | 2026-06-20 |
 | [Drop the unconsumed `llm/adapter-change` event](implemented/simplification/2026-06-20-drop-unconsumed-llm-adapter-change-event.md) | 2026-06-20 |
+| [Drop unconsumed assembled LLM convenience surfaces](implemented/simplification/2026-06-20-drop-unconsumed-llm-assembled-surfaces.md) | 2026-06-20 |
 | [Prune dead methods from the persistence seam](implemented/simplification/2026-06-20-prune-dead-seam-methods.md) | 2026-06-20 |
 | [Keep one public stop primitive](implemented/simplification/2026-06-20-public-agent-stop-surface.md) | 2026-06-20 |
-| [Fold trace-only session facts into load-bearing events](implemented/simplification/2026-06-20-collapse-trace-only-session-events.md) | 2026-06-20 |
 | [Stop mirroring durable boundaries as agent events](implemented/simplification/2026-06-20-remove-agent-boundary-mirror-events.md) | 2026-06-20 |
 | [Split the filesystem seam — provider text mutations plus the `dsh-fs-policy` plugin](implemented/simplification/2026-06-26-fsspec-style-fs-seam.md) | 2026-06-26 |
 | [Stop mirroring the token stream as an agent event](implemented/simplification/2026-07-02-remove-stream-chunk-mirror.md) | 2026-07-02 |
+| [Drop the `image` content block until a path can honor it](implemented/simplification/2026-07-04-drop-image-content-block.md) | 2026-07-04 |
+| [Drop `GenerateOptions.prefill` and `ToolSchema.strict` — request knobs with no working end-to-end path](implemented/simplification/2026-07-04-drop-inert-request-knobs.md) | 2026-07-04 |
+| [Drop the unconsumed web observation surface — the `providers-change` event and the status methods](implemented/simplification/2026-07-04-drop-unconsumed-web-observation-surface.md) | 2026-07-04 |
+| [Fold the stdio UI helper into the stdio app](implemented/simplification/2026-07-04-fold-stdio-ui-helper.md) | 2026-07-04 |
+| [Prune producer-less vocabulary variants (block cache hints, the `agent` message source, the `continuation` turn trigger)](implemented/simplification/2026-07-04-prune-producerless-vocabulary-variants.md) | 2026-07-04 |
+| [Prune write-only fields and a dead routing knob from the fs seam](implemented/simplification/2026-07-04-prune-write-only-fs-surface.md) | 2026-07-04 |
+| [Remove the `agent/steering` mirror emit](implemented/simplification/2026-07-04-remove-agent-steering-mirror.md) | 2026-07-04 |
+| [Share the app bins' boot glue instead of maintaining twin copies](implemented/simplification/2026-07-04-share-app-bin-boot-glue.md) | 2026-07-04 |
+| [Tighten the hook-protocol contract — dialect, discarded fields, double defaults, and lib-owned `hook/result` semantics](implemented/simplification/2026-07-04-tighten-hook-protocol-contract.md) | 2026-07-04 |
+| [Trim unreachable ACP bridge surface — the branding knobs and the kind-sniffing fallback](implemented/simplification/2026-07-04-trim-acp-bridge-unreachable-surface.md) | 2026-07-04 |
 
 ### Architecture
 
 | Title | First proposed |
 |---|---|
-| [Microkernel: extension via Cordis event taxonomy, one concrete loop](implemented/architecture/2026-06-11-microkernel-event-taxonomy.md) | 2026-06-11 |
-| [Event-sourced sessions with derived message history](implemented/architecture/2026-06-11-event-sourced-sessions.md) | 2026-06-11 |
 | [Provider-neutral content-block vocabulary owned by dsh-llm](implemented/architecture/2026-06-11-content-block-vocabulary.md) | 2026-06-11 |
 | [Custom typed tool-schema DSL instead of schemastery](implemented/architecture/2026-06-11-custom-schema-dsl.md) | 2026-06-11 |
-| [Tool schemas are part of the system-prompt assembly](implemented/architecture/2026-06-11-tool-schemas-in-prompt-assembly.md) | 2026-06-11 |
-| [Runtime arg validation at the model boundary](implemented/architecture/2026-06-11-runtime-arg-validation.md) | 2026-06-11 |
 | [Dev-mode invariants over compile-time deep-readonly](implemented/architecture/2026-06-11-dev-invariants-over-deep-readonly.md) | 2026-06-11 |
+| [Event-sourced sessions with derived message history](implemented/architecture/2026-06-11-event-sourced-sessions.md) | 2026-06-11 |
+| [Microkernel — extension via Cordis event taxonomy, one concrete loop](implemented/architecture/2026-06-11-microkernel-event-taxonomy.md) | 2026-06-11 |
+| [Runtime arg validation at the model boundary](implemented/architecture/2026-06-11-runtime-arg-validation.md) | 2026-06-11 |
 | [Structured error taxonomy](implemented/architecture/2026-06-11-structured-error-taxonomy.md) | 2026-06-11 |
+| [Tool schemas are part of the system-prompt assembly](implemented/architecture/2026-06-11-tool-schemas-in-prompt-assembly.md) | 2026-06-11 |
 | [Capability seams — interface / implementation / consumer split](implemented/architecture/2026-06-13-capability-seams.md) | 2026-06-13 |
 | [Two LLM adapters as a design-verification twin](implemented/architecture/2026-06-13-twin-llm-adapters.md) | 2026-06-13 |
-| [Session persistence as an abstract service over `SessionEvent`](implemented/architecture/2026-06-14-session-persistence.md) | 2026-06-14 |
+| [Session persistence as an abstract service over the existing `SessionEvent`](implemented/architecture/2026-06-14-session-persistence.md) | 2026-06-14 |
 | [Every session event is enclosed in a turn](implemented/architecture/2026-06-15-turn-enclosure-invariant.md) | 2026-06-15 |
 | [Filesystem capability seam — ctx.fs, local backend, and model-facing filesystem tools](implemented/architecture/2026-06-17-filesystem-capability-seam.md) | 2026-06-17 |
-| [Shared persistence write coordinator](implemented/architecture/2026-06-18-shared-persistence-write-coordinator.md) | 2026-06-18 |
 | [Agent lifecycle and ownership seams](implemented/architecture/2026-06-18-agent-lifecycle-and-ownership-seams.md) | 2026-06-18 |
 | [Session surface — a linked list over the event log for LLM message derivation](implemented/architecture/2026-06-18-session-surface.md) | 2026-06-18 |
-| [Reorganize packages into a modular hierarchy](implemented/architecture/2026-06-20-package-hierarchy.md) | 2026-06-20 |
+| [Shared persistence write coordinator](implemented/architecture/2026-06-18-shared-persistence-write-coordinator.md) | 2026-06-18 |
 | [Branded IDs everywhere they belong](implemented/architecture/2026-06-20-branded-ids.md) | 2026-06-20 |
 | [Extract example apps into packages](implemented/architecture/2026-06-20-extract-example-app-packages.md) | 2026-06-20 |
+| [Reorganize packages into a modular hierarchy](implemented/architecture/2026-06-20-package-hierarchy.md) | 2026-06-20 |
 | [Mandatory `User-Agent` attribution for provider requests](implemented/architecture/2026-06-21-mandatory-app-attribution-headers.md) | 2026-06-21 |
-| [Web capability seam — provider registry and model-facing web tools](implemented/architecture/2026-06-24-web-capability-seam.md) | 2026-06-24 |
+| [Web capability seam - stable tools over multiple providers](implemented/architecture/2026-06-24-web-capability-seam.md) | 2026-06-24 |
 | [Make `dsh-fs-policy` an event-gate plugin, not a method interface](implemented/architecture/2026-06-26-file-context-as-event-gate.md) | 2026-06-26 |
-| [Event-domain semantics — session is the fact log, agent is the live surface](implemented/architecture/2026-06-30-event-domain-semantics.md) | 2026-06-30 |
 | [stdin + extra env on the bash seam](implemented/architecture/2026-06-30-bash-stdin-env-trusted-plugin-surface.md) | 2026-06-30 |
+| [Event-domain semantics — session is the fact log, agent is the live surface](implemented/architecture/2026-06-30-event-domain-semantics.md) | 2026-06-30 |
 | [Resolve filesystem paths against the caller's session cwd](implemented/architecture/2026-07-02-fs-per-session-cwd.md) | 2026-07-02 |
-| [Tagged render-intent union for tool-call presentation](implemented/architecture/2026-07-02-tool-render-intent-union.md) | 2026-07-02 |
 | [Result-time applied-hunk diffs for file mutations](implemented/architecture/2026-07-02-result-time-applied-hunk-diffs.md) | 2026-07-02 |
+| [Tagged render-intent union for tool-call presentation](implemented/architecture/2026-07-02-tool-render-intent-union.md) | 2026-07-02 |
 | [Add direct directory listing to the filesystem seam](implemented/architecture/2026-07-03-filesystem-directory-listing-seam.md) | 2026-07-03 |
 
 ### Process
 
 | Title | First proposed |
 |---|---|
-| [Vendor Cordis as source, not npm dependencies](implemented/process/2026-06-11-vendor-cordis-as-source.md) | 2026-06-11 |
+| [Doc-sync enforcement](implemented/process/2026-06-11-doc-sync-enforcement.md) | 2026-06-11 |
 | [Mechanical quality gates over prose guidelines](implemented/process/2026-06-11-quality-gates.md) | 2026-06-11 |
 | [tsdown for JS bundling instead of dumble](implemented/process/2026-06-11-tsdown-over-dumble.md) | 2026-06-11 |
-| [Doc-sync enforcement](implemented/process/2026-06-11-doc-sync-enforcement.md) | 2026-06-11 |
+| [Vendor Cordis as source, not npm dependencies](implemented/process/2026-06-11-vendor-cordis-as-source.md) | 2026-06-11 |
 | [pnpm as the package manager instead of Yarn 4](implemented/process/2026-06-16-pnpm-over-yarn.md) | 2026-06-16 |
 | [TSC-first build and one tsconfig](implemented/process/2026-06-17-ts-build-config.md) | 2026-06-17 |
 | [Markdown cross-link validity linting](implemented/process/2026-06-18-markdown-cross-link-lint.md) | 2026-06-18 |
 | [Core-data-structures catalog and the `ts type-equiv` drift gate](implemented/process/2026-06-20-core-data-structures-catalog.md) | 2026-06-20 |
 | [Generated cordis events + services catalog](implemented/process/2026-06-20-generated-cordis-catalog.md) | 2026-06-20 |
 | [Classify RFCs by kind via path-encoded subdirectories](implemented/process/2026-06-20-rfc-classification.md) | 2026-06-20 |
-| [Generated tool-schema catalog (boot-and-harvest)](implemented/process/2026-07-02-tool-schema-catalog.md) | 2026-07-02 |
 | [Bilingual documentation via paired sibling files and a pairing gate](implemented/process/2026-07-02-bilingual-docs-and-pairing-gate.md) | 2026-07-02 |
+| [Generated tool-schema catalog (boot-and-harvest)](implemented/process/2026-07-02-tool-schema-catalog.md) | 2026-07-02 |
+| [JSDoc completeness gate for the cordis surface](implemented/process/2026-07-04-cordis-jsdoc-completeness-gate.md) | 2026-07-04 |
 | [Documentation tiers, budgets, and the ceiling gate](implemented/process/2026-07-04-doc-tiers-and-budgets.md) | 2026-07-04 |
+| [Generate the RFC index tables](implemented/process/2026-07-04-generate-rfc-index-tables.md) | 2026-07-04 |
 
 ### Testing
 
@@ -178,13 +181,16 @@ Do NOT write one for a mechanical or local choice (a variable name, a one-file r
 | [ACP snapshot tests — record-once / replay-deterministic](implemented/testing/2026-06-19-acp-snapshot-tests.md) | 2026-06-19 |
 | [Real-API e2e in CI against the external DeepSeek API](implemented/testing/2026-06-19-real-api-e2e-ci.md) | 2026-06-19 |
 | [Use `session.jsonl` as the only snapshot session-log artifact](implemented/testing/2026-06-20-remove-redundant-snapshot-log-goldens.md) | 2026-06-20 |
-| [Per-session snapshot replay for nested agents](implemented/testing/2026-06-22-subagent-snapshot-replay.md) | 2026-06-22 |
 | [Persist the seed boundary so fork-child replay routes correctly](implemented/testing/2026-06-22-fork-child-replay-seed-boundary.md) | 2026-06-22 |
 | [Record fork and mixed spawn+fork snapshot scenarios](implemented/testing/2026-06-22-fork-snapshot-scenarios.md) | 2026-06-22 |
+| [Per-session snapshot replay for nested agents](implemented/testing/2026-06-22-subagent-snapshot-replay.md) | 2026-06-22 |
 | [Hook snapshot matrix — end-to-end goldens for both bridges](implemented/testing/2026-07-04-hook-snapshot-matrix.md) | 2026-07-04 |
+| [Single-source the acp-agent replay config](implemented/testing/2026-07-04-single-source-acp-replay-config.md) | 2026-07-04 |
+<!-- gen-rfc-index:end implemented -->
 
 ## Rejected
 
+<!-- gen-rfc-index:begin rejected -->
 ### Simplification
 
 | Title | First proposed |
@@ -208,3 +214,4 @@ Do NOT write one for a mechanical or local choice (a variable name, a one-file r
 |---|---|
 | [Deep-readonly public surfaces](rejected/architecture/2026-06-11-immutable-public-surfaces.md) | 2026-06-11 |
 | [Make the shared example base providerless](rejected/architecture/2026-06-20-providerless-example-base.md) | 2026-06-20 |
+<!-- gen-rfc-index:end rejected -->

docs/rfc/implemented/architecture/2026-06-11-content-block-vocabulary.md

@@ -10,12 +10,12 @@ The harness needs one internal language for messages that the loop, session log,
 
 ## Decision
 
-Own it: messages are arrays of typed content blocks (`text`, `reasoning`, `tool-call`, `tool-result`, `image`), with the union derived from the merge-extensible `ContentBlockMap` so plugins add block types via declaration merging. The same merge-extensible-map pattern types every "stringly" field (`MessageSource`, `FinishReason`, `TurnTrigger`, `TurnEndReason`). Streaming is a raw chunk protocol; `BlockAssembler` is the single shared assembly implementation. Adapters translate to provider wire formats — mapping cost lives in adapters, where it belongs.
+Own it: messages are arrays of typed content blocks (`text`, `reasoning`, `tool-call`, `tool-result`), with the union derived from the merge-extensible `ContentBlockMap` so plugins add block types via declaration merging. The same merge-extensible-map pattern types every "stringly" field (`MessageSource`, `FinishReason`, `TurnTrigger`, `TurnEndReason`). Streaming is a raw chunk protocol; `BlockAssembler` is the single shared assembly implementation. Adapters translate to provider wire formats — mapping cost lives in adapters, where it belongs.
 
 In-session context injection (`context/message`, `steering/message`) renders as tagged user-role envelopes (the system-reminder pattern) rather than a new role, so adapters carry zero burden. Live-adapter review has since validated the tagged-envelope rendering against current DeepSeek behavior; a future provider-specific mismatch should be handled in that adapter rather than by adding a new role to the canonical content vocabulary.
 
 ## Consequences
 
-- Reasoning, prefill, cache hints, and multimodal content all have a home without provider contortions.
+- Reasoning has a home without provider contortions. Multimodal content deliberately has NO core block type: the core set is limited to blocks every shipping path honors, and a multimodal feature adds its block type through the merge-extensible map in the same coordinated change that maps it in the adapters, surfaces it in the UI bridges, and prices it in compaction — see [the drop-image RFC](../simplification/2026-07-04-drop-image-content-block.md). Block cache hints likewise have no core field: DeepSeek prompt caching is automatic, so no shipping adapter can transmit a hint; a caching feature adds a `cache` field together with the adapter that honors it — see [the producer-less-variants RFC](../simplification/2026-07-04-prune-producerless-vocabulary-variants.md). Assistant-prefix continuation (prefill) likewise has no request field: DeepSeek's chat-prefix completion is a Beta feature on a base URL neither shipping adapter targets, so a prefill feature adds `GenerateOptions.prefill` together with the adapter that honors it — see [the inert-request-knobs RFC](../simplification/2026-07-04-drop-inert-request-knobs.md).
 - Every adapter pays a translation cost; the first real adapters have since validated the streaming protocol, and new adapters should continue proving their provider-specific mapping in adapter-local tests.
 - IDs that cross package boundaries are branded (`CallId`, `SessionId`, `AgentId`) — nominal typing at zero runtime cost.

docs/rfc/implemented/architecture/2026-06-20-extract-example-app-packages.md

@@ -14,7 +14,7 @@ Each example is now **mostly an invocation of an app package**, splitting the wi
 
 - **`@deepseek-ai/dsh-agent-core`** ([packages/core/agent-core](../../../../packages/core/agent-core)) — a Cordis bundle plugin for the providerless, executor-less, UI-less spine: `timer` + `llm` + sessions + system-prompt + tools + agents + invariants + `tool-bash` + `agent-loop`, mounted as child plugins inside its `apply(ctx)` via `ctx.plugin(...)`. This is the old `base-core.yml` **minus** `bash-local`, **plus** `timer` and the loop, as code instead of a YAML include. The bundle **forwards** `agent-loop`'s `agents` list as its own config (`export const Config = AgentLoop.Config`, default `[]`, the existing `AgentLoop.Config` shape in [packages/core/agent-loop/src/index.ts](../../../../packages/core/agent-loop/src/index.ts)) — so each app supplies its own pre-created agents. This is precisely the reason the old `base-core.yml` gave for keeping `agent-loop` *out* of the shared core ("the examples disagree — stdio needs a pre-created `main`, acp needs none"); forwarding the config dissolves that objection — the loop is shared, the agents list is per-app. The bundle children register into the root service store, so a leaf-mounted sibling (the adapter, the executor) sees them exactly as a nested `plugin-include` subtree's services were seen before. Depending on the CONCRETE `dsh-agent-loop` (not just the `dsh-agent` interface) is deliberate and is the sanctioned exception to the "extension plugins depend on interfaces, never on the concrete loop" rule (packages/README.md, docs/architecture.md § Layering): the rule constrains plugins that EXTEND the system, whereas this bundle's whole job is to COMPOSE the concrete spine. Swapping the loop means publishing a different bundle, not rewiring every extension.
 - **`@deepseek-ai/dsh-stdio-agent`** ([packages/ui/stdio-agent](../../../../packages/ui/stdio-agent)) and **`@deepseek-ai/dsh-acp-agent`** ([packages/ui/acp-agent](../../../../packages/ui/acp-agent)) — app packages, each consuming `dsh-agent-core` and **baking in its coupled front-door cluster**: stdio = `ui-stdio` + console logger + a pre-created `main`; acp = the `acp` bridge + JSONL persistence + **no stdout logger** + no pre-created agents. The leaf no longer carries the cluster, so it has no logger entry to copy wrong by default — the common stdout-purity mistake loses its foothold. (A leaf can still *add* a sibling logger entry — a package cannot forbid what a leaf author writes — so the rule "never add a stdout logger to an ACP leaf" stays documented at the leaf; what changed is that the default leaf has nothing to get wrong.) They land under the existing `ui` group alongside `acp`, so no new package group (and no `tsconfig`/`packages/README` group plumbing) was needed.
-- **`start.ts` is gone.** Each app package exposes a `bin` (`dsh-stdio-agent` / `dsh-acp-agent`); the `demo:*` scripts invoke it (e.g. `dsh-stdio-agent ./cordis.yml`). The Loader-boot tail, `.env` loading, snapshot-mode selection, and stdin-dispose lifecycle moved into that bin, owned by the app. The `bin.ts` files are coverage-excluded (a self-executing CLI entry, like the old `start.ts`) and driven by the keyless Loader-path tests.
+- **`start.ts` is gone.** Each app package exposes a `bin` (`dsh-stdio-agent` / `dsh-acp-agent`); the `demo:*` scripts invoke it (e.g. `dsh-stdio-agent ./cordis.yml`). The Loader-boot tail, `.env` loading, and fail-loud guards live in the shared [`@deepseek-ai/dsh-app-boot`](../../../../packages/ui/app-boot) package (unit-tested under the per-file coverage gate — see [share the app bins' boot glue](../simplification/2026-07-04-share-app-bin-boot-glue.md)); each bin is a thin self-executing composition over those helpers plus its app-specific lifecycle (the ACP bin: snapshot-mode selection and stdin-dispose). The `bin.ts` files themselves stay coverage-excluded (self-executing CLI entries, like the old `start.ts`) and are driven by the keyless Loader-path tests.
 - **Each leaf `cordis.yml` collapses** to backends + config: the LLM adapter (`llm-deepseek` with apiKey/models, or `llm-replay`), the bash executor (`bash-local`), `hmr` for the stdio demos (see the amendment below), and one app entry carrying the app's config (model, system prompt, persistence root — surfaced as the app package's own `Config`, which routes each value to wherever the app wires it: stdio onto its pre-created agent, acp onto the bridge plugin).
 - **echo-agent folds onto `dsh-stdio-agent`**, swapping the LLM backend to the local `mock-llm` and adding the local `echo-tool` (plus `bash-local`, which the spine's `tool-bash` injects) at the leaf — the clean demonstration of "swap the backend, keep the app". `mock-llm.ts` / `echo-tool.ts` stay as example-local teaching plugins.
 - **`base.yml`, `base-core.yml`, and `acp-agent/acp-tail.yml` are retired** — the spine they shared now lives in `dsh-agent-core`.

docs/rfc/implemented/architecture/2026-06-24-web-capability-seam.md

@@ -22,7 +22,7 @@ Introduce web access as a first-class capability seam following [the capability-
 
 Providers do not register tools. Providers register capabilities. `dsh-tool-web` is the only owner of model-facing names, descriptions, prompt guidance, JSON schemas, and presentation.
 
-Search and fetch are separate capabilities and separate model-facing tools, but they are deliberately one seam. `ctx.web` is a single web-access middle layer between provider packages on one side and the tool consumer on the other: one service to inject, one provider-selection policy owner, one abort/error vocabulary, one place a product configures "how this harness reaches the web." The two halves do not share a request schema and have no shared business logic — search normalizes provider-backed discovery into a portable result with optional answer text and citeable sources, while fetch retrieves a concrete public HTTP(S) URL and returns a status code plus bounded decoded content — but they are parallel registries on one capability surface, not two surfaces. The cost is a `WebService` whose registry/status/exec methods come in `Search`/`Fetch` pairs; that parallelism is intentional, not a missed extraction. Splitting into `dsh-search` and `dsh-fetch` is the rejected alternative below.
+Search and fetch are separate capabilities and separate model-facing tools, but they are deliberately one seam. `ctx.web` is a single web-access middle layer between provider packages on one side and the tool consumer on the other: one service to inject, one provider-selection policy owner, one abort/error vocabulary, one place a product configures "how this harness reaches the web." The two halves do not share a request schema and have no shared business logic — search normalizes provider-backed discovery into a portable result with optional answer text and citeable sources, while fetch retrieves a concrete public HTTP(S) URL and returns a status code plus bounded decoded content — but they are parallel registries on one capability surface, not two surfaces. The cost is a `WebService` whose registry/exec methods come in `Search`/`Fetch` pairs; that parallelism is intentional, not a missed extraction. Splitting into `dsh-search` and `dsh-fetch` is the rejected alternative below.
 
 `dsh-tool-web` should register model-facing web tools when the product has enabled those tools and the `ctx.web` seam is present. Backend availability is an execution-time concern, not a schema-registration concern:
 
@@ -33,11 +33,11 @@ Search and fetch are separate capabilities and separate model-facing tools, but
 
 This keeps the model schema stable without making plugin load order, credential state, or HMR timing part of the model-facing contract. If web search is enabled but no usable search provider exists, `web_search` remains visible and execution fails with a structured `WebError` such as `WEB_PROVIDER_UNAVAILABLE` or `WEB_PROVIDER_CONFIGURED_UNAVAILABLE`. If a provider appears after `dsh-tool-web`, the next execution can use it without changing the schema. If a provider disappears mid-call, execution fails with a structured `WebError` instead of silently choosing another provider or falling through to `UNKNOWN_TOOL`.
 
-The first version's provider-change signal is intentionally small. `web/providers-change` has no payload, carries no capability graph, and does not expose provider metadata. It means only "the provider registry changed; observers may recompute status from `ctx.web`." `searchStatus()` and `fetchStatus()` remain derived, not stored, and they are diagnostics plus execution-resolution inputs rather than tool-schema visibility switches.
+The seam deliberately exposes no observation surface — no registry-change event and no aggregated capability-status query. Unavailability is a fact a caller observes by executing: `search()`/`fetch()` resolve the provider at call time and throw the structured `WebError` that names what failed. [The observation-surface RFC](../simplification/2026-07-04-drop-unconsumed-web-observation-surface.md) records that judgment: derived-on-call selection and enablement-based registration leave no consumer that needs a change signal or an availability probe distinct from executing and routing the error, and a future provider-status panel reintroduces the smallest signal or query it actually consumes.
 
 ## Package topology
 
-The three-package interface/implementation/consumer split follows bash and filesystem, but the *interface* package is closer to the LLM seam. `LlmService` (`packages/llm/llm/src/index.ts`) is a name-keyed provider registry: `registerAdapter(models, adapter)` stores adapters in a `Map`, returns a disposer, throws `DUPLICATE_ADAPTER` on duplicate keys, and throws `NO_ADAPTER` at resolution time. `ctx.web` follows that registry shape, but has two capability kinds and one small selection-status layer so diagnostics and execution can explain why a search or fetch capability can or cannot run.
+The three-package interface/implementation/consumer split follows bash and filesystem, but the *interface* package is closer to the LLM seam. `LlmService` (`packages/llm/llm/src/index.ts`) is a name-keyed provider registry: `registerAdapter(models, adapter)` stores adapters in a `Map`, returns a disposer, throws `DUPLICATE_ADAPTER` on duplicate keys, and throws `NO_ADAPTER` at resolution time. `ctx.web` follows that registry shape, but has two capability kinds and a richer selection policy (a configured provider id, or auto-select when exactly one usable provider is registered), so the `WebError` an execution throws can explain why a search or fetch capability cannot run.
 
 The dependency direction mirrors bash and filesystem:
 
@@ -52,7 +52,7 @@ The dependency direction mirrors bash and filesystem:
                                                                                   implementation
 ```
 
-At runtime, provider packages register capabilities with `ctx.web`; `tool-web` reads capability status and registers stable tools with `ctx.tools`:
+At runtime, provider packages register capabilities with `ctx.web`; `tool-web` registers stable tools with `ctx.tools` and executes through the seam:
 
 ```mermaid
 flowchart LR
@@ -60,12 +60,12 @@ flowchart LR
   perplexity["@deepseek-ai/dsh-web-search-perplexity"] -->|registerSearchProvider| web
   deepseek["@deepseek-ai/dsh-web-search-deepseek"] -->|registerSearchProvider| web
   fetchLocal["@deepseek-ai/dsh-web-fetch-local"] -->|registerFetchProvider| web
-  toolWeb["@deepseek-ai/dsh-tool-web"] -->|searchStatus/fetchStatus| web
+  toolWeb["@deepseek-ai/dsh-tool-web"] -->|search/fetch| web
   toolWeb -->|ctx.tools.register| webSearch["tool: web_search"]
   toolWeb -->|ctx.tools.register| webFetch["tool: web_fetch"]
 ```
 
-`@deepseek-ai/dsh-web` depends only on Cordis and low-level harness support. It declares `ctx.web`, provider interfaces, request/result types, status types, and error codes. It does not import tool, agent, session, LLM, or provider packages.
+`@deepseek-ai/dsh-web` depends only on Cordis and low-level harness support. It declares `ctx.web`, provider interfaces, request/result types, the provider status type, and error codes. It does not import tool, agent, session, LLM, or provider packages.
 
 Provider packages depend on `@deepseek-ai/dsh-web` and Cordis. They own credentials, endpoint config, provider-specific request mapping, provider-specific response parsing, and provider-specific error translation into `WebError`. They issue network requests with the platform-native `fetch` (Node 24), mirroring `@deepseek-ai/dsh-llm-deepseek`'s adapter, NOT a cordis HTTP-client service (`ctx.http`/`@cordisjs/plugin-http`) — even where a Perplexity provider's request is shaped like an OpenAI-compatible chat completion, that wire shape is a provider-private detail and does not make the provider depend on `ctx.llm`. A provider does NOT own the `ctx.web` key (two search providers cannot both own it): like `dsh-llm-deepseek`, each provider package is a function/namespace plugin (`inject: ['web']`) whose `apply` constructs the backend and calls `ctx.web.registerSearchProvider` / `registerFetchProvider`. `@deepseek-ai/dsh-web` is the `export default` service that owns the key.
 
@@ -92,9 +92,6 @@ interface WebService {
   registerSearchProvider(provider: WebSearchProvider): () => void
   registerFetchProvider(provider: WebFetchProvider): () => void
 
-  searchStatus(): WebCapabilityStatus
-  fetchStatus(): WebCapabilityStatus
-
   search(request: WebSearchRequest, exec?: WebExecContext): Promise<WebSearchResult>
   fetch(request: WebFetchRequest, exec?: WebExecContext): Promise<WebFetchResult>
 }
@@ -106,39 +103,33 @@ interface WebExecContext {
 
 `WebExecContext` is execution control, not business input. The first version should carry only `signal` so `tool-web` can propagate turn cancellation, tool timeout, and agent disposal into provider network requests, SSE readers, and expensive decoding. It should not pass `ToolExecution` through the seam, because that would make `dsh-web` depend on `dsh-tools`.
 
-`@deepseek-ai/dsh-web` should also declare a Cordis event named `web/providers-change`. Provider ids are stable strings and unique within their capability kind. Registering a duplicate search provider id or duplicate fetch provider id should fail rather than silently replace the old provider. Provider registration returns a disposer, emits `web/providers-change` after successful registration, and emits it again when the provider is disposed. The registry should follow the existing `ctx.tools.register()` / `ctx.systemPrompt.section()` pattern: wrap the mutation in `ctx.effect()`, install the rollback disposer before emitting `web/providers-change`, and let a throwing registration-time change listener roll back the just-added provider instead of leaking it into the registry.
+Provider ids are stable strings and unique within their capability kind. Registering a duplicate search provider id or duplicate fetch provider id should fail rather than silently replace the old provider. Provider registration returns a disposer and follows the existing `ctx.tools.register()` / `ctx.systemPrompt.section()` pattern: wrap the mutation in `ctx.effect()` so the registration is torn down with the contributing fiber.
 
 ## Provider status and selection
 
-Provider status and capability selection are separate concepts, but both stay minimal. A provider reports only whether that concrete implementation is usable by cheap local checks such as credential presence or parseable endpoint config. A provider `status()` must not make network calls. The service reports whether the capability has a selected usable provider, or why execution would fail.
-
-`LlmService` has no status type at all: availability is expressed as registry membership plus a resolution-time throw. `ctx.web` needs a small status answer because product apps, diagnostics, tests, and execution can report precise provider-selection failures without probing individual providers from the tool layer. Status must be derived from the configured provider id, registered providers, and each provider's cheap local `status()` on each call; it must not be stored as mutable service state.
+Provider status and capability selection are separate concepts, but both stay minimal. A provider reports only whether that concrete implementation is usable by cheap local checks such as credential presence or parseable endpoint config. A provider `status()` must not make network calls.
 
-`WebCapabilityStatus` stays intentionally small: `available` plus a `reason` discriminant, and the selected `providerId` on the available branch so diagnostics can report which provider won. It does NOT carry the per-reason payload (the unavailable provider id, the ambiguous candidate set, the underlying provider-unavailable reason). That branchable detail lives in the structured `WebError` thrown at execution time, which is the surface callers route on; duplicating it into the status union would give the same fact two homes that can disagree. `searchStatus()` / `fetchStatus()` answer "can this capability run, and if not, in which broad category does it fail" — enough for startup diagnostics and the execution-resolution decision — and the thrown error answers "exactly which provider/ids/reason."
+`LlmService` has no status type at all: availability is expressed as registry membership plus a resolution-time throw. `ctx.web` follows the same discipline. The seam exposes no aggregated capability-status query — `search()` / `fetch()` derive the selection on each call from the configured provider id, the registered providers, and each provider's cheap local `status()`, and a selection failure is the structured `WebError` thrown at execution time, whose code answers "in which broad category does this capability fail" and whose message answers "exactly which provider/ids/reason." A caller that needs to know whether a capability can run executes and routes that error; nothing is stored as mutable service state.
 
-`WebProviderStatus` is an input to selection, not a health system. `tool-web` reads only the aggregated `searchStatus()` / `fetchStatus()`, never each provider's `status()` directly, so selection policy has one owner.
+`WebProviderStatus` is an input to selection, not a health system. `tool-web` never calls a provider's `status()` directly — its only path into the seam is `search()` / `fetch()` — so selection policy has one owner.
 
 ```ts
 type WebProviderStatus =
   | { readonly available: true }
   | { readonly available: false; readonly reason: 'missing-credential' | 'misconfigured' }
-
-type WebCapabilityStatus =
-  | { readonly available: true; readonly providerId: string }
-  | { readonly available: false; readonly reason: 'none' | 'configured-missing' | 'configured-unavailable' | 'ambiguous' }
 ```
 
 Selection must not depend on registration order. Cordis load order, config ordering, and HMR timing are not product semantics.
 
-| Situation | Status / behavior |
+| Situation | Execution behavior |
 |---|---|
-| A configured provider id is registered and `status().available === true` | `available: true` for that provider |
-| A configured provider id is not registered | `configured-missing`; execution fails with `WEB_PROVIDER_CONFIGURED_MISSING` |
-| A configured provider id is registered but unavailable | `configured-unavailable`; execution fails with `WEB_PROVIDER_CONFIGURED_UNAVAILABLE` |
-| No provider id is configured and exactly one provider for that kind is registered and available | `available: true` for that single provider |
-| No provider id is configured and no provider for that kind is registered | `none`; execution fails with `WEB_PROVIDER_UNAVAILABLE` |
-| No provider id is configured and multiple usable providers for that kind are registered | `ambiguous`; execution fails with `WEB_PROVIDER_AMBIGUOUS` rather than choosing by registration order |
-| No provider id is configured and providers exist but none are usable | `none`; execution fails with `WEB_PROVIDER_UNAVAILABLE` |
+| A configured provider id is registered and `status().available === true` | runs that provider |
+| A configured provider id is not registered | fails with `WEB_PROVIDER_CONFIGURED_MISSING` |
+| A configured provider id is registered but unavailable | fails with `WEB_PROVIDER_CONFIGURED_UNAVAILABLE` |
+| No provider id is configured and exactly one provider for that kind is registered and available | runs that single provider |
+| No provider id is configured and no provider for that kind is registered | fails with `WEB_PROVIDER_UNAVAILABLE` |
+| No provider id is configured and multiple usable providers for that kind are registered | fails with `WEB_PROVIDER_AMBIGUOUS` rather than choosing by registration order |
+| No provider id is configured and providers exist but none are usable | fails with `WEB_PROVIDER_UNAVAILABLE` |
 
 The "single provider auto-selects" rule is for tests, demos, and simple deployments. Product configs should set explicit provider ids:
 
@@ -167,7 +158,7 @@ The "single provider auto-selects" rule is for tests, demos, and simple deployme
 
 Operational overrides such as environment variables may exist, but they must feed the same explicit selection path. For example, `DSH_WEB_SEARCH_PROVIDER=perplexity` is equivalent to config `searchProvider: perplexity`; it is not a hidden priority chain inside `dsh-tool-web`.
 
-`ctx.web.search()` and `ctx.web.fetch()` resolve the provider at execution time using the same rules as the status query. If the selected capability is unavailable, they throw `WebError` with a structured code such as `WEB_PROVIDER_UNAVAILABLE`, `WEB_PROVIDER_CONFIGURED_MISSING`, `WEB_PROVIDER_CONFIGURED_UNAVAILABLE`, or `WEB_PROVIDER_AMBIGUOUS`. If no provider is explicitly configured and no usable provider exists, the status and execution error are both the generic `none` / `WEB_PROVIDER_UNAVAILABLE` case; the first version should not add a diagnostic summary of every unavailable provider.
+`ctx.web.search()` and `ctx.web.fetch()` resolve the provider at execution time using the selection rules above. If the selected capability is unavailable, they throw `WebError` with a structured code such as `WEB_PROVIDER_UNAVAILABLE`, `WEB_PROVIDER_CONFIGURED_MISSING`, `WEB_PROVIDER_CONFIGURED_UNAVAILABLE`, or `WEB_PROVIDER_AMBIGUOUS`. If no provider is explicitly configured and no usable provider exists, the execution error is the generic `WEB_PROVIDER_UNAVAILABLE` case; the first version should not add a diagnostic summary of every unavailable provider.
 
 ## Search request and result schema
 
@@ -175,7 +166,7 @@ The first `web_search` model-facing tool should be small. The only model-facing
 
 - `query`: required string.
 
-`max_results` is NOT exposed to the model in the first version. It is a `dsh-tool-web`-layer decision: the tool sets the result bound — a default of `8` (aligning with OpenCode's Exa default), as an exported constant mirroring `dsh-tool-fs`'s `READ_LIMIT` / `GREP_LIMIT` — and passes it to the seam as `maxResults` on the `WebSearchRequest`. Keeping it off the model schema means the model just asks a question and the product controls how much context comes back; the field can be promoted to a model-facing argument later without breaking the seam.
+`max_results` is NOT exposed to the model in the first version. It is a `dsh-tool-web`-layer decision: the tool sets the result bound — the `searchMaxResults` plugin config, default `8` (aligning with OpenCode's Exa default), mirroring `dsh-tool-fs`'s `readLimit` — and passes it to the seam as `maxResults` on the `WebSearchRequest`. Keeping it off the model schema means the model just asks a question and the product controls how much context comes back; the field can be promoted to a model-facing argument later without breaking the seam.
 
 `maxResults` flows tool → seam → provider, and the bound is enforced on the way back:
 
@@ -269,14 +260,14 @@ SSRF / private-network protection (blocking private, loopback, link-local, multi
 
 `dsh-tool-web` owns two `ToolDefinition`s: `web_search` and `web_fetch`. It owns model-facing JSON schemas, snake_case argument names, prompt sections, result rendering to `ContentBlock[]`, `presentCall`, and `presentResult`.
 
-`dsh-tool-web` must not enumerate providers or call provider `status()` directly. Its execution path is `ctx.web.search()` / `ctx.web.fetch()`, and any optional startup diagnostics should read only `ctx.web.searchStatus()` / `ctx.web.fetchStatus()`. That keeps provider selection in one layer; otherwise the tool package could decide one provider is usable while execution resolves a different state.
+`dsh-tool-web` must not enumerate providers or call provider `status()` directly. Its only path into the seam is `ctx.web.search()` / `ctx.web.fetch()`. That keeps provider selection in one layer; otherwise the tool package could decide one provider is usable while execution resolves a different state.
 
 Tool registration in the first version is a minimal stable sync:
 
 1. On plugin startup, read the `dsh-tool-web` `Config` (`search?: boolean`, `fetch?: boolean`, both default `true`) that enables or disables each web tool.
 2. If web search is enabled, register `web_search` (its disposer is fiber-scoped via the effect-based registry).
 3. If web fetch is enabled, register `web_fetch` (likewise fiber-scoped).
-4. Do not dispose either tool merely because `ctx.web.searchStatus()` or `ctx.web.fetchStatus()` is unavailable.
+4. Do not dispose either tool merely because its selected provider is missing, unusable, or ambiguous.
 5. Disposing the `tool-web` fiber tears down its registrations automatically.
 
 Provider status changes affect execution results and diagnostics, not whether the model-facing schema exists. If a product wants no web tools at all, it disables `dsh-tool-web` or the individual web tool in config; if it wants web tools but the backend is misconfigured, the model sees a structured tool error at execution time.
@@ -311,7 +302,7 @@ Tool execution should let these errors flow through `ToolRegistry.execute()`, wh
 
 Tests should prove the seam contract without turning this RFC into an implementation checklist.
 
-`dsh-web` tests cover provider registration and disposal, duplicate provider ids, `web/providers-change` emission, rollback when a registration-time `web/providers-change` listener throws, `searchStatus()` and `fetchStatus()` for the selection table above, execution-time provider resolution, `maxResults` truncation of `sources[]` with `truncated` set when a provider over-returns, abort propagation through `WebExecContext.signal`, and structured `WebError` codes.
+`dsh-web` tests cover provider registration and disposal (proved through execution behavior — a registered provider serves `search()`/`fetch()`, a disposed one no longer resolves), duplicate provider ids, the selection table above exercised through execution-time provider resolution, `maxResults` truncation of `sources[]` with `truncated` set when a provider over-returns, abort propagation through `WebExecContext.signal`, and structured `WebError` codes.
 
 Search provider tests cover request mapping, response parsing into `content` plus `sources[]`, missing credentials, provider errors, timeout/abort, truncation, and a self-skipping with-key smoke test for each real provider. Perplexity fixtures must include URL-only citations so the optional source fields stay honest.
 
@@ -329,7 +320,7 @@ This is new capability work, so no compatibility migration is required while the
 
 Land the work in seam order:
 
-1. Add `packages/web/web` with `ctx.web`, provider registration, provider status, capability status, selection, request/result/error types, and contract tests.
+1. Add `packages/web/web` with `ctx.web`, provider registration, provider status, selection, request/result/error types, and contract tests.
 2. Add `packages/web/web-search-exa` with parser/unit tests and a self-skipping real-provider smoke test.
 3. Add `packages/web/web-search-perplexity` with parser/unit tests and a self-skipping real-provider smoke test.
 4. Add `packages/web/web-search-deepseek` with parser/unit tests and a self-skipping real-provider smoke test.
@@ -370,7 +361,7 @@ Rejected for the seam. `prompt` turns fetch into LLM summarization and couples p
 
 **Perplexity citations may be sparse.** A citation may be only a URL. Making `title` and `snippet` optional keeps the seam truthful but means `tool-web` must render useful fallback labels.
 
-**Stable tool registration can defer misconfiguration to execution.** Keeping the tool visible is correct when the product enabled web access, but product apps that expect web search should surface `configured-missing`, `configured-unavailable`, and `ambiguous` loudly during startup diagnostics so users do not discover setup problems only after the model calls the tool.
+**Stable tool registration can defer misconfiguration to execution.** Keeping the tool visible is correct when the product enabled web access, but product apps that expect web search should surface the structured `WEB_PROVIDER_CONFIGURED_MISSING` / `WEB_PROVIDER_CONFIGURED_UNAVAILABLE` / `WEB_PROVIDER_AMBIGUOUS` failures loudly so users do not discover setup problems only after the model calls the tool.
 
 **Provider state can change after startup.** A tool can be visible in the request assembled at step start and lose its provider before execution. The execution path must resolve again and fail with a structured error.
 
@@ -388,5 +379,5 @@ Rejected for the seam. `prompt` turns fetch into LLM summarization and couples p
 
 ## Open questions
 
-- Should product app packages treat `configured-missing`, `configured-unavailable`, and `ambiguous` as fatal startup errors when web is explicitly configured, or should `dsh-web` only report status and let apps decide?
+- Should product app packages probe web configuration at startup (treating `WEB_PROVIDER_CONFIGURED_MISSING`, `WEB_PROVIDER_CONFIGURED_UNAVAILABLE`, and `WEB_PROVIDER_AMBIGUOUS` as fatal when web is explicitly configured), or leave misconfiguration to surface at the first execution?
 - Where should permission policy for public web access live once the deferred permission system lands: a dedicated web permission plugin on `tools/execute`, provider config, or both?

docs/rfc/implemented/architecture/2026-06-30-event-domain-semantics.md

@@ -19,7 +19,7 @@ This is the foundational change in a stack that adds a Hooks subsystem; it estab
 **Three domains, one job each, with a single boundary rule.**
 
 - **`session/*` — the durable, replayable FACT log.** Owns `SessionEventMap`; every entry is JSON-only (no live objects). One `session/event` emit per append, plus the `session/flush` parallel durability checkpoint. It is also the live transcript feed: a consumer that wants to render or react to what happened subscribes here, so live rendering and `session/load` replay share one path.
-- **`agent/*` — the LIVE runtime surface.** Always carries the live `Agent`. Two shapes: INTERCEPTION waterfalls (`agent/request`, `agent/step-result`, `agent/turn-continuation`) that mutate or veto, and TRANSIENT emits (`agent/status`, `agent/error`, `agent/created`/`agent/disposed`, `agent/queued`, `agent/steering`) that notify with the `Agent` in hand. Turn and step BOUNDARIES are NOT here — they are durable session events read off `session/event`, and so is the token stream (`assistant/chunk`).
+- **`agent/*` — the LIVE runtime surface.** Always carries the live `Agent`. Two shapes: INTERCEPTION waterfalls (`agent/request`, `agent/step-result`, `agent/turn-continuation`) that mutate or veto, and TRANSIENT emits (`agent/status`, `agent/error`, `agent/created`/`agent/disposed`, `agent/queued`) that notify with the `Agent` in hand. Turn and step BOUNDARIES are NOT here — they are durable session events read off `session/event`, and so are the token stream (`assistant/chunk`) and mid-turn steering (`steering/message`).
 - **`tools/*` — the tool registry + execution seam.**
 
 **The boundary rule:** a durable, replayable fact is a `SessionEvent`; a live interception or a transient/live-object signal is an `agent`/`tools` Cordis event. A turn or step boundary is a durable fact, so it lives in the session log and is read off the `session/event` feed — it is NOT mirrored as an `agent/*` emit.
@@ -31,5 +31,5 @@ This is the foundational change in a stack that adds a Hooks subsystem; it estab
 - The loop no longer emits any boundary mirror; `closeStep` appends `step/end` only and `closeTurn` appends `turn/end` only. A throwing `step/end`/`turn/end` session-event listener is the surviving boundary-listener failure path (contained inside `closeStep`/`closeTurn` — `Session.append` pushes the event before notifying listeners, so the boundary is durable and the turn closes balanced regardless).
 - Tests that observed boundaries via the removed emits now observe the durable `turn/start`/`turn/end`/`step/start`/`step/end` session events — the behavior they pin (boundary ordering, step counting) is unchanged; only the feed they read moved to the canonical one. The tests that exercised a *throwing turn-boundary emit listener* were deleted, because that code path no longer exists (there is no emit to throw from). Per [AGENTS.md "tests document behavior, not golden truth"](../../../../AGENTS.md), the behavior and its test moved (or died) together.
 - The loop marks the step open (`stepOpen = true`) BEFORE appending `step/start`, because `Session.append` pushes the event to the log before notifying `session/event` listeners (validation throws happen earlier, before the push — see [the session append contract](../../../core-data-structures/session.md)). So a throwing `step/start` session-event listener runs with the step already open and the event already in the log: the loop's outer catch then calls `closeStep()`, which appends the balancing `step/end`, and the turn closes balanced with an error (`turn/start → step/start → step/end → turn/end` — verified by the invariants oracle in the regression test). Closing the open step is owed precisely because the marker is set first.
-- The full realization of this is [the simplification RFC "Stop mirroring durable boundaries as agent events"](../simplification/2026-06-20-remove-agent-boundary-mirror-events.md): all four boundary mirrors are removed and every consumer reads boundaries off `session/event`. `agent/steering` (a live control signal, not a boundary mirror) is retained; see that RFC's scope section.
+- The full realization of this is [the simplification RFC "Stop mirroring durable boundaries as agent events"](../simplification/2026-06-20-remove-agent-boundary-mirror-events.md): all four boundary mirrors are removed and every consumer reads boundaries off `session/event`. `agent/steering` (not a boundary mirror) stayed outside that RFC's scope and was removed by its own follow-up, [Remove the `agent/steering` mirror emit](../simplification/2026-07-04-remove-agent-steering-mirror.md) — it mirrored the durable `steering/message`.
 - The cordis catalog (`docs/cordis-catalog/events-and-services.md`) is regenerated to drop the mirror events.

docs/rfc/implemented/feature/2026-06-18-compaction-capability-seam.md

@@ -17,7 +17,7 @@ Two forces shape the design. First, compaction is **swappable**: token counting
 Per the [capability-seams RFC](../../implemented/architecture/2026-06-13-capability-seams.md), compaction ships as separate packages so the contract, the algorithm, and (later) the consumer surface evolve independently:
 
 1. **Interface** — `@deepseek-ai/dsh-compact`: an abstract `CompactService` owning the `ctx.compact` key, the `CompactionResult` vocabulary, and the `compact/*` session events. It declares `compactIfNeeded()` and `compactRegion()` as **abstract** — the contract states *what* compaction does, not *how*.
-2. **Implementation** — `@deepseek-ai/dsh-compact-basic`: a concrete `BasicCompactService` that owns the entire algorithm — token estimation (char/4 + per-block overhead), the tail→head retention walk, summarization via `ctx.llm.stream()`, the surface replacement, the lock, and the `agent/pre-step` auto-compaction listener. A tokenizer-based or template-based backend is a sibling package (or a subclass overriding the two protected estimation/summarization hooks).
+2. **Implementation** — `@deepseek-ai/dsh-compact-basic`: a concrete `BasicCompactService` that owns the entire algorithm — token estimation (chars per token — the `charsPerToken` config, default 4 — + per-block overhead), the tail→head retention walk, summarization via `ctx.llm.stream()`, the surface replacement, the lock, and the `agent/pre-step` auto-compaction listener. A tokenizer-based or template-based backend is a sibling package (or a subclass overriding the two protected estimation/summarization hooks).
 3. **Consumer** — deferred. A `/compact` tool and slash command will `inject: ['compact']` and call the contract; they are intentionally out of scope here so the seam settles first.
 
 ### The contract depends on `dsh-session` and `dsh-llm` — a deliberate deviation

docs/rfc/implemented/feature/2026-06-30-hook-protocol-lib.md

@@ -16,10 +16,10 @@ A new `packages/hooks/` group with `hook-protocol` as a pure library. It owns fo
 
 **Shared (here):**
 - **Matcher** — `matchesMatcher(pattern, query, mode)`. The ONE axis the dialects differ on is collapsed to the `mode` parameter: `claude` treats a pure `[A-Za-z0-9_|]+` pattern as a literal (pipe = exact-match alternation) and anything else as a regex; `codex` is always an unanchored regex. Match-all on absent/`''`/`'*'`; an invalid regex matches nothing (never throws into the loop).
-- **Execution** — `runHook(bash, hook, options, now)`. Runs a command hook through the `ctx.bash` seam rather than a bespoke `spawn`: the executor already provides the scrubbed-but-overridable env, process-group kills, and timeout the protocol needs, and `dsh-bash`'s `stdin`/`env` fields (added in the bash-seam PR for exactly this) are the trusted-plugin surface an in-process bridge is allowed to use. It serializes the bridge-built payload to stdin (trailing newline iff CC), honors the hook's `timeoutSec`, and never throws (an executor rejection becomes a non-blocking-error `HookOutput`).
-- **Decode** — `parseHookOutput(exit, stdout, stderr)`, the exit-code + structured-stdout codec, producing a dialect-neutral `HookOutput`. Exit `0` → lenient JSON parse of stdout; exit `2` → blocking error with `stderr` as the reason (surfaced as `decision: 'block'` so no caller needs a separate exit-code branch); other → non-blocking error. Parses the full CC superset (`continue`/`stopReason`/`suppressOutput`/`decision`/`hookSpecificOutput.{permissionDecision,additionalContext,updatedInput}`/`systemMessage`); the bridge honors only the subset meaningful for its dialect.
+- **Execution** — `runHook(bash, hook, options)`. Runs a command hook through the `ctx.bash` seam rather than a bespoke `spawn`: the executor already provides the scrubbed-but-overridable env, process-group kills, and timeout the protocol needs, and `dsh-bash`'s `stdin`/`env` fields (added for exactly this) are the trusted-plugin surface an in-process bridge is allowed to use. It serializes the bridge-built payload to stdin (trailing newline iff CC), honors the hook's `timeoutSec` (else `DEFAULT_HOOK_TIMEOUT_MS`, the 10-minute reference default both dialects share), and never throws (an executor rejection becomes a non-blocking-error `HookOutput`).
+- **Decode** — `parseHookOutput(exit, stdout, stderr)`, the exit-code + structured-stdout codec, producing a dialect-neutral `HookOutput`. Exit `0` → lenient JSON parse of stdout; exit `2` → blocking error with `stderr` as the reason (surfaced as `decision: 'block'` so no caller needs a separate exit-code branch); other → non-blocking error. Parses the CC structured-stdout fields that have a consumer on some path (`continue`/`stopReason`/`decision`/`hookSpecificOutput.{permissionDecision,additionalContext,updatedInput}`/`systemMessage`); the bridge honors only the subset meaningful for its dialect. Fields with no consumer on any path are not parsed at all (CC's `suppressOutput` — hook stdout never enters a transcript here, so there is nothing to suppress; see [the tighten-hook-protocol-contract RFC](../simplification/2026-07-04-tighten-hook-protocol-contract.md)).
 - **Merge** — `mergeHookOutputs(outputs)`, folding multiple matched hooks into one most-restrictive `MergedHookOutcome`: permission precedence **deny > ask > allow**, halt sticky on the first `continue:false`, block reasons joined `\n\n`, context/system-messages accumulated in order.
-- **`hook/*` session events** — `hook/invoked` / `hook/result`, declaration-merged into `SessionEventMap` (log-only, like `compact/*` — NOT `SurfaceEventType`s), with `appendHookInvoked`/`appendHookResult` helpers so the invoked/result pairing and turn-enclosure stay consistent across bridges.
+- **`hook/*` session events** — `hook/invoked` / `hook/result`, declaration-merged into `SessionEventMap` (log-only, like `compact/*` — NOT `SurfaceEventType`s), with `appendHookInvoked`/`appendHookResult` helpers so the invoked/result pairing and turn-enclosure stay consistent across bridges. `appendHookResult` also owns the durable record's semantics — the decision string (the hook's parsed decision, else `'stop'` on `continue:false`, else `'pass'`) and the 500-character `stderrSummary` truncation derive from the `HookOutput` here, not per-bridge.
 
 **Per-dialect (the bridge plugins):** building each event's stdin payload (CC's base+per-event field sets vs Codex's snake_case with `turn_id`/`model` extras), the dialect's env + `${CLAUDE_PLUGIN_ROOT}` substitution (CC) vs none (Codex), and mapping the neutral `HookOutput`/`MergedHookOutcome` onto the harness's seam-specific typed Decisions (`PreToolDecision`, `PromptDecision`, `ContinuationDecision`, `PostToolDecision`).
 

docs/rfc/implemented/process/2026-06-20-rfc-classification.md

@@ -29,18 +29,18 @@ The `architecture` / `process` line: **architecture** is about the source we shi
 
 Both are `doc-sync` members, in the `verify-md-wrap` style (tsx ESM, verify-don't-generate, exit non-zero on the first violation):
 
-- **`scripts/verify-rfc-classification.ts`** — the closed set and index completeness. It asserts every file under a lifecycle folder lives in a class folder from the canonical set (a loose `.md` at a lifecycle root, or an unknown class folder, fails), and that `README.md` lists every RFC exactly once under the `###` heading matching its `{lifecycle}/{class}` path. The canonical class set lives as a `const` in this script — the machine source of truth — and [the index](../../README.md) documents it in prose; the two are kept in sync by hand (the README's completeness is gated, its class *descriptions* are not). This mirrors `verify-event-taxonomy`, which checks a doc table against source.
+- **`scripts/verify-rfc-classification.ts`** — the closed set and index freshness. It asserts every file under a lifecycle folder lives in a class folder from the canonical set (a loose `.md` at a lifecycle root, or an unknown class folder, fails), and that the README's marker-delimited index regions byte-match a fresh render from the tree (see [generate the RFC index tables](2026-07-04-generate-rfc-index-tables.md)). The canonical class set lives as a `const` in `scripts/rfc-index.ts` — the machine source of truth shared with the generator — and [the index](../../README.md) documents it in prose; the README's class *descriptions* stay hand-written, its tables are generated.
 - **`scripts/verify-doc-refs.ts`** — source comments that cite docs. RFC paths are referenced not only from Markdown but from TypeScript doc comments (root-relative prose like `docs/rfc/implemented/testing/2026-06-19-acp-snapshot-tests.md`). `verify-md-links` never saw those, so the reorg could have silently orphaned them. This gate scans repo-authored `.ts` under `packages/**` and `examples/**` (excluding built `lib/` and `vendor/`) for `docs/….md` tokens, resolves each root-relative, and asserts it exists. It requires the `.md` extension so extensionless prose (`docs/postmortem/0001`, `docs/architecture.md § plugin checklist`) is left alone.
 
 ### Rejected alternatives
 
 - **A `Classification:` prose line** in each file (next to `Status:`), parsed by the gate. Workable, but it duplicates into the file a fact the path can already carry, and a line can disagree with its folder. Path-encoding makes the label and its storage the same thing — there is nothing to keep in sync.
 - **A `refactor` class.** It overlaps `simplification` almost entirely; the only discriminator anyone reached for was "does observable behavior change?", which `simplification` already encodes (it does not). One class, not two.
-- **Auto-generating the README index** from the filesystem. Rejected to keep the index hand-written like every other doc here; the completeness gate gives the same drift-protection without generated Markdown in a curated file.
+- **Auto-generating the README index** from the filesystem. Rejected here to keep the index hand-written; superseded by [generate the RFC index tables](2026-07-04-generate-rfc-index-tables.md) once stacked proposal waves made the hand-written tables the repo's most conflict-prone docs region — the tables are now generated between markers while the surrounding prose stays curated.
 
 ## Consequences
 
 - Every RFC now sits under a class folder, and the index groups by class within each lifecycle. A reader scans one heading to see all simplifications, or all testing decisions.
 - Two more fast tsx scripts in the `doc-sync` chain; no new dependency (the mdast/GFM stack was already present for `verify-md-wrap`/`verify-md-links`).
-- Adding a class is a deliberate act: amend the `const` in `verify-rfc-classification.ts` and the [Classification section](../../README.md#classification), not just `mkdir` a folder. The gate rejects an unknown folder, so an ad-hoc class can't slip in.
+- Adding a class is a deliberate act: amend the `const` in `scripts/rfc-index.ts` and the [Classification section](../../README.md#classification), not just `mkdir` a folder. The gate rejects an unknown folder, so an ad-hoc class can't slip in.
 - Source-comment doc references are now gated too — a moved or renamed doc that a `.ts` comment cites fails the pre-push hook, closing a drift class `verify-md-links` structurally could not see.

docs/rfc/implemented/process/2026-07-04-cordis-jsdoc-completeness-gate.md

@@ -0,0 +1,33 @@
+# RFC: JSDoc completeness gate for the cordis surface
+
+Status: implemented (accepted 2026-07-04)
+
+## Context
+
+The [generated cordis catalog](2026-06-20-generated-cordis-catalog.md) already walks every harness `interface Events` member and every `ctx.<key>` service class with the TypeScript compiler API, and already hard-errors on a missing `@mode` tag — a forcing function that made dispatch modes impossible to leave undocumented. Nothing equivalent guarded the rest of the JSDoc: a service method could ship with no doc at all, and no event or method documented its parameters or return value individually. A survey at adoption found 5 public service methods with no JSDoc and roughly 139 missing `@param`/`@returns` entries across 15 files — on the product API spine (`ctx.bash`, `ctx.fs`, `ctx.sessions`, …) and the cross-plugin event payload contracts, exactly the surface where "what does this argument mean" is the question a plugin author asks the IDE.
+
+The AGENTS.md rule ("every export has a JSDoc explaining semantics") is prose-checkable only by review; the repo's stated preference is to encode invariants in mechanical gates. The scope "cordis service functions and events" has a precise machine definition that only the catalog generator knows: events are the `interface Events` members inside `declare module 'cordis'`, and the service surface is the public methods of the class each `interface Context` key names. An ESLint rule cannot see that mapping; the generator computes it on every run.
+
+## Decision
+
+Extend `scripts/gen-cordis-catalog.ts` — the same walk, the same `@mode` precedent — to enforce JSDoc COMPLETENESS on everything it catalogs. `verify-cordis-catalog` runs inside `doc-sync`, which both CI and the lefthook pre-push hook already execute, so the gate needs zero new wiring (quality-gates principle: one source of truth).
+
+The contract:
+
+- **Events** need description prose plus a non-empty `@param` for every **payload parameter**. A payload parameter is a signature parameter that carries event data; the `this` receiver annotation and the trailing waterfall `next` are exempt — `next` is dispatch machinery whose semantics the `@mode waterfall` tag (and its structural cross-check) already owns, so restating it per event would be boilerplate. Documenting an exempt parameter anyway is allowed; only absence is checked.
+- **Service classes** need class-level JSDoc, and every public method needs description prose, a non-empty `@param` per parameter, and a non-empty `@returns` unless the annotated return type is `void`/`Promise<void>` (where `@returns` stays optional — resolution timing can be worth documenting — but is never required).
+- **Stale tags error**: an `@param` naming no real parameter is a violation, mirroring the `@mode`-contradicts-signature check. Tag descriptions must be non-empty; their semantic quality beyond that is review's job.
+- **Explicitness the walk can check**: the gate is a pure-AST pass (no type checker), so a service method must annotate its return type (an inferred return cannot be classified) and surface parameters must be simple identifiers (a binding pattern has no name for `@param` to match).
+- **Violations aggregate** into one error listing every offender — a remediation pass sees the whole list at once. The previously fail-fast `@mode` checks moved into the same aggregated report, with their message texts unchanged.
+
+The tags are **enforcement-only**: `parseJsDoc` now ends description prose at the first block tag (standard JSDoc semantics, which also stops multi-line tag descriptions from leaking into the catalog as prose), so `@param`/`@returns` never change the rendered catalog. Rendering them — restructuring the services section into per-method entries — was considered and deliberately deferred: source JSDoc plus IDE hover is where method docs are consumed, and the catalog stays an index. No escape-hatch tag exists; the surface is small and curated (12 services, 57 methods, 27 events at adoption), and the point is that the check cannot be waved off.
+
+Negative-path tests in `packages/core/agent/tests/gen-cordis-catalog.spec.ts` drive `collectEvents`/`collectServices` against synthetic fixtures to prove each guard fires and that the exemptions hold. The authoring rule lives in the root [AGENTS.md](../../../../AGENTS.md) conventions bullet alongside the `@mode` rule.
+
+## Consequences
+
+- A new event or service method cannot land with an undocumented parameter or result: the generator refuses to regenerate and `verify-cordis-catalog` fails pre-push and in CI. The ~139 gaps found at adoption were filled in the same change, so the gate landed green.
+- The service surface must annotate return types explicitly and use identifier parameters. Neither constraint bound at adoption (every method already annotated; no destructured seam parameters existed); both are now load-bearing requirements a violating change will discover mechanically.
+- The general AGENTS.md JSDoc rule ("one-liners when one line suffices") acquires a stricter carve-out on this surface: a one-line summary still suffices only when the method has no parameters and a void result.
+- `@param` on `next` or `this` stays legal but unchecked — a deliberate asymmetry: the gate enforces the payload contract and refuses to demand boilerplate.
+- The rendered catalog is unchanged by the tags (prose stops at the first block tag). If method-level rendering is wanted later, that is a catalog-design decision to take separately, not a gap in this gate.

docs/rfc/implemented/process/2026-07-04-generate-rfc-index-tables.md

@@ -0,0 +1,26 @@
+# RFC: Generate the RFC index tables
+
+Status: implemented
+
+## Problem
+
+`docs/rfc/README.md`'s per-lifecycle/per-class tables list facts that are fully derivable: an RFC's path encodes lifecycle and class, its filename encodes the first-proposed date, and its H1 carries the title. A hand-maintained copy of those facts is also the repo's highest-contention docs hotspot: every proposal wave appends rows to the same few lines, so concurrent RFC branches conflict precisely there while agreeing everywhere else, and each conflict is resolved by hand-merging rows whose content the filesystem already knows. [The classification RFC](2026-06-20-rfc-classification.md) originally kept the index hand-written for curation's sake — but the curated part of the README is the prose, and the prose never conflicts; only the mechanical tables do.
+
+## Decision
+
+Keep the curated prose; generate the tables. [`scripts/rfc-index.ts`](../../../../scripts/rfc-index.ts) is the shared source of truth — the tree walker (owning the closed lifecycle/class sets and the structure rules, including a parseable-H1 requirement) and the renderer (rows from H1 title with any `RFC: ` prefix stripped, plus the filename date, sorted by date then filename, grouped as `### {Class}` sections in canonical class order). Two thin consumers share it:
+
+- [`scripts/gen-rfc-index.ts`](../../../../scripts/gen-rfc-index.ts) (`pnpm run gen-rfc-index`) rewrites the three marker-delimited regions in the README (`<!-- gen-rfc-index:begin {lifecycle} -->` … `end`), one per `## {Lifecycle}` section, leaving everything outside the markers untouched.
+- [`scripts/verify-rfc-classification.ts`](../../../../scripts/verify-rfc-classification.ts) (a `doc-sync` member) checks structure and asserts the committed regions byte-match a fresh render — the `gen-cordis-catalog`/`verify-cordis-catalog` pattern. Freshness subsumes the index-completeness check: a generated-from-disk table is definitionally complete and correctly headed.
+
+Adding, moving, or deleting an RFC means editing only the RFC file and running the generator; the classification RFC's rejected-alternatives record carries the supersession cross-link.
+
+## Why not the verifier-only model?
+
+It catches mistakes but still makes every proposal edit a shared hotspot, and a failed verifier is strictly more annoying than a generator for a purely mechanical row: the author has already named and placed the file; the index copy adds no information. This is the same hand-list-versus-derivation judgment the [package-inventory proposal](../../proposed/process/2026-06-20-discover-package-inventory.md) applies to tsconfig references and knip stanzas — applied to the one list that demonstrably conflicts.
+
+## Consequences
+
+- The generated regions are explicit: marker comments make script ownership obvious to reviewers, and the generator refuses to run on a structurally invalid tree.
+- A malformed or missing H1 is a hard error in both the generator and the gate — the H1 is now load-bearing as the index title source.
+- Concurrent RFC branches resolve index conflicts by rerunning the generator, never by hand-merging rows.

docs/rfc/implemented/simplification/2026-06-20-remove-agent-boundary-mirror-events.md

@@ -5,10 +5,11 @@ Status: implemented (accepted 2026-07-01)
 <!-- Shipped in AMENDED, narrowed form: the four turn/step BOUNDARY mirrors are
      removed; `agent/steering` and `agent/stream-chunk` were RETAINED here (they
      are not durable-boundary mirrors — see "Scope: what is and isn't removed").
-     The original proposal bundled `agent/steering` into the removal; validating
-     against the code showed it is a distinct live-only signal, so it stayed.
-     `agent/stream-chunk` was later removed by its own decision — see
-     [Stop mirroring the token stream as an agent event](2026-07-02-remove-stream-chunk-mirror.md). -->
+     The original proposal bundled `agent/steering` into the removal; keeping it
+     out kept this RFC's scope to boundaries. Each retained event was later
+     removed by its own decision — see
+     [Stop mirroring the token stream as an agent event](2026-07-02-remove-stream-chunk-mirror.md)
+     and [Remove the `agent/steering` mirror emit](2026-07-04-remove-agent-steering-mirror.md). -->
 
 ## Problem
 
@@ -30,7 +31,7 @@ Removed (durable-boundary mirrors — the session log is authoritative for each)
 
 RETAINED — NOT durable-boundary mirrors, so out of scope for this decision:
 
-- `agent/steering` — a live control signal, not a boundary. (The original proposal bundled it into the removal; validating against the code, it is not a duplicate of a durable boundary, so removing it here would have been scope creep. Its fate is a separate future decision.)
+- `agent/steering` — not a boundary, so out of scope for THIS decision (the original proposal bundled it into the removal; that would have been scope creep here). It mirrors the durable `steering/message` control record rather than a boundary, and was removed by its own follow-up: [Remove the `agent/steering` mirror emit](2026-07-04-remove-agent-steering-mirror.md).
 - `agent/stream-chunk` — the live token stream. Out of scope for THIS decision (a mirror of the durable `assistant/chunk`, not a boundary), it was removed by its own follow-up: [Stop mirroring the token stream as an agent event](2026-07-02-remove-stream-chunk-mirror.md).
 - `agent/created`, `agent/disposed`, `agent/status`, `agent/error`, `agent/queued` — lifecycle/control events that are not transcript data. `agent/queued` in particular is an inbox acknowledgement that fires before any durable event exists (cancelled queued work may never enter the log), so it is deliberately live-only.
 

docs/rfc/implemented/simplification/2026-07-02-remove-stream-chunk-mirror.md

@@ -33,7 +33,7 @@ Removed: `agent/stream-chunk`.
 
 Not touched:
 - `assistant/chunk` (the durable session event) — the authoritative token stream, kept exactly as-is. This RFC removes the LIVE MIRROR, not the persistence (the persistence-removal proposal was separately rejected — see above).
-- `agent/steering` — a live control signal with no durable twin, retained (its fate remains a separate future decision, per the boundary RFC).
+- `agent/steering` — not touched by THIS decision (a control signal, not the token stream). Its durable twin is `steering/message`, and the mirror emit was removed by its own follow-up: [Remove the `agent/steering` mirror emit](2026-07-04-remove-agent-steering-mirror.md).
 - `agent/status`, `agent/error`, `agent/created`/`agent/disposed`, `agent/queued`, `agent/session-start` — lifecycle/control events that are not transcript data and have no durable duplicate.
 
 ## What we give up

docs/rfc/implemented/simplification/2026-07-04-drop-image-content-block.md

@@ -0,0 +1,27 @@
+# RFC: Drop the `image` content block until a path can honor it
+
+Status: implemented (proposed and accepted 2026-07-04)
+
+## Problem
+
+`ImageBlock` (`packages/llm/llm/src/types.ts`) had no production producer, and every consumer on every path DROPPED it: the deepseek adapter's serializer skipped image blocks (a documented MVP limitation), the pi-ai converter skipped them as unrepresentable, the ACP codec neither advertises image prompt capability nor forwarded image blocks outbound and REJECTS image prompt content inbound, and the compaction estimator charged a flat token constant and rendered `[image]`. An `ImageBlock` constructed then would silently vanish from the wire — the vocabulary advertised a capability no path honored, which is the silent-data-loss shape AGENTS.md's defensive patterns warn against. The only constructors anywhere were tests pinning the skip/drop/estimate branches.
+
+## Decision
+
+Remove `ImageBlock`, its `ContentBlockMap` entry (and its `cache?: CacheHint` field with it), the explicit `image` estimate/placeholder arms in compact-basic, and the image-naming comments in the deepseek serializer's, pi-ai converter's, and ACP codec's default arms — those default arms absorb the case the way they absorb any unknown block type. Updated in the same change: the vocabulary line in [architecture.md](../../../architecture.md), the block list in `packages/llm/llm/README.md`, the deepseek README's image-skip row, the pi-ai README's images-not-representable row, the compact-basic README's image-estimation and `[image]`-placeholder rows, the pastes in [core.md](../../../core-data-structures/core.md) and [llm-streaming.md](../../../core-data-structures/llm-streaming.md), and the [content-block vocabulary RFC](../architecture/2026-06-11-content-block-vocabulary.md)'s block list and multimodal-home consequence per [implemented/AGENTS.md](../AGENTS.md); the tests that constructed image blocks to exercise the removed branches were dropped (the estimate pin) or retargeted onto the merge-extensible default arms (plugin-added block types). The ACP codec's inbound rejection of image PROMPT content is unaffected — that guard is about protocol content a client can send regardless of our vocabulary, and it stays.
+
+## Why not keep it?
+
+This was the most contested cut in the batch. Multimodal input (screenshots) is a plausible near-term coding-agent feature, and the [content-block vocabulary RFC](../architecture/2026-06-11-content-block-vocabulary.md) reserved the slot deliberately. Two responses. First, `ContentBlockMap` is merge-extensible by design: a real multimodal feature reintroduces `image` in core in the same coordinated change that maps it in the adapters, advertises and renders it in ACP, and prices it in compaction — the producer and its consumers arrive together, which is how the map is meant to grow. Second, the middle option — keep the type but make adapters throw UNSUPPORTED instead of silently dropping — converts this into exactly the shape the sibling request-knobs proposal (`2026-07-04-drop-inert-request-knobs`) argues against: surface whose only implementation is rejection. Absence (a compile error at the would-be producer) is strictly clearer than either silent loss or universal throw.
+
+The recorded fallback, had review landed on keeping the slot: keep `ImageBlock` but replace every silent skip with a loud rejection, and document that policy in the vocabulary — the silent drop was the one state with no defender. Review landed on removal; the fallback stands as the documented alternative should the slot ever return ahead of a full feature.
+
+## Acceptance criteria
+
+- No `ImageBlock` / harness `type: 'image'` block construction outside this RFC; the codec's inbound ACP-image rejection still passes its tests.
+- Adapter/codec/compaction switches handle the case through their unknown-block default arms (pinned by the plugin-added-block tests).
+- Doc pastes, the manifest, and the architecture vocabulary list updated; `pnpm run doc-sync` green.
+
+## Risks
+
+Re-adding a core vocabulary type later touches several packages at once — but that coordinated change is the shape a real multimodal feature needs anyway (adapter mapping, ACP advertisement, compaction pricing), and none of it existed to preserve.

docs/rfc/implemented/simplification/2026-07-04-drop-inert-request-knobs.md

@@ -0,0 +1,33 @@
+# RFC: Drop `GenerateOptions.prefill` and `ToolSchema.strict` — request knobs with no working end-to-end path
+
+Status: implemented (proposed and accepted 2026-07-04)
+
+## Problem
+
+Two request-contract knobs rode the whole request pipeline, yet neither could do anything:
+
+- **`prefill`** (`packages/llm/llm/src/types.ts`) had no production setter — the loop assembles `model`/`system`/`tools`/`messages` plus `sessionId`/`signal`, and the compaction backend adds only `maxTokens` — and BOTH adapters rejected it: `packages/llm/llm-deepseek/src/serialize.ts` and `packages/llm/llm-pi-ai/src/adapter.ts` each threw `LlmError('UNSUPPORTED')` on a non-undefined `prefill`. The field's entire observable behavior was two throws, each pinned by one adapter test. DeepSeek's chat-prefix completion is a Beta feature on a base URL neither adapter targets.
+- **`strict`** (`ToolSchema`, same file) was threaded through `DefineToolOptions`/`defineTool` (`packages/core/tools/src/schema.ts`), the registry's `schemas()` allowlist (`packages/core/tools/src/index.ts`), the deepseek wire mapping (`packages/llm/llm-deepseek/src/serialize.ts`, whose wire-type note recorded that strict mode requires the `/beta` base URL the adapter does not use), a per-tool payload-patching pass in `packages/llm/llm-pi-ai/src/adapter.ts`, and a conditional `Strict:` row in the tool-catalog renderer (`scripts/gen-tool-catalog.ts`). No shipped tool set it — `rg` across every `tool-*` package src and `examples/` found zero `strict:` producers; the only setters were dsh-tools unit tests.
+
+Both knobs were adapter-symmetric, so removal shed them from both twins together — the [twin-adapter design](../architecture/2026-06-13-twin-llm-adapters.md) is untouched.
+
+## Decision
+
+- `prefill` is removed from `GenerateOptions`, along with both adapters' UNSUPPORTED guards, the tests pinning the throws, the paste line in [core.md](../../../core-data-structures/core.md), and the adapter README rows documenting the rejection. The cookbook's UNSUPPORTED guidance ([adding-an-llm-adapter.md](../../../cookbook/adding-an-llm-adapter.md)) states the rule generically — a `GenerateOptions` field your provider cannot honor throws `LlmError(..., 'UNSUPPORTED')` — instead of using prefill as the example. The [content-block vocabulary RFC](../architecture/2026-06-11-content-block-vocabulary.md)'s consequences record prefill as producer-gated rather than as having a home, per [implemented/AGENTS.md](../AGENTS.md).
+- `strict` is removed from `ToolSchema`, `DefineToolOptions`, `defineTool`, the `schemas()` allowlist, the deepseek serializer branch and its wire-type field, and the tool-catalog renderer's `Strict:` row. The pi-ai payload fixup is simplified to the unconditional scrub of pi-ai's own per-tool strict default (pi-ai stamps `strict: false` on every serialized tool; the hand-rolled twin sends no such field, so the scrub survives for wire parity, pinned by its serializer test). The setter tests and the core.md paste line are gone; both `GenerateOptions` and `ToolSchema` keep their rows in `scripts/type-equiv.manifest.json`, since each type survives minus a field.
+
+This RFC deliberately does NOT touch `temperature`, `stop`, or `maxTokens`: those are honored end-to-end by both adapters and are the natural first targets of a request-mutating hook plugin on `agent/request`.
+
+## Why not keep them?
+
+"An explicit UNSUPPORTED throw is honest contract behavior" — but a knob whose only implementation across both twins is rejection promises nothing, and deleting it upgrades the failure mode: an accidental setter becomes a compile error instead of a runtime throw. "Strict schema adherence is an officially documented provider feature with complete plumbing" — but a knob is not product surface until a shipped tool sets it AND an endpoint honors it; today neither is true. Each returns with its first real producer: `prefill` together with an adapter that implements chat-prefix completion (and a stated policy for adapters that do not), `strict` together with a tool that wants it and a beta-endpoint story.
+
+## Acceptance criteria
+
+- `rg prefill` returns only RFC records (this one and the [content-block vocabulary RFC](../architecture/2026-06-11-content-block-vocabulary.md)'s producer-gated consequence); a tool-schema-scoped `rg strict` returns only this RFC, the surviving pi-ai scrub, and unrelated prose such as `strictEqual`.
+- Both adapters compile and their contract tests pass without the guards; the pi-ai fixup still scrubs the library's strict default (wire parity pinned by its serializer tests).
+- Doc pastes and the type-equiv manifest in sync; `pnpm run doc-sync` green.
+
+## Risks
+
+The shipped hook bridges set no request fields at all, and a request-mutating plugin (an `agent/request` waterfall listener) would reach for `temperature`/`stop` (kept, working), not a field adapters reject. If chat-prefix completion or strict mode become product features, the re-add lands with the adapter/endpoint work, where the contract can say what actually happens rather than "everyone throws".

docs/rfc/proposed/simplification/2026-07-04-drop-unconsumed-web-observation-surface.md → docs/rfc/implemented/simplification/2026-07-04-drop-unconsumed-web-observation-surface.md

@@ -1,13 +1,13 @@
 # RFC: Drop the unconsumed web observation surface — the `providers-change` event and the status methods
 
-Status: proposed
+Status: implemented (proposed and accepted 2026-07-04)
 
 ## Problem
 
 `WebService` exposes an observation surface no production code observes:
 
 - **`web/providers-change`** (`packages/web/web/src/index.ts`) is declared and emitted on every provider registration and disposal, and each registration effect's rollback yield is ordered BEFORE the emit solely so a throwing change listener unwinds the registration. No listener exists outside the package's own two unit tests (one of which exists to pin that rollback ordering).
-- **`searchStatus()` / `fetchStatus()` and the `WebCapabilityStatus` union** (same package) have zero production callers: `dsh-tool-web` executes directly through `ctx.web.search()`/`fetch()` and surfaces unavailability as the structured `WebError` codes the seam throws at execution time (`packages/web/tool-web/src/search.ts`, `packages/web/tool-web/src/fetch.ts`); the only status callers are the web packages' own tests. The prose in `packages/web/tool-web/README.md` and [architecture.md](../../../architecture.md) still claims the tool "reads only the aggregated `searchStatus()`/`fetchStatus()`" — drift that survives only because nothing checks prose against call sites.
+- **`searchStatus()` / `fetchStatus()` and the `WebCapabilityStatus` union** (same package) have zero production callers: `dsh-tool-web` executes directly through `ctx.web.search()`/`fetch()` and surfaces unavailability as the structured `WebError` codes the seam throws at execution time (`packages/web/tool-web/src/search.ts`, `packages/web/tool-web/src/fetch.ts`); the only status callers are the web packages' own tests. The prose in `packages/web/tool-web/README.md` and [architecture.md](../../../architecture.md) claims the tool "reads only the aggregated `searchStatus()`/`fetchStatus()`" — drift that survives only because nothing checks prose against call sites.
 
 The seam's own design starves both surfaces of consumers: tool registration follows product ENABLEMENT, not provider availability (`packages/web/tool-web/src/index.ts`), and provider selection resolves at execution time, never cached — so there is no cache to invalidate, no registration set to recompute, and no caller that needs an availability probe distinct from executing and routing the structured error. HMR cleanup is carried by the effect disposers themselves.
 
@@ -15,7 +15,7 @@ This mirrors [drop the unconsumed `llm/adapter-change` event](../../implemented/
 
 ## Proposal
 
-Delete the event declaration, both emits, and the rollback-before-emit ordering (the plain `ctx.effect` disposer keeps HMR cleanup). Delete `searchStatus()`/`fetchStatus()`/`WebCapabilityStatus` — the provider-private `status()` stays, since it feeds execution-time selection. Delete the two event tests and rewrite the status-based test assertions onto the behavior a real caller observes (a successful `search()`/`fetch()`, or the structured `WebError` codes for unavailable/ambiguous/misconfigured provider sets). Run `pnpm run gen-cordis-catalog`; update `packages/web/web/README.md`, `packages/web/tool-web/README.md` (the drifted reads-status sentence), [web.md](../../../core-data-structures/web.md), and the web paragraph in [architecture.md](../../../architecture.md). The implementing PR amends the [web capability seam RFC](../../implemented/architecture/2026-06-24-web-capability-seam.md)'s facts (it specifies the event and the status aggregation) per [implemented/AGENTS.md](../../implemented/AGENTS.md).
+Delete the event declaration, both emits, and the rollback-before-emit ordering (the plain `ctx.effect` disposer keeps HMR cleanup). Delete `searchStatus()`/`fetchStatus()`/`WebCapabilityStatus` — the provider-private `status()` stays, since it feeds execution-time selection. Delete the listener-throw rollback test that exists solely for the removed event, and rewrite the emission assertions and every status-based assertion onto the behavior a real caller observes (a successful `search()`/`fetch()`, or the structured `WebError` codes for unavailable/ambiguous/misconfigured provider sets). Run `pnpm run gen-cordis-catalog`; update `packages/web/web/README.md`, `packages/web/tool-web/README.md` (the drifted reads-status sentence), [web.md](../../../core-data-structures/web.md), and the web paragraph in [architecture.md](../../../architecture.md). Amend the [web capability seam RFC](../../implemented/architecture/2026-06-24-web-capability-seam.md)'s facts (it specified the event and the status aggregation) per [implemented/AGENTS.md](../AGENTS.md).
 
 ## Why not keep it?
 

docs/rfc/implemented/simplification/2026-07-04-fold-stdio-ui-helper.md

@@ -0,0 +1,24 @@
+# RFC: Fold the stdio UI helper into the stdio app
+
+Status: implemented
+
+## Problem
+
+The readline UI was a whole package (`@deepseek-ai/dsh-ui-stdio` under `packages/support/`) whose only runtime importer was the app package `@deepseek-ai/dsh-stdio-agent`. The examples reach the readline UI by loading the app, never by composing the helper themselves; every other repo reference was mechanical or descriptive surface that existed BECAUSE the package boundary existed — manifest and tsconfig entries, generated module-graph rows, dependency-graph and README rows, and doc comments naming the package. The ui group README recorded the support placement rationale ("exists chiefly for the examples and the coverage gate — `ui/` is reserved for surfaces shipped as product"), which left a standing tension: a shipped product app depending on a support package documented as NOT product surface.
+
+The boundary bought package metadata, workspace and tsconfig references, module-graph rows, README entries, and publint surface for a helper that is not independently swappable: the stdio app's front-door cluster always includes the readline UI, and nothing else can meaningfully consume it.
+
+## Decision
+
+The helper lives inside `@deepseek-ai/dsh-stdio-agent` as the in-package `stdio-chat` module (`packages/ui/stdio-agent/src/stdio-chat.ts`): `createStdioChat`, its `StdioRuntime` test seam, and its unit tests (`packages/ui/stdio-agent/tests/stdio-chat.spec.ts`, `readline.spec.ts`) moved with it, so EOF handling, rendering, disposal, and piped-vs-TTY behavior stay unit-covered under the per-file coverage gate without hijacking process globals. The module keeps the named `name`/`inject`/`Config`/`apply` export shape — the contract the app's `ctx.plugin(uiStdio, …)` mount consumes — and the keyless Loader-path smokes in `examples/echo-agent` and `examples/coding-agent` keep proving the composed tree boots through the real Loader (the app's export SHAPE is pinned by the stdio-agent unit suite's explicit `unwrapExports` assertion, since a bundle without `inject` would boot past a stray default rather than crash).
+
+The `packages/support/ui-stdio` package is gone: manifest, tsconfig references, module-graph rows, and README rows deleted; the doc comments that named the package (the example e2e module docs, `packages/README.md`, the support and todo READMEs, [the ui group README](../../../../packages/ui/README.md)) describe the in-package module.
+
+## Why not promote it to `ui/` instead?
+
+Promotion would have resolved the support-vs-product mismatch while keeping the boundary — the right call only if the readline UI were an independently swappable integration or had a second composer, and the consumer census said neither. The structured ACP bridge stays its own package because it is the product protocol surface with its own contract and snapshot tiers; the readline helper is scaffolding for one app's front door. Re-extraction stays cheap pre-release: if a second product app wants the readline UI, split it back out then, with that consumer shaping the package contract.
+
+## Consequences
+
+- The stdio app owns its whole front door; a leaf `cordis.yml` still loads one app package and nothing changed shape for the demos.
+- A future standalone terminal UI that wants the helper as a package reintroduces it with that second consumer, rather than the repo keeping a boundary for hypothetical reuse.

docs/rfc/implemented/simplification/2026-07-04-prune-producerless-vocabulary-variants.md

@@ -0,0 +1,31 @@
+# RFC: Prune producer-less vocabulary variants (block cache hints, the `agent` message source, the `continuation` turn trigger)
+
+Status: implemented (proposed and accepted 2026-07-04)
+
+## Problem
+
+The merge-extensible vocabulary maps are designed to grow by declaration merging, and the codebase already states the admission policy on `TurnEndReasonMap` (`packages/core/session/src/types.ts`): a variant like `refusal` is "deliberately omitted until" an adapter or loop first emits it. Three declared vocabulary items violated that policy — each had no producer and no consumer, and two had not even a test:
+
+- **`CacheHint` and its `cache?: CacheHint` block fields** on `TextBlock`/`ToolResultBlock` (`packages/llm/llm/src/types.ts`; the image block carried a third such field, which left with it — see [the drop-image RFC](2026-07-04-drop-image-content-block.md)). Nothing constructed a block with `cache:` anywhere — src, tests, and doc pastes all came up empty — and neither adapter read `.cache`: DeepSeek prompt caching is automatic, so the adapters map `prompt_cache_hit_tokens` OUT of responses without ever sending a hint IN. This was Anthropic-style `cache_control` surface with no provider that could honor it.
+- **`MessageSourceMap.agent`** (`{ kind: 'agent'; agentId: string }`, same file). Zero constructors, tests included. Its intended producer shipped without it: the subagent backends send the parent's prompt to the child with no `source`, so it logs as `{ kind: 'user' }`, and the generic envelope renderer interpolates `source.kind` without ever routing on it.
+- **`TurnTriggerMap.continuation`** (`packages/core/session/src/types.ts`). The loop structurally cannot emit it — continuation happens *within* a turn as further steps, never as a new turn — and it constructs only `message` and `injection` triggers. The only writer was one hand-built test fixture needing an arbitrary non-message trigger (`packages/support/llm-replay/tests/llm-replay.spec.ts`), which an `injection` trigger serves equally; the only production trigger reader, the ACP bridge, filters on `kind === 'message'`.
+
+## Decision
+
+`CacheHint`, its `cache?` block fields, the `agent` message-source variant, and the `continuation` turn-trigger variant are deleted: the shipped vocabulary carries none of them. The llm-replay fixture uses an `injection` trigger (any non-`message` trigger serves its purpose). The type-equiv pastes in [core.md](../../../core-data-structures/core.md) and [session.md](../../../core-data-structures/session.md) match the pruned maps — both symbols keep their rows in `scripts/type-equiv.manifest.json`, since each map survives minus a member — and the [content-block vocabulary RFC](../architecture/2026-06-11-content-block-vocabulary.md)'s consequences record cache hints as producer-gated rather than as having a home, per [implemented/AGENTS.md](../AGENTS.md).
+
+Each variant returns the day it gains a real producer, exactly as the maps are designed to grow: a caching feature re-adds `cache` together with the adapter that transmits it; subagent attribution re-adds `agent` together with the backend that stamps it and a consumer that routes on it; an auto-continue feature that genuinely starts new turns re-adds `continuation` with the plugin that emits it.
+
+## Why not keep them?
+
+The [content-block vocabulary RFC](../architecture/2026-06-11-content-block-vocabulary.md) listed "cache hints … have a home" as a design consequence, and reserved slots do advertise intent. But an empty slot is contract surface every implementation and consumer must consider (must my adapter honor `cache`? must my renderer route `agent` sources?), and the sibling map's own JSDoc already rejects reservation-without-emitter — `refusal` and `max_turn_requests` are named as variants to add *when something first emits them*, not declared in advance. Holding already-declared dead variants to the same standard makes the vocabulary mean something: if it is in the map, something produces it.
+
+## Acceptance criteria
+
+- `rg` for `CacheHint`, the `agent` message-source spelling, and the `continuation` trigger spelling returns only RFC records (this one, and [the drop-image RFC](2026-07-04-drop-image-content-block.md)'s account of the image block's own `cache` field).
+- The core-data-structures pastes and the type-equiv manifest are in sync (`pnpm run doc-sync` green).
+- The fixture asserts the same replay behavior with an `injection` trigger; the suite is green.
+
+## Risks
+
+None operational — nothing could construct these values. The mirror-event removals (recorded in [the boundary-mirror RFC](2026-06-20-remove-agent-boundary-mirror-events.md) and [the stream-chunk RFC](2026-07-02-remove-stream-chunk-mirror.md)) touch only transient `agent/*` events, never the durable vocabulary, so there is no collision. Elsewhere in the vocabulary the admission policy already holds: `rejected`, `prompt/blocked`, and `hook/invoked`/`hook/result` each have live producers — this RFC extends the same bar to the three variants that lacked one. The image block's own `cache?` field belongs to [the drop-image RFC](2026-07-04-drop-image-content-block.md), which removed it together with the block; this RFC covers the two fields on the block types that remain.

docs/rfc/implemented/simplification/2026-07-04-prune-write-only-fs-surface.md

@@ -0,0 +1,29 @@
+# RFC: Prune write-only fields and a dead routing knob from the fs seam
+
+Status: implemented (proposed and accepted 2026-07-04)
+
+## Problem
+
+The [fs seam split](2026-06-26-fsspec-style-fs-seam.md) moved read routing and policy out of the backend into `dsh-tool-fs` and `dsh-fs-policy`. Four pieces of surface kept the pre-split shape — populated on every call, read by nobody:
+
+1. **`STREAM_MIN_SIZE` + `FsIoInternals.streamMinSize` in `dsh-fs-local`** — *removed ahead of this change by the no-hardcoded-tunables audit, which made the routing bound `dsh-tool-fs`'s `readStreamMinSize` config; recorded here as part of the full prune.* Originally (`packages/fs/fs-local/src/fsio.ts`, re-exported from `packages/fs/fs-local/src/index.ts`): zero readers anywhere, including fs-local's own source and tests. The backend has no read routing — `readWholeText`/`streamWholeText` are separate primitives the caller chooses between — and the real routing constant lives in the consumer (`packages/fs/tool-fs/src/read.ts`, compared against `info.size`). Two mirrors of the 10 MiB fact; the backend's was dead, and the knob's JSDoc claimed a "read routing" override that did not exist.
+2. **`FsTarget.inputPath`** (`packages/fs/fs/src/types.ts`): every backend and every test fake had to fabricate a "diagnostics only" value with zero production readers — the policy plugin and every error message use `targetKey`/`displayPath`. The `listDir` producer exposed the semantic wobble: directory children got the bare entry name, which was nobody's "input".
+3. **`FsEditOutcome.replacements` + `.replaceAll`** (`packages/fs/fs/src/types.ts`): `replacements` had zero production readers (the single-match policy itself stays — it is enforced by the `FS_AMBIGUOUS_EDIT`/`FS_EDIT_NOT_FOUND` throws inside the backend, whose error message keeps the internal count); `replaceAll` was read only by `formatEditOutput` in `packages/fs/tool-fs/src/edit.ts` — as an echo of the `replace_all` argument the tool already holds. Shrunk, `FsEditOutcome` is `{ version, before, after }`, parallel to `FsWriteOutcome`'s genuinely backend-discovered fields.
+4. **`FileReadOutcome.limit` + `.version`** (`packages/fs/tool-fs/src/read-render.ts`): populated by the read tool, but `formatReadOutput` renders `offset`/`lines`/`totalLines`/`truncatedByBytes` only, and the `fs/observed` emit uses `info.version` directly rather than an outcome copy.
+
+## Decision
+
+Delete the fs-local constant, its re-export, and the `streamMinSize` knob (the remaining `FsIoInternals` knobs are genuinely used by the atomic-write tests); drop `inputPath` from `FsTarget`; shrink `FsEditOutcome` to `{ version, before, after }` and pass `replaceAll` to `formatEditOutput` from the parsed args; drop `limit`/`version` from `FileReadOutcome`. The [filesystem.md](../../../core-data-structures/filesystem.md) pastes, `packages/fs/fs/README.md`, and the test fakes that had to fabricate the removed fields shrink with the types.
+
+## Why not keep them?
+
+A future permission/containment layer might want the pre-resolution path for error text — but it would want the *request*, which every call site still holds. "N occurrences replaced" might become model-facing text — a behavior change to design when wanted, and the backend-internal count survives for its error message. A read footer might display `limit` — everything the footer shows already derives from `lines`/`totalLines`. Meanwhile every current and future backend (remote, native) would have to fabricate wire fields nobody consumes, and every test fake would have to satisfy them.
+
+## Acceptance criteria
+
+- The removed surfaces are gone — `STREAM_MIN_SIZE`/`streamMinSize` in `dsh-fs-local`, `FsTarget.inputPath`, `FsEditOutcome.replacements`/`.replaceAll`, and `FileReadOutcome.limit`/`.version` — while the request-side `replaceAll` (`FsEditRequest`) and the version fields on the other outcome types are untouched; doc pastes and the manifest in sync; the suite is green with the shrunk fakes.
+- `formatEditOutput`'s emitted text is unchanged for both `replace_all` branches, so no snapshot golden churns.
+
+## Risks
+
+The in-flight fs discovery work (glob/grep tools) touches the same `dsh-fs` type files — a textual, not design, conflict; land in either order and reconcile mechanically. Backends gain no new obligations; they shed four.

docs/rfc/implemented/simplification/2026-07-04-remove-agent-steering-mirror.md

@@ -0,0 +1,30 @@
+# RFC: Remove the `agent/steering` mirror emit
+
+Status: implemented (accepted 2026-07-04)
+
+## Problem
+
+`agent/steering` was the last remaining transient mirror of a durable session event. The loop's steering drain appends the durable `steering/message { turn, content, source }` and, on the very next line, emitted `agent/steering(agent, turn, content, source)` — the identical fact as a fire-and-forget event (`packages/core/agent-loop/src/loop.ts`, `drainSteering`). It had zero production listeners: the only subscriber anywhere was a loop regression test asserting the emit carried `source` — the same fact the durable event already records one line above.
+
+Both mirror-removal RFCs retained it while explicitly deferring the decision this RFC makes. The [boundary-mirror removal](2026-06-20-remove-agent-boundary-mirror-events.md) kept it as a live control signal rather than a boundary; the [stream-chunk removal](2026-07-02-remove-stream-chunk-mirror.md) retained it on the reading that it had no durable twin. The second rationale did not survive the code: the durable twin is `steering/message`, appended immediately before the emit with the same payload. The mirrored-vs-live-only line the taxonomy actually draws puts it on the mirror side: `agent/queued` is genuinely live-only (it fires at enqueue time, before any durable event exists, and already carries a `steering: boolean` flag — cancelled queued work never enters the log), while `agent/steering` fired at the exact moment its durable twin landed, carrying nothing the log does not.
+
+Steering carries real production traffic — the hook bridges' turn-continuation decisions inject their reasons through `inbox.steer()`, landing as durable `steering/message` events that the hook-matrix goldens pin — and every one of those consumers observes the durable event. Nothing observed the mirror.
+
+## Decision
+
+`agent/steering` is removed from the agent event taxonomy: the declaration in `packages/core/agent/src/types.ts` (and its mention in the live-events JSDoc list there), the emit in `drainSteering` (whose then-unused `ctx` parameter went with it), the row in `packages/core/agent/README.md`, and the emit line in the loop-pseudocode blocks (the `packages/core/agent-loop/src/loop.ts` module doc and [architecture.md](../../../architecture.md)); the cordis catalog is regenerated without it. The one regression test pins source preservation on the durable `steering/message` event — the fact it pins lives on the log.
+
+Three implemented RFCs stated the retention, and each is amended per [implemented/AGENTS.md](../AGENTS.md) to point here as the record of the removal: the [boundary RFC](2026-06-20-remove-agent-boundary-mirror-events.md)'s retained-list entry, the [stream-chunk RFC](2026-07-02-remove-stream-chunk-mirror.md)'s scope clause, and the [event-domain-semantics RFC](../architecture/2026-06-30-event-domain-semantics.md)'s transient-emit enumeration.
+
+## Why not keep it?
+
+"It is a control signal, not a boundary" — but the taxonomy's operative distinction is mirrored-vs-live-only, not control-vs-boundary, and this event mirrored. A consumer that wants enqueue-time notification has `agent/queued` (with its steering flag); a consumer that wants drain-time notification is by definition asking for the moment `steering/message` is appended, which `session/event` delivers with the same payload plus durability. The rejected [retire-mid-turn-steering RFC](../../rejected/simplification/2026-06-20-retire-mid-turn-steering.md) defended the steering *capability* — `steer()`, the durable event, continuation forcing — all of which this removal keeps untouched.
+
+## Acceptance criteria
+
+- The `agent/steering` spelling survives only in RFC prose (this RFC, the three amended RFCs above, and the frozen [rejected steering-capability RFC](../../rejected/simplification/2026-06-20-retire-mid-turn-steering.md), whose text records the proposal it declined); the catalog is regenerated and fresh.
+- The retargeted test pins source preservation on `steering/message`; the suite is green.
+
+## Risks
+
+None known: zero production listeners existed to migrate, and both live-notification needs (enqueue, drain) have surviving homes (`agent/queued`, `session/event`).

docs/rfc/implemented/simplification/2026-07-04-share-app-bin-boot-glue.md

@@ -0,0 +1,23 @@
+# RFC: Share the app bins' boot glue instead of maintaining twin copies
+
+Status: implemented
+
+## Problem
+
+`packages/ui/stdio-agent/src/bin.ts` and `packages/ui/acp-agent/src/bin.ts` carried four near-twin helpers — `loadEnv`, `installFailLoud`, `assertEntriesLoaded`, `boot` — whose bodies differed essentially in the diagnostic prefix, plus two copies of the hardest-won boot lore in the repo: the `Promise.allSettled` swallow inside `loader.await()`, the silent-exit-0 import-failure guard, and the `--expose-internals` resolution note. The copies had drifted (`boot(configPath)` resolved the path internally in one bin but required a pre-resolved absolute path in the other, with forked JSDoc prose), and all of it sat outside the per-file 100% gate — `vitest.config.ts` excludes `packages/*/*/src/bin.ts` because importing a self-executing bin runs it — which also made the helpers' `export` keywords decorative: no spec could import them, so the only exercisers were subprocess smokes.
+
+## Decision
+
+The helpers live once, in [`@deepseek-ai/dsh-app-boot`](../../../../packages/ui/app-boot) (`packages/ui/app-boot`, in the `ui` group because the bins are published artifacts whose runtime dependency must itself be published, not `support/`): `resolveConfigPath` (snapshot-aware, the single path resolver for both bins), `loadEnv`, `installFailLoud`, `assertEntriesLoaded`, and `boot`, each parameterized by the bin's diagnostic prefix and injectable at its side-effect seams (the warn sink, the process slice) so the unit suite covers every branch — including `boot()` driven in-process against the real Loader with relative-specifier configs, both the settled-tree happy path and the fiber-less-entry rejection. The package carries the per-file 100% coverage gate; the loader-failure lore has one home.
+
+Each `bin.ts` is a thin self-executing composition over the shared helpers plus its app-specific lifecycle (the ACP bin: replay-mode env skipping and the stdin-EOF dispose; the stdio bin: nothing extra). The bins stay coverage-excluded and export nothing; the published-artifact guards are unchanged — the built-bin smokes still run each bin under plain node in a node_modules-shaped temp dir (now symlinking `ui/app-boot` too) and still assert the missing-config non-zero exit, per the "real entry path means the published artifact" defensive pattern. The [extract-example-app-packages RFC](../architecture/2026-06-20-extract-example-app-packages.md)'s bin-ownership facts are amended accordingly.
+
+## Why not keep the duplication?
+
+The bins were framed as independently-owned published artifacts, and a new package carries fixed overhead (manifest, README, tsconfig reference, publint surface) comparable to the deduplicated line count. But app-vs-app sharing was never weighed by the RFC that created the bins — it consolidated three example `start.ts` copies INTO the bins and stopped there; the drift was observed fact; and the coverage-gap argument is independent of the dedup argument: this was the only nontrivial runtime logic in the repo exempt from the per-file 100% gate. The recorded fallback (extracting only the pure logic into per-app modules) would have ended the exemption but kept two homes for the lore.
+
+## Consequences
+
+- A boot-glue change (a new guard, a resolution fix) lands once and both published bins inherit it; the bins cannot drift apart again.
+- `dsh-app-boot` stays dependency-light (cordis + the loader/include pair) — it is boot machinery, not app surface.
+- The bins' own files are near-trivial compositions; everything with branches lives under the coverage gate.

docs/rfc/implemented/simplification/2026-07-04-tighten-hook-protocol-contract.md

@@ -0,0 +1,31 @@
+# RFC: Tighten the hook-protocol contract — dialect, discarded fields, double defaults, and lib-owned `hook/result` semantics
+
+Status: implemented (proposed and accepted 2026-07-04)
+
+## Problem
+
+Four pieces of the `dsh-hook-protocol`/bridge contract missed the discipline the [subagent-observe-enrich RFC](../feature/2026-06-30-subagent-observe-enrich.md) records — it dropped an `agentType` lifecycle field for lacking a consumer, and these failed the same test:
+
+1. **`HookDialect`'s `'native'` variant** (`packages/hooks/hook-protocol/src/types.ts`) had zero producers — the bridges stamp `'claude'` and `'codex'`; the only `'native'` constructor anywhere was the lib's own unit test. The field's own JSDoc defines `dialect` as "the bridge that ran it", and native is not a bridge: the [interception-seams RFC](../feature/2026-06-30-interception-seams.md) records that native hooks are not a package and that "a native plugin can already use the typed Decisions" without the durable hook log, and the flagship native-plugin worked example asserts exactly that (no `hook/*` events at all).
+2. **`HookOutput.suppressOutput`** (same file) was parsed by the codec and discarded on every path: no bridge branch, no merge fold, no warn, no deferred-list row — uniquely among its parsed-but-unhonored siblings, each of which carries a stated deferral (`updatedInput` → a logged warn plus the [pre-tool-input-rewrite proposal](../../proposed/feature/2026-06-30-pre-tool-input-rewrite.md); `systemMessage` → a logged warn plus a README deferred row; `continue`/`stopReason` → a `TODO(hook-continue-false)` anchor plus the `'stop'` decision record). Structurally there is nothing to suppress: hook stdout never enters any transcript (context flows only via `additionalContext`; the log records only `decision`/`stderrSummary`), so a hook author setting `suppressOutput: true` got silent nothing with no warn.
+3. **`defaultTimeoutMs` was double-defaulted in both bridge configs with a floating literal** — a schema `.default(600_000)` AND a `?? 600_000` fallback (`packages/hooks/hooks-claude/src/index.ts`, `packages/hooks/hooks-codex/src/index.ts`), two homes per bridge for one protocol-level constant, so the bridges could silently drift apart on the shared default. *The proposal's original remedy — delete the knob outright — was overtaken by the no-hardcoded-tunables audit, which kept the knob as the explicit bridge-owned config (and added `stderrSummaryMaxChars` beside it); what remained to fix was the literal's home.*
+4. **The `hook/result` semantics lived in the bridges, twice, not in the lib that owns the event.** `summarize()` — the stderr truncation rule — was byte-identical in `packages/hooks/hooks-claude/src/index.ts` and `packages/hooks/hooks-codex/src/index.ts`, and so was the decision-string rule `output.decision ?? (output.continue === false ? 'stop' : 'pass')`; yet `dsh-hook-protocol` declared `hook/result`, documented `stderrSummary` as "truncated" without owning the truncation, and documented the decision values without owning the mapping. If one bridge drifted (a different cap, a different fallback), the shared durable event's semantics would fork silently.
+
+## What shipped
+
+`HookDialect` is `'claude' | 'codex'`, its JSDoc names the two bridges, and the lib's unit test constructs a `'codex'` invocation. `suppressOutput` is gone from `HookOutput`, the codec's parse, the codec tests, and the parsed-superset lists in the lib README and the [hook-protocol-lib RFC](../feature/2026-06-30-hook-protocol-lib.md) (amended per [implemented/AGENTS.md](../AGENTS.md)). `hook/result.durationMs` stays: review judged wall-clock hook runtime worth its bytes as durable audit timing (which hook made a turn slow), so `runHook` keeps its injected `now` clock and `RunHookResult` wrapper, the bridges keep passing the measured duration through `HookResultRecord`, and the snapshot normalizer keeps scrubbing the one nondeterministic field to `0` for replay. On the tunables, the no-hardcoded-tunables audit set the shape this change keeps: `defaultTimeoutMs` and `stderrSummaryMaxChars` stay explicit bridge configs, and `RunHookOptions.defaultTimeoutMs` stays a required parameter the bridge passes in. What this change adds is one home per literal: the reference defaults live in the lib as `DEFAULT_HOOK_TIMEOUT_MS` (600 000 ms, exported from the runner) and `DEFAULT_STDERR_SUMMARY_MAX_CHARS` (500, exported from the events module), and both bridges' schema defaults and `??` fallbacks read those constants instead of restating the numbers. The `hook/result` semantics live in the lib: `HookResultRecord` carries the decoded `HookOutput` plus the bridge's `stderrSummaryMaxChars`, and `appendHookResult` derives `stderrSummary` (via the exported `summarizeStderr(stderr, maxChars)`) and the decision string from them; both bridges deleted their private copies, and the derived values are byte-identical to what the bridges wrote (the goldens prove it — their only diff is the dropped `durationMs`). Rider: `BLOCKING_EXIT_CODE` is a codec-internal const, no longer exported (it had zero importers; even the codec tests spell the literal `2`).
+
+## Why not keep them?
+
+The [hook-protocol-lib RFC](../feature/2026-06-30-hook-protocol-lib.md) deliberately recorded "parses the full CC superset" — the strongest counterargument was that this proposal re-litigates decisions that RFC records. But parsing a field whose value can never influence anything is not protocol faithfulness, it is a reader trap; a dialect variant that the design's own thesis says will never be stamped is vocabulary without an interpreter; Each returns trivially with its first real consumer (a transcript surface with hook stdout to suppress; a native-provenance feature that logs hook events). On `durationMs` the review reached the opposite verdict: a persistence log is written for future readers, and wall-clock hook timing is audit signal worth carrying before a reader exists — so it stays, with replay normalization as the accepted cost. On item 4, the lib RFC chose per-bridge explicitness over a parameterized engine — but that choice governed payload construction and Decision mapping; the semantics of the SHARED durable event are precisely the "primitives where duplication would actually be dangerous" that the same RFC assigns to the lib.
+
+## Acceptance criteria
+
+- `HookDialect` is two-valued; `rg "'native'"` in the hooks packages returns nothing.
+- `suppressOutput` appears nowhere in source, parsed-field doc lists, or the normalizer; `durationMs` stays on `hook/result` (and in the fixtures), with the normalizer's replay scrub intact.
+- Both bridge configs keep `defaultTimeoutMs`/`stderrSummaryMaxChars` (the audit's explicit-tunables shape), but the literals `600_000` and `500` each live once, in the lib's `DEFAULT_HOOK_TIMEOUT_MS`/`DEFAULT_STDERR_SUMMARY_MAX_CHARS`; per-hook `timeoutSec` still overrides the timeout.
+- One definition each of the truncation rule and the decision-string rule, in `dsh-hook-protocol`'s `appendHookResult`, exercised by both bridges' suites.
+
+## Risks
+
+The `dialect`, `suppressOutput`, tunables, and semantics changes are invisible on the wire and in the goldens. The cost was churn in `dsh-hook-protocol` and both bridges — cheap under the pre-release stance, and cheaper than letting two copies of a durable event's semantics age apart.

docs/rfc/implemented/simplification/2026-07-04-trim-acp-bridge-unreachable-surface.md

@@ -0,0 +1,22 @@
+# RFC: Trim unreachable ACP bridge surface — the branding knobs and the kind-sniffing fallback
+
+Status: implemented (accepted 2026-07-04)
+
+## Problem
+
+Two pieces of `dsh-acp` surface were unreachable from any shipped configuration:
+
+1. **`AcpConfig.agentName` / `agentVersion`** (`packages/ui/acp/src/index.ts`). The shipped app package hands the bridge only `{ model, systemPrompt }` (`packages/ui/acp-agent/src/index.ts`), so no leaf `cordis.yml` — the only production config surface — could set the knobs at all; they were settable solely by direct-mounting the bridge, which only a unit test did. Every snapshot golden — the hook-matrix scenarios included — pins the schema defaults (`deepseek-harness-acp` / `0.0.1`). The pair also carried a live `TODO(double-default)`: the literals existed twice (schema `.default(...)` plus `??` fallbacks), with the TODO asking to pick one home.
+2. **The `toolKindFor` name heuristic** (same file) special-cased `bash*`/`read*`/`write`/`edit*` tool names in the generic-fallback path. Since the [render-intent union](../architecture/2026-07-02-tool-render-intent-union.md), every first-party tool those arms matched ships its own `presentCall` carrying its kind, and the presenter-less production tools (`subagent`, `subagent_fork`) fell through to `other` anyway. The arms were production-reachable only when a tool declined to present its own call — a `presentCall` that THROWS (the containment fallback), or model arguments that fail the tool's schema so `defineTool`'s `presentCall` wrapper returns `undefined` (e.g. a `bash` call missing the required `description`) — and the bridge's own module doc states the design rule the heuristic violated: "the bridge never special-cases tool names".
+
+## Decision
+
+`agentInfo` is hardcoded at the `initialize` site (`{ name: 'deepseek-harness-acp', version: '0.0.1' }`); the two config fields, their schema defaults, the `??` fallbacks, and the `TODO(double-default)` (whose subject vanished with them) are gone, along with the knob half of the direct-mount config test, the two config rows in `packages/ui/acp/README.md`, and the `packages/ui/acp/acp-feature-support.md` cells that described the knobs and the name inference. The emitted handshake wire value is unchanged — zero golden churn on the branding half. `toolKindFor` is replaced by the constant `'other'` at both fallback sites (the presenter fallback and `nullToolPresenter`), and the heuristic is deleted with its test rows. The fixed handshake identity stays pinned by the bridge's initialize unit test and by every snapshot golden. On the fallback half the transcript delta shows up in exactly one committed golden: `hook-codex-posttool-block`, whose recorded model omits the required `description` on three `bash` calls, so those cards take the declined-to-present fallback and carry `kind: 'other'` — the honest neutral card for a call the tool would not vouch for.
+
+## Why not keep them?
+
+`agentInfo` is client-visible branding a deployment will eventually want configurable — but a knob no shipped config can reach is not configurability, it is drift surface (the double-default TODO was its symptom), and the honest re-add must include the `dsh-acp-agent` plumb-through that does not exist either; both arrive together with the deployment that needs them. For the heuristic: a hypothetical third-party presenter-less tool named `read_docs` loses an inferred `read` icon — but inferring kinds from unknown plugins' names is exactly the special-casing the render-intent design rejected. The only shipped paths the heuristic reached were the declined-to-present fallbacks (a throwing `presentCall`, or schema-invalid model args); rendering kind `other` there makes the client show the raw input instead of a masquerading first-party card — strictly better diagnostics for a broken presenter or a malformed call.
+
+## Risks
+
+None beyond the fallback rendering trade described above — degenerate paths whose neutral card is more diagnosable than an inferred first-party one.

docs/rfc/implemented/testing/2026-06-19-acp-snapshot-tests.md

@@ -46,7 +46,7 @@ Replay is positional: the Nth `stream()` call serves the Nth `ReplayEntry`. This
 
 Recording runs the scenario with the real `llm-deepseek` adapter and the JSONL persistence backend, then copies the produced `.jsonl` into the scenario dir. Per-event appends are durable, but the harness shuts the subprocess down gracefully (close stdin → `await ctx.dispose()`) before harvesting so the final events are flushed. `llm-replay` itself does no recording — it is replay-only.
 
-The ACP server app loads `@deepseek-ai/dsh-llm-deepseek`, whose `apply` throws when no API key is present ([packages/llm/llm-deepseek/src/index.ts](../../../../packages/llm/llm-deepseek/src/index.ts)). So replay cannot reuse the normal config — it uses a dedicated `examples/acp-agent/cordis.snapshot.yml` that installs `llm-replay` in place of the adapter. The rest of the tree is not duplicated: both the normal `examples/acp-agent/cordis.yml` and the replay config load the same `@deepseek-ai/dsh-acp-agent` app entry (which bundles the agent-core spine + JSONL persistence + the ACP bridge), differing only in the LLM backend (`llm-deepseek` vs `llm-replay`) and the bash executor line. Recording reuses the normal `cordis.yml` (real adapter) — its persistence root reads `$DSH_SNAPSHOT_SESSIONS_ROOT` when the harness sets it — so there is no separate record config. The `dsh-acp-agent` bin selects `cordis.snapshot.yml` for `DSH_SNAPSHOT=replay` and skips `.env` loading in that mode so a stray key cannot trigger a live call.
+The ACP server app loads `@deepseek-ai/dsh-llm-deepseek`, whose `apply` throws when no API key is present ([packages/llm/llm-deepseek/src/index.ts](../../../../packages/llm/llm-deepseek/src/index.ts)). So replay cannot boot the normal config as-is — `examples/acp-agent/cordis.snapshot.yml` is an include-overlay of `cordis.yml` that disables the `llm-deepseek` entry by id and inserts `llm-replay` (see [single-source the acp-agent replay config](2026-07-04-single-source-acp-replay-config.md)); every other entry IS the live tree, loaded through the include. Recording reuses the normal `cordis.yml` (real adapter) — its persistence root reads `$DSH_SNAPSHOT_SESSIONS_ROOT` when the harness sets it — so there is no separate record config. The `dsh-acp-agent` bin selects `cordis.snapshot.yml` for `DSH_SNAPSHOT=replay` and skips `.env` loading in that mode so a stray key cannot trigger a live call.
 
 ### Two surfaces: normalize, then compare
 

docs/rfc/implemented/testing/2026-07-04-hook-snapshot-matrix.md

@@ -18,7 +18,7 @@ Two coupled changes, in one PR:
 
 It is safe because a bridge whose config file is absent is a **silent no-op**: `apply()` catches the read failure, logs through `ctx.logger`, and registers nothing — zero listeners, zero session events. The `acp-agent` app ships no stdout logger, so the warning cannot reach the ACP JSON-RPC channel. A scenario (or a real project) that wants only Claude hooks ships only `hooks.json`; the Codex bridge sees no `codex-hooks.json` and vanishes. This was verified empirically: with both bridges loaded, all pre-existing snapshots (none of which ship a `codex-hooks.json`) are byte-identical.
 
-Loading both is the minimum that lets the snapshot tier exercise each dialect against the same real app the product ships. Recording (which boots `cordis.yml`) must load both too, so a recorded Codex scenario captures the transcript with its hook genuinely active — hence the symmetric edit to both configs.
+Loading both is the minimum that lets the snapshot tier exercise each dialect against the same real app the product ships. Recording (which boots `cordis.yml`) loads both by construction, and replay inherits them the same way: `cordis.snapshot.yml` is an include-overlay of `cordis.yml` that swaps only the llm entry (see [single-source the acp-agent replay config](2026-07-04-single-source-acp-replay-config.md)), so a bridge added to the live tree is in the replay tree with no second edit.
 
 ### 2. A snapshot scenario per hook point × its headline outcome, both dialects
 

docs/rfc/implemented/testing/2026-07-04-single-source-acp-replay-config.md

@@ -0,0 +1,23 @@
+# RFC: Single-source the acp-agent replay config
+
+Status: implemented
+
+## Problem
+
+`examples/acp-agent` shipped two hand-maintained configs: `cordis.yml` (the live tree) and a `cordis.snapshot.yml` that mirrored it entry-for-entry with only the llm backend swapped — stripped of comments, the entire difference was the eight-line `llm-deepseek` stanza versus the two-line `llm-replay` stanza. Every app-shape change had to be made twice, and nothing gated the symmetry: if the copies drifted, the snapshot tier would silently exercise a different app than the one that ships — the ["green units, broken product" class of gap](../../../postmortem/0001-acp-default-export-drops-inject.md) the snapshot tier exists to close, reintroduced one level up, with reviewer vigilance as the only defense.
+
+## Decision
+
+`cordis.snapshot.yml` is a declarative overlay, not a copy: its single entry mounts `@cordisjs/plugin-include` on `./cordis.yml` with `patches` that disable the `llm-deepseek` entry (matched by id AND asserted by `name`, so a reused id can never disable the wrong plugin) and insert the `llm-replay` entry ([the vendored include plugin](../../../../vendor/include/src/index.ts)'s patch mechanism: by-id overrides with an optional name assertion, plus top-level inserts). Every other entry — the app, the bash executor, the fs/subagent/todo tools, both hook bridges, the system prompt — is the live tree itself, loaded through the include, so replay exercises exactly what ships and an app-shape change lands once. The `dsh-acp-agent` bin is untouched (it still just selects this file for `DSH_SNAPSHOT=replay`); recording still boots `cordis.yml` directly; the bin's `assertEntriesLoaded` guard tolerates the disabled entry by design (a disabled entry is the one legitimate fiber-less state).
+
+One vendored-plugin fact the overlay depends on, deliberately: the include applies `patches` when it loads the file — its `refresh()`/`internal/update` paths re-read without re-patching — which is exactly enough for a one-shot replay boot (the replay app loads no `hmr` and nothing rewrites the config mid-run). The snapshot suite is the proof: all scenarios pass unchanged on the overlay, byte-identical goldens included.
+
+## Why not the alternatives?
+
+Keeping the full twin with a symmetry verify-gate was the recorded fallback — it would have removed the silent-drift class but kept a 125-line near-copy whose only content was one entry's difference, growing with every plugin the app gains. A bin-side swap (parse the config, replace the entry, delete the file) would have put YAML surgery inside a published artifact and moved the replay delta out of sight; the overlay keeps the delta declarative, readable, and next to the base config — the teaching value the twin's defenders actually wanted.
+
+## Consequences
+
+- A plugin added to `cordis.yml` is in the replay tree with no second edit; the drift class is structurally gone rather than gated.
+- The overlay depends on entries carrying stable `id:`s. The `name` assertion on the disable patch guards mis-targeting (a reused id skips the patch instead of disabling the wrong plugin). An id RENAME degrades the patch to a skip whose warning needs a logger the replay app deliberately lacks — the observable result is a futile keyless `llm-deepseek` entry alongside `llm-replay`, with replay output still correct (`llm-replay` owns the stream short-circuit); config rot for review to catch, not wrong snapshots. A top-level insert whose id collides with an existing entry resolves last-wins through the loader's id map — the current config has no collision, and a new patch line is where one would be introduced.
+- If a future replay tree needs a second divergence (another backend swapped), it is one more patch line, not a second fork of the file.

docs/rfc/proposed/feature/2026-06-30-pre-tool-input-rewrite.md

@@ -1,4 +1,4 @@
-# RFC: Pre-tool input rewrite — a consistent design (proposed)
+# RFC: Pre-tool input rewrite — a consistent design
 
 Status: proposed (2026-06-30)
 

docs/rfc/proposed/process/2026-07-04-generate-rfc-index-tables.md

@@ -1,27 +0,0 @@
-# RFC: Generate the RFC index tables
-
-Status: proposed
-
-## Problem
-
-`docs/rfc/README.md`'s per-lifecycle/per-class tables are hand-maintained even though every fact in them is derivable: an RFC's path encodes lifecycle and class, its filename encodes the first-proposed date, and its H1 carries the title. `scripts/verify-rfc-classification.ts` already walks the tree and cross-checks the index — the expensive parsing exists; it reports instead of writing.
-
-The tables are also the repo's highest-contention docs hotspot: every proposal wave appends rows to the same few lines, so concurrent RFC branches conflict precisely there while agreeing everywhere else, and each conflict is resolved by hand-merging rows whose content the filesystem already knows. [The classification RFC](../../implemented/process/2026-06-20-rfc-classification.md) records rejecting auto-generation to keep the file curated — but the curated part of the README is the prose, and the prose never conflicts; only the mechanical tables do.
-
-## Proposal
-
-Keep the curated prose; generate the tables. Add a `gen-rfc-index` mode (a `--write` flag on `verify-rfc-classification.ts`, or a sibling script sharing its walker) that scans the RFC tree, reads each H1, derives the date from the filename, and rewrites the table rows under stable generated markers per `## {Lifecycle}` / `### {Class}` section; `verify-rfc-classification` asserts freshness — the `gen-cordis-catalog`/`verify-cordis-catalog` pattern. The class and lifecycle sets stay closed in the script. The implementing PR amends the classification RFC's rejected-alternatives record per [implemented/AGENTS.md](../../implemented/AGENTS.md), since this supersedes that recorded choice.
-
-## Why not keep the verifier-only model?
-
-It catches mistakes but still makes every proposal edit a shared hotspot, and a failed verifier is strictly more annoying than a generator for a purely mechanical row: the author has already named and placed the file; the index copy adds no information. This is the same hand-list-versus-derivation judgment the [package-inventory proposal](2026-06-20-discover-package-inventory.md) applies to tsconfig references and knip stanzas — applied to the one list that demonstrably conflicts.
-
-## Acceptance criteria
-
-- `pnpm run gen-rfc-index` (or the chosen spelling) rewrites only the generated table regions; `verify-rfc-classification` fails when they are stale and passes after regeneration.
-- Adding, moving, or deleting an RFC requires editing only the RFC file itself; the rows are produced from path + H1 + filename date.
-- The prose outside the generated markers is untouched by the generator; `pnpm run doc-sync` passes.
-
-## Risks
-
-Generated regions inside a curated file need explicit markers so ownership is obvious to reviewers. Reading H1s makes a malformed header a generator error — useful pressure, and it should fail clearly. This supersedes an implemented process decision; amending that RFC's record is part of the change, not optional.

docs/rfc/proposed/simplification/2026-07-04-drop-image-content-block.md

@@ -1,27 +0,0 @@
-# RFC: Drop the `image` content block until a path can honor it
-
-Status: proposed
-
-## Problem
-
-`ImageBlock` (`packages/llm/llm/src/types.ts`) has no production producer, and every consumer on every path DROPS it: the deepseek adapter's serializer skips image blocks (a documented MVP limitation), the pi-ai converter skips them as unrepresentable, the ACP codec neither advertises image prompt capability nor forwards image blocks outbound and REJECTS image prompt content inbound, and the compaction estimator charges a flat token constant and renders `[image]`. An `ImageBlock` constructed today would silently vanish from the wire — the vocabulary advertises a capability no path honors, which is the silent-data-loss shape AGENTS.md's defensive patterns warn against. The only constructors anywhere are tests pinning the skip/drop/estimate branches.
-
-## Proposal
-
-Remove `ImageBlock`, its `ContentBlockMap` entry, the explicit `image` estimate/placeholder arms in compact-basic, and the image-naming comments in the deepseek serializer's, pi-ai converter's, and ACP codec's default arms — those default arms already absorb the case the way they absorb any unknown block type. Update the vocabulary line in [architecture.md](../../../architecture.md), the block list in `packages/llm/llm/README.md`, the deepseek README's image-skip row, the pi-ai README's images-not-representable row, the compact-basic README's image-estimation and `[image]`-placeholder rows, the pastes in [core.md](../../../core-data-structures/core.md) and [llm-streaming.md](../../../core-data-structures/llm-streaming.md), and the type-equiv manifest; amend the [content-block vocabulary RFC](../../implemented/architecture/2026-06-11-content-block-vocabulary.md)'s block list and multimodal-home consequence per [implemented/AGENTS.md](../../implemented/AGENTS.md); drop or retarget the tests that construct image blocks to exercise the removed branches. The ACP codec's inbound rejection of image PROMPT content is unaffected — that guard is about protocol content a client can send regardless of our vocabulary, and it stays.
-
-## Why not keep it?
-
-This is the most contested cut in the batch. Multimodal input (screenshots) is a plausible near-term coding-agent feature, and the [content-block vocabulary RFC](../../implemented/architecture/2026-06-11-content-block-vocabulary.md) reserved the slot deliberately. Two responses. First, `ContentBlockMap` is merge-extensible by design: a real multimodal feature reintroduces `image` in core in the same coordinated change that maps it in the adapters, advertises and renders it in ACP, and prices it in compaction — the producer and its consumers arrive together, which is how the map is meant to grow. Second, the middle option — keep the type but make adapters throw UNSUPPORTED instead of silently dropping — converts this into exactly the shape the [request-knobs RFC](2026-07-04-drop-inert-request-knobs.md) argues against: surface whose only implementation is rejection. Absence (a compile error at the would-be producer) is strictly clearer than either silent loss or universal throw.
-
-If review lands on keeping the slot, the fallback this RFC records is: keep `ImageBlock` but replace every silent skip with a loud rejection, and document that policy in the vocabulary — the current silent drop is the one state with no defender.
-
-## Acceptance criteria
-
-- No `ImageBlock` / harness `type: 'image'` block construction outside this RFC; the codec's inbound ACP-image rejection still passes its tests.
-- Adapter/codec/compaction switches handle the case through their unknown-block default arms (pinned by the existing plugin-added-block tests where present).
-- Doc pastes, the manifest, and the architecture vocabulary list updated; `pnpm run doc-sync` green.
-
-## Risks
-
-Re-adding a core vocabulary type later touches several packages at once — but that coordinated change is the shape a real multimodal feature needs anyway (adapter mapping, ACP advertisement, compaction pricing), and none of it exists today to preserve.

docs/rfc/proposed/simplification/2026-07-04-drop-inert-request-knobs.md

@@ -1,33 +0,0 @@
-# RFC: Drop `GenerateOptions.prefill` and `ToolSchema.strict` — request knobs with no working end-to-end path
-
-Status: proposed
-
-## Problem
-
-Two request-contract knobs ride the whole request pipeline, yet neither can do anything today:
-
-- **`prefill`** (`packages/llm/llm/src/types.ts`) has no production setter — the loop assembles `model`/`system`/`tools`/`messages` plus `sessionId`/`signal`, and the compaction backend adds only `maxTokens` — and BOTH adapters reject it: `packages/llm/llm-deepseek/src/serialize.ts` and `packages/llm/llm-pi-ai/src/adapter.ts` each throw `LlmError('UNSUPPORTED')` on a non-undefined `prefill`. The field's entire observable behavior is two throws, each pinned by one adapter test. DeepSeek's chat-prefix completion is a Beta feature on a base URL neither adapter targets.
-- **`strict`** (`ToolSchema`, same file) is threaded through `DefineToolOptions`/`defineTool` (`packages/core/tools/src/schema.ts`), the registry's `schemas()` allowlist (`packages/core/tools/src/index.ts`), the deepseek wire mapping (`packages/llm/llm-deepseek/src/serialize.ts`, whose wire-type note records that strict mode requires the `/beta` base URL the adapter does not use), and a per-tool payload-patching pass in `packages/llm/llm-pi-ai/src/adapter.ts`. No shipped tool sets it — `rg` across every `tool-*` package src and `examples/` finds zero `strict:` producers; the only setters are dsh-tools unit tests.
-
-Both knobs are adapter-symmetric, so removal sheds them from both twins together — the [twin-adapter design](../../implemented/architecture/2026-06-13-twin-llm-adapters.md) is untouched.
-
-## Proposal
-
-- Remove `prefill` from `GenerateOptions`, both adapters' UNSUPPORTED guards, the tests pinning the throws, the paste lines in [core.md](../../../core-data-structures/core.md), the adapter README rows documenting the rejection, and the cookbook line using prefill as the UNSUPPORTED example ([adding-an-llm-adapter.md](../../../cookbook/adding-an-llm-adapter.md)); amend the [content-block vocabulary RFC](../../implemented/architecture/2026-06-11-content-block-vocabulary.md)'s consequence line naming prefill as having a home, per [implemented/AGENTS.md](../../implemented/AGENTS.md).
-- Remove `strict` from `ToolSchema`, `DefineToolOptions`, `defineTool`, and the `schemas()` allowlist; drop the deepseek serializer branch; simplify the pi-ai payload fixup to the unconditional scrub of pi-ai's own strict default (that half exists for wire parity with the hand-rolled twin and survives); drop the setter tests and the core.md paste line.
-
-This RFC deliberately does NOT touch `temperature`, `stop`, or `maxTokens`: those are honored end-to-end by both adapters and are the natural first targets of a request-mutating hook plugin on `agent/request`.
-
-## Why not keep them?
-
-"An explicit UNSUPPORTED throw is honest contract behavior" — but a knob whose only implementation across both twins is rejection promises nothing, and deleting it upgrades the failure mode: an accidental setter becomes a compile error instead of a runtime throw. "Strict schema adherence is an officially documented provider feature with complete plumbing" — but a knob is not product surface until a shipped tool sets it AND an endpoint honors it; today neither is true. Each returns with its first real producer: `prefill` together with an adapter that implements chat-prefix completion (and a stated policy for adapters that do not), `strict` together with a tool that wants it and a beta-endpoint story.
-
-## Acceptance criteria
-
-- `rg prefill` and a tool-schema-scoped `rg strict` return only this RFC (and unrelated prose such as `strictEqual`).
-- Both adapters compile and their contract tests pass without the guards; the pi-ai fixup still scrubs the library's strict default (wire parity pinned by its serializer tests).
-- Doc pastes and the type-equiv manifest in sync; `pnpm run doc-sync` green.
-
-## Risks
-
-The shipped hook bridges set no request fields at all, and a request-mutating plugin (an `agent/request` waterfall listener) would reach for `temperature`/`stop` (kept, working), not a field adapters reject. If chat-prefix completion or strict mode become product features, the re-add lands with the adapter/endpoint work, where the contract can say what actually happens rather than "everyone throws".

docs/rfc/proposed/simplification/2026-07-04-fold-stdio-ui-helper.md

@@ -1,27 +0,0 @@
-# RFC: Fold the stdio UI helper into the stdio app
-
-Status: proposed
-
-## Problem
-
-`@deepseek-ai/dsh-ui-stdio` is a whole package whose only runtime importer is the app package `@deepseek-ai/dsh-stdio-agent` (`packages/ui/stdio-agent/src/index.ts`). The examples reach the readline UI by loading the app, never by composing the helper themselves; every other repo reference is mechanical or descriptive surface that exists BECAUSE the package boundary exists — manifest and tsconfig entries, generated module-graph rows, dependency-graph and README rows, and doc comments naming the package. [The ui group README](../../../../packages/ui/README.md) records the placement rationale — the helper "exists chiefly for the examples and the coverage gate — `ui/` is reserved for surfaces shipped as product" — which leaves a standing tension: a shipped product app depends on a support package documented as NOT product surface.
-
-The boundary buys package metadata, workspace and tsconfig references, module-graph rows, README entries, and publint surface for a helper that is not independently swappable: the stdio app's front-door cluster always includes the readline UI, and nothing else can meaningfully consume it.
-
-## Proposal
-
-Fold the helper into `@deepseek-ai/dsh-stdio-agent`: move `createStdioChat`, its `StdioRuntime` test seam, and its unit tests into `packages/ui/stdio-agent`; delete the `packages/support/ui-stdio` package with its manifest, references, module-graph rows, and README rows; update every reference that names the package (the example e2e module docs, `packages/README.md`, the support and todo README rows, the stdio-agent README, the ui group README, tsconfig references, the generated module graph). Keep the runtime seam so EOF handling, rendering, disposal, and piped-vs-TTY behavior stay unit-covered without hijacking process globals; the keyless Loader-path smokes keep guarding the export shape end-to-end.
-
-## Why not promote it to `ui/` instead?
-
-Promotion would resolve the support-vs-product mismatch while keeping the boundary — the right call only if the readline UI were an independently swappable integration or had a second composer, and the consumer census says neither. The structured ACP bridge stays its own package because it is the product protocol surface with its own contract and snapshot tiers; the readline helper is scaffolding for one app's front door. Re-extraction stays cheap pre-release: if a second product app wants the readline UI, split it back out then, with that consumer shaping the package contract.
-
-## Acceptance criteria
-
-- `packages/support/ui-stdio` no longer exists; the helper and its tests live in `packages/ui/stdio-agent`; no reference to the deleted package remains outside RFC history.
-- The stdio app still renders transcript events, handles stdin lines and EOF, renders todo checklists, and disposes readline listeners under HMR; the echo/coding keyless smokes still boot through the real Loader path and guard the export shape.
-- Manifests, tsconfig references, the generated module graph, and docs are updated; `pnpm run test:coverage`, `pnpm run test:snapshot`, `pnpm run doc-sync`, `pnpm run build`, and `pnpm run hygiene` pass.
-
-## Risks
-
-A future standalone terminal UI may want the helper as a package again — reintroduce it with that second consumer rather than keeping the boundary for hypothetical reuse. Moving tests risks blurring app-composition tests with UI-rendering tests; keeping the runtime seam and the colocated unit tests avoids that.

docs/rfc/proposed/simplification/2026-07-04-prune-producerless-vocabulary-variants.md

@@ -1,31 +0,0 @@
-# RFC: Prune producer-less vocabulary variants (block cache hints, the `agent` message source, the `continuation` turn trigger)
-
-Status: proposed
-
-## Problem
-
-The merge-extensible vocabulary maps are designed to grow by declaration merging, and the codebase already states the admission policy on `TurnEndReasonMap` (`packages/core/session/src/types.ts`): a variant like `refusal` is "deliberately omitted until" an adapter or loop first emits it. Three declared vocabulary items violate that policy — each has no producer and no consumer, and two have not even a test:
-
-- **`CacheHint` and the three `cache?: CacheHint` fields** on `TextBlock`/`ToolResultBlock`/`ImageBlock` (`packages/llm/llm/src/types.ts`). Nothing constructs a block with `cache:` anywhere — src, tests, and doc pastes all come up empty — and neither adapter reads `.cache`: DeepSeek prompt caching is automatic, so the adapters map `prompt_cache_hit_tokens` OUT of responses without ever sending a hint IN. This is Anthropic-style `cache_control` surface with no provider that can honor it.
-- **`MessageSourceMap.agent`** (`{ kind: 'agent'; agentId: string }`, same file). Zero constructors, tests included. Its intended producer shipped without it: the subagent backends send the parent's prompt to the child with no `source`, so it logs as `{ kind: 'user' }`, and the generic envelope renderer interpolates `source.kind` without ever routing on it. The variant is pasted into [core.md](../../../core-data-structures/core.md).
-- **`TurnTriggerMap.continuation`** (`packages/core/session/src/types.ts`). The loop structurally cannot emit it — continuation happens *within* a turn as further steps, never as a new turn — and it constructs only `message` and `injection` triggers. The only writer is one hand-built test fixture that needs an arbitrary non-message trigger (`packages/support/llm-replay/tests/llm-replay.spec.ts`); the only production trigger reader, the ACP bridge, filters on `kind === 'message'`. The variant is pasted into [session.md](../../../core-data-structures/session.md).
-
-## Proposal
-
-Delete `CacheHint` with its three `cache?` fields, the `agent` message-source variant, and the `continuation` turn-trigger variant. Switch the llm-replay fixture to an `injection` trigger (any non-`message` trigger serves its purpose). Update the type-equiv pastes in [core.md](../../../core-data-structures/core.md) and [session.md](../../../core-data-structures/session.md) (and `scripts/type-equiv.manifest.json` where block identity shifts) in the same change, and amend the [content-block vocabulary RFC](../../implemented/architecture/2026-06-11-content-block-vocabulary.md)'s consequence line naming cache hints as having a home, per [implemented/AGENTS.md](../../implemented/AGENTS.md).
-
-Each variant returns the day it gains a real producer, exactly as the maps are designed to grow: a caching feature re-adds `cache` together with the adapter that transmits it; subagent attribution re-adds `agent` together with the backend that stamps it and a consumer that routes on it; an auto-continue feature that genuinely starts new turns re-adds `continuation` with the plugin that emits it.
-
-## Why not keep them?
-
-The [content-block vocabulary RFC](../../implemented/architecture/2026-06-11-content-block-vocabulary.md) lists "cache hints … have a home" as a design consequence, and reserved slots do advertise intent. But an empty slot is contract surface every implementation and consumer must consider (must my adapter honor `cache`? must my renderer route `agent` sources?), and the sibling map's own JSDoc already rejects reservation-without-emitter — `refusal` and `max_turn_requests` are named as variants to add *when something first emits them*, not declared in advance. Holding already-declared dead variants to the same standard makes the vocabulary mean something: if it is in the map, something produces it.
-
-## Acceptance criteria
-
-- `rg` for `CacheHint`, the `agent` message-source spelling, and the `continuation` trigger spelling returns only this RFC.
-- The core-data-structures pastes and the type-equiv manifest are in sync (`pnpm run doc-sync` green).
-- The fixture asserts the same replay behavior with an `injection` trigger; the suite is green.
-
-## Risks
-
-None operational — nothing can construct these values today. The mirror-event removals (recorded in [the boundary-mirror RFC](../../implemented/simplification/2026-06-20-remove-agent-boundary-mirror-events.md) and [the stream-chunk RFC](../../implemented/simplification/2026-07-02-remove-stream-chunk-mirror.md)) touch only transient `agent/*` events, never the durable vocabulary, so there is no collision. Elsewhere in the vocabulary the admission policy already holds: `rejected`, `prompt/blocked`, and `hook/invoked`/`hook/result` each have live producers — this RFC extends the same bar to the three variants that lack one. If the [image-block RFC](2026-07-04-drop-image-content-block.md) ships first, one of the three `cache?` fields leaves with it; the two proposals are independent and compose in either order.

docs/rfc/proposed/simplification/2026-07-04-prune-write-only-fs-surface.md

@@ -1,29 +0,0 @@
-# RFC: Prune write-only fields and a dead routing knob from the fs seam
-
-Status: proposed
-
-## Problem
-
-The [fs seam split](../../implemented/simplification/2026-06-26-fsspec-style-fs-seam.md) moved read routing and policy out of the backend into `dsh-tool-fs` and `dsh-fs-policy`. Four pieces of surface kept the pre-split shape — populated on every call, read by nobody:
-
-1. **`STREAM_MIN_SIZE` + `FsIoInternals.streamMinSize` in `dsh-fs-local`** (`packages/fs/fs-local/src/fsio.ts`, re-exported from `packages/fs/fs-local/src/index.ts`): zero readers anywhere, including fs-local's own source and tests. The backend has no read routing — `readWholeText`/`streamWholeText` are separate primitives the caller chooses between — and the real routing constant lives in the consumer (`packages/fs/tool-fs/src/read.ts`, compared against `info.size`). Two mirrors of the 10 MiB fact; the backend's is dead, and the knob's JSDoc claims a "read routing" override that does not exist.
-2. **`FsTarget.inputPath`** (`packages/fs/fs/src/types.ts`): every backend and every test fake must fabricate a "diagnostics only" value with zero production readers — the policy plugin and every error message use `targetKey`/`displayPath`. The `listDir` producer exposes the semantic wobble: directory children get the bare entry name, which was nobody's "input".
-3. **`FsEditOutcome.replacements` + `.replaceAll`** (`packages/fs/fs/src/types.ts`): `replacements` has zero production readers (the single-match policy itself stays — it is enforced by the `FS_AMBIGUOUS_EDIT`/`FS_EDIT_NOT_FOUND` throws inside the backend, whose error message keeps the internal count); `replaceAll` is read only by `formatEditOutput` in `packages/fs/tool-fs/src/edit.ts` — as an echo of the `replace_all` argument the tool already holds. Shrunk, `FsEditOutcome` becomes `{ version, before, after }`, parallel to `FsWriteOutcome`'s genuinely backend-discovered fields.
-4. **`FileReadOutcome.limit` + `.version`** (`packages/fs/tool-fs/src/read-render.ts`): populated by the read tool, but `formatReadOutput` renders `offset`/`lines`/`totalLines`/`truncatedByBytes` only, and the `fs/observed` emit uses `info.version` directly rather than the outcome copy.
-
-## Proposal
-
-Delete the fs-local constant, its re-export, and the `streamMinSize` knob (the remaining `FsIoInternals` knobs are genuinely used by the atomic-write tests); drop `inputPath` from `FsTarget`; shrink `FsEditOutcome` to `{ version, before, after }` and pass `replaceAll` to `formatEditOutput` from the parsed args; drop `limit`/`version` from `FileReadOutcome`. Update the [filesystem.md](../../../core-data-structures/filesystem.md) pastes, the type-equiv manifest, `packages/fs/fs/README.md`, and the test fakes that currently must fabricate the removed fields.
-
-## Why not keep them?
-
-A future permission/containment layer might want the pre-resolution path for error text — but it would want the *request*, which every call site still holds. "N occurrences replaced" might become model-facing text — a behavior change to design when wanted, and the backend-internal count survives for its error message. A read footer might display `limit` — everything the footer shows already derives from `lines`/`totalLines`. Meanwhile every current and future backend (remote, native) must fabricate wire fields nobody consumes, and every test fake must satisfy them.
-
-## Acceptance criteria
-
-- The removed surfaces are gone — `STREAM_MIN_SIZE`/`streamMinSize` in `dsh-fs-local`, `FsTarget.inputPath`, `FsEditOutcome.replacements`/`.replaceAll`, and `FileReadOutcome.limit`/`.version` — while the request-side `replaceAll` (`FsEditSpec`) and the version fields on the other outcome types are untouched; doc pastes and the manifest in sync; the suite is green with the shrunk fakes.
-- `formatEditOutput`'s emitted text is unchanged for both `replace_all` branches, so no snapshot golden churns.
-
-## Risks
-
-The in-flight fs discovery work (glob/grep tools) touches the same `dsh-fs` type files — a textual, not design, conflict; land in either order and reconcile mechanically. Backends gain no new obligations; they shed four.

docs/rfc/proposed/simplification/2026-07-04-remove-agent-steering-mirror.md

@@ -1,28 +0,0 @@
-# RFC: Remove the `agent/steering` mirror emit
-
-Status: proposed
-
-## Problem
-
-`agent/steering` is the last remaining transient mirror of a durable session event. The loop's steering drain appends the durable `steering/message { turn, content, source }` and, on the very next line, emits `agent/steering(agent, turn, content, source)` — the identical fact as a fire-and-forget event (`packages/core/agent-loop/src/loop.ts`, `drainSteering`). It has zero production listeners: the only subscriber anywhere is a loop regression test asserting the emit carries `source` — the same fact the durable event already records one line above.
-
-Both mirror-removal RFCs retained it while explicitly deferring the decision this RFC now makes. The [boundary-mirror removal](../../implemented/simplification/2026-06-20-remove-agent-boundary-mirror-events.md) kept it as "a live control signal, not a boundary"; the [stream-chunk removal](../../implemented/simplification/2026-07-02-remove-stream-chunk-mirror.md) kept it as "a live control signal with no durable twin, retained (its fate is a separate future decision)". The second rationale does not survive the code: the durable twin is `steering/message`, appended immediately before the emit with the same payload. The mirrored-vs-live-only line the taxonomy actually draws puts it on the mirror side: `agent/queued` is genuinely live-only (it fires at enqueue time, before any durable event exists, and already carries a `steering: boolean` flag — cancelled queued work never enters the log), while `agent/steering` fires at the exact moment its durable twin lands, carrying nothing the log does not.
-
-Steering carries real production traffic — the hook bridges' turn-continuation decisions inject their reasons through `inbox.steer()`, landing as durable `steering/message` events that the hook-matrix goldens pin — and every one of those consumers observes the durable event. Nothing observes the mirror.
-
-## Proposal
-
-Remove the `agent/steering` declaration from `packages/core/agent/src/types.ts` (and its mention in the live-events JSDoc list there), the emit in `drainSteering` (whose `ctx` parameter becomes unused and goes too), the row in `packages/core/agent/README.md`, and the emit line in the loop-pseudocode blocks (`packages/core/agent-loop/src/loop.ts` module doc and [architecture.md](../../../architecture.md)); run `pnpm run gen-cordis-catalog`. Retarget the one regression test at the durable `steering/message` event — the source-preservation fact it pins lives on the log. The implementing PR amends the two retaining RFCs' scope lines per [implemented/AGENTS.md](../../implemented/AGENTS.md): the boundary RFC's retained-list entry and the stream-chunk RFC's "no durable twin" clause.
-
-## Why not keep it?
-
-"It is a control signal, not a boundary" — but the taxonomy's operative distinction is mirrored-vs-live-only, not control-vs-boundary, and this event mirrors. A consumer that wants enqueue-time notification has `agent/queued` (with its steering flag); a consumer that wants drain-time notification is by definition asking for the moment `steering/message` is appended, which `session/event` delivers with the same payload plus durability. The rejected [retire-mid-turn-steering RFC](../../rejected/simplification/2026-06-20-retire-mid-turn-steering.md) defended the steering *capability* — `steer()`, the durable event, continuation forcing — all of which this removal keeps untouched.
-
-## Acceptance criteria
-
-- No `agent/steering` spelling outside this RFC and the two amended RFCs; the catalog is regenerated and fresh.
-- The retargeted test pins source preservation on `steering/message`; the suite is green.
-
-## Risks
-
-None known: zero production listeners exist to migrate, and both live-notification needs (enqueue, drain) have surviving homes (`agent/queued`, `session/event`).

docs/rfc/proposed/simplification/2026-07-04-share-app-bin-boot-glue.md

@@ -1,27 +0,0 @@
-# RFC: Share the app bins' boot glue instead of maintaining twin copies
-
-Status: proposed
-
-## Problem
-
-`packages/ui/stdio-agent/src/bin.ts` and `packages/ui/acp-agent/src/bin.ts` carry four near-twin helpers — `loadEnv`, `installFailLoud`, `assertEntriesLoaded`, `boot` — whose bodies differ essentially in the diagnostic prefix, plus two copies of the hardest-won boot lore in the repo: the `Promise.allSettled` swallow inside `loader.await()`, the silent-exit-0 import-failure guard, and the `--expose-internals` resolution note (the failure classes behind AGENTS.md's "real entry path means the published artifact" pattern). Drift has already begun: `boot(configPath)` resolves the path internally in one bin but requires a pre-resolved absolute path in the other, and the twin JSDoc prose has forked.
-
-The duplication is aggravated by a coverage hole: all of this logic sits OUTSIDE the per-file 100% gate — `vitest.config.ts` excludes `packages/*/*/src/bin.ts` because importing a self-executing bin (top-level `await main()`) runs it — which also makes the `export` keywords on these helpers decorative: no spec can import them, so the only exercisers are the subprocess smokes, and the two `built-bin.e2e.ts` suites duplicate their temp-node_modules scaffolding as well. The genuinely per-app pieces are small and real: the ACP bin owns snapshot-mode config selection (`resolveConfigPath`), replay-mode env skipping, the stdin-EOF dispose lifecycle, and stdout purity; the stdio bin owns nothing extra.
-
-## Proposal
-
-Extract the four helpers, parameterized by the bin's diagnostic prefix, into an importable non-bin module shared by both apps — a small published package in the `ui` group (the bins are published artifacts, so their runtime dependency must be published too, not `support/`). Each `bin.ts` becomes a thin self-executing `main()` plus its app-specific glue. The shared module gains unit tests and falls under the coverage gate; the loader-failure lore gets one home; the subprocess smokes remain the artifact-level guard — the published-bin smoke is NOT replaced by unit tests, per the "real entry path" defensive pattern. The implementing PR amends the [extract example app packages RFC](../../implemented/architecture/2026-06-20-extract-example-app-packages.md)'s facts ("boot glue moved into that bin, owned by the app" is the sentence that changes).
-
-## Why not keep the duplication?
-
-The bins were framed as independently-owned published artifacts, and a new package carries fixed overhead (manifest, README, tsconfig reference, publint surface) that rivals the deduplicated line count. But app-vs-app sharing was never weighed by that RFC — it consolidated three example `start.ts` copies INTO the bins and stopped there; the drift is now observed fact rather than speculation; and the coverage-gap argument is independent of the dedup argument: this is the only nontrivial runtime logic in the repo exempt from the per-file 100% gate. The alternative of a copy-by-convention shared source file is the current state with extra steps.
-
-## Acceptance criteria
-
-- The four helpers exist once, unit-tested, under the coverage gate; both bins are thin mains plus app-specific glue.
-- Both built-bin smokes still pass under plain node in the node_modules-shaped temp dir, including the missing-config non-zero exit.
-- The app-packages RFC's facts are amended in the same change.
-
-## Risks
-
-Churn in two published bins and one new package boundary; the shared module must stay dependency-light (cordis plus the loader). If the implementing PR finds the package overhead genuinely exceeds the dedup — the honest failure mode of this proposal — the fallback that still pays is extracting only the coverage-exempt pure logic (`assertEntriesLoaded`, `resolveConfigPath`) into an importable module within each app package, ending the coverage exemption without a new package.

docs/rfc/proposed/simplification/2026-07-04-tighten-hook-protocol-contract.md

@@ -1,32 +0,0 @@
-# RFC: Tighten the hook-protocol contract — dialect, discarded fields, double defaults, and lib-owned `hook/result` semantics
-
-Status: proposed
-
-## Problem
-
-Five pieces of the `dsh-hook-protocol`/bridge contract miss the discipline the [subagent-observe-enrich RFC](../../implemented/feature/2026-06-30-subagent-observe-enrich.md) records — it dropped an `agentType` lifecycle field for lacking a consumer, and these fail the same test:
-
-1. **`HookDialect`'s `'native'` variant** (`packages/hooks/hook-protocol/src/types.ts`) has zero producers — the bridges stamp `'claude'` and `'codex'`; the only `'native'` constructor anywhere is the lib's own unit test. The field's own JSDoc defines `dialect` as "the bridge that ran it", and native is not a bridge: the [interception-seams RFC](../../implemented/feature/2026-06-30-interception-seams.md) records that native hooks are not a package and that "a native plugin can already use the typed Decisions" without the durable hook log, and the flagship native-plugin worked example asserts exactly that (no `hook/*` events at all).
-2. **`HookOutput.suppressOutput`** (same file) is parsed by the codec and discarded on every path: no bridge branch, no merge fold, no warn, no deferred-list row — uniquely among its parsed-but-unhonored siblings, each of which carries a stated deferral (`updatedInput` → a logged warn plus the [pre-tool-input-rewrite proposal](../feature/2026-06-30-pre-tool-input-rewrite.md); `systemMessage` → a logged warn plus a README deferred row; `continue`/`stopReason` → a `TODO(hook-continue-false)` anchor plus the `'stop'` decision record). Structurally there is nothing to suppress: hook stdout never enters any transcript (context flows only via `additionalContext`; the log records only `decision`/`stderrSummary`), so a hook author setting `suppressOutput: true` gets silent nothing with no warn.
-3. **`hook/result.durationMs`** is durable timing telemetry with no reader. Both bridges write it, and the ACP snapshot normalizer scrubs it to `0` because wall-clock hook runtime is replay noise (`examples/acp-agent/tests/snapshot-normalize.ts`); the remaining consumers are tests and the goldens that exist because the field exists. Deterministic provenance fields (`point`, `matcher`, `turn`, `handlerId`) earn their durability as audit facts; a nondeterministic field that replay must erase and nothing reads earns neither its bytes nor its special-case scrub.
-4. **`defaultTimeoutMs` is double-defaulted in both bridge configs** — a schema `.default(600_000)` AND a `?? 600_000` fallback (`packages/hooks/hooks-claude/src/index.ts`, `packages/hooks/hooks-codex/src/index.ts`) — the same two-homes-for-one-literal shape the ACP bridge's `TODO(double-default)` flags, for a knob no shipped config sets; the per-hook `timeoutSec` is the real timeout surface.
-5. **The `hook/result` semantics live in the bridges, twice, not in the lib that owns the event.** `summarize()` — the 500-character stderr truncation rule — is byte-identical in `packages/hooks/hooks-claude/src/index.ts` and `packages/hooks/hooks-codex/src/index.ts`, and so is the decision-string rule `output.decision ?? (output.continue === false ? 'stop' : 'pass')`; yet `dsh-hook-protocol` declares `hook/result`, documents `stderrSummary` as "truncated" without owning the truncation, and documents the decision values without owning the mapping. If one bridge drifts (a different cap, a different fallback), the shared durable event's semantics fork silently.
-
-## Proposal
-
-Narrow `HookDialect` to `'claude' | 'codex'` and fix its JSDoc; retarget the lib's one `'native'` test. Drop `suppressOutput` from `HookOutput`, the codec's parse lines, its codec-test assertions, and the parsed-superset lists in the lib README and [hook-protocol-lib RFC](../../implemented/feature/2026-06-30-hook-protocol-lib.md) (amended per [implemented/AGENTS.md](../../implemented/AGENTS.md)). Drop `durationMs` from `HookResultRecord`, `RunHookResult`, the `hook/result` event, the bridge appends, the docs/catalog, and the snapshot normalizer's special-case scrub (retiring `runHook`'s injected clock if nothing else needs it); the hook goldens refresh mechanically as the scrubbed field disappears. Replace the bridges' `defaultTimeoutMs` config knob with one shared reference-default constant in `dsh-hook-protocol` (per-hook `timeoutSec` stays the override surface). Move the `hook/result` semantics into the lib: `appendHookResult` (or a helper it exposes) derives `stderrSummary` and the decision string from the `HookOutput` + exit outcome, and both bridges delete their private copies. Rider: un-export `BLOCKING_EXIT_CODE` (zero importers; even the codec tests spell the literal `2`).
-
-## Why not keep them?
-
-The [hook-protocol-lib RFC](../../implemented/feature/2026-06-30-hook-protocol-lib.md) deliberately records "parses the full CC superset" — the strongest counterargument is that this proposal re-litigates decisions that RFC records. But parsing a field whose value can never influence anything is not protocol faithfulness, it is a reader trap; a dialect variant that the design's own thesis says will never be stamped is vocabulary without an interpreter; and durable telemetry that replay must scrub is a cost with no buyer. Each returns trivially with its first real consumer (a transcript surface with hook stdout to suppress; a native-provenance feature that logs hook events; a trace viewer that reads timings — as live diagnostics or a deliberately durable telemetry event designed for it). On item 5, the lib RFC chose per-bridge explicitness over a parameterized engine — but that choice governed payload construction and Decision mapping; the semantics of the SHARED durable event are precisely the "primitives where duplication would actually be dangerous" that the same RFC assigns to the lib.
-
-## Acceptance criteria
-
-- `HookDialect` is two-valued; `rg "'native'"` in the hooks packages returns only this RFC's amended references.
-- `suppressOutput` and `durationMs` appear nowhere in source, parsed-field doc lists, the catalog, or the normalizer; the hook goldens are re-recorded or refreshed without the field.
-- Both bridge configs lose `defaultTimeoutMs`; the reference default lives once, in the lib; per-hook `timeoutSec` still overrides it.
-- One definition each of the truncation rule and the decision-string rule, in `dsh-hook-protocol`, exercised by both bridges' suites.
-
-## Risks
-
-The `dialect`, `suppressOutput`, `defaultTimeoutMs`, and semantics changes are invisible on the wire and in the goldens; the `durationMs` removal churns the hook goldens once (a mechanical refresh — the field was already normalized to a constant). The cost is churn in `dsh-hook-protocol` and both bridges — cheap under the pre-release stance, and cheaper than letting two copies of a durable event's semantics age apart.

docs/rfc/proposed/simplification/2026-07-04-trim-acp-bridge-unreachable-surface.md

@@ -1,27 +0,0 @@
-# RFC: Trim unreachable ACP bridge surface — the branding knobs and the kind-sniffing fallback
-
-Status: proposed
-
-## Problem
-
-Two pieces of `dsh-acp` surface are unreachable from any shipped configuration:
-
-1. **`AcpConfig.agentName` / `agentVersion`** (`packages/ui/acp/src/index.ts`). The shipped app package hands the bridge only `{ model, systemPrompt }` (`packages/ui/acp-agent/src/index.ts`), so no leaf `cordis.yml` — the only production config surface — can set the knobs at all; they are settable solely by direct-mounting the bridge, which only a unit test does. Every snapshot golden — the hook-matrix scenarios included — pins the schema defaults (`deepseek-harness-acp` / `0.0.1`). The pair also carries a live `TODO(double-default)`: the literals exist twice (schema `.default(...)` plus `??` fallbacks), with the TODO asking to pick one home.
-2. **The `toolKindFor` name heuristic** (same file) special-cases `bash*`/`read*`/`write`/`edit*` tool names in the generic-fallback path. Since the [render-intent union](../../implemented/architecture/2026-07-02-tool-render-intent-union.md), every first-party tool those arms match ships its own `presentCall` carrying its kind, and the presenter-less production tools (`subagent`, `subagent_fork`) fall through to `other` anyway. The arms are production-reachable only when a tool's `presentCall` THROWS (the containment fallback) — and the bridge's own module doc states the design rule the heuristic violates: "the bridge never special-cases tool names".
-
-## Proposal
-
-Hardcode `agentInfo` at the `initialize` site (`{ name: 'deepseek-harness-acp', version: '0.0.1' }`), deleting the two config fields, their schema defaults, the `??` fallbacks, and the `TODO(double-default)` whose subject vanishes; drop the knob half of the direct-mount config test, the two rows in `packages/ui/acp/README.md`, and the `packages/ui/acp/acp-feature-support.md` cell that cites the knobs. Zero golden churn — the emitted wire value is unchanged. Replace `toolKindFor` with the constant `'other'` in both fallback sites (the presenter fallback and `nullToolPresenter`) and delete the heuristic with its test rows.
-
-## Why not keep them?
-
-`agentInfo` is client-visible branding a deployment will eventually want configurable — but a knob no shipped config can reach is not configurability, it is drift surface (the double-default TODO is its symptom), and the honest re-add must include the `dsh-acp-agent` plumb-through that does not exist today either; both arrive together with the deployment that needs them. For the heuristic: a hypothetical third-party presenter-less tool named `read_docs` would lose its inferred `read` icon — but inferring kinds from unknown plugins' names is exactly the special-casing the render-intent design rejected. The behavior delta on shipped paths is confined to the presenter-throw fallback, where rendering kind `other` makes the client show the raw input instead of a masquerading first-party card — strictly better diagnostics for a broken presenter.
-
-## Acceptance criteria
-
-- `agentName`/`agentVersion` and `toolKindFor` appear only in this RFC; snapshot goldens are byte-identical; bridge tests are green with the constant fallback.
-- The `initialize` handshake continues to report `deepseek-harness-acp`/`0.0.1` (pinned by the handshake snapshot).
-
-## Risks
-
-None beyond the presenter-throw rendering delta described above — an error path whose new behavior is more diagnosable than the old.

docs/rfc/proposed/testing/2026-07-04-single-source-acp-replay-config.md

@@ -1,26 +0,0 @@
-# RFC: Single-source the acp-agent replay config
-
-Status: proposed
-
-## Problem
-
-`examples/acp-agent` ships two hand-maintained configs: `cordis.yml` (the live tree) and `cordis.snapshot.yml` (the keyless replay tree). Stripped of comments and blanks, their entire difference is ONE plugin entry — the eight-line `llm-deepseek` stanza (with its `!!js` env keys and model list) versus the two-line `llm-replay` stanza. Every other entry is byte-identical, including the multi-line system prompt and both hook-bridge stanzas. Every app-shape change must therefore be made twice, and the [hook-snapshot-matrix RFC](../../implemented/testing/2026-07-04-hook-snapshot-matrix.md) records paying exactly that tax: "hence the symmetric edit to both configs".
-
-Nothing gates the symmetry. If the copies drift, the snapshot tier silently exercises a different app than the one that ships — the ["green units, broken product" class of gap](../../../postmortem/0001-acp-default-export-drops-inject.md) the snapshot tier exists to close, reintroduced one level up, with reviewer vigilance as the only defense.
-
-## Proposal
-
-Make the replay tree derive from the live tree instead of mirroring it. Preferred endpoint: a single source — either `cordis.snapshot.yml` becomes a thin overlay that includes `cordis.yml` and swaps only the llm entry (if the vendored loader/include config supports entry-level override), or the acp-agent bin's existing `DSH_SNAPSHOT=replay` branch performs the one-entry swap on the parsed config and `cordis.snapshot.yml` is deleted. Fallback endpoint, if single-sourcing is judged too magical for a teaching example: keep both files and add a boring verify gate (in the `doc-sync`/`hygiene` family) asserting the two configs' entry sets are equal modulo the llm entry. The implementing PR picks after checking the loader's include/override capability, updates the recording docs, and amends the snapshot RFCs' facts per [implemented/AGENTS.md](../../implemented/AGENTS.md).
-
-## Why not keep the twin?
-
-An explicit replay file is transparently readable and teaches replay semantics — the strongest counterargument, and the reason the fallback keeps the file and adds only the gate. YAML surgery inside the published bin is real complexity in a shipping artifact, and an include-overlay depends on loader capability that may not exist. But the status quo — a 125-line hand-maintained near-copy of a 141-line file whose one meaningful difference is two lines, defended by nothing — is the one option with a silent failure mode, and it grows with every plugin the app gains (the hook-bridge stanzas are twins in both files).
-
-## Acceptance criteria
-
-- Either one config file plus a mechanical llm-entry swap exercised by the snapshot suite itself, or two files plus a symmetry gate that fails CI on any non-llm divergence.
-- All snapshot scenarios (hook matrix included) pass unchanged; `pnpm run test:snapshot:record` still boots the live tree.
-
-## Risks
-
-The include-overlay shape may be unsupported by the vendored loader — then the bin-side swap or the gate. `echo-agent`/`coding-agent` are unaffected (no snapshot twin). If the gate route is chosen, it is one more bespoke verify script — the cost the repo's gate-friendly policy explicitly accepts for encoding an invariant no human reliably remembers.

examples/acp-agent/cordis.snapshot.yml

@@ -1,125 +1,33 @@
-# Snapshot-test REPLAY config: the acp-agent plugin tree with the model backend
-# swapped to llm-replay (serves a recorded session JSONL — no API key, no
-# network). The dsh-acp-agent bin selects this file for DSH_SNAPSHOT=replay.
+# Snapshot-test REPLAY overlay: the SAME app tree as cordis.yml, derived from
+# it by an include — the one difference is the model backend. A keyless replay
+# run cannot boot the real adapter (llm-deepseek's apply() throws without
+# DEEPSEEK_API_KEY), so the include patches the live tree at load time: the
+# llm-deepseek entry is disabled by id, and the llm-replay entry (which serves
+# a recorded session JSONL — no API key, no network) is inserted. Every other
+# entry — the app, the bash executor, the fs/subagent/todo tools, both hook
+# bridges, the system prompt — IS the live tree, so replay exercises exactly
+# what ships and an app-shape change lands once, in cordis.yml.
 #
-# Same app as cordis.yml (@deepseek-ai/dsh-acp-agent: the agent-core spine +
-# JSONL persistence + the ACP bridge) — only the LLM backend differs: llm-replay
-# here, llm-deepseek there. It can't reuse the real adapter because llm-deepseek's
-# apply() throws without DEEPSEEK_API_KEY, killing a keyless replay run at boot.
-#
-# stdout is reserved for the ACP JSON-RPC protocol — no stdout logger (the app
-# package omits it). The replay fixture path comes from $DSH_SNAPSHOT_FILE (and
-# an optional $DSH_SNAPSHOT_OVERRIDE sidecar), set by the snapshot harness.
-
-# The replay adapter: short-circuits llm/stream with the recorded log's chunks,
-# in place of llm-deepseek.
-- id: llm-replay
-  name: '@deepseek-ai/dsh-llm-replay'
-
-# Local bash executor for agent-core's tool-bash schema.
-# FIXME(config-comments): keep this executor note from implying bash is the
-# whole tool set; filesystem, subagent, and todo_write are loaded below.
-- id: bash
-  name: '@deepseek-ai/dsh-bash-local'
-  config:
-    timeoutMs: 60000
-
-# The ACP server app — identical to cordis.yml's entry.
-- id: acp-agent
-  name: '@deepseek-ai/dsh-acp-agent'
-  config:
-    model: deepseek-v4-flash
-    persistenceRoot: !!js process.env.DSH_SNAPSHOT_SESSIONS_ROOT ?? './.sessions'
-    systemPrompt: |
-      You are a coding assistant driven over the Agent Client Protocol.
-
-      Your tools are read/write/edit for file operations, bash (plus
-      bash_output/bash_kill for background tasks), and subagent. Use read to
-      inspect UTF-8 text files, write to create or replace files, and edit for
-      targeted literal replacements. Use bash for shell commands, tests,
-      searches, and operations that are not ordinary file reads or edits. Each
-      bash call runs in a fresh shell — pass workdir instead of cd. Check the
-      [exit code: N] marker; verify your work. Keep answers brief and factual.
-
-      Use the subagent tool to delegate a focused, self-contained subtask to
-      a fresh child agent (it works in its own context and returns only its
-      final result) — give it a complete, standalone instruction. Use
-      subagent_fork instead when the subtask needs THIS conversation's
-      context: the child inherits the log so far.
-
-      For multi-step work, use the todo_write tool to track a task list:
-      send the WHOLE list each call (it replaces the previous one), keep at
-      most one task in_progress (exactly one while work remains), and mark a
-      task completed as soon as it is done. Skip it for trivial single-step
-      tasks.
-
-# The subagent seam + both in-process backends + two model-facing tools —
-# identical to cordis.yml's wiring (only the LLM backend differs above): spawn
-# and fork are each reachable via a dsh-tool-subagent bound to it with a distinct
-# toolName (subagent → spawn, subagent_fork → fork).
-- id: subagent
-  name: '@deepseek-ai/dsh-subagent'
-
-- id: subagent-spawn
-  name: '@deepseek-ai/dsh-subagent-spawn'
-  config:
-    providerName: spawn
-
-- id: subagent-fork
-  name: '@deepseek-ai/dsh-subagent-fork'
-  config:
-    providerName: fork
-
-- id: tool-subagent
-  name: '@deepseek-ai/dsh-tool-subagent'
-  config:
-    provider: spawn
-    toolName: subagent
-
-- id: tool-subagent-fork
-  name: '@deepseek-ai/dsh-tool-subagent'
-  config:
-    provider: fork
-    toolName: subagent_fork
-
-# The model-facing todo_write tool — identical to cordis.yml's wiring, so a
-# replayed todo_write tool call resolves to a real tool during snapshot replay.
-- id: tool-todo
-  name: '@deepseek-ai/dsh-tool-todo'
-
-# Filesystem capability stack — identical to cordis.yml's wiring, so replayed
-# read/write/edit tool calls resolve to the real tools during snapshot replay.
-- id: fs-local
-  name: '@deepseek-ai/dsh-fs-local'
-  config:
-    cwd: !!js process.cwd()
-
-- id: fs-policy
-  name: '@deepseek-ai/dsh-fs-policy'
-
-- id: tool-fs
-  name: '@deepseek-ai/dsh-tool-fs'
-
-# The Claude Code hook bridge. `configPath` is read ONCE at load and resolves
-# `./hooks.json` against the PROCESS cwd (not per-session) — in these snapshot
-# runs the harness launches the subprocess with process cwd = the scenario's temp
-# workspace, so a scenario that ships `workspace/hooks.json` (copied into that cwd
-# before the run) exercises the hooks path end-to-end; every other scenario has no
-# such file, so the parse fails-soft and the bridge registers nothing (a silent
-# no-op — the ACP app loads no logger exporter, so the warning never reaches
-# stdout). Hooks themselves run in the session cwd (the bridge passes it as workdir).
-- id: hooks-claude
-  name: '@deepseek-ai/dsh-hooks-claude'
-  config:
-    configPath: ./hooks.json
-
-# The Codex hook bridge, loaded alongside the Claude one (symmetric with
-# cordis.yml so a recorded Codex scenario fires the hook during recording too). It
-# reads its OWN file `./codex-hooks.json` (Codex's dialect) — the two bridges
-# cannot share one config. Same fails-soft-when-absent contract: a scenario that
-# ships `workspace/codex-hooks.json` exercises the Codex path end-to-end; a
-# scenario without one registers nothing (a silent no-op, never reaching stdout).
-- id: hooks-codex
-  name: '@deepseek-ai/dsh-hooks-codex'
-  config:
-    configPath: ./codex-hooks.json
+# The dsh-acp-agent bin selects this file for DSH_SNAPSHOT=replay. The replay
+# fixture path comes from $DSH_SNAPSHOT_FILE (and an optional
+# $DSH_SNAPSHOT_OVERRIDE sidecar), set by the snapshot harness. stdout stays
+# reserved for the ACP JSON-RPC protocol (the app package loads no stdout
+# logger). Patches apply when the include loads the file — a one-shot replay
+# boot, so the load-time-only patch semantics are exactly enough.
+- id: base
+  name: '@cordisjs/plugin-include'
+  config:
+    path: ./cordis.yml
+    patches:
+      # The name is an assertion, not an override: the include skips the patch
+      # (warning if a logger exists) when the id points at a different plugin,
+      # so this can never disable the wrong entry. If cordis.yml ever RENAMES
+      # the id, the patch degrades to a skip — replay output stays correct
+      # (llm-replay still short-circuits the stream) but the stale patch and a
+      # futile keyless adapter entry linger until review catches them.
+      - id: llm-deepseek
+        name: '@deepseek-ai/dsh-llm-deepseek'
+        disabled: true
+      - insert:
+          - id: llm-replay
+            name: '@deepseek-ai/dsh-llm-replay'

examples/acp-agent/tests/snapshots/hook-codex-posttool-block/stdout.golden.jsonl

@@ -79,7 +79,7 @@
 {"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" or"}}}}
 {"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" command"}}}}
 {"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"call_00_XLxXjqVljRIC2KwFZCKX3369","title":"bash","kind":"execute","status":"in_progress","rawInput":{"command":"echo HELLO"}}}}
+{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"call_00_XLxXjqVljRIC2KwFZCKX3369","title":"bash","kind":"other","status":"in_progress","rawInput":{"command":"echo HELLO"}}}}
 {"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call_update","toolCallId":"call_00_XLxXjqVljRIC2KwFZCKX3369","status":"failed","content":[{"type":"content","content":{"type":"text","text":"tool output rejected by codex policy: summarize instead"}}]}}}
 {"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"The"}}}}
 {"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" tool"}}}}
@@ -99,7 +99,7 @@
 {"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" invoke"}}}}
 {"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" it"}}}}
 {"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"call_00_twNfzWSJ9WJn8YeoGVIi1932","title":"bash","kind":"execute","status":"in_progress","rawInput":{"command":"printf 'HELLO\\n'"}}}}
+{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"call_00_twNfzWSJ9WJn8YeoGVIi1932","title":"bash","kind":"other","status":"in_progress","rawInput":{"command":"printf 'HELLO\\n'"}}}}
 {"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call_update","toolCallId":"call_00_twNfzWSJ9WJn8YeoGVIi1932","status":"failed","content":[{"type":"content","content":{"type":"text","text":"tool output rejected by codex policy: summarize instead"}}]}}}
 {"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"Every"}}}}
 {"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" attempt"}}}}
@@ -139,7 +139,7 @@
 {"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" is"}}}}
 {"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" working"}}}}
 {"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":":"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"call_00_xOnTckie072jHuPhX0Mz5115","title":"bash","kind":"execute","status":"in_progress","rawInput":{"command":"pwd"}}}}
+{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"call_00_xOnTckie072jHuPhX0Mz5115","title":"bash","kind":"other","status":"in_progress","rawInput":{"command":"pwd"}}}}
 {"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call_update","toolCallId":"call_00_xOnTckie072jHuPhX0Mz5115","status":"failed","content":[{"type":"content","content":{"type":"text","text":"tool output rejected by codex policy: summarize instead"}}]}}}
 {"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"It"}}}}
 {"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" seems"}}}}

examples/coding-agent/tests/keyless-smoke.e2e.ts

@@ -9,8 +9,8 @@ import { afterEach, describe, expect, it } from 'vitest'
  * Keyless Loader-path smoke for examples/coding-agent: boot the REAL example
  * through the `@deepseek-ai/dsh-stdio-agent` bin against its `cordis.yml` (the
  * cordis Loader, `unwrapExports`, the full plugin tree incl. the
- * `@deepseek-ai/dsh-agent-core` bundle and the extracted
- * `@deepseek-ai/dsh-ui-stdio`), then close stdin with no prompt and assert the
+ * `@deepseek-ai/dsh-agent-core` bundle and the app's in-package readline UI
+ * module), then close stdin with no prompt and assert the
  * ready banner + a clean exit.
  *
  * No prompt is ever sent, so the model is NEVER called — this is why it runs
@@ -18,9 +18,10 @@ import { afterEach, describe, expect, it } from 'vitest'
  * `apply()` only requires a key to be PRESENT (it does not validate it and only
  * uses it when a stream actually starts), so a dummy key lets the tree boot
  * while the absence of any prompt guarantees no network call. The value is the
- * real-Loader-path guard for the app + bundle + UI plugin export shapes (a broken
- * `export default` that drops `inject`/`Config` would crash here — see postmortem
- * 0001), complementing coding-agent's with-key e2e suites which prove the real
+ * real-Loader-path guard that the composed tree boots (see postmortem 0001;
+ * the app carries no `inject`, so its export SHAPE is pinned by the stdio-agent
+ * unit suite's unwrap assertion, not by a crash here),
+ * complementing coding-agent's with-key e2e suites which prove the real
  * product.
  */
 

examples/echo-agent/tests/echo.e2e.ts

@@ -13,11 +13,12 @@ import { afterEach, describe, expect, it } from 'vitest'
  *
  * This is the guard the per-file unit suite structurally cannot be: it drives
  * the `@deepseek-ai/dsh-stdio-agent` app plugin, the `@deepseek-ai/dsh-agent-core`
- * bundle it loads, the extracted `@deepseek-ai/dsh-ui-stdio` plugin, AND the
- * example-local `mock-llm.ts` / `echo-tool.ts` through their REAL load path, so
- * a broken plugin export shape (a stray `export default` that `unwrapExports`
- * would collapse, dropping `inject`/`Config`) fails here even though hand-mounted
- * unit tests stay green (see docs/postmortem/0001). It needs no API key — the
+ * bundle it loads, the app's in-package readline UI module, AND the
+ * example-local `mock-llm.ts` / `echo-tool.ts` through their REAL load path
+ * (see docs/postmortem/0001). The app itself carries no `inject`, so a stray
+ * `export default` would boot rather than crash here — the export SHAPE is
+ * pinned by the explicit unwrap assertion in the stdio-agent unit suite; this
+ * smoke proves the composed tree actually runs. It needs no API key — the
  * `mock-echo` adapter never touches the network — so it runs in the default e2e
  * gate.
  *

package.json

@@ -35,6 +35,7 @@
     "verify-doc-budgets": "tsx scripts/verify-doc-budgets.ts",
     "verify-node-next-types": "tsx scripts/verify-node-next-types.ts",
     "gen-cordis-catalog": "tsx scripts/gen-cordis-catalog.ts",
+    "gen-rfc-index": "tsx scripts/gen-rfc-index.ts",
     "verify-cordis-catalog": "tsx scripts/gen-cordis-catalog.ts --check",
     "gen-tool-catalog": "tsx scripts/gen-tool-catalog.ts",
     "verify-tool-catalog": "tsx scripts/gen-tool-catalog.ts --check",

packages/README.md

@@ -19,7 +19,7 @@ Packages are grouped by modular role at `packages/<group>/<pkg>/`. The group dir
 | [`hooks/`](hooks/README.md) | Hook bridges + the shared Claude Code / Codex wire-protocol library | Product — stable surface |
 | [`session-persistence/`](session-persistence/README.md) | Persistence capability family: the seam + JSONL/SQLite backends | Product — stable surface |
 | [`ui/`](ui/README.md) | Editor/client integration surfaces (the ACP bridge) + the app packages | Product — stable surface |
-| [`support/`](support/README.md) | Dev/test/example infrastructure (invariants, stdio UI, replay adapter) | Support — lower compatibility expectations |
+| [`support/`](support/README.md) | Dev/test/example infrastructure (invariants, replay adapter, subagent mock) | Support — lower compatibility expectations |
 | [`util/`](util/README.md) | Low-level zero-dependency utilities shared across groups (the `Branded<B>` primitive) | Support — small, stable, harness-dep-free |
 
 The split is the point: a package's group says whether it is part of the product API or support/test/example infrastructure, so release and removal decisions do not treat every package as an equal public contract. New packages join an existing group; adding a new top-level group is a deliberate act (extend the group READMEs and this table).

packages/bash/bash-local/README.md

@@ -12,6 +12,7 @@ Local-subprocess implementation of the `@deepseek-ai/dsh-bash` executor seam: `L
     timeoutMs: 120000          # default foreground timeout
     maxTimeoutMs: 600000       # cap for per-call overrides
     maxOutputBytes: 64000      # per-stream in-memory cap; overflow spills to disk
+    graceMs: 3000              # SIGTERM→SIGKILL escalation grace on kills
 ```
 
 ## Behavior (and where it came from)
@@ -19,7 +20,7 @@ Local-subprocess implementation of the `@deepseek-ai/dsh-bash` executor seam: `L
 Design surveyed against the bash tools of Claude Code, OpenCode, Codex, and pi; the notable choices:
 
 - **Spawn per call, no shell state** — every call is a fresh non-login `bash -c` (deterministic; no rc files). All four surveyed tools spawn per call. `XXX(stateful-shell)` in `src/run.ts` records the two proven stateful designs (Claude Code's cwd-only persistence; Codex's PTY exec sessions) for when real workflows demand them.
-- **Process-group kills with escalation** — children are spawned `detached` (own process group); kills send SIGTERM to the group, then SIGKILL after a 3s grace (OpenCode's escalation; pipelines and subshells die with the parent). ESRCH is tolerated; daemons that re-parent away from the group can still survive — same caveat as the surveyed tools.
+- **Process-group kills with escalation** — children are spawned `detached` (own process group); kills send SIGTERM to the group, then SIGKILL after the `graceMs` grace (default 3s — OpenCode's escalation; pipelines and subshells die with the parent). ESRCH is tolerated; daemons that re-parent away from the group can still survive — same caveat as the surveyed tools.
 - **Tail-keep truncation + spill files** — output beyond `maxOutputBytes` keeps the in-memory TAIL (errors/results cluster at the end — pi/OpenCode rationale) while the FULL stream is appended to a temp file whose path is reported when available. If the final spill close reports a delayed writeback failure, the executor still returns the tail but withholds the path rather than advertising a possibly incomplete file.
 - **Model-friendly env + credential scrub** — `process.env` minus credential-shaped vars (`*KEY*`/`*SECRET*`/`*TOKEN*`), then `NO_COLOR=1 TERM=dumb PAGER=cat GIT_PAGER=cat` (Codex's hardcoded set) so pagers and ANSI color don't garble results. This scrub is the security control that keeps the harness's *ambient* credentials out of a spawned command. A spec's `env` is merged LAST (after the scrub), so a caller's explicit entry — a value it already holds — wins even on a credential-shaped name. The spec's `stdin`, when supplied, is written to the child and closed; with none supplied, fd 0 is `/dev/null` — the exact pre-seam default, so a command that probes stdin's file type is unaffected. Both `env`/`stdin` are set by in-process plugins (the hooks bridges); the model-facing tool doesn't expose them. See [the bash-stdin-env RFC](../../../docs/rfc/implemented/architecture/2026-06-30-bash-stdin-env-trusted-plugin-surface.md).
 - **Background tasks** — `start()` returns immediately, no timeout applies (Claude Code detaches timeouts when backgrounding), `readOutput()` is incremental with whole-stream byte offsets, and disposal kills everything. The spec's opaque `owner` token is stored on the tracked task and returned by `ownerOf(id)` — the executor never interprets it (the consumer's access policy does), and because it lives with the task here it survives a `tool-bash` HMR reload.

packages/bash/bash-local/src/index.ts

@@ -17,7 +17,7 @@ import { Context } from 'cordis'
 import z from 'schemastery'
 import { BashExecutor, BashTaskId } from '@deepseek-ai/dsh-bash'
 import type { BashExecRequest, BashExecSpec, BashRunResult, BashTask, BashTaskRead, OwnerToken } from '@deepseek-ai/dsh-bash'
-import { runBash } from './run.ts'
+import { DEFAULT_GRACE_MS, runBash } from './run.ts'
 import type { RunInternals, RunningBash } from './run.ts'
 
 export { DEFAULT_GRACE_MS, ENV_OVERRIDES, killGroup, OutputCollector, runBash } from './run.ts'
@@ -33,6 +33,8 @@ export interface Config {
   maxTimeoutMs?: number
   /** Per-stream in-memory output cap; overflow spills to a temp file. */
   maxOutputBytes?: number
+  /** Grace period between the SIGTERM and the SIGKILL escalation on a kill. */
+  graceMs?: number
 }
 
 /** The shape after schemastery applied the defaults (cwd has none). */
@@ -57,7 +59,7 @@ interface TrackedTask extends BashTask {
  * Local-subprocess bash executor. Defaults follow the agent-tool survey
  * consensus: 120s default / 600s max timeout (Claude Code, OpenCode), 64KB
  * in-memory output with full-stream spill files (pi, OpenCode),
- * process-group SIGTERM→SIGKILL kills (OpenCode).
+ * process-group SIGTERM→SIGKILL kills with a 3s grace (OpenCode).
  */
 export class LocalBashExecutor extends BashExecutor {
   static Config: z<Config> = z.object({
@@ -65,11 +67,12 @@ export class LocalBashExecutor extends BashExecutor {
     timeoutMs: z.number().default(120_000),
     maxTimeoutMs: z.number().default(600_000),
     maxOutputBytes: z.number().default(64_000),
+    graceMs: z.number().default(DEFAULT_GRACE_MS),
   })
 
   private tasks = new Map<BashTaskId, TrackedTask>()
   private nextTaskId = 1
-  /** Test seam: timer/spill knobs forwarded to runBash. */
+  /** Test seam: spill knobs forwarded to runBash. */
   internals: RunInternals = {}
 
   /** Validated config (schemastery applied the defaults before construction). */
@@ -83,6 +86,7 @@ export class LocalBashExecutor extends BashExecutor {
     assertPositiveFinite('timeoutMs', this.config.timeoutMs)
     assertPositiveFinite('maxTimeoutMs', this.config.maxTimeoutMs)
     assertPositiveFinite('maxOutputBytes', this.config.maxOutputBytes)
+    assertPositiveFinite('graceMs', this.config.graceMs)
     ctx.effect(() => async () => {
       // Kill every live process group and WAIT for the processes to close so
       // nothing outlives the fiber (HMR safety) — a TERM-trapping child is
@@ -132,6 +136,7 @@ export class LocalBashExecutor extends BashExecutor {
       cwd: spec.workdir,
       timeoutMs: spec.timeoutMs,
       maxOutputBytes: this.config.maxOutputBytes,
+      graceMs: this.config.graceMs,
       signal: spec.signal,
       stdin: spec.stdin,
       env: spec.env,
@@ -150,6 +155,7 @@ export class LocalBashExecutor extends BashExecutor {
       cwd: spec.workdir,
       timeoutMs: 0,
       maxOutputBytes: this.config.maxOutputBytes,
+      graceMs: this.config.graceMs,
       signal: spec.signal,
       stdin: spec.stdin,
       env: spec.env,

packages/bash/bash-local/src/run.ts

@@ -73,6 +73,8 @@ export interface SpawnSpec {
   timeoutMs: number
   /** Per-stream in-memory cap; overflow spills to disk (tail kept in memory). */
   maxOutputBytes: number
+  /** Grace period between the SIGTERM and the SIGKILL escalation on a kill. */
+  graceMs: number
   /** Abort signal — kills the process group when fired. */
   signal?: AbortSignal | undefined
   /**
@@ -100,15 +102,13 @@ export interface SpawnOutcome {
   stderr: CollectedOutput
 }
 
-/** Injectable knobs so tests can exercise escalation/spill without long waits. */
+/** Injectable knobs so tests can exercise spill behavior without the OS tmpdir. */
 export interface RunInternals {
-  /** Grace period between SIGTERM and SIGKILL on the process group. */
-  graceMs?: number
   /** Directory for spill files (defaults to the OS temp dir). */
   spillDir?: string
 }
 
-/** Default SIGTERM→SIGKILL grace period (matches OpenCode's 3s). */
+/** Default SIGTERM→SIGKILL grace period (the `graceMs` config; matches OpenCode's 3s). */
 export const DEFAULT_GRACE_MS = 3_000
 
 let spillCounter = 0
@@ -292,7 +292,6 @@ export interface RunningBash {
  * no inherited shell state); revisit when real workflows demand it.
  */
 export function runBash(spec: SpawnSpec, internals: RunInternals = {}): RunningBash {
-  const graceMs = internals.graceMs ?? DEFAULT_GRACE_MS
   const spillDir = internals.spillDir ?? privateSpillDir()
 
   if (spec.signal?.aborted) {
@@ -331,7 +330,7 @@ export function runBash(spec: SpawnSpec, internals: RunInternals = {}): RunningB
   const kill = (): void => {
     if (graceTimer !== undefined) return // escalation already in flight
     killGroup(pid, 'SIGTERM')
-    graceTimer = setTimeout(() => { killGroup(pid, 'SIGKILL') }, graceMs)
+    graceTimer = setTimeout(() => { killGroup(pid, 'SIGKILL') }, spec.graceMs)
   }
 
   if (spec.timeoutMs > 0) {

packages/bash/bash-local/tests/executor.spec.ts

@@ -11,9 +11,10 @@ const spillDir = mkdtempSync(join(tmpdir(), 'dsh-bash-exec-spec-'))
 
 async function setup(config: ConstructorParameters<typeof LocalBashExecutor>[1] = {}) {
   const ctx = new Context()
-  await ctx.plugin(LocalBashExecutor, config)
+  // A short kill grace via the REAL config path, so escalation tests stay fast.
+  await ctx.plugin(LocalBashExecutor, { graceMs: 200, ...config })
   const bash = ctx.bash as LocalBashExecutor
-  bash.internals = { spillDir, graceMs: 200 }
+  bash.internals = { spillDir }
   return { ctx, bash }
 }
 
@@ -80,12 +81,22 @@ describe('LocalBashExecutor.run', () => {
     await expect(setup({ timeoutMs: Number.NaN })).rejects.toThrow(/timeoutMs/)
     await expect(setup({ maxTimeoutMs: 0 })).rejects.toThrow(/maxTimeoutMs/)
     await expect(setup({ maxOutputBytes: -1 })).rejects.toThrow(/maxOutputBytes/)
+    await expect(setup({ graceMs: 0 })).rejects.toThrow(/graceMs/)
 
     const { bash } = await setup()
     expect(() => bash.resolve({ command: 'true', timeoutMs: Number.NaN })).toThrow(/request\.timeoutMs/)
     expect(() => bash.resolve({ command: 'true', timeoutMs: -1 })).toThrow(/request\.timeoutMs/)
   })
 
+  it('kill escalation uses the configured graceMs (a TERM-trapping task dies by SIGKILL)', async () => {
+    const { bash } = await setup() // setup pins graceMs: 200 via config
+    const task = bash.start(bash.resolve({ command: 'trap \'\' TERM; sleep 60' }))
+    await new Promise(resolve => setTimeout(resolve, 100))
+    bash.kill(task.id)
+    await task.done
+    expect(task.signal).toBe('SIGKILL')
+  })
+
   it('per-call timeout takes precedence under the cap and kills on expiry', async () => {
     const { bash } = await setup({ timeoutMs: 60_000 })
     const result = await bash.run(bash.resolve({ command: 'sleep 60', timeoutMs: 100 }))
@@ -271,9 +282,9 @@ describe('LocalBashExecutor background tasks', () => {
 
   it('disposing with already-finished tasks only kills the running ones', async () => {
     const ctx = new Context()
-    const fiber = await ctx.plugin(LocalBashExecutor, {})
+    const fiber = await ctx.plugin(LocalBashExecutor, { graceMs: 200 })
     const bash = ctx.bash as LocalBashExecutor
-    bash.internals = { spillDir, graceMs: 200 }
+    bash.internals = { spillDir }
 
     const finished = bash.start(bash.resolve({ command: 'true' }))
     await finished.done
@@ -288,9 +299,9 @@ describe('LocalBashExecutor background tasks', () => {
 
   it('disposing the executor fiber kills running tasks (no orphans)', async () => {
     const ctx = new Context()
-    const fiber = await ctx.plugin(LocalBashExecutor, {})
+    const fiber = await ctx.plugin(LocalBashExecutor, { graceMs: 200 })
     const bash = ctx.bash as LocalBashExecutor
-    bash.internals = { spillDir, graceMs: 200 }
+    bash.internals = { spillDir }
     const listener = vi.fn()
     bash.onTaskDone(listener)
 
@@ -337,9 +348,9 @@ describe('review fixes: lifecycle hardening', () => {
 
   it('dispose AWAITS a TERM-trapping process (SIGKILL escalation included)', async () => {
     const ctx = new Context()
-    const fiber = await ctx.plugin(LocalBashExecutor, {})
+    const fiber = await ctx.plugin(LocalBashExecutor, { graceMs: 200 })
     const bash = ctx.bash as LocalBashExecutor
-    bash.internals = { spillDir, graceMs: 200 }
+    bash.internals = { spillDir }
 
     const task = bash.start(bash.resolve({ command: 'trap \'\' TERM; sleep 60' }))
     await new Promise(resolve => setTimeout(resolve, 100))

packages/bash/bash-local/tests/run.spec.ts

@@ -28,6 +28,7 @@ function spec(command: string, overrides: Partial<Parameters<typeof runBash>[0]>
     cwd: process.cwd(),
     timeoutMs: 0,
     maxOutputBytes: 64_000,
+    graceMs: 3_000,
     ...overrides,
   }
 }
@@ -106,7 +107,7 @@ describe('runBash', () => {
   })
 
   it('escalates to SIGKILL when SIGTERM is trapped', async () => {
-    const running = runBash(spec('trap \'\' TERM; echo ready; sleep 60'), { graceMs: 200 })
+    const running = runBash(spec('trap \'\' TERM; echo ready; sleep 60', { graceMs: 200 }))
     await waitForStdout(running, 'ready\n')
     running.kill()
     const result = await running.done

packages/bash/bash/src/index.ts

@@ -77,16 +77,32 @@ export abstract class BashExecutor extends Service {
    * call this, then pass the result to {@link run}/{@link start} — keeping
    * defaulting in the implementation that owns the config while the seam type
    * stays explicit (no hidden `?? default` inside run/start).
+   * @param request - the caller's request; omitted fields get this
+   *   implementation's defaults, capped fields are clamped.
+   * @returns the fully-specified spec to hand to {@link run}/{@link start}.
    */
   abstract resolve(request: BashExecRequest): BashExecSpec
 
-  /** Run a command in the foreground; resolves when it finishes. */
+  /**
+   * Run a command in the foreground; resolves when it finishes.
+   * @param spec - a resolved spec from {@link resolve}, never a raw request.
+   * @returns the outcome; nonzero exits, timeout kills, and abort kills
+   *   resolve with a descriptive result rather than reject.
+   */
   abstract run(spec: BashExecSpec): Promise<BashRunResult>
 
-  /** Start a background task and return its handle immediately. */
+  /**
+   * Start a background task and return its handle immediately.
+   * @param spec - a resolved spec from {@link resolve}, never a raw request.
+   * @returns the live task handle; completion fires {@link onTaskDone}.
+   */
   abstract start(spec: BashExecSpec): BashTask
 
-  /** Look up a background task by id. */
+  /**
+   * Look up a background task by id.
+   * @param id - the task id to look up.
+   * @returns the tracked task, or undefined for an id this executor never issued.
+   */
   abstract get(id: BashTaskId): BashTask | undefined
 
   /**
@@ -101,24 +117,38 @@ export abstract class BashExecutor extends Service {
    * loudly at the subsequent {@link readOutput}/{@link kill} ("unknown task").
    * Storing ownership in the executor (disposed with ITS fiber) — not in the
    * tool plugin — is what makes ownership survive a `tool-bash` HMR reload.
+   * @param id - the background task id to look up ownership for.
+   * @returns the token recorded at start, verbatim; undefined for an unknown
+   *   id or a known-but-ownerless task.
    */
   abstract ownerOf(id: BashTaskId): OwnerToken | undefined
 
-  /** All tracked background tasks (insertion order). */
+  /**
+   * All tracked background tasks (insertion order).
+   * @returns every task this executor started, running or finished.
+   */
   abstract list(): BashTask[]
 
-  /** Read output produced since the previous read. Throws for unknown ids. */
+  /**
+   * Read output produced since the previous read. Throws for unknown ids.
+   * @param id - the task to read from.
+   * @returns the incremental read; consecutive reads never re-deliver output.
+   */
   abstract readOutput(id: BashTaskId): BashTaskRead
 
   /**
    * Kill a running background task. Returns false when it had already
    * finished (no-op). Throws for unknown ids.
+   * @param id - the task to kill.
+   * @returns true when this call killed it, false when it had already finished.
    */
   abstract kill(id: BashTaskId): boolean
 
   /**
    * Register a background-task completion listener (disposed with the
    * calling fiber). Listeners never fire after this service is disposed.
+   * @param listener - called exactly once per task completion.
+   * @returns the disposer that unregisters the listener.
    */
   onTaskDone(listener: BashTaskListener): () => void {
     const dispose = this.ctx.effect(() => {

packages/bash/tool-bash/tests/tools.spec.ts

@@ -21,8 +21,8 @@ async function setup() {
   await ctx.plugin(SystemPrompt)
   await ctx.plugin(ToolRegistry)
   await ctx.plugin(AgentRegistry)
-  await ctx.plugin(LocalBashExecutor, { timeoutMs: 10_000 })
-  ;(ctx.bash as LocalBashExecutor).internals = { spillDir, graceMs: 200 }
+  await ctx.plugin(LocalBashExecutor, { timeoutMs: 10_000, graceMs: 200 })
+  ;(ctx.bash as LocalBashExecutor).internals = { spillDir }
   await ctx.plugin(ToolBash)
   return ctx
 }
@@ -184,8 +184,8 @@ describe('bash tool', () => {
     const ctx = new Context()
     await ctx.plugin(SystemPrompt)
     await ctx.plugin(ToolRegistry)
-    await ctx.plugin(LocalBashExecutor, { maxOutputBytes: 100 })
-    ;(ctx.bash as LocalBashExecutor).internals = { spillDir, graceMs: 200 }
+    await ctx.plugin(LocalBashExecutor, { maxOutputBytes: 100, graceMs: 200 })
+    ;(ctx.bash as LocalBashExecutor).internals = { spillDir }
     await ctx.plugin(ToolBash)
     const result = await call(ctx, 'bash', { command: 'for i in $(seq 1 100); do printf "line-%04d\\n" $i; done', description: 'test command' })
     expect(text(result)).toContain('[output truncated; full output: ')
@@ -316,8 +316,8 @@ describe('background tools', () => {
     const ctx = new Context()
     await ctx.plugin(SystemPrompt)
     await ctx.plugin(ToolRegistry)
-    await ctx.plugin(LocalBashExecutor, { maxOutputBytes: 100 })
-    ;(ctx.bash as LocalBashExecutor).internals = { spillDir, graceMs: 200 }
+    await ctx.plugin(LocalBashExecutor, { maxOutputBytes: 100, graceMs: 200 })
+    ;(ctx.bash as LocalBashExecutor).internals = { spillDir }
     await ctx.plugin(ToolBash)
 
     const started = await call(ctx, 'bash', { command: 'for i in $(seq 1 200); do printf "line-%04d\\n" $i; done', description: 'test command', run_in_background: true })
@@ -568,8 +568,8 @@ describe('background task ownership (cross-session isolation)', () => {
     const ctx = new Context()
     await ctx.plugin(SystemPrompt)
     await ctx.plugin(ToolRegistry)
-    await ctx.plugin(LocalBashExecutor, { timeoutMs: 10_000 })
-    ;(ctx.bash as LocalBashExecutor).internals = { spillDir, graceMs: 200 }
+    await ctx.plugin(LocalBashExecutor, { timeoutMs: 10_000, graceMs: 200 })
+    ;(ctx.bash as LocalBashExecutor).internals = { spillDir }
     const fiber = await ctx.plugin(ToolBash)
 
     const a = fakeAgent('sess-a')
@@ -824,7 +824,7 @@ describe('tool-owned UI presentation (presentCall / presentResult)', () => {
     const ctx = await setup()
     const present = ctx.tools.get('bash')!.presentResult!(
       { command: 'x', description: 'x' },
-      { content: [{ type: 'image', url: 'https://x/y.png' }], isError: false },
+      { content: [{ type: 'reasoning', text: 'unexpected' }], isError: false },
     )
     expect(present).toBeUndefined()
   })

packages/compact/README.md

@@ -5,7 +5,7 @@ A three-package capability seam (see [capability seams](../../docs/rfc/implement
 | Package | Role | ctx key |
 |---|---|---|
 | `compact/` | Abstract compaction seam (interface + `compact/*` events + `CompactionResult`) | `ctx.compact` |
-| `compact-basic/` | A backend: char/4 estimation + token-budget retention + `llm.stream()` summarization | (registers `ctx.compact`) |
+| `compact-basic/` | A backend: chars-per-token estimation (`charsPerToken`, default 4) + token-budget retention + `llm.stream()` summarization | (registers `ctx.compact`) |
 | `tool-compact/` (deferred) | Model-facing `/compact` tool over `ctx.compact` | (registers on `ctx.tools`) |
 
 The interface lives at `compact/compact/`, the backend at `compact/compact-basic/`. Unlike the bash seam, it depends on `dsh-session` and `dsh-llm` — its verbs are defined over a `Session` and its output is the `ContentBlock` vocabulary, so the contract cannot be expressed without naming them. That deviation from the "interface depends only on cordis" guidance is intentional and recorded in the [compaction capability-seam RFC](../../docs/rfc/implemented/feature/2026-06-18-compaction-capability-seam.md). A tokenizer- or template-based backend would replace `compact-basic` without touching the interface or the tool.

packages/compact/compact-basic/README.md

@@ -1,6 +1,6 @@
 # @deepseek-ai/dsh-compact-basic
 
-The **basic compaction backend**: a `BasicCompactService` implementing the `@deepseek-ai/dsh-compact` seam with a char/4 token heuristic, token-budget retention, and summarization routed through the agent request pipeline.
+The **basic compaction backend**: a `BasicCompactService` implementing the `@deepseek-ai/dsh-compact` seam with a chars-per-token heuristic (the `charsPerToken` config, default 4), token-budget retention, and summarization routed through the agent request pipeline.
 
 This is the implementation tier of the compaction capability — see the [interface package](../compact/README.md) for the seam and the [capability-seam RFC](../../../docs/rfc/implemented/feature/2026-06-18-compaction-capability-seam.md) for the design.
 
@@ -8,10 +8,10 @@ This is the implementation tier of the compaction capability — see the [interf
 
 The abstract contract states only WHAT compaction does; this backend owns every HOW decision:
 
-- **Token estimation** — `estimateContentTokens()`: char/4 with per-block structural overhead (`text`/`reasoning` = `ceil(len/4) + 4`, `tool-call` from name + arguments, `tool-result` recursive, `image` = 85, unknown blocks via JSON length).
+- **Token estimation** — `estimateContentTokens()`: chars divided by the `charsPerToken` config (default 4) with per-block structural overhead (`text`/`reasoning` = `ceil(len/charsPerToken) + 4`, `tool-call` from name + arguments, `tool-result` recursive, unknown blocks via JSON length).
 - **Retention policy** — `compactIfNeeded()` walks the surface nodes tail→head summing per-node token estimates, and retains the smallest tail-run of WHOLE units (a closed step, or a single no-step node such as a pre-step `user/message` or inter-step `steering/message`) whose total reaches `retainTokens`; everything older is compacted. Retention is **turn-agnostic** — turn boundaries play no role, so a single runaway turn that alone exceeds the window compacts its OWN early closed steps rather than being retained verbatim (the failure mode that motivated dropping turn-protection: a tool-heavy turn must stay compactable or the harness dies exactly when compaction is needed). The only structural guard is **tool-pairing balance**: the compacted region's edges are balanced cuts on the surface (no unanswered tool-call crosses either edge), so it never splits a step's `assistant/message` tool-calls from their `tool/result`s. When the only compactable content left is an un-splittable open tail step, it declines (returns `null`) and retries once an older step closes. **Single-unit overflow is out of scope, by design**: if one retained unit (a single closed step, or a large pasted `user/message`) ALONE exceeds the budget, compaction cannot help and the call may go out over-budget — bounding an individual unit's size is a separate concern. `compactRegion()` enforces tool-pairing balance strictly, throwing on a boundary that would split a step. `dsh-session` exports `isToolPairingBalanced` for the check.
 - **Dynamic convergence** — no static summary-length config pretends to bound what the model will write. If framing/estimator/system overhead leaves the compacted surface above threshold, `compactIfNeeded()` re-compacts the head checkpoint up to `compactionRetries` extra times; if it still cannot get below threshold, it throws. A summary whose estimated stored size is not smaller than the shadowed content fails closed before it mutates the surface.
-- **Summarization** — `summarize()`: a `GenerateOptions` request assembled via `BlockAssembler` with a fixed system prompt that asks for a structured checkpoint (Primary Request and Intent · Key Technical Concepts · Files and Code · Errors and Fixes · Pending Tasks · Current Work · Next Step · Critical Context), every section mandatory, exact paths/commands/identifiers preserved. The request runs through the `agent/request` waterfall before `ctx.llm.stream()`, so router agents that choose the concrete model there also route compaction summaries. `maxTokens` is the provider-side generation cap; only text blocks from the model's reply are kept before the checkpoint is stored (reasoning is dropped so private chain-of-thought never leaks into the durable summary, and a stray `tool-call` is dropped so the synthesized `user/message` summary cannot land an orphaned call with no matching `tool-result`). The compacted region is flattened to a plain-text transcript first: text and reasoning contribute their text, and every non-text block (image, tool-call, tool-result, plugin-added types) contributes a type-tagged placeholder (`[image]`, `[tool-call: name(args)]`, …) so the summarizer is told what existed rather than silently dropping it.
+- **Summarization** — `summarize()`: a `GenerateOptions` request assembled via `BlockAssembler` with a fixed system prompt that asks for a structured checkpoint (Primary Request and Intent · Key Technical Concepts · Files and Code · Errors and Fixes · Pending Tasks · Current Work · Next Step · Critical Context), every section mandatory, exact paths/commands/identifiers preserved. The request runs through the `agent/request` waterfall before `ctx.llm.stream()`, so router agents that choose the concrete model there also route compaction summaries. `maxTokens` is the provider-side generation cap; only text blocks from the model's reply are kept before the checkpoint is stored (reasoning is dropped so private chain-of-thought never leaks into the durable summary, and a stray `tool-call` is dropped so the synthesized `user/message` summary cannot land an orphaned call with no matching `tool-result`). The compacted region is flattened to a plain-text transcript first: text and reasoning contribute their text, and every non-text block (tool-call, tool-result, plugin-added types) contributes a type-tagged placeholder (`[tool-call: name(args)]`, `[tool-result: …]`, …) so the summarizer is told what existed rather than silently dropping it.
 - **Checkpoint framing** — the raw summary is not landed directly. `compactRegion()` wraps it in a checkpoint preamble (so a resuming model reads it as a checkpoint, not a fresh user request, and builds on the captured context rather than restating it) plus `<compacted-summary>…</compacted-summary>` tags. Because region compaction can be invoked manually, a surface may hold several checkpoints, so the framing does not claim everything after it is recent or verbatim. The tags make a prior checkpoint detectable in the transcript on the next compaction cycle: the summarization prompt then instructs the model to merge it in place (preserve still-true facts, drop stale ones) rather than re-summarize it verbatim — a cheap incremental merge that needs no extra log/event machinery. The unframed summary stays on the `compact/summary` provenance event.
 - **Surface mutation** — `compactRegion()` appends the `compact/start` → `compact/summary` → `compact/end` log records and the single `user/message` replace node carrying the framed summary (see the interface README).
 - **Auto-compaction** — an `agent/pre-step` listener delegates to `compactIfNeeded()` before every step (not just a turn's first — a tool-heavy turn grows the surface mid-turn, so a runaway turn still compacts, and per-step firing is the only moment to rescue it before overflow). `agent/pre-step` is a serial (awaited, in-order) surface-mutation checkpoint that fires after `turn/start` and BEFORE the step opens (`step/start`) and its request history is derived, so compaction mutates the surface — with its log-only `compact/*` records landing cleanly outside any step — and the loop derives once from the result: no double-derive, and the listener cannot see (or need to rewrite) an already-assembled `messages` array. The listener owns no threshold logic of its own (the single token-pressure check lives in `compactIfNeeded()`); because Cordis `serial` bails early on non-void return values, the listener returns `void` and does not use the dispatcher's bail channel as a veto surface.
@@ -32,6 +32,7 @@ Every knob is **required** except `auto` — there is no concrete data yet to ju
 | `maxTokens` | yes | Provider generation cap for the summarization call; may include reasoning tokens. |
 | `compactionRetries` | yes | Extra compaction attempts after the first if the compacted surface remains over threshold. |
 | `auto` | no (default `true`) | Register the `agent/pre-step` auto-compaction listener. Set `false` for manual-only. |
+| `charsPerToken` | no (default `4`) | Token-estimator text density (estimated tokens = chars / `charsPerToken`; may be fractional). The default suits English text; CJK-heavy deployments should set ~1-2 or the estimate undershoots several-fold and compaction fires too late. |
 
 ## Usage
 

packages/compact/compact-basic/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@deepseek-ai/dsh-compact-basic",
-  "description": "Basic compaction backend (char/4 token estimation + token-budget retention + llm.generate() summarization) for the DeepSeek Harness",
+  "description": "Basic compaction backend (chars-per-token estimation + token-budget retention + llm.generate() summarization) for the DeepSeek Harness",
   "version": "0.0.1",
   "private": true,
   "type": "module",

packages/compact/compact-basic/src/index.ts

@@ -2,7 +2,8 @@
  * `BasicCompactService`: the first implementation of the
  * `@deepseek-ai/dsh-compact` seam. It owns the entire compaction strategy:
  *
- * - **Token estimation** — char/4 heuristic with per-block structural overhead.
+ * - **Token estimation** — chars/`charsPerToken` heuristic (config, default 4)
+ *   with per-block structural overhead.
  * - **Retention policy** — walk surface nodes tail→head, keep recent nodes up
  *   to a token budget, compact everything older. The cutoff is snapped forward
  *   to the next balanced tool-pairing boundary so a compacted region never
@@ -44,9 +45,6 @@ export { resolveConfig } from './types.ts'
 /** Per-block structural overhead for JSON framing / type tag. */
 const BLOCK_OVERHEAD = 4
 
-/** Heuristic token count for an image block (~85 tokens for low-res URL). */
-const IMAGE_TOKEN_COST = 85
-
 /** Role-field framing overhead added per message in {@link BasicCompactService.estimateTokens}. */
 const ROLE_OVERHEAD = 4
 
@@ -148,9 +146,11 @@ function finishError(finish: FinishReason): Error | undefined {
 }
 
 /**
- * Basic, dependency-light compaction backend. Defaults target a 128K context
- * window, compacting at 80% utilization and retaining ~20K tokens of recent
- * context.
+ * Basic, dependency-light compaction backend: estimates the surface's token
+ * footprint, summarizes the stale prefix through the model, and shadows it
+ * behind a durable checkpoint. Every threshold/budget knob is required config
+ * ({@link BasicCompactConfig}); the estimator's text density is the
+ * `charsPerToken` knob.
  */
 export class BasicCompactService extends CompactService {
   static inject = ['llm']
@@ -207,36 +207,36 @@ export class BasicCompactService extends CompactService {
 
   // ---- Token estimation (overridable hooks) ----
 
-  // TODO: char/4 is a coarse heuristic. Replace with an exact count — a real
-  // tokenizer, or the provider's post-response `usage` (input tokens) fed back
-  // as a correction — so threshold decisions match the model's actual budget.
+  // TODO: chars/charsPerToken is a coarse heuristic. Replace with an exact
+  // count — a real tokenizer, or the provider's post-response `usage` (input
+  // tokens) fed back as a correction — so threshold decisions match the
+  // model's actual budget.
   /**
-   * Estimate the token count of content blocks — char/4 with per-block
-   * overhead. Override in a subclass to plug in a real tokenizer.
+   * Estimate the token count of content blocks — chars divided by the
+   * `charsPerToken` config, with per-block overhead. Override in a subclass to
+   * plug in a real tokenizer.
    */
   estimateContentTokens(blocks: readonly ContentBlock[]): number {
+    const { charsPerToken } = this.config
     let tokens = 0
     for (const block of blocks) {
       switch (block.type) {
         case 'text':
         case 'reasoning':
-          tokens += Math.ceil(block.text.length / 4) + BLOCK_OVERHEAD
+          tokens += Math.ceil(block.text.length / charsPerToken) + BLOCK_OVERHEAD
           break
         case 'tool-call':
-          tokens += Math.ceil(block.name.length / 4)
-            + Math.ceil(block.arguments.length / 4)
+          tokens += Math.ceil(block.name.length / charsPerToken)
+            + Math.ceil(block.arguments.length / charsPerToken)
             + BLOCK_OVERHEAD
           break
         case 'tool-result':
           tokens += this.estimateContentTokens(block.content) + BLOCK_OVERHEAD
           break
-        case 'image':
-          tokens += IMAGE_TOKEN_COST
-          break
         default:
           // Unknown block types (merge-extensible ContentBlockMap):
           // estimate conservatively via JSON stringify.
-          tokens += BLOCK_OVERHEAD + Math.ceil(JSON.stringify(block).length / 4)
+          tokens += BLOCK_OVERHEAD + Math.ceil(JSON.stringify(block).length / charsPerToken)
       }
     }
     return tokens
@@ -266,7 +266,7 @@ export class BasicCompactService extends CompactService {
       total += this.estimateContentTokens(msg.content)
       total += ROLE_OVERHEAD
     }
-    if (systemPrompt) total += Math.ceil(systemPrompt.length / 4)
+    if (systemPrompt) total += Math.ceil(systemPrompt.length / this.config.charsPerToken)
     return total
   }
 
@@ -706,10 +706,10 @@ export class BasicCompactService extends CompactService {
   /**
    * Render content blocks to a single plain-text string for the summarization
    * prompt. Text and reasoning contribute their text; every other block type
-   * contributes a type-tagged placeholder (`[image]`, `[tool-call: name(args)]`,
-   * …) so the summarizer is told what non-text content existed in the region
-   * rather than silently losing it. Blocks join with newlines; empty-text
-   * blocks contribute nothing.
+   * contributes a type-tagged placeholder (`[tool-call: name(args)]`,
+   * `[tool-result: …]`, …) so the summarizer is told what non-text content
+   * existed in the region rather than silently losing it. Blocks join with
+   * newlines; empty-text blocks contribute nothing.
    */
   private _blocksToText(blocks: readonly ContentBlock[]): string {
     const parts: string[] = []
@@ -729,9 +729,6 @@ export class BasicCompactService extends CompactService {
           parts.push(inner ? `[tool-result: ${inner}]` : '[tool-result]')
           break
         }
-        case 'image':
-          parts.push('[image]')
-          break
         // ContentBlockMap is merge-extensible — render an unknown block as a
         // bare type-tagged placeholder so a plugin-added block type is still
         // signalled to the summarizer rather than dropped.

packages/compact/compact-basic/src/types.ts

@@ -10,10 +10,12 @@
  */
 
 /**
- * Backend configuration. Every knob is REQUIRED except `auto`: there is no
- * concrete data yet to justify default thresholds/budgets, so a consumer must
- * state each value explicitly rather than inherit a guessed default. `auto`
- * alone defaults to `true` (auto-compaction is the intended posture).
+ * Backend configuration. Every knob is REQUIRED except `auto` and
+ * `charsPerToken`: there is no concrete data yet to justify default
+ * thresholds/budgets, so a consumer must state each value explicitly rather
+ * than inherit a guessed default. `auto` alone defaults to `true`
+ * (auto-compaction is the intended posture), and `charsPerToken` defaults to
+ * the English-text heuristic its estimator was calibrated on.
  */
 export interface BasicCompactConfig {
   /** Context window size in tokens. */
@@ -30,13 +32,21 @@ export interface BasicCompactConfig {
   compactionRetries: number
   /** Enable automatic compaction on the `agent/pre-step` seam (default true). */
   auto?: boolean
+  /**
+   * Text density for the token estimator: estimated tokens = chars /
+   * `charsPerToken`. Defaults to 4 (typical English text). A CJK-heavy
+   * deployment should set ~1-2 — CJK runs at roughly 1-2 chars per token, so
+   * the default UNDERestimates several-fold and compaction fires far too late.
+   * May be fractional.
+   */
+  charsPerToken?: number
 }
 
-/** Resolved config with `auto` defaulted. */
+/** Resolved config with `auto` and `charsPerToken` defaulted. */
 export type ResolvedConfig = Required<BasicCompactConfig>
 
 /**
- * Default `auto` when unset and reject nonsensical numeric knobs.
+ * Default `auto`/`charsPerToken` when unset and reject nonsensical numeric knobs.
  *
  * Convergence is not a static config invariant: provider generation caps can be
  * spent on hidden or surfaced reasoning tokens, and the model may emit a summary
@@ -46,13 +56,14 @@ export type ResolvedConfig = Required<BasicCompactConfig>
  * throwing if the surface still exceeds the threshold.
  */
 export function resolveConfig(config: BasicCompactConfig): ResolvedConfig {
-  const resolved: ResolvedConfig = { auto: true, ...config }
+  const resolved: ResolvedConfig = { auto: true, charsPerToken: 4, ...config }
 
   assertPositiveInteger('contextWindow', resolved.contextWindow)
   assertRatio('thresholdRatio', resolved.thresholdRatio)
   assertNonNegativeInteger('retainTokens', resolved.retainTokens)
   assertPositiveInteger('maxTokens', resolved.maxTokens)
   assertNonNegativeInteger('compactionRetries', resolved.compactionRetries)
+  assertPositiveFinite('charsPerToken', resolved.charsPerToken)
   if (typeof resolved.summarizationModel !== 'string') {
     throw new Error('BasicCompactConfig: summarizationModel must be a string.')
   }
@@ -74,6 +85,12 @@ function assertNonNegativeInteger(name: string, value: number): void {
   }
 }
 
+function assertPositiveFinite(name: string, value: number): void {
+  if (typeof value !== 'number' || !Number.isFinite(value) || value <= 0) {
+    throw new Error(`BasicCompactConfig: ${name} (${value}) must be a positive finite number.`)
+  }
+}
+
 function assertRatio(name: string, value: number): void {
   if (typeof value !== 'number' || !Number.isFinite(value) || value <= 0 || value > 1) {
     throw new Error(`BasicCompactConfig: ${name} (${value}) must be a number in (0, 1].`)

packages/compact/compact-basic/tests/compact-basic.spec.ts

@@ -811,15 +811,23 @@ describe('BasicCompactService token estimation (char/4 heuristic)', () => {
     ])).toBe(10)
   })
 
-  it('estimates image blocks at fixed 85 tokens', () => {
-    const svc = new BasicCompactService(new Context(), cfg({ auto: false }))
-    expect(svc.estimateContentTokens([{ type: 'image', url: 'https://example.com/img.png' }])).toBe(85)
-  })
-
   it('returns 0 for empty content blocks', () => {
     const svc = new BasicCompactService(new Context(), cfg({ auto: false }))
     expect(svc.estimateContentTokens([])).toBe(0)
   })
+
+  it('honors a configured charsPerToken (fractional densities included)', () => {
+    // 'this is a somewhat longer text block' = 36 chars.
+    const blocks: ContentBlock[] = [{ type: 'text', text: 'this is a somewhat longer text block' }]
+    // charsPerToken 2: ceil(36/2)+4 = 22 — a CJK-density config doubles the estimate.
+    const dense = new BasicCompactService(new Context(), cfg({ auto: false, charsPerToken: 2 }))
+    expect(dense.estimateContentTokens(blocks)).toBe(22)
+    // Fractional density is legal: ceil(36/1.5)+4 = 28.
+    const fractional = new BasicCompactService(new Context(), cfg({ auto: false, charsPerToken: 1.5 }))
+    expect(fractional.estimateContentTokens(blocks)).toBe(28)
+    // The system-prompt term scales with the same knob: 36-char prompt at density 2 → ceil(36/2) = 18.
+    expect(dense.estimateTokens([], 'this is a somewhat longer text block')).toBe(18)
+  })
 })
 
 describe('BasicCompactService HMR safety', () => {
@@ -862,6 +870,10 @@ describe('BasicCompactService config validation', () => {
     )).toThrow(/summarizationModel must be a string/)
     expect(() => new BasicCompactService(new Context(), cfg({ auto: 'no' } as unknown as Partial<BasicCompactConfig>)))
       .toThrow(/auto must be a boolean/)
+    expect(() => new BasicCompactService(new Context(), cfg({ auto: false, charsPerToken: 0 })))
+      .toThrow(/charsPerToken .* positive finite number/)
+    expect(() => new BasicCompactService(new Context(), cfg({ auto: false, charsPerToken: Number.NaN })))
+      .toThrow(/charsPerToken .* positive finite number/)
   })
 
   it('accepts a large retain budget because convergence is enforced dynamically', () => {
@@ -1324,7 +1336,7 @@ describe('BasicCompactService edge cases', () => {
     s.append('assistant/message', {
       turn: 1, step: 1,
       content: [
-        { type: 'tool-result', toolCallId: CallId('n1'), content: [{ type: 'image', url: 'https://x/n.png' }] },
+        { type: 'tool-result', toolCallId: CallId('n1'), content: [{ type: 'chart', data: 'x' } as unknown as ContentBlock] },
         { type: 'custom-widget', payload: 'x' } as unknown as ContentBlock,
         { type: 'tool-call', id: CallId('b1'), name: 'bash', arguments: '{}' },
       ],
@@ -1343,7 +1355,7 @@ describe('BasicCompactService edge cases', () => {
     const nodes = s.surface.nodes
     await compactRegion(svc, s, nodes[0]!.seq, nodes[nodes.length - 1]!.seq, 'm')
     const { text } = svc.summarizeCalls[0]!
-    expect(text).toContain('[tool-result: [image]]') // nested tool-result with content
+    expect(text).toContain('[tool-result: [chart]]') // nested tool-result with content
     expect(text).toContain('[custom-widget]') // unknown block placeholder
     expect(text).toContain('Tool result (call b1): [tool-result]') // empty nested → bare placeholder
   })
@@ -1510,25 +1522,28 @@ describe('BasicCompactService edge cases', () => {
   it('renders non-text blocks as type-tagged placeholders across all message kinds', async () => {
     const svc = createTestService()
     const s = new Session(SessionId('placeholders'))
+    // A plugin-added block type (merge-extensible ContentBlockMap) — the
+    // placeholder path must cover every message kind, not just assistant.
+    const chart = (id: string): ContentBlock => ({ type: 'chart', data: id } as unknown as ContentBlock)
     s.append('turn/start', { turn: 1, trigger: { kind: 'message', source: { kind: 'user' } } })
     s.append('step/start', { turn: 1, step: 1 })
-    // user/message with only an image block → '[image]' placeholder.
-    s.append('user/message', { content: [{ type: 'image', url: 'https://x/y.png' }], source: { kind: 'user' } }, { surfaceOp: 'append' })
-    // assistant/message with an image block AND the tool-call its tool/result
-    // answers (so the surface is tool-pairing balanced) → '[image]' placeholder.
+    // user/message with only a plugin-added block → '[chart]' placeholder.
+    s.append('user/message', { content: [chart('y')], source: { kind: 'user' } }, { surfaceOp: 'append' })
+    // assistant/message with a plugin-added block AND the tool-call its
+    // tool/result answers (so the surface is tool-pairing balanced).
     s.append('assistant/message', {
       turn: 1, step: 1,
       content: [
-        { type: 'image', url: 'https://x/z.png' },
+        chart('z'),
         { type: 'tool-call', id: CallId('e1'), name: 'bash', arguments: '{}' },
       ],
     }, { surfaceOp: 'append' })
-    // tool/result with an image block → '[image]' placeholder.
+    // tool/result with a plugin-added block → '[chart]' placeholder.
     s.append('tool/call', { turn: 1, step: 1, callId: CallId('e1'), name: 'bash', arguments: '{}' })
-    s.append('tool/result', { turn: 1, step: 1, callId: CallId('e1'), content: [{ type: 'image', url: 'https://x/r.png' }], isError: false }, { surfaceOp: 'append' })
-    // context/message and steering/message with image content.
-    s.append('context/message', { content: [{ type: 'image', url: 'https://x/c.png' }], source: { kind: 'user' } }, { surfaceOp: 'append' })
-    s.append('steering/message', { turn: 1, content: [{ type: 'image', url: 'https://x/s.png' }], source: { kind: 'user' } }, { surfaceOp: 'append' })
+    s.append('tool/result', { turn: 1, step: 1, callId: CallId('e1'), content: [chart('r')], isError: false }, { surfaceOp: 'append' })
+    // context/message and steering/message with plugin-added content.
+    s.append('context/message', { content: [chart('c')], source: { kind: 'user' } }, { surfaceOp: 'append' })
+    s.append('steering/message', { turn: 1, content: [chart('s')], source: { kind: 'user' } }, { surfaceOp: 'append' })
     s.append('step/end', { turn: 1, step: 1 })
     s.append('turn/end', { turn: 1, reason: { kind: 'completed' } })
     s.append('turn/start', { turn: 2, trigger: { kind: 'message', source: { kind: 'user' } } })
@@ -1537,11 +1552,11 @@ describe('BasicCompactService edge cases', () => {
     await compactRegion(svc, s, nodes[0]!.seq, nodes[nodes.length - 1]!.seq, 'm')
     const { text } = svc.summarizeCalls[0]!
     // Every non-text block surfaces as a placeholder rather than being dropped.
-    expect(text).toContain('User: [image]')
-    expect(text).toContain('Assistant: [image]')
-    expect(text).toContain('Tool result (call e1): [image]')
-    expect(text).toContain('[Context: [image]]')
-    expect(text).toContain('[Steering: [image]]')
+    expect(text).toContain('User: [chart]')
+    expect(text).toContain('Assistant: [chart]')
+    expect(text).toContain('Tool result (call e1): [chart]')
+    expect(text).toContain('[Context: [chart]]')
+    expect(text).toContain('[Steering: [chart]]')
   })
 
 })

packages/compact/compact/README.md

@@ -7,7 +7,7 @@ This package is the interface tier of the compaction capability, split so each c
 | Package | Role |
 |---|---|
 | `@deepseek-ai/dsh-compact` (this) | the interface: abstract service + `compact/*` events + `CompactionResult` |
-| `@deepseek-ai/dsh-compact-basic` (deferred) | a backend: char/4 estimation + token-budget retention + `llm.stream()` summarization |
+| `@deepseek-ai/dsh-compact-basic` (deferred) | a backend: chars-per-token estimation (`charsPerToken`, default 4) + token-budget retention + `llm.stream()` summarization |
 | `@deepseek-ai/dsh-tool-compact` (deferred) | the model-facing `/compact` tool over `ctx.compact` |
 
 Unlike the bash seam, this interface depends on `@deepseek-ai/dsh-session` and `@deepseek-ai/dsh-llm` — the contract's verbs are defined over a `Session` and its output is the `ContentBlock` vocabulary, so they cannot be expressed without naming those packages. That deviation from the "interface depends only on cordis" guidance is intentional and recorded in the [compaction capability-seam RFC](../../../docs/rfc/implemented/feature/2026-06-18-compaction-capability-seam.md).

packages/compact/compact/src/index.ts

@@ -141,6 +141,7 @@ export abstract class CompactService extends Service {
    *   prior replace can leave the surface non-monotonic in seq order), or if
    *   either boundary is not a balanced tool-pairing cut (would split a step's
    *   tool-call/result pair).
+   * @returns what the compaction did (the replaced range and its summary node).
    */
   abstract compactRegion(
     session: Session,

packages/core/agent-loop/src/index.ts

@@ -121,6 +121,9 @@ export class AgentLoop extends Service implements AgentFactory {
    * deliberate resume-or-create policy (resume the prior session if one exists,
    * else start fresh) or an explicit caller-chosen session id — revisit when the
    * UI/ACP path owns session selection.
+   * @param id - the agent id; also seeds the generated session id.
+   * @param options - loop options (model, limits, …); defaults applied per option.
+   * @returns the running agent, owned by the calling fiber (no handle).
    */
   create(id: AgentId, options: AgentOptions = {}): ReactLoopAgent {
     this.assertAgentIdFree(id)
@@ -142,6 +145,9 @@ export class AgentLoop extends Service implements AgentFactory {
    * `seed` (a balanced completed-turn prefix of the parent's log) so the child
    * starts with the parent's context. Returns an {@link AgentHandle} the owner
    * disposes to tear down exactly this agent.
+   * @param options - agent id, caller-supplied session id, optional seed/meta,
+   *   and agent options.
+   * @returns the handle whose dispose tears down exactly this agent.
    */
   createAgent(options: CreateAgentOptions): AgentHandle {
     // Check the agent id BEFORE preparing the session: register() would reject a
@@ -168,6 +174,8 @@ export class AgentLoop extends Service implements AgentFactory {
    * configured. NOT hard-injected (that would make non-persistent demos pend
    * forever) — callers that need resume (ACP) inject `sessionPersistence`, so
    * by the time this runs the service exists.
+   * @param options - the persisted session id to reload, plus agent id/options.
+   * @returns the handle for the agent resumed on the reconstructed session.
    */
   async resume(options: ResumeAgentOptions): Promise<AgentHandle> {
     // Read the service through `ctx.get('sessionPersistence')` — a direct

packages/core/agent-loop/src/loop.ts

@@ -166,7 +166,7 @@ export interface LoopHandle {
  *                                                        → dispatch → tools/post-execute
  *         session('tool/result')
  *       append buffered post-execute additionalContext → session('context/message')(s)
- *       drain steering → session('steering/message'); emit agent/steering
+ *       drain steering → session('steering/message')
  *       session('step/end')                           ⟵ durable step boundary (no agent/* mirror)
  *       cont = waterfall agent/turn-continuation       ⟵ ContinuationDecision; default
  *         {action: hadToolCalls||steered ? 'continue':'stop'}; a continue.reason is
@@ -420,7 +420,7 @@ async function runTurn(ctx: Context, agent: ReactLoopAgent, handle: LoopHandle,
 
       // Steering from the previous round's continuation listeners joins before
       // the request.
-      drainSteering(ctx, agent, turn)
+      drainSteering(agent, turn)
 
       // The step's AbortController exists BEFORE any async pre-step work so a
       // dispose() or cancel() — in a synchronous turn-start listener or an
@@ -529,7 +529,7 @@ async function runTurn(ctx: Context, agent: ReactLoopAgent, handle: LoopHandle,
       if (stepReason) reason = stepReason
 
       // Steering that arrived during streaming/tool execution.
-      const steered = drainSteering(ctx, agent, turn)
+      const steered = drainSteering(agent, turn)
 
       if (closeStep()) break
 
@@ -635,11 +635,10 @@ async function runTurn(ctx: Context, agent: ReactLoopAgent, handle: LoopHandle,
 }
 
 /** Drain the steering queue into the session. Returns whether any arrived. */
-function drainSteering(ctx: Context, agent: ReactLoopAgent, turn: number): boolean {
+function drainSteering(agent: ReactLoopAgent, turn: number): boolean {
   const messages = agent.inbox.drainSteering()
   for (const message of messages) {
     agent.session.append('steering/message', { turn, content: message.content, source: message.source }, { surfaceOp: 'append' })
-    ctx.emit('agent/steering', agent, turn, message.content, message.source)
   }
   return messages.length > 0
 }

packages/core/agent-loop/tests/review-fixes.spec.ts

@@ -410,7 +410,7 @@ describe('MEDIUM: misc registry and config fixes', () => {
     expect(agent.session.deriveMessages().at(-1)?.content).toEqual([{ type: 'text', text: 'routed' }])
   })
 
-  it('agent/queued carries the resolved source; agent/steering carries its source', async () => {
+  it('agent/queued carries the resolved source; steering/message records its source', async () => {
     const adapter = new MockAdapter([toolCallResponse('c1', 'noop', {}), textResponse('done')])
     const ctx = await harness(adapter)
     const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' })
@@ -425,15 +425,16 @@ describe('MEDIUM: misc registry and config fixes', () => {
     }))
 
     const queuedSources: { source: MessageSource; steering: boolean }[] = []
-    const steeringSources: MessageSource[] = []
     ctx.on('agent/queued', (_agent, _content, info) => void queuedSources.push(info))
-    ctx.on('agent/steering', (_agent, _turn, _content, source) => void steeringSources.push(source))
 
     send(agent, 'go') // no explicit source → default {kind:'user'} must be visible
     await waitForIdle(ctx, agent)
 
     expect(queuedSources[0]).toEqual({ source: { kind: 'user' }, steering: false })
     expect(queuedSources[1]).toEqual({ source: { kind: 'plugin', plugin: 'goal' }, steering: true })
+    // The drain appends the durable steering/message with the caller's source
+    // intact — the log, not a transient emit, is where consumers read it.
+    const steeringSources = agent.session.events.flatMap(e => e.type === 'steering/message' ? [e.data.source] : [])
     expect(steeringSources).toEqual([{ kind: 'plugin', plugin: 'goal' }])
   })
 })

packages/core/agent/README.md

@@ -50,9 +50,8 @@ Turn and step boundaries are NOT mirrored as `agent/*` emits: a consumer that ne
 
 Tool interception is the `tools/pre-execute` / `tools/post-execute` pair in [`dsh-tools`](../tools/README.md) (`PreToolDecision` allow/deny/ask, `PostToolDecision` accept/block) — same typed-Decision idiom, owned there because it is the tool registry's seam.
 
-#### Live control notifications (emit)
+#### Error notifications (emit)
 
-- `agent/steering` — steering content injected mid-turn
 - `agent/error` — step/turn error
 
 The model's token stream is NOT an `agent/*` event: read it off the durable `session/event` feed as `assistant/chunk` (the same feed persistence and the ACP bridge use).

packages/core/agent/src/index.ts

@@ -126,6 +126,8 @@ export class AgentRegistry extends Service {
    * Register the agent-creation factory (the loop calls this on construction,
    * effect-scoped). Throws if a factory is already registered. Returns the
    * disposer; on dispose the factory slot is cleared.
+   * @param factory - the loop-owned factory {@link create}/{@link resume} delegate to.
+   * @returns the disposer that clears the factory slot.
    */
   setFactory(factory: AgentFactory): () => void {
     const dispose = this.ctx.effect(() => {
@@ -142,6 +144,8 @@ export class AgentRegistry extends Service {
    * agent): this constructs the agent and its session. Throws if no factory is
    * registered. Returns an {@link AgentHandle} — the owner disposes it to tear
    * down exactly this agent.
+   * @param options - agent id, session id/seed/metadata, and agent options.
+   * @returns the handle whose dispose tears down exactly this agent.
    */
   create(options: CreateAgentOptions): AgentHandle {
     if (this.factory === undefined) throw new Error(NO_FACTORY_MESSAGE)
@@ -152,6 +156,8 @@ export class AgentRegistry extends Service {
    * Load a persisted session and resume an agent on it through the registered
    * factory. Rejects if no factory is registered; the factory rejects if
    * session persistence is not configured. Returns an {@link AgentHandle}.
+   * @param options - the persisted session id plus agent id and options.
+   * @returns the handle for the resumed agent.
    */
   async resume(options: ResumeAgentOptions): Promise<AgentHandle> {
     if (this.factory === undefined) throw new Error(NO_FACTORY_MESSAGE)
@@ -162,6 +168,8 @@ export class AgentRegistry extends Service {
    * Register a live agent. Throws if an agent with the same id is already
    * registered. Emits `agent/created` on registration and `agent/disposed`
    * when the calling fiber is disposed. Returns the disposer.
+   * @param agent - the already-constructed agent to record in the store.
+   * @returns the disposer that removes the agent and emits `agent/disposed`.
    */
   register(agent: Agent): () => void {
     const dispose = this.ctx.effect(function* (this: AgentRegistry) {
@@ -200,10 +208,19 @@ export class AgentRegistry extends Service {
     return () => void dispose()
   }
 
+  /**
+   * Look up a live agent.
+   * @param id - the agent id to look up.
+   * @returns the agent, or undefined when no live agent has that id.
+   */
   get(id: AgentId): Agent | undefined {
     return this.store.get(id)
   }
 
+  /**
+   * All live agents, in registration order.
+   * @returns a fresh array; mutating it does not affect the registry.
+   */
   list(): Agent[] {
     return [...this.store.values()]
   }

packages/core/agent/src/types.ts

@@ -20,7 +20,7 @@
  *   `agent/request`/`agent/step-result`/`agent/turn-continuation` waterfalls and
  *   the serial `agent/pre-step`) that mutate/veto, and TRANSIENT emits
  *   (`agent/status`, `agent/error`, `agent/created`/
- *   `agent/disposed`, `agent/queued`, `agent/steering`, `agent/session-start`)
+ *   `agent/disposed`, `agent/queued`, `agent/session-start`)
  *   that notify with the `Agent` in hand. Turn/step boundaries are NOT here —
  *   they are durable `session/event` records. Answers "right now, with the agent
  *   object — intercept or observe."
@@ -228,12 +228,14 @@ declare module 'cordis' {
     /**
      * An agent was registered in the {@link AgentRegistry} and is ready to
      * receive messages.
+     * @param agent - the newly registered agent, already resolvable in the registry.
      * @mode emit
      */
     'agent/created'(agent: Agent): void
     /**
      * An agent was disposed and removed from the registry; its fiber and any
      * in-flight turn have been torn down.
+     * @param agent - the agent that was torn down; its handle is now inert.
      * @mode emit
      */
     'agent/disposed'(agent: Agent): void
@@ -241,12 +243,17 @@ declare module 'cordis' {
      * Agent status changed (`idle` ⇄ `running`, or → `disposed`). Drive
      * lifecycle off this transition, never off a status you just requested —
      * `send()` does not flip status to `running` before it returns.
+     * @param agent - the agent whose status flipped.
+     * @param status - the status just entered (the transition's destination).
      * @mode emit
      */
     'agent/status'(agent: Agent, status: AgentStatus): void
     /**
      * A message entered the agent's inbox (queued or steering). `source` is
      * the resolved source (defaults applied), not the caller's raw options.
+     * @param agent - the agent whose inbox received the message.
+     * @param content - the enqueued content blocks, verbatim.
+     * @param info - the resolved source plus whether it entered as steering.
      * @mode emit
      */
     'agent/queued'(agent: Agent, content: ContentBlock[], info: { source: MessageSource; steering: boolean }): void
@@ -260,6 +267,8 @@ declare module 'cordis' {
      * so via `agent.inject()` (a `context/message` the first request sees), not
      * by returning a decision. Cannot block the session from starting; that gap
      * is deliberate (a bridge logs/injects, it does not gate startup).
+     * @param agent - the agent whose session lifecycle began.
+     * @param source - why the session started (fresh startup, resume, …).
      * @mode emit
      */
     'agent/session-start'(agent: Agent, source: SessionStartSource): void
@@ -295,6 +304,11 @@ declare module 'cordis' {
      * listener needs to measure pressure (the system prompt counts toward the
      * budget). `signal` cancels any in-flight work a listener starts (e.g. a
      * summarization model call).
+     * @param agent - the agent about to open the step.
+     * @param turn - the already-open turn this step belongs to.
+     * @param step - the number of the step about to start.
+     * @param fullSystemPrompt - the assembled prompt, for measuring token pressure.
+     * @param signal - aborts in-flight listener work when the turn is torn down.
      * @mode serial
      */
     // TODO: `fullSystemPrompt` is a smell on a generic per-step seam — compaction
@@ -310,6 +324,9 @@ declare module 'cordis' {
      * turn, per drained message. Maps onto Claude Code's `UserPromptSubmit` hook.
      * Call `next()` to delegate to the default (allow unchanged), or return a
      * {@link PromptDecision} without calling `next()` to short-circuit.
+     * @param agent - the agent draining its inbox.
+     * @param content - the drained message's blocks, as queued.
+     * @param source - the message's resolved source.
      * @mode waterfall
      */
     'agent/prompt-submit'(agent: Agent, content: ContentBlock[], source: MessageSource, next: () => Promise<PromptDecision>): Promise<PromptDecision>
@@ -319,12 +336,20 @@ declare module 'cordis' {
      * delegate, or return without it to short-circuit. For surface mutation that
      * must precede history derivation (compaction), use {@link agent/pre-step}
      * instead — by the time this fires, `options.messages` is already derived.
+     * @param agent - the agent making the model call.
+     * @param turn - the open turn number.
+     * @param step - the step whose request this is.
+     * @param options - the assembled request; listeners return a transformed copy.
      * @mode waterfall
      */
     'agent/request'(agent: Agent, turn: number, step: number, options: GenerateOptions, next: () => Promise<GenerateOptions>): Promise<GenerateOptions>
     /**
      * Waterfall: post-process the assembled assistant {@link Message} before
      * tool dispatch (validation, content rewriting, …).
+     * @param agent - the agent that received the step's response.
+     * @param turn - the open turn number.
+     * @param step - the step that produced the message.
+     * @param message - the assistant message as assembled from the stream.
      * @mode waterfall
      */
     'agent/step-result'(agent: Agent, turn: number, step: number, message: Message, next: () => Promise<Message>): Promise<Message>
@@ -335,19 +360,21 @@ declare module 'cordis' {
      * Listeners force-continue (`/goal`, `/loop` — optionally attaching a
      * `reason` recorded as next-step steering) or force-stop (budget guards).
      * Call `next()` to delegate to the default, or return a decision to override.
+     * @param agent - the agent deciding whether to run another step.
+     * @param turn - the turn being continued or stopped.
+     * @param defaultDecision - what the loop would do absent an override.
      * @mode waterfall
      */
     'agent/turn-continuation'(agent: Agent, turn: number, defaultDecision: ContinuationDecision, next: () => Promise<ContinuationDecision>): Promise<ContinuationDecision>
 
-    // ---- streaming + tool notifications (emit) ----
-    /**
-     * Steering content was injected into a running turn.
-     * @mode emit
-     */
-    'agent/steering'(agent: Agent, turn: number, content: ContentBlock[], source: MessageSource): void
+    // ---- error notifications (emit) ----
     /**
      * A step or turn errored. The loop reports a failure here (plus the logger)
      * even when the error has no in-turn position for a session `error` event.
+     * @param agent - the agent whose turn errored.
+     * @param turn - the turn in which the failure surfaced.
+     * @param step - the step at which the failure surfaced.
+     * @param error - the failure, verbatim.
      * @mode emit
      */
     'agent/error'(agent: Agent, turn: number, step: number, error: Error): void

packages/core/agent/tests/gen-cordis-catalog.spec.ts

@@ -4,17 +4,20 @@
  * The generated catalog is frozen by a regenerate-and-diff freshness gate, so
  * the freshness half is exercised by `pnpm run verify-cordis-catalog` in CI.
  * What a freshness diff CANNOT prove is that the generator REJECTS malformed
- * source the way it promises to — a missing `@mode` tag, or a tag that
- * contradicts the signature shape. These tests drive `collectEvents()` against
- * synthetic fixture packages to prove each guard fires (and that a well-formed
- * event passes), mirroring the drift-guard negative tests for verify-type-equiv.
+ * source the way it promises to — a missing `@mode` tag, a tag that
+ * contradicts the signature shape, or a JSDoc-completeness violation (missing
+ * prose, an undocumented parameter, a stale `@param`, a missing `@returns`, an
+ * unannotated return type). These tests drive `collectEvents()` /
+ * `collectServices()` against synthetic fixture packages to prove each guard
+ * fires (and that well-formed declarations pass), mirroring the drift-guard
+ * negative tests for verify-type-equiv.
  */
 
 import { mkdtempSync, mkdirSync, rmSync, writeFileSync } from 'node:fs'
 import { tmpdir } from 'node:os'
 import { join } from 'node:path'
 import { afterEach, describe, expect, it } from 'vitest'
-import { collectEvents } from '../../../../scripts/gen-cordis-catalog.ts'
+import { collectEvents, collectServices } from '../../../../scripts/gen-cordis-catalog.ts'
 
 /** Write a fixture package exposing one `interface Events` block and return the
  * scan root to hand `collectEvents`. */
@@ -29,12 +32,31 @@ function fixtureRoot(eventsBlock: string): string {
   return root
 }
 
+/** Write a fixture package exposing one `interface Context` entry (`ctx.fix` →
+ * `FixService`) plus the class source, and return the scan root to hand
+ * `collectServices`. */
+function serviceFixtureRoot(classSource: string): string {
+  const root = mkdtempSync(join(tmpdir(), 'cordis-catalog-'))
+  const dir = join(root, 'packages', 'group', 'fix', 'src')
+  mkdirSync(dir, { recursive: true })
+  writeFileSync(
+    join(dir, 'index.ts'),
+    `declare module 'cordis' {\n  interface Context {\n    fix: FixService\n  }\n}\n\n${classSource}\n`,
+  )
+  return root
+}
+
 const roots: string[] = []
 const make = (block: string): string => {
   const r = fixtureRoot(block)
   roots.push(r)
   return r
 }
+const makeService = (classSource: string): string => {
+  const r = serviceFixtureRoot(classSource)
+  roots.push(r)
+  return r
+}
 
 afterEach(() => {
   while (roots.length) rmSync(roots.pop()!, { recursive: true, force: true })
@@ -43,7 +65,7 @@ afterEach(() => {
 describe('gen-cordis-catalog collectEvents', () => {
   it('extracts a well-formed event with its @mode and JSDoc', () => {
     const events = collectEvents(make(
-      '    /**\n     * A thing happened.\n     * @mode emit\n     */\n    \'fix/happened\'(id: string): void',
+      '    /**\n     * A thing happened.\n     * @param id - which thing.\n     * @mode emit\n     */\n    \'fix/happened\'(id: string): void',
     ))
     expect(events).toHaveLength(1)
     expect(events[0]).toMatchObject({ name: 'fix/happened', scope: 'fix', mode: 'emit', doc: 'A thing happened.' })
@@ -51,7 +73,7 @@ describe('gen-cordis-catalog collectEvents', () => {
 
   it('classifies a trailing-next signature as a waterfall', () => {
     const events = collectEvents(make(
-      '    /**\n     * Intercept it.\n     * @mode waterfall\n     */\n    \'fix/intercept\'(x: number, next: () => Promise<number>): Promise<number>',
+      '    /**\n     * Intercept it.\n     * @param x - the value under interception.\n     * @mode waterfall\n     */\n    \'fix/intercept\'(x: number, next: () => Promise<number>): Promise<number>',
     ))
     expect(events[0]?.mode).toBe('waterfall')
   })
@@ -65,19 +87,154 @@ describe('gen-cordis-catalog collectEvents', () => {
 
   it('hard-errors when an event is missing its @mode tag', () => {
     expect(() => collectEvents(make(
-      '    /** No mode here. */\n    \'fix/untagged\'(id: string): void',
+      '    /** No mode here. */\n    \'fix/untagged\'(): void',
     ))).toThrow(/missing an @mode tag/)
   })
 
   it('hard-errors when @mode contradicts a trailing-next (waterfall) shape', () => {
     expect(() => collectEvents(make(
-      '    /**\n     * Mislabeled.\n     * @mode emit\n     */\n    \'fix/wrong\'(x: number, next: () => Promise<number>): Promise<number>',
+      '    /**\n     * Mislabeled.\n     * @param x - the value.\n     * @mode emit\n     */\n    \'fix/wrong\'(x: number, next: () => Promise<number>): Promise<number>',
     ))).toThrow(/trailing 'next' parameter .* tagged '@mode emit'/)
   })
 
   it('hard-errors when @mode waterfall has no trailing next to delegate to', () => {
     expect(() => collectEvents(make(
-      '    /**\n     * Not actually a waterfall.\n     * @mode waterfall\n     */\n    \'fix/nonext\'(id: string): void',
+      '    /**\n     * Not actually a waterfall.\n     * @param id - which thing.\n     * @mode waterfall\n     */\n    \'fix/nonext\'(id: string): void',
     ))).toThrow(/tagged '@mode waterfall' but has no trailing 'next'/)
   })
+
+  it('hard-errors on an undocumented payload parameter', () => {
+    expect(() => collectEvents(make(
+      '    /**\n     * A thing happened.\n     * @mode emit\n     */\n    \'fix/happened\'(id: string): void',
+    ))).toThrow(/is missing @param id/)
+  })
+
+  it('hard-errors on a stale @param naming no real parameter', () => {
+    expect(() => collectEvents(make(
+      '    /**\n     * A thing happened.\n     * @param id - which thing.\n     * @param ghost - not a parameter.\n     * @mode emit\n     */\n    \'fix/happened\'(id: string): void',
+    ))).toThrow(/@param ghost does not match any parameter/)
+  })
+
+  it('hard-errors on an @param with an empty description', () => {
+    expect(() => collectEvents(make(
+      '    /**\n     * A thing happened.\n     * @param id\n     * @mode emit\n     */\n    \'fix/happened\'(id: string): void',
+    ))).toThrow(/@param id has an empty description/)
+  })
+
+  it('hard-errors on an event whose JSDoc has no description prose', () => {
+    expect(() => collectEvents(make(
+      '    /**\n     * @param id - which thing.\n     * @mode emit\n     */\n    \'fix/happened\'(id: string): void',
+    ))).toThrow(/no description prose/)
+  })
+
+  it('exempts the `this` receiver and the trailing waterfall `next` from @param', () => {
+    const events = collectEvents(make(
+      '    /**\n     * Scoped interception.\n     * @param x - the value under interception.\n     * @mode waterfall\n     */\n    \'fix/scoped\'(this: object, x: number, next: () => Promise<number>): Promise<number>',
+    ))
+    expect(events).toHaveLength(1)
+  })
+
+  it('hard-errors on a binding-pattern parameter @param cannot name', () => {
+    expect(() => collectEvents(make(
+      '    /**\n     * A thing happened.\n     * @mode emit\n     */\n    \'fix/destructured\'({ id }: { id: string }): void',
+    ))).toThrow(/is a binding pattern/)
+  })
+
+  it('aggregates every violation into one error instead of failing fast', () => {
+    expect(() => collectEvents(make(
+      '    /** First. */\n    \'fix/one\'(): void\n    /** Second. */\n    \'fix/two\'(): void',
+    ))).toThrow(/2 JSDoc completeness violation\(s\)[\s\S]*fix\/one[\s\S]*fix\/two/)
+  })
+})
+
+describe('gen-cordis-catalog collectServices', () => {
+  const WELL_FORMED = `/** Fixture service. */
+export class FixService {
+  /**
+   * Do the thing.
+   * @param id - which thing to do.
+   * @returns the outcome of doing it.
+   */
+  run(id: string): string { return id }
+
+  /** Fire and forget (void needs no @returns). */
+  poke(): void {}
+
+  /** Flush (Promise<void> needs no @returns either). */
+  flush(): Promise<void> { return Promise.resolve() }
+}`
+
+  it('extracts a well-formed service with its methods and class JSDoc', () => {
+    const services = collectServices(makeService(WELL_FORMED))
+    expect(services).toHaveLength(1)
+    expect(services[0]).toMatchObject({ key: 'fix', type: 'FixService', abstract: false, doc: 'Fixture service.' })
+    expect(services[0]?.methods).toHaveLength(3)
+  })
+
+  it('hard-errors on a public method with no JSDoc at all', () => {
+    expect(() => collectServices(makeService(
+      '/** Fixture service. */\nexport class FixService {\n  run(id: string): string { return id }\n}',
+    ))).toThrow(/ctx\.fix\.run .* has no JSDoc/)
+  })
+
+  it('hard-errors on an undocumented method parameter', () => {
+    expect(() => collectServices(makeService(
+      '/** Fixture service. */\nexport class FixService {\n  /**\n   * Do the thing.\n   * @returns the outcome.\n   */\n  run(id: string): string { return id }\n}',
+    ))).toThrow(/ctx\.fix\.run .* is missing @param id/)
+  })
+
+  it('hard-errors on a missing @returns for a non-void return type', () => {
+    expect(() => collectServices(makeService(
+      '/** Fixture service. */\nexport class FixService {\n  /**\n   * Do the thing.\n   * @param id - which thing.\n   */\n  run(id: string): string { return id }\n}',
+    ))).toThrow(/is missing @returns \(return type: string\)/)
+  })
+
+  it('hard-errors on an unannotated (inferred) return type', () => {
+    expect(() => collectServices(makeService(
+      '/** Fixture service. */\nexport class FixService {\n  /**\n   * Do the thing.\n   * @param id - which thing.\n   */\n  run(id: string) { return id }\n}',
+    ))).toThrow(/no return type annotation/)
+  })
+
+  it('hard-errors on a service class with no JSDoc', () => {
+    expect(() => collectServices(makeService(
+      'export class FixService {\n  /** Fire and forget. */\n  poke(): void {}\n}',
+    ))).toThrow(/class FixService has no JSDoc/)
+  })
+
+  it('hard-errors on a stale method @param', () => {
+    expect(() => collectServices(makeService(
+      '/** Fixture service. */\nexport class FixService {\n  /**\n   * Fire and forget.\n   * @param ghost - not a parameter.\n   */\n  poke(): void {}\n}',
+    ))).toThrow(/@param ghost does not match any parameter/)
+  })
+
+  it('hard-errors on a method whose JSDoc is tags with no description prose', () => {
+    expect(() => collectServices(makeService(
+      '/** Fixture service. */\nexport class FixService {\n  /**\n   * @param id - which thing.\n   * @returns the outcome.\n   */\n  run(id: string): string { return id }\n}',
+    ))).toThrow(/no description prose above its block tags/)
+  })
+
+  it('hard-errors on a method @param with an empty description', () => {
+    expect(() => collectServices(makeService(
+      '/** Fixture service. */\nexport class FixService {\n  /**\n   * Fire and forget.\n   * @param id\n   */\n  poke(id: string): void {}\n}',
+    ))).toThrow(/@param id has an empty description/)
+  })
+
+  it('hard-errors on an @returns with an empty description', () => {
+    expect(() => collectServices(makeService(
+      '/** Fixture service. */\nexport class FixService {\n  /**\n   * Do the thing.\n   * @param id - which thing.\n   * @returns\n   */\n  run(id: string): string { return id }\n}',
+    ))).toThrow(/@returns has an empty description/)
+  })
+
+  it('hard-errors on a binding-pattern method parameter @param cannot name', () => {
+    expect(() => collectServices(makeService(
+      '/** Fixture service. */\nexport class FixService {\n  /**\n   * Do the thing.\n   */\n  run({ id }: { id: string }): void {}\n}',
+    ))).toThrow(/is a binding pattern/)
+  })
+
+  it('ignores private/protected/static members (not the ctx.<key> surface)', () => {
+    const services = collectServices(makeService(
+      '/** Fixture service. */\nexport class FixService {\n  private hidden(id: string): string { return id }\n  protected hook(): void {}\n  static helper(): void {}\n}',
+    ))
+    expect(services[0]?.methods).toHaveLength(0)
+  })
 })

packages/core/session/src/index.ts

@@ -30,12 +30,15 @@ declare module 'cordis' {
   interface Events {
     /**
      * A session was created in the store.
+     * @param session - the session just entered and announced.
      * @mode emit
      */
     'session/created'(session: Session): void
     /**
      * An event was appended to a session log (sync, fire-and-forget). This is
      * the per-append feed a UI or invariant plugin tails.
+     * @param session - the session whose log grew.
+     * @param event - the appended event, exactly as recorded.
      * @mode emit
      */
     'session/event'(session: Session, event: SessionEvent): void
@@ -45,6 +48,7 @@ declare module 'cordis' {
      * plugins (JSONL, SQLite) drain their write-behind buffers here and on
      * fiber dispose. Awaited (parallel), not a waterfall: every listener runs
      * and the loop waits for all of them, but none can veto.
+     * @param session - the session whose buffered events must reach durable storage.
      * @mode parallel
      */
     'session/flush'(session: Session): Promise<void> | void
@@ -342,6 +346,9 @@ export class SessionStore extends Service {
    * {@link prepare} + {@link enter} + {@link announce} (see `dsh-agent-loop`'s
    * `startOwned`).
    *
+   * @param id - the session id; omitted, the store mints `session-<n>`.
+   * @param options - seed events and/or creation metadata for the header.
+   * @returns the live session, already entered and announced.
    * @throws if a session with `id` already exists, or if `meta.cwd` is a
    *   non-absolute path (storage backends key directories off it).
    */
@@ -367,6 +374,9 @@ export class SessionStore extends Service {
    * chain rather than as racing sibling effects — which would detach `onAppend`
    * before the loop's closing `session/flush`, dropping the closing events.
    *
+   * @param id - the session id; omitted, the store mints `session-<n>`.
+   * @param options - seed events and/or creation metadata for the header.
+   * @returns the constructed session, NOT yet in the store.
    * @throws if a session with `id` already exists, or if `meta.cwd` is a
    *   non-absolute path.
    */
@@ -404,6 +414,8 @@ export class SessionStore extends Service {
    * the two back-to-back so they never trip this, but the public seam cannot
    * assume that.
    *
+   * @param session - a {@link prepare}d session not yet in the store.
+   * @returns the detach disposer (`onAppend = undefined` + store removal).
    * @throws if a session with this id is already in the store.
    */
   enter(session: Session): () => void {
@@ -418,15 +430,25 @@ export class SessionStore extends Service {
 
   /** Emit `session/created` for an {@link enter}ed session. Separate from
    * {@link enter} so the caller can yield the detach disposer first (rollback
-   * safety — see {@link enter}). */
+   * safety — see {@link enter}).
+   * @param session - the entered session to announce to listeners. */
   announce(session: Session): void {
     this.ctx.emit('session/created', session)
   }
 
+  /**
+   * Look up a live session.
+   * @param id - the session id to look up.
+   * @returns the session, or undefined when no live session has that id.
+   */
   get(id: SessionId): Session | undefined {
     return this.store.get(id)
   }
 
+  /**
+   * All live sessions, in creation order.
+   * @returns a fresh array; mutating it does not affect the store.
+   */
   list(): Session[] {
     return [...this.store.values()]
   }

packages/core/session/src/types.ts

@@ -91,7 +91,6 @@ export interface CreateSessionOptions {
  */
 export interface TurnTriggerMap {
   message: { kind: 'message'; source: MessageSource }
-  continuation: { kind: 'continuation' }
   /**
    * An out-of-band context injection (`agent.inject()`) made while the agent
    * was idle. The loop wraps the injected `context/message` in a one-shot turn

packages/core/system-prompt/src/index.ts

@@ -19,6 +19,8 @@ declare module 'cordis' {
      * Waterfall around prompt assembly — mutate or extend the
      * {@link PromptAssembly} (sections + tool schemas) before it is rendered.
      * Bound to the {@link SystemPrompt} service; call `next()` to delegate.
+     * @param assembly - the assembly built from the registered sections and
+     *   tool providers; listeners may mutate it or return a replacement.
      * @mode waterfall
      */
     'system-prompt/assemble'(this: SystemPrompt, assembly: PromptAssembly, next: () => Promise<PromptAssembly>): Promise<PromptAssembly>
@@ -80,6 +82,8 @@ export class SystemPrompt extends Service {
    * Contribute a text section to the system prompt. Order is determined by
    * `section.order` (ascending). The section is removed when the calling
    * fiber is disposed. Emits `system-prompt/change` on register/unregister.
+   * @param section - the section to contribute (name, order, text or provider).
+   * @returns the disposer that removes the section.
    */
   section(section: PromptSection): () => void {
     const dispose = this.ctx.effect(function* (this: SystemPrompt) {
@@ -105,6 +109,8 @@ export class SystemPrompt extends Service {
    * Contribute a tool-schema provider that is evaluated at each assembly
    * call (so it can reflect the live registry state). The provider is
    * removed when the calling fiber is disposed. Emits `system-prompt/change`.
+   * @param provider - evaluated at every {@link assemble} for fresh schemas.
+   * @returns the disposer that removes the provider.
    */
   tools(provider: () => ToolSchema[]): () => void {
     const dispose = this.ctx.effect(function* (this: SystemPrompt) {
@@ -132,6 +138,7 @@ export class SystemPrompt extends Service {
    * listeners the opportunity to mutate or replace the assembly before it
    * reaches the model. Await the result before reading the assembly values —
    * waterfall listeners may be async.
+   * @returns the assembly after the waterfall has run.
    */
   assemble(): Promise<PromptAssembly> {
     const assembly: PromptAssembly = {

packages/core/tools/src/index.ts

@@ -60,6 +60,7 @@ declare module 'cordis' {
      * tool body never runs. Input rewrite is deliberately NOT offered here (see
      * {@link PreToolDecision}); `ask` degrades to deny until the permission
      * system lands (`FIXME(permissions)`).
+     * @param exec - the pending call (name, parsed arguments, caller agent).
      * @mode waterfall
      */
     'tools/pre-execute'(this: ToolRegistry, exec: ToolExecution, next: () => Promise<PreToolDecision>): Promise<PreToolDecision>
@@ -74,6 +75,8 @@ declare module 'cordis' {
      * `execute`'s outer try/catch (and the tool body keeps its own inner
      * try/catch, so a thrown tool still reaches `post-execute` as an `isError`
      * result).
+     * @param exec - the call that just ran (name, parsed arguments, caller agent).
+     * @param result - the dispatch outcome a listener may accept, replace, or block.
      * @mode waterfall
      */
     'tools/post-execute'(this: ToolRegistry, exec: ToolExecution, result: ToolExecutionResult, next: () => Promise<PostToolDecision>): Promise<PostToolDecision>
@@ -277,6 +280,9 @@ export class ToolRegistry extends Service {
    * registered. The tool's schema (minus the `execute` function) is
    * automatically contributed to the system-prompt assembly. Disposed
    * with the calling fiber. Emits `tools/change` on register/unregister.
+   * @param definition - the tool's schema plus its execute (and optional
+   *   presentation) functions.
+   * @returns the disposer that unregisters the tool.
    */
   register(definition: ToolDefinition): () => void {
     const dispose = this.ctx.effect(function* (this: ToolRegistry) {
@@ -300,26 +306,31 @@ export class ToolRegistry extends Service {
     return () => void dispose()
   }
 
+  /**
+   * Look up a registered tool.
+   * @param name - the tool name as registered.
+   * @returns the definition, or undefined when no tool has that name.
+   */
   get(name: string): ToolDefinition | undefined {
     return this.store.get(name)
   }
 
   /**
    * Return all registered tool schemas — exactly the model-facing fields
-   * (`name`, `description`, `parameters`, and `strict` when set), as sent to the
-   * model via the system-prompt assembly. Constructed EXPLICITLY rather than by
-   * stripping known non-schema members: a `ToolDefinition` also carries
-   * `execute` and the optional `presentCall`/`presentResult` UI callbacks, and
-   * those (especially the functions) must never leak into a model request. An
-   * allowlist can't drift when a new non-schema member is added to the
-   * definition; a denylist (rest-destructure) would silently leak it.
+   * (`name`, `description`, `parameters`), as sent to the model via the
+   * system-prompt assembly. Constructed EXPLICITLY rather than by stripping
+   * known non-schema members: a `ToolDefinition` also carries `execute` and the
+   * optional `presentCall`/`presentResult` UI callbacks, and those (especially
+   * the functions) must never leak into a model request. An allowlist can't
+   * drift when a new non-schema member is added to the definition; a denylist
+   * (rest-destructure) would silently leak it.
+   * @returns one deep-cloned schema per registered tool, in registration order.
    */
   schemas(): ToolSchema[] {
-    return [...this.store.values()].map(({ name, description, parameters, strict }): ToolSchema => ({
+    return [...this.store.values()].map(({ name, description, parameters }): ToolSchema => ({
       name,
       description,
       parameters: structuredClone(parameters),
-      ...strict !== undefined ? { strict } : {},
     }))
   }
 
@@ -334,6 +345,9 @@ export class ToolRegistry extends Service {
    * still inspect. If the tool is not registered, the result is an `isError`
    * carrying a `UNKNOWN_TOOL` structured error. A thrown {@link HarnessError}
    * surfaces its `{ name, code }` on the result.
+   * @param exec - the call to run (name, parsed arguments, caller agent, signal).
+   * @returns the final result after both waterfalls; failures resolve as
+   *   `isError` results, never rejections.
    */
   async execute(exec: ToolExecution): Promise<ToolExecutionResult> {
     try {

packages/core/tools/src/schema.ts

@@ -312,8 +312,6 @@ export interface DefineToolOptions<S extends SchemaSpec> {
    * free for the same replay reason. See {@link ToolResultView}.
    */
   presentResult?(args: InferArgs<S>, result: ToolResult): ToolResultView | undefined
-  /** Whether the tool requires structured output (default false). */
-  strict?: boolean
 }
 
 /**
@@ -355,7 +353,6 @@ export function defineTool<S extends SchemaSpec>(options: DefineToolOptions<S>):
     name: options.name,
     description: options.description,
     parameters: schemaSpecToJsonSchema(options.parameters) as unknown as Record<string, unknown>,
-    ...options.strict !== undefined ? { strict: options.strict } : {},
     async execute(args: unknown, exec: ToolExecution): Promise<ToolExecuteReturn> {
       // Validate the model-generated args before the typed body runs. On
       // mismatch we throw ToolArgsError; the registry turns it into an

packages/core/tools/tests/gen-tool-catalog.spec.ts

@@ -103,15 +103,4 @@ describe('gen-tool-catalog render', () => {
     expect(md).toContain('```json')
     expect(md).toContain('Source: [`packages/demo/tool-demo/src/index.ts`]')
   })
-
-  it('renders the strict flag when a schema sets it', () => {
-    const catalog: ToolCatalog = [
-      {
-        pkg: '@deepseek-ai/dsh-tool-demo',
-        source: 'packages/demo/tool-demo/src/index.ts',
-        schemas: [{ name: 'demo', description: '', parameters: { type: 'object', properties: {} }, strict: true }],
-      },
-    ]
-    expect(render(catalog)).toContain('Strict: `true`')
-  })
 })

packages/core/tools/tests/tools.spec.ts

@@ -62,18 +62,6 @@ describe('ToolRegistry', () => {
     expect(schema.execute).toBeUndefined()
   })
 
-  it('schemas() preserves `strict` when set (allowlist keeps the model-facing fields)', async () => {
-    const ctx = await setup()
-    ctx.tools.register(defineTool({
-      name: 'strict-tool',
-      description: 'd',
-      parameters: { x: { type: 'string', required: true } },
-      strict: true,
-      async execute() { return [] },
-    }))
-    expect(ctx.tools.schemas()[0]).toMatchObject({ name: 'strict-tool', strict: true })
-  })
-
   it('executes a tool and returns its content', async () => {
     const ctx = await setup()
     ctx.tools.register(echoTool)
@@ -611,44 +599,6 @@ describe('schema DSL edge cases', () => {
     })
   })
 
-  it('defineTool passes through strict flag when set to true', () => {
-    const tool = defineTool({
-      name: 'strict-tool',
-      description: 'A strict tool',
-      parameters: { input: { type: 'string' } },
-      strict: true,
-      async execute(args) {
-        return [{ type: 'text' as const, text: args.input ?? '' }]
-      },
-    })
-    expect(tool.strict).toBe(true)
-  })
-
-  it('defineTool omits strict when not provided', () => {
-    const tool = defineTool({
-      name: 'non-strict-tool',
-      description: 'A non-strict tool',
-      parameters: { input: { type: 'string' } },
-      async execute(args) {
-        return [{ type: 'text' as const, text: args.input ?? '' }]
-      },
-    })
-    expect('strict' in tool).toBe(false)
-  })
-
-  it('defineTool strict=false is included', () => {
-    const tool = defineTool({
-      name: 'explicitly-non-strict',
-      description: 'Explicitly non-strict',
-      parameters: { input: { type: 'string' } },
-      strict: false,
-      async execute(args) {
-        return [{ type: 'text' as const, text: args.input ?? '' }]
-      },
-    })
-    expect(tool.strict).toBe(false)
-  })
-
   it('handles enum and default together in one property', () => {
     const spec = {
       level: { type: 'string', enum: ['low', 'high'], default: 'low' },

packages/fs/fs-local/src/fsio.ts

@@ -26,9 +26,6 @@ import { basename, dirname, join, resolve } from 'node:path'
 import { TextDecoder } from 'node:util'
 import { FsError, FsTargetKey, FsVersion } from '@deepseek-ai/dsh-fs'
 
-/** Files at or above this size stream their text; smaller files read whole. */
-export const STREAM_MIN_SIZE = 10 * 1024 * 1024
-
 const BINARY_SAMPLE_BYTES = 8192
 
 function isENOENT(error: unknown): boolean {
@@ -85,13 +82,11 @@ function versionOf(info: Stats): FsVersion {
 }
 
 /**
- * Test seam: lets specs force the streaming read path (via a small
- * `streamMinSize`) and pin the temp-file name (to prove exclusive-open
- * behavior) without a 10 MB fixture or a name race.
+ * Test seam: lets specs pin the atomic-write temp names (to prove
+ * exclusive-open behavior without a name race) and observe the staged temp
+ * file before it is renamed over the target.
  */
 export interface FsIoInternals {
-  /** Override {@link STREAM_MIN_SIZE} for read routing. */
-  streamMinSize?: number
   /** Override the generated private staging-dir name (relative to the target dir). */
   tempDirName?: (writePath: string) => string
   /** Override the generated temp-file name (relative to the private staging dir). */

packages/fs/fs-local/src/index.ts

@@ -41,7 +41,6 @@ import {
 import type { FsIoInternals } from './fsio.ts'
 
 export {
-  STREAM_MIN_SIZE,
   applyLiteralEdit,
   listDirectory,
   probe,
@@ -105,7 +104,7 @@ export class LocalFileSystem extends FileSystem {
 
   override async resolve(path: string, opts?: { cwd?: string }): Promise<FsTarget> {
     const local = await resolveLocalTarget(opts?.cwd ?? this.config.cwd, path)
-    return { inputPath: path, targetKey: local.targetKey, displayPath: local.displayPath }
+    return { targetKey: local.targetKey, displayPath: local.displayPath }
   }
 
   override async stat(target: FsTarget, signal?: AbortSignal): Promise<FsInfo | undefined> {
@@ -128,7 +127,7 @@ export class LocalFileSystem extends FileSystem {
     return entries.map(entry => ({
       name: entry.name,
       type: entry.type,
-      target: { inputPath: entry.name, targetKey: entry.target.targetKey, displayPath: entry.target.displayPath },
+      target: { targetKey: entry.target.targetKey, displayPath: entry.target.displayPath },
       ...(entry.version !== undefined ? { version: entry.version } : {}),
       ...(entry.size !== undefined ? { size: entry.size } : {}),
     }))
@@ -211,8 +210,6 @@ export class LocalFileSystem extends FileSystem {
 
       const after = await probe(target.targetKey)
       return {
-        replacements: edited.replacements,
-        replaceAll: edit.replaceAll,
         version: this.versionAfterWrite(after, target),
         // The LF-normalized before/after text (the applied-hunk diff basis);
         // line-ending restoration is a storage detail the diff ignores.

packages/fs/fs-local/tests/filesystem.spec.ts

@@ -138,12 +138,6 @@ describe('listDir', () => {
       join(dir, 'skills', 'dir-skill'),
       join(dir, 'skills', 'zeta.md'),
     ])
-    expect(entries.map(entry => entry.target.inputPath)).toEqual([
-      'alpha.md',
-      'broken-link',
-      'dir-skill',
-      'zeta.md',
-    ])
     const materializedEntries = entries.filter(entry => entry.version !== undefined)
     expect(materializedEntries.map(entry => entry.target.targetKey))
       .toEqual(await Promise.all(materializedEntries.map(entry => realpath(entry.target.displayPath))))
@@ -335,7 +329,7 @@ describe('editText', () => {
     await writeFile(join(dir, 'a.txt'), 'hello world')
     const target = await fs.resolve('a.txt')
     const outcome = await fs.editText(target, { oldString: 'world', newString: 'there', replaceAll: false }, { version: await versionOf(target) })
-    expect(outcome.replacements).toBe(1)
+    expect(outcome.after).toBe('hello there')
     expect(await readFile(join(dir, 'a.txt'), 'utf8')).toBe('hello there')
   })
 
@@ -365,7 +359,7 @@ describe('editText', () => {
     const target = await fs.resolve('a.txt')
     // No version guard: any current content is edited, regardless of version.
     const outcome = await fs.editText(target, { oldString: 'world', newString: 'there', replaceAll: false })
-    expect(outcome.replacements).toBe(1)
+    expect(outcome.after).toBe('hello there')
     expect(await readFile(join(dir, 'a.txt'), 'utf8')).toBe('hello there')
   })
 
@@ -411,7 +405,7 @@ describe('editText', () => {
     await writeFile(join(dir, 'a.txt'), 'a a a')
     const target = await fs.resolve('a.txt')
     const outcome = await fs.editText(target, { oldString: 'a', newString: 'b', replaceAll: true }, { version: await versionOf(target) })
-    expect(outcome.replacements).toBe(3)
+    expect(outcome.after).toBe('b b b')
     expect(await readFile(join(dir, 'a.txt'), 'utf8')).toBe('b b b')
   })
 
@@ -457,7 +451,7 @@ describe('editText', () => {
     // The version the first edit returned is a valid guard for a second edit —
     // no intervening re-stat needed.
     const second = await fs.editText(target, { oldString: 'two', newString: 'TWO', replaceAll: false }, { version: first.version })
-    expect(second.replacements).toBe(1)
+    expect(second.after).toBe('ONE TWO')
     expect(await readFile(join(dir, 'a.txt'), 'utf8')).toBe('ONE TWO')
   })
 

packages/fs/fs-policy/tests/policy.spec.ts

@@ -18,7 +18,7 @@ import * as FsPolicy from '@deepseek-ai/dsh-fs-policy'
 import type { FsPolicyExec } from '@deepseek-ai/dsh-fs-policy'
 
 function target(path: string): FsTarget {
-  return { inputPath: path, targetKey: FsTargetKey(path), displayPath: path }
+  return { targetKey: FsTargetKey(path), displayPath: path }
 }
 const ownerExec = (session: object): FsPolicyExec => ({ agent: { session } })
 

packages/fs/fs/README.md

@@ -19,7 +19,7 @@ A backend subclasses `FileSystem` and implements seven primitives.
 
 | Member | Semantics |
 |---|---|
-| `resolve(path, opts?)` | Resolve a path into a stable `FsTarget` (`inputPath`, opaque `targetKey`, `displayPath`). `opts.cwd` is the base a relative `path` resolves against (a caller supplies its session workspace; absolute paths ignore it; omitted ⇒ the backend default). Async — a remote backend may need I/O. The same file via different paths must yield the same `targetKey`. |
+| `resolve(path, opts?)` | Resolve a path into a stable `FsTarget` (opaque `targetKey`, `displayPath`). `opts.cwd` is the base a relative `path` resolves against (a caller supplies its session workspace; absolute paths ignore it; omitted ⇒ the backend default). Async — a remote backend may need I/O. The same file via different paths must yield the same `targetKey`. |
 | `stat(target, signal?)` | Return `FsInfo` metadata (`version`, `type`, optional `size`), or `undefined` when the target is absent. Never content. |
 | `readText(target, signal?)` | Read the whole regular text file as one decoded string. Owns regular-file checks, UTF-8 decoding, binary/NUL rejection (`FS_NOT_TEXT`). |
 | `streamText(target, signal?)` | Stream the same text as decoded chunks for large files (cross-chunk UTF-8 decoding stays here). |

packages/fs/fs/src/index.ts

@@ -102,6 +102,8 @@ declare module 'cordis' {
      * chain. The slot is first-wins: the first non-`next()` decider (registration
      * order, or `prepend`) occupies it; a second decider is a misconfiguration,
      * not layering. `actor` is the opaque tool-execution context, never read here.
+     * @param target - the resolved target about to be written.
+     * @param actor - the opaque tool-execution context the decider keys off.
      * @mode waterfall
      */
     'fs/write-intent'(target: FsTarget, actor: object | undefined, next: () => FsWriteIntent | undefined | Promise<FsWriteIntent | undefined>): Promise<FsWriteIntent | undefined>
@@ -114,6 +116,8 @@ declare module 'cordis' {
      * `{ version: vObserved }`, or throws `FS_NOT_OBSERVED` if the actor is unset
      * or has not observed the target. Does NOT call `next()`: one decision,
      * first-wins (see {@link Events.'fs/write-intent'}).
+     * @param target - the resolved target about to be edited.
+     * @param actor - the opaque tool-execution context the decider keys off.
      * @mode waterfall
      */
     'fs/edit-intent'(target: FsTarget, actor: object | undefined, next: () => { version: FsVersion } | undefined | Promise<{ version: FsVersion } | undefined>): Promise<{ version: FsVersion } | undefined>
@@ -126,6 +130,9 @@ declare module 'cordis' {
      * await listener promises — async or fallible audit/telemetry does not
      * belong here. No listener ⇒ nothing recorded. `actor` is the opaque
      * tool-execution context.
+     * @param target - the target that was read/written/edited.
+     * @param version - the version the actor now holds as its observation.
+     * @param actor - the observing tool-execution context; undefined records nothing useful.
      * @mode emit
      */
     'fs/observed'(target: FsTarget, version: FsVersion, actor: object | undefined): void
@@ -180,13 +187,26 @@ export abstract class FileSystem extends Service {
    * caller's per-session workspace (`exec.agent.session.header.cwd`) without the
    * provider depending on `dsh-agent`/`dsh-session`. Mirrors how `dsh-tool-bash`
    * defaults a bash `workdir` to the session cwd.
+   * @param path - the path to resolve; relative paths resolve against `opts.cwd`.
+   * @param opts - `cwd` overrides the backend's default base for relative paths.
+   * @returns the stable target; the same file yields the same `targetKey`.
    */
   abstract resolve(path: string, opts?: { cwd?: string }): Promise<FsTarget>
 
-  /** Return target metadata, or `undefined` when the target does not exist. */
+  /**
+   * Return target metadata, or `undefined` when the target does not exist.
+   * @param target - the resolved target to stat.
+   * @param signal - aborts the metadata round-trip.
+   * @returns metadata only, never content; undefined for an absent target.
+   */
   abstract stat(target: FsTarget, signal?: AbortSignal): Promise<FsInfo | undefined>
 
-  /** Read the whole regular text file as a single decoded string. */
+  /**
+   * Read the whole regular text file as a single decoded string.
+   * @param target - the resolved target to read.
+   * @param signal - aborts the read.
+   * @returns the full decoded UTF-8 content.
+   */
   abstract readText(target: FsTarget, signal?: AbortSignal): Promise<string>
 
   /**
@@ -194,12 +214,18 @@ export abstract class FileSystem extends Service {
    * semantics as {@link readText}, for large files). The backend owns
    * cross-chunk UTF-8 decoding and binary rejection so the policy layer never
    * touches raw bytes.
+   * @param target - the resolved target to read.
+   * @param signal - aborts the stream, including between chunks.
+   * @returns the chunk iterable, decoded and validated like {@link readText}.
    */
   abstract streamText(target: FsTarget, signal?: AbortSignal): Promise<AsyncIterable<string>>
 
   /**
    * List direct children of a directory in stable name order. Returns resolved
    * child targets plus cheap metadata only; never reads file contents.
+   * @param target - the resolved directory target.
+   * @param signal - aborts the listing.
+   * @returns one entry per direct child, in stable name order.
    */
   abstract listDir(target: FsTarget, signal?: AbortSignal): Promise<FsDirEntry[]>
 
@@ -208,6 +234,11 @@ export abstract class FileSystem extends Service {
    * create-vs-replace decision and stale guard when supplied; OMITTING it is an
    * unconditional create-or-overwrite (the bare provider — no version guard, no
    * read-first requirement). Atomic either way.
+   * @param target - the resolved target to write.
+   * @param content - the full new file content.
+   * @param expected - the write intent guarding the write; omit for unconditional.
+   * @param signal - aborts before the atomic rename takes effect.
+   * @returns the outcome, including the version the write produced.
    */
   abstract writeText(target: FsTarget, content: string, expected?: FsWriteIntent, signal?: AbortSignal): Promise<FsWriteOutcome>
 
@@ -217,6 +248,11 @@ export abstract class FileSystem extends Service {
    * matching; OMITTING it edits the current content unconditionally (no version
    * guard). Either way applies the replacement and writes atomically — one
    * mutation critical section — and a missing target reports `FS_STALE_VERSION`.
+   * @param target - the resolved target to edit.
+   * @param edit - the literal search/replace request.
+   * @param expected - the version guard; omit for an unconditional edit.
+   * @param signal - aborts before the atomic rename takes effect.
+   * @returns the outcome, including the version the edit produced.
    */
   abstract editText(target: FsTarget, edit: FsEditRequest, expected?: { version: FsVersion }, signal?: AbortSignal): Promise<FsEditOutcome>
 }

packages/fs/fs/src/types.ts

@@ -52,8 +52,6 @@ export function FsVersion(v: string): FsVersion {
  * this; every other operation takes it.
  */
 export interface FsTarget {
-  /** The original model/plugin-supplied path, for diagnostics only. */
-  inputPath: string
   /** Opaque key for stale guards and target lookup. */
   targetKey: FsTargetKey
   /**
@@ -142,10 +140,6 @@ export interface FsEditRequest {
 
 /** Outcome of a literal edit. */
 export interface FsEditOutcome {
-  /** Number of literal replacements applied. */
-  replacements: number
-  /** Whether every match was replaced. */
-  replaceAll: boolean
   /** Opaque version of the file after the edit. */
   version: FsVersion
   /**

packages/fs/fs/tests/service.spec.ts

@@ -23,7 +23,7 @@ class FakeFileSystem extends FileSystem {
   files = new Map<string, string>()
 
   override async resolve(path: string): Promise<FsTarget> {
-    return { inputPath: path, targetKey: FsTargetKey(path), displayPath: path }
+    return { targetKey: FsTargetKey(path), displayPath: path }
   }
   override async stat(target: FsTarget): Promise<FsInfo | undefined> {
     const content = this.files.get(target.targetKey)
@@ -45,7 +45,7 @@ class FakeFileSystem extends FileSystem {
       {
         name: 'alpha.md',
         type: 'file',
-        target: { inputPath: 'skills/alpha.md', targetKey: FsTargetKey('skills/alpha.md'), displayPath: 'skills/alpha.md' },
+        target: { targetKey: FsTargetKey('skills/alpha.md'), displayPath: 'skills/alpha.md' },
         size: 2,
         version: FsVersion('v1'),
       },
@@ -60,7 +60,7 @@ class FakeFileSystem extends FileSystem {
     const content = this.files.get(target.targetKey) ?? ''
     const after = content.split(edit.oldString).join(edit.newString)
     this.files.set(target.targetKey, after)
-    return { replacements: 1, replaceAll: edit.replaceAll, version: FsVersion('v3'), before: content, after }
+    return { version: FsVersion('v3'), before: content, after }
   }
 }
 
@@ -108,7 +108,7 @@ describe('FileSystem provider seam', () => {
     expect(entries).toEqual([{
       name: 'alpha.md',
       type: 'file',
-      target: { inputPath: 'skills/alpha.md', targetKey: 'skills/alpha.md', displayPath: 'skills/alpha.md' },
+      target: { targetKey: 'skills/alpha.md', displayPath: 'skills/alpha.md' },
       size: 2,
       version: 'v1',
     }])

packages/fs/tool-fs/README.md

@@ -11,11 +11,22 @@ await ctx.plugin(ToolFs)                                  // this package — re
 
 `@deepseek-ai/dsh-fs-policy` is **optional**: omit it and the tools run against the bare provider (unconditional write/overwrite/edit, no observed-state). A deployment that loads these tools is expected to also load it, so the behavior is read-before-write/edit.
 
+## Config
+
+All keys are optional; the defaults are the shipped read caps.
+
+| Key | Default | Meaning |
+|---|---|---|
+| `readLimit` | `2000` | Default and maximum lines returned by one `read` call (the tool schema advertises it as the `limit` default). |
+| `readMaxLineLength` | `2000` | Characters kept per line before truncation (the suffix names the cap). |
+| `readMaxBytes` | `51200` | Byte cap on one `read` call's selected lines; overflow ends the window with a "capped" footer. |
+| `readStreamMinSize` | `10485760` | Files at or above this size (or with unknown size) stream instead of loading whole into memory. |
+
 ## Tools (schemas per [the filesystem tool schemas RFC](../../../docs/rfc/implemented/feature/2026-06-17-filesystem-tool-schemas.md))
 
 | Tool | Arguments | Behavior |
 |---|---|---|
-| `read` | `file_path`, `offset?`, `limit?` | Line-numbered UTF-8 content with a pagination footer. `offset` is 1-based; `limit` defaults to and caps at 2000 lines. |
+| `read` | `file_path`, `offset?`, `limit?` | Line-numbered UTF-8 content with a pagination footer. `offset` is 1-based; `limit` defaults to and caps at the configured `readLimit` (2000). |
 | `write` | `file_path`, `content` | Create or fully replace a file. With the policy plugin: overwriting an existing file requires a prior `read` at the unchanged version; creating a new file does not. Without it: unconditional. |
 | `edit` | `file_path`, non-empty `old_string`, `new_string`, `replace_all?` | Literal replacement; unique match required unless `replace_all` is true. With the policy plugin: requires a prior `read` (any window) and the file unchanged since. Without it: unconditional. |
 

packages/fs/tool-fs/package.json

@@ -22,7 +22,8 @@
   ],
   "license": "BSD-3-Clause",
   "dependencies": {
-    "diff": "^9.0.0"
+    "diff": "^9.0.0",
+    "schemastery": "^3.18.0"
   },
   "peerDependencies": {
     "@deepseek-ai/dsh-fs": "^0.0.1",

packages/fs/tool-fs/src/edit.ts

@@ -16,7 +16,6 @@ import type { Context } from 'cordis'
 import { defineTool } from '@deepseek-ai/dsh-tools'
 import type { DiffCallView, DiffResultView, ToolResult } from '@deepseek-ai/dsh-tools'
 import type { ContentBlock } from '@deepseek-ai/dsh-llm'
-import type { FsEditOutcome } from '@deepseek-ai/dsh-fs'
 import type {} from '@deepseek-ai/dsh-fs'
 import type {} from '@deepseek-ai/dsh-system-prompt'
 import { computeHunkDiffs, diffsFromMeta, type FsDiffMeta } from './diff.ts'
@@ -43,9 +42,9 @@ export function parseEditArgs(args: { file_path: string; old_string: string; new
   }
 }
 
-/** Format an edit outcome as a Claude-style model-facing success message. */
-export function formatEditOutput(displayPath: string, outcome: FsEditOutcome): string {
-  return outcome.replaceAll
+/** Format an edit success (single-match or replace-all) as a Claude-style model-facing message. */
+export function formatEditOutput(displayPath: string, replaceAll: boolean): string {
+  return replaceAll
     ? `The file ${displayPath} has been updated. All occurrences were successfully replaced.`
     : `The file ${displayPath} has been updated successfully.`
 }
@@ -91,7 +90,7 @@ export function applyEditTool(ctx: Context): void {
       // relativizes it).
       const diffs = computeHunkDiffs(input.filePath, outcome.before, outcome.after)
       return {
-        content: [{ type: 'text', text: formatEditOutput(target.displayPath, outcome) }],
+        content: [{ type: 'text', text: formatEditOutput(target.displayPath, input.replaceAll) }],
         meta: { diffs },
       }
     },

packages/fs/tool-fs/src/index.ts

@@ -23,11 +23,14 @@
  */
 
 import type { Context } from 'cordis'
-import { applyReadTool } from './read.ts'
+import z from 'schemastery'
+import { applyReadTool, READ_LIMIT, STREAM_MIN_SIZE } from './read.ts'
 import { applyWriteTool } from './write.ts'
 import { applyEditTool } from './edit.ts'
+import { READ_MAX_BYTES, READ_MAX_LINE_LENGTH } from './read-render.ts'
 
 export { READ_LIMIT, STREAM_MIN_SIZE, applyReadTool, parseReadArgs } from './read.ts'
+export type { ReadToolCaps } from './read.ts'
 export { applyWriteTool, formatWriteOutput, parseWriteArgs } from './write.ts'
 export { applyEditTool, formatEditOutput, parseEditArgs } from './edit.ts'
 export { READ_MAX_BYTES, READ_MAX_LINE_LENGTH, buildWindow, formatReadOutput } from './read-render.ts'
@@ -41,9 +44,49 @@ export const name = 'tool-fs'
 /** Services required by the filesystem tool suite. */
 export const inject = ['tools', 'fs', 'systemPrompt']
 
+/** Plugin config (all optional — `Config` supplies the defaults). */
+export interface Config {
+  /** Default and maximum number of lines returned by one `read` call. */
+  readLimit?: number
+  /** Maximum characters returned for a single line before truncation. */
+  readMaxLineLength?: number
+  /** Maximum bytes returned for the selected lines of one `read` call. */
+  readMaxBytes?: number
+  /** Files at or above this size stream instead of loading whole into memory. */
+  readStreamMinSize?: number
+}
+
+export const Config: z<Config> = z.object({
+  readLimit: z.number().default(READ_LIMIT),
+  readMaxLineLength: z.number().default(READ_MAX_LINE_LENGTH),
+  readMaxBytes: z.number().default(READ_MAX_BYTES),
+  readStreamMinSize: z.number().default(STREAM_MIN_SIZE),
+})
+
+/** The shape after schemastery applied the defaults. */
+type ResolvedConfig = Required<Config>
+
+/** Every read cap counts lines/chars/bytes — a positive integer, or windowing arithmetic misbehaves silently. */
+function assertPositiveInteger(name: string, value: number): void {
+  if (!Number.isInteger(value) || value < 1) {
+    throw new Error(`tool-fs: ${name} must be a positive integer`)
+  }
+}
+
 /** Register the full `read`/`write`/`edit` filesystem tool suite. */
-export function apply(ctx: Context): void {
-  applyReadTool(ctx)
+export function apply(ctx: Context, config: Config): void {
+  // schemastery (Config) has already filled every defaulted field.
+  const resolved = config as ResolvedConfig
+  assertPositiveInteger('readLimit', resolved.readLimit)
+  assertPositiveInteger('readMaxLineLength', resolved.readMaxLineLength)
+  assertPositiveInteger('readMaxBytes', resolved.readMaxBytes)
+  assertPositiveInteger('readStreamMinSize', resolved.readStreamMinSize)
+  applyReadTool(ctx, {
+    limit: resolved.readLimit,
+    maxLineLength: resolved.readMaxLineLength,
+    maxBytes: resolved.readMaxBytes,
+    streamMinSize: resolved.readStreamMinSize,
+  })
   applyWriteTool(ctx)
   applyEditTool(ctx)
 }

packages/fs/tool-fs/src/read-render.ts

@@ -17,23 +17,23 @@
  */
 
 import { FsError } from '@deepseek-ai/dsh-fs'
-import type { FsVersion } from '@deepseek-ai/dsh-fs'
 
-/** Maximum characters returned for a single line. */
+/** Default maximum characters returned for a single line (the `readMaxLineLength` config). */
 export const READ_MAX_LINE_LENGTH = 2000
 
-/** Maximum bytes returned for selected file lines. */
+/** Default maximum bytes returned for selected file lines (the `readMaxBytes` config). */
 export const READ_MAX_BYTES = 50 * 1024
 
-const READ_MAX_LINE_SUFFIX = `... (line truncated to ${READ_MAX_LINE_LENGTH} chars)`
-const LINE_BUFFER_CAP = READ_MAX_LINE_LENGTH + 1
-
 /** Resolved read window. The consumer applies its defaults/caps before calling. */
 export interface ReadWindow {
   /** 1-based first line to return. */
   offset: number
   /** Maximum number of lines to return. */
   limit: number
+  /** Maximum characters returned for a single line; overflow is truncated with a suffix. */
+  maxLineLength: number
+  /** Maximum bytes of selected output; overflow stops the scan and marks `truncatedByBytes`. */
+  maxBytes: number
 }
 
 /** One line returned from a text file. */
@@ -58,16 +58,12 @@ export interface WindowResult {
 export interface FileReadOutcome {
   /** 1-based first line requested. */
   offset: number
-  /** Maximum number of lines requested. */
-  limit: number
   /** Returned lines, already numbered. */
   lines: FileTextLine[]
   /** Total line count in the file, unless `truncatedByBytes` stopped scanning early. */
   totalLines: number
   /** Whether selected output hit the byte cap before EOF or the requested limit. */
   truncatedByBytes?: true
-  /** Opaque version of the file at read time. */
-  version: FsVersion
 }
 
 interface WindowAccumulator {
@@ -82,8 +78,8 @@ function newAccumulator(): WindowAccumulator {
   return { lines: [], totalLines: 0, outputBytes: 0, truncatedByBytes: false, done: false }
 }
 
-function truncateLine(line: string): string {
-  return line.length > READ_MAX_LINE_LENGTH ? `${line.substring(0, READ_MAX_LINE_LENGTH)}${READ_MAX_LINE_SUFFIX}` : line
+function truncateLine(line: string, maxLineLength: number): string {
+  return line.length > maxLineLength ? `${line.substring(0, maxLineLength)}... (line truncated to ${maxLineLength} chars)` : line
 }
 
 function lineByteSize(line: string, currentLineCount: number): number {
@@ -94,9 +90,9 @@ function consumeLine(acc: WindowAccumulator, rawLine: string, request: ReadWindo
   acc.totalLines += 1
   if (acc.totalLines < request.offset || acc.lines.length >= request.limit) return
 
-  const text = truncateLine(rawLine)
+  const text = truncateLine(rawLine, request.maxLineLength)
   const bytes = lineByteSize(text, acc.lines.length)
-  if (acc.outputBytes + bytes > READ_MAX_BYTES) {
+  if (acc.outputBytes + bytes > request.maxBytes) {
     acc.truncatedByBytes = true
     acc.done = true
     return
@@ -121,7 +117,7 @@ function finish(acc: WindowAccumulator, request: ReadWindow, displayPath: string
  * Accepts an `AsyncIterable<string>` (a chunked `streamText`) or an
  * `Iterable<string>` (a whole-file `readText` wrapped as `[text]`), so one code
  * path serves both. Scans for newlines with a capped line buffer (a newline-free
- * giant line is truncated, never buffered past {@link READ_MAX_LINE_LENGTH}),
+ * giant line is truncated, never buffered past `request.maxLineLength`),
  * enforces the byte cap, and throws `FS_NOT_FOUND` for an offset past EOF.
  */
 export async function buildWindow(
@@ -130,12 +126,14 @@ export async function buildWindow(
   displayPath: string,
 ): Promise<WindowResult> {
   const acc = newAccumulator()
+  // One char past the truncation point is enough to prove a line overflows.
+  const lineBufferCap = request.maxLineLength + 1
   let lineBuffer = ''
 
   function appendToLineBuffer(segment: string): void {
-    if (lineBuffer.length >= LINE_BUFFER_CAP) return
+    if (lineBuffer.length >= lineBufferCap) return
     lineBuffer += segment
-    if (lineBuffer.length > LINE_BUFFER_CAP) lineBuffer = lineBuffer.slice(0, LINE_BUFFER_CAP)
+    if (lineBuffer.length > lineBufferCap) lineBuffer = lineBuffer.slice(0, lineBufferCap)
   }
 
   function flushLine(): void {

packages/fs/tool-fs/src/read.ts

@@ -23,12 +23,27 @@ import { buildWindow, formatReadOutput } from './read-render.ts'
 import type { FileReadOutcome } from './read-render.ts'
 import { sessionCwd } from './session-cwd.ts'
 
-/** Default and maximum number of lines returned by one `read` call. */
+/** Default and maximum number of lines returned by one `read` call (the `readLimit` config). */
 export const READ_LIMIT = 2000
 
-/** Files at or above this size stream; smaller files read whole into memory. */
+/**
+ * Default streaming threshold (the `readStreamMinSize` config): files at or
+ * above this size stream; smaller files read whole into memory.
+ */
 export const STREAM_MIN_SIZE = 10 * 1024 * 1024
 
+/** Resolved read-tool caps — plugin config after defaulting (see `Config` in index.ts). */
+export interface ReadToolCaps {
+  /** Default and maximum number of lines returned by one call. */
+  limit: number
+  /** Maximum characters returned for a single line. */
+  maxLineLength: number
+  /** Maximum bytes returned for selected file lines. */
+  maxBytes: number
+  /** Files at or above this size stream; smaller files read whole into memory. */
+  streamMinSize: number
+}
+
 /** Validated `read` arguments after defaulting. */
 interface ReadInput {
   filePath: string
@@ -43,17 +58,17 @@ function parsePositiveInteger(value: number, name: string): number {
   return value
 }
 
-/** Validate value constraints the schema DSL can't express. */
-export function parseReadArgs(args: { file_path: string; offset?: number; limit?: number }): ReadInput {
+/** Validate value constraints the schema DSL can't express. `maxLimit` is the deployment's line cap. */
+export function parseReadArgs(args: { file_path: string; offset?: number; limit?: number }, maxLimit: number): ReadInput {
   if (args.file_path.trim().length === 0) throw new Error('file_path must be a non-empty string')
   const offset = args.offset === undefined ? 1 : parsePositiveInteger(args.offset, 'offset')
-  const limit = args.limit === undefined ? READ_LIMIT : parsePositiveInteger(args.limit, 'limit')
-  if (limit > READ_LIMIT) throw new Error(`limit must be less than or equal to ${READ_LIMIT}`)
+  const limit = args.limit === undefined ? maxLimit : parsePositiveInteger(args.limit, 'limit')
+  if (limit > maxLimit) throw new Error(`limit must be less than or equal to ${maxLimit}`)
   return { filePath: args.file_path, offset, limit }
 }
 
 /** Register the `read` tool and its system-prompt guidance. */
-export function applyReadTool(ctx: Context): void {
+export function applyReadTool(ctx: Context, caps: ReadToolCaps): void {
   ctx.systemPrompt.section({
     name: 'tool:read',
     order: 100,
@@ -66,10 +81,10 @@ export function applyReadTool(ctx: Context): void {
     parameters: {
       file_path: { type: 'string', required: true, description: 'Path to read, resolved by the filesystem backend.' },
       offset: { type: 'number', description: '1-based first line to return. Defaults to 1.' },
-      limit: { type: 'number', description: `Maximum number of lines to return. Defaults to ${READ_LIMIT}.` },
+      limit: { type: 'number', description: `Maximum number of lines to return. Defaults to ${caps.limit}.` },
     },
     async execute(args, exec): Promise<ContentBlock[]> {
-      const input = parseReadArgs(args)
+      const input = parseReadArgs(args, caps.limit)
       const cwd = sessionCwd(exec)
       const target = await ctx.fs.resolve(input.filePath, cwd !== undefined ? { cwd } : undefined)
 
@@ -83,17 +98,19 @@ export function applyReadTool(ctx: Context): void {
 
       // Stream when the file is large OR size is unknown, so a size-less backend
       // never buffers an arbitrarily large file.
-      const chunks = info.size === undefined || info.size >= STREAM_MIN_SIZE
+      const chunks = info.size === undefined || info.size >= caps.streamMinSize
         ? await ctx.fs.streamText(target, exec.signal)
         : [await ctx.fs.readText(target, exec.signal)]
-      const window = await buildWindow(chunks, { offset: input.offset, limit: input.limit }, target.displayPath)
+      const window = await buildWindow(
+        chunks,
+        { offset: input.offset, limit: input.limit, maxLineLength: caps.maxLineLength, maxBytes: caps.maxBytes },
+        target.displayPath,
+      )
 
       const outcome: FileReadOutcome = {
         offset: input.offset,
-        limit: input.limit,
         lines: window.lines,
         totalLines: window.totalLines,
-        version: info.version,
         ...window.truncatedByBytes ? { truncatedByBytes: true } : {},
       }
       // Record the observed version (a no-op when no policy plugin listens). The
@@ -106,7 +123,8 @@ export function applyReadTool(ctx: Context): void {
     // appended (`Read foo.txt (5 - 8)`), `read` kind (icon), and a follow-along
     // location whose line is the read's offset (defaulting to 1). The window is
     // derived from the RAW args (offset/limit as the model passed them), NOT the
-    // tool's defaulted 1/READ_LIMIT, so an unbounded read shows a bare title.
+    // tool's defaulted 1/configured limit, so an unbounded read shows a bare
+    // title (and the presenter stays a pure function of args, config-free).
     presentCall(args): GenericCallView {
       const { offset, limit } = args
       const window = limit !== undefined && limit > 0