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refactor(telemetry): ship the redact waterfall without built-in rules

The seam keeps the telemetry/redact scrubbing interface but ships no rules
of its own: the innermost next() passes records through unchanged, and
deployments mount their rules as waterfall listeners. As an SDK we cannot
know which patterns are secrets in a given deployment; a shipped list
invites false confidence while catching only known shapes, and false
positives would corrupt exported bodies. Mechanism stays with the seam,
policy moves to the deployment; both READMEs and the Agent Note state the
raw-export default plainly.

The loader-composition e2e now mounts a deployment-style rule fixture and
pins the same wire behavior: secret absent, placeholder present, canonical
log untouched.
kingwl 1 month ago
parent
commit
70febffe1a

+ 2 - 2
.agents/notes/implemented/feature/2026-07-23-session-telemetry-otel-revival.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
-2026-07-23-session-telemetry-otel-revival.md: 1150d363e9db98a39e1188b86dc41fa291edba41
-2026-07-23-session-telemetry-otel-revival.zh.md: 76749a59c38ef2b8c5b3f09960ca500c25d8e1a8
+2026-07-23-session-telemetry-otel-revival.md: 28a88218566dcfe34a3b99b682a4c21d22e00ce2
+2026-07-23-session-telemetry-otel-revival.zh.md: 79428c5fbb76bdd8f3c2d0b856edd712b6a650d0

+ 5 - 5
.agents/notes/implemented/feature/2026-07-23-session-telemetry-otel-revival.md

@@ -10,10 +10,10 @@ Every deployment that wants harness sessions in an observability stack must hand
 
 ## Decision
 
-`packages/telemetry/` revives the two reviewed packages under the SDK stance — the harness provides the capability, the deployment configures where records go, and nothing crosses the seam unredacted:
+`packages/telemetry/` revives the two reviewed packages under the SDK stance — the harness provides the capability, the deployment configures where records go and owns what leaves in them:
 
 - **`@deepseek-ai/dsh-session-telemetry`** — the seam. `TelemetryBackend` (`emit`/`flush?`/`shutdown`), the service-registered `Telemetry` form, and `TelemetryCoordinator` owning capture: adoption with cursor read-back, the per-append firehose (project → `structuredClone` → redact → `emit`, zero I/O), the fixed first-chunk-per-(turn, step) projection, the `agent/error` relay, and dispose-time `shutdown` records.
-- **The `telemetry/redact` waterfall** — the delta over the branch version. Every record passes it before reaching any backend; the innermost `next()` applies a conservative built-in rule set (credential shapes: API keys, GitHub/Slack tokens, AWS/Google keys, JWTs, PEM blocks, URL userinfo), deployments stack stricter rules as listeners, and a throwing rule withholds the record fail-closed. The pattern list is a security invariant, deliberately not configurable. Redaction applies to the exported copy only; the canonical log is never rewritten.
+- **The `telemetry/redact` waterfall** — the delta over the branch version. Every record passes it before reaching any backend; the seam ships NO rules of its own — the innermost `next()` is a pass-through, deployments mount their rules as listeners (stacking by transforming `next()`'s return value), and a throwing rule withholds the record fail-closed. Redaction applies to the exported copy only; the canonical log is never rewritten.
 - **`@deepseek-ai/dsh-session-telemetry-otel`** — the reference backend: OTel JS SDK log pipeline (`LoggerProvider` → `BatchLogRecordProcessor` → OTLP/HTTP exporter), configured verbatim through `exporter`/`processor` passthroughs. `exporter.url` is required and validated at load; unmounted or unconfigured, nothing leaves the process.
 
 The boundary axiom holds: the harness's aspect ends at `emit()`. Batching, retry, queueing, and loss policy are the reporting SDK's, configured through passthroughs — delivery is best-effort (at-most-once across a crash), which the READMEs state plainly.
@@ -22,12 +22,12 @@ The boundary axiom holds: the harness's aspect ends at `emit()`. Batching, retry
 
 **Implement the runtime-telemetry RFC's outbox (durable spool, per-sink cursors, at-least-once, a `readCommitted` persistence-seam method).** Deferred, not rejected: the SDK stance makes delivery semantics the reporting SDK's territory, and the OTel SDK's own batch pipeline is the honest default. The outbox is a pure additive layer (the `emit()` contract does not move); revive it when a deployment states a crash-loss requirement telemetry must satisfy.
 
-**Export without built-in redaction, delegating to receiver-side collector processors.** Rejected — this is what legal declined. Receiver-side redaction ships the secret first and scrubs it second; the seam must scrub before bytes leave the process, and a waterfall makes the redaction point auditable and stackable.
+**No in-process redaction point, delegating to receiver-side collector processors.** Rejected — receiver-side redaction ships the secret first and scrubs it second. The waterfall puts an auditable, stackable scrubbing point before bytes leave the process; where the branch version (what PR #222 shipped) had no redaction point at all, every record now passes one.
 
-**A configurable pattern list for the default rules.** Rejected: deployment-varying tunables belong in config, but a security invariant does not — weakening the floor should require code, not YAML. Stricter rules stack as `telemetry/redact` listeners.
+**A built-in conservative rule set as the waterfall's innermost `next()`.** Rejected: as an SDK we cannot know which patterns are secrets in a given deployment, a shipped list invites false confidence ("redaction is on") while catching only known shapes, and false positives would corrupt exported bodies for consumers who never asked. The seam owns the mechanism; the deployment owns the policy — the innermost `next()` is a pass-through, and rules mount as listeners.
 
 **Map onto OTel spans (GenAI semantic conventions) instead of logs.** Rejected for this revival: the branch implementation's log mapping is reviewed and shipped-shaped; the span model is lossy for forkable, interruptible sessions and belongs to a future consumer with real span queries to serve.
 
 ## Consequences
 
-A deployment adds one `cordis.yml` entry with an OTLP endpoint and gets its session stream in any OTel-compatible stack; removing the entry is the opt-out, with no residual state. Credential-shaped substrings never leave the process even on a rule-free deployment, at the cost of a synchronous per-record scrub on the capture path (string-regex over lossless-JSON bodies — bounded by event size, no I/O). Exported bodies can differ from canonical log bytes wherever the placeholder landed, so receivers must not treat telemetry as a byte-exact replica; the log remains the source of truth. Crash durability is explicitly out of scope until the outbox decision above is revisited.
+A deployment adds one `cordis.yml` entry with an OTLP endpoint and gets its session stream in any OTel-compatible stack; removing the entry is the opt-out, with no residual state. A rule-free deployment exports records exactly as captured — including any credentials embedded in file contents or command output — so a deployment crossing a trust boundary must mount `telemetry/redact` listeners, and both READMEs state this plainly. Where rules are mounted, exported bodies can differ from canonical log bytes, so receivers must not treat telemetry as a byte-exact replica; the log remains the source of truth. Crash durability is explicitly out of scope until the outbox decision above is revisited.

+ 5 - 5
.agents/notes/implemented/feature/2026-07-23-session-telemetry-otel-revival.zh.md

@@ -10,10 +10,10 @@ Status: implemented
 
 ## Decision
 
-`packages/telemetry/` 以 SDK 立场复活这两个经过评审的包——harness 提供能力,部署方配置上报去向,且任何数据未经脱敏不得跨越 seam
+`packages/telemetry/` 以 SDK 立场复活这两个经过评审的包——harness 提供能力,部署方配置上报去向并对导出内容负责
 
 - **`@deepseek-ai/dsh-session-telemetry`** —— seam 本体。`TelemetryBackend`(`emit`/`flush?`/`shutdown`)、服务注册形态的 `Telemetry`、以及拥有捕获侧的 `TelemetryCoordinator`:带游标回读的收养、逐 append 的 firehose(投影 → `structuredClone` → 脱敏 → `emit`,零 I/O)、固定的每 (turn, step) 首 chunk 投影、`agent/error` 转发、以及 dispose 时的 `shutdown` 记录。
-- **`telemetry/redact` waterfall** —— 相对分支版本的增量。每条记录抵达任何 backend 前必经此处;最内层 `next()` 应用保守的内置规则集(凭据形状:API key、GitHub/Slack token、AWS/Google key、JWT、PEM 块、URL userinfo),部署方以监听器堆叠更严规则,抛异常的规则将该记录 fail-closed 扣下。模式列表是安全不变量,刻意不可配置。脱敏只作用于导出副本;canonical log 永不改写。
+- **`telemetry/redact` waterfall** —— 相对分支版本的增量。每条记录抵达任何 backend 前必经此处;seam 自身不带任何规则——最内层 `next()` 原样透传,部署方以监听器挂载自己的规则(通过变换 `next()` 的返回值堆叠),抛异常的规则将该记录 fail-closed 扣下。脱敏只作用于导出副本;canonical log 永不改写。
 - **`@deepseek-ai/dsh-session-telemetry-otel`** —— 参考 backend:OTel JS SDK 日志管线(`LoggerProvider` → `BatchLogRecordProcessor` → OTLP/HTTP exporter),经 `exporter`/`processor` passthrough 原样配置。`exporter.url` 必填且加载时校验;未挂载或未配置时,任何数据都不会离开进程。
 
 边界公理保持不变:harness 的职责止于 `emit()`。批处理、重试、排队与丢失策略属于 reporting SDK,经 passthrough 配置——投递是尽力而为(崩溃时至多一次),README 对此如实陈述。
@@ -22,12 +22,12 @@ Status: implemented
 
 **实现 runtime-telemetry RFC 的 outbox(落盘 spool、每 sink 游标、at-least-once、persistence seam 的 `readCommitted` 方法)。** 推迟而非否决:SDK 立场使投递语义归属 reporting SDK,OTel SDK 自身的批处理管线是诚实的默认。outbox 是纯增量层(`emit()` 契约不动);待某个部署提出遥测必须满足的崩溃丢失要求时再复活。
 
-**不带内置脱敏直接导出,交给接收端 collector processor。** 否决——这正是法务否掉的方案。接收端脱敏是先把秘密发出去再擦除;seam 必须在字节离开进程前擦除,且 waterfall 使脱敏点可审计、可堆叠
+**不设进程内脱敏点,交给接收端 collector processor。** 否决——接收端脱敏是先把秘密发出去再擦除。waterfall 在字节离开进程前提供一个可审计、可堆叠的擦除点;分支版本(PR #222 交付的形态)完全没有脱敏点,如今每条记录都必经其一
 
-**默认规则的模式列表做成可配置。** 否决:随部署变化的调优项应进 config,但安全不变量不应——削弱底线应当需要改代码而非改 YAML。更严格的规则以 `telemetry/redact` 监听器堆叠
+**在 waterfall 最内层 `next()` 内置一套保守规则集。** 否决:作为 SDK 我们无法预知某个部署里什么模式算秘密,内置列表只覆盖已知形状却会带来"脱敏已开启"的虚假信心,且误报会替从未要求过的消费者破坏导出 body。seam 拥有机制,部署方拥有策略——最内层 `next()` 原样透传,规则以监听器挂载
 
 **映射到 OTel span(GenAI 语义约定)而非日志。** 本次复活否决:分支实现的日志映射已经过评审、形态可交付;span 模型对可 fork、可中断的会话有损,留给将来真正有 span 查询需求的消费者。
 
 ## Consequences
 
-部署方在 `cordis.yml` 加一个带 OTLP endpoint 的条目即可把会话流接入任何 OTel 兼容体系;删除条目即退出,无残留状态。即使部署方未配置任何规则,凭据形状的子串也绝不离开进程,代价是捕获路径上每条记录一次同步擦除(对 lossless-JSON body 做字符串正则——受事件大小约束,无 I/O)。导出的 body 在占位符落点处可能与 canonical log 字节不同,接收端不得把遥测当作字节精确副本;日志仍是唯一事实源。崩溃持久性在上述 outbox 决定重启前明确不在范围内。
+部署方在 `cordis.yml` 加一个带 OTLP endpoint 的条目即可把会话流接入任何 OTel 兼容体系;删除条目即退出,无残留状态。未挂载规则的部署导出的记录与捕获时完全一致——包括文件内容与命令输出中内嵌的任何凭据——因此跨信任边界的部署必须挂载 `telemetry/redact` 监听器,两个 README 对此如实陈述。挂载规则后,导出的 body 可能与 canonical log 字节不同,接收端不得把遥测当作字节精确副本;日志仍是唯一事实源。崩溃持久性在上述 outbox 决定重启前明确不在范围内。

+ 13 - 12
docs/cordis-catalog/events.md

@@ -807,20 +807,21 @@ Source: [`packages/core/system-prompt/src/index.ts:35`](../../packages/core/syst
 
 ### `telemetry/redact` — waterfall
 
-Redact one outbound record before it reaches the backend. The innermost `next()` applies the seam's conservative default rule set (credential-shape scrubbing); listeners stack stricter rules by transforming its return value, and returning without `next()` replaces the default — the exported record is then only as clean as the replacing rule. Dispatched synchronously on the capture hot path inside the coordinator's containment: a throwing listener withholds that one record (fail-closed) and never reaches the agent loop. Redaction applies to the exported copy only; the canonical session log is never rewritten.
+Redact one outbound record before it reaches the backend — the seam's scrubbing extension point. The seam ships NO rules of its own: the innermost `next()` passes the record through unchanged, and with no listener mounted records reach the backend as captured, so exported data is exactly as clean as the rules a deployment mounts. Listeners stack by transforming `next()`'s return value; returning without `next()` replaces everything beneath. Dispatched synchronously on the capture hot path inside the coordinator's containment: a throwing listener withholds that one record (fail-closed) and never reaches the agent loop. Redaction applies to the exported copy only; the canonical session log is never rewritten.
 
 ```ts cordis-catalog
 /**
- * Redact one outbound record before it reaches the backend. The innermost
- * `next()` applies the seam's conservative default rule set
- * (credential-shape scrubbing); listeners stack stricter rules by
- * transforming its return value, and returning without `next()` replaces
- * the default — the exported record is then only as clean as the
- * replacing rule. Dispatched synchronously on the capture hot path inside
- * the coordinator's containment: a throwing listener withholds that one
- * record (fail-closed) and never reaches the agent loop. Redaction
- * applies to the exported copy only; the canonical session log is never
- * rewritten.
+ * Redact one outbound record before it reaches the backend — the seam's
+ * scrubbing extension point. The seam ships NO rules of its own: the
+ * innermost `next()` passes the record through unchanged, and with no
+ * listener mounted records reach the backend as captured, so exported
+ * data is exactly as clean as the rules a deployment mounts. Listeners
+ * stack by transforming `next()`'s return value; returning without
+ * `next()` replaces everything beneath. Dispatched synchronously on the
+ * capture hot path inside the coordinator's containment: a throwing
+ * listener withholds that one record (fail-closed) and never reaches the
+ * agent loop. Redaction applies to the exported copy only; the canonical
+ * session log is never rewritten.
  * @param record - the candidate record, already the coordinator's own deep
  *   copy; listeners return a (possibly new) record and must not mutate it.
  * @mode waterfall
@@ -828,7 +829,7 @@ Redact one outbound record before it reaches the backend. The innermost `next()`
 'telemetry/redact'(record: TelemetryRecord, next: () => TelemetryRecord): TelemetryRecord
 ```
 
-Source: [`packages/telemetry/session-telemetry/src/index.ts:39`](../../packages/telemetry/session-telemetry/src/index.ts)
+Source: [`packages/telemetry/session-telemetry/src/index.ts:40`](../../packages/telemetry/session-telemetry/src/index.ts)
 
 ## `tools/*`
 

+ 1 - 1
docs/cordis-catalog/services.md

@@ -1554,7 +1554,7 @@ flush?(): void
 abstract shutdown(): Promise<void>
 ```
 
-Source: [`packages/telemetry/session-telemetry/src/index.ts:123`](../../packages/telemetry/session-telemetry/src/index.ts)
+Source: [`packages/telemetry/session-telemetry/src/index.ts:124`](../../packages/telemetry/session-telemetry/src/index.ts)
 
 ## `ctx.tokenMeter` — `TokenMeterService`
 

+ 1 - 1
docs/event-producer-consumer.md

@@ -43,7 +43,7 @@ This matrix shows which packages dispatch each harness-owned event and which pac
 | `subagent/start` | `emit` | [`packages/subagent/subagent/src/index.ts:130`](../packages/subagent/subagent/src/index.ts) | [`subagent`](../packages/subagent/subagent) (`events.dispatch`) | [`hooks-claude`](../packages/hooks/hooks-claude), [`subagent`](../packages/subagent/subagent) |
 | `system-prompt/assemble` | `waterfall` | [`packages/core/system-prompt/src/index.ts:29`](../packages/core/system-prompt/src/index.ts) | [`system-prompt`](../packages/core/system-prompt) (`waterfall`) | [`agent`](../packages/core/agent), [`system-prompt`](../packages/core/system-prompt) |
 | `system-prompt/change` | `emit` | [`packages/core/system-prompt/src/index.ts:35`](../packages/core/system-prompt/src/index.ts) | [`system-prompt`](../packages/core/system-prompt) (`emit`) | - |
-| `telemetry/redact` | `waterfall` | [`packages/telemetry/session-telemetry/src/index.ts:39`](../packages/telemetry/session-telemetry/src/index.ts) | [`session-telemetry`](../packages/telemetry/session-telemetry) (`waterfall`) | - |
+| `telemetry/redact` | `waterfall` | [`packages/telemetry/session-telemetry/src/index.ts:40`](../packages/telemetry/session-telemetry/src/index.ts) | [`session-telemetry`](../packages/telemetry/session-telemetry) (`waterfall`) | - |
 | `tools/change` | `emit` | [`packages/core/tools/src/index.ts:143`](../packages/core/tools/src/index.ts) | [`tools`](../packages/core/tools) (`emit`) | - |
 | `tools/execute` | `waterfall` | [`packages/core/tools/src/index.ts:113`](../packages/core/tools/src/index.ts) | [`tools`](../packages/core/tools) (`waterfall`) | [`session-checkpoint-policy`](../packages/session-persistence/session-checkpoint-policy), [`timeout-policy`](../packages/timeout/timeout-policy) |
 | `tools/post-execute` | `waterfall` | [`packages/core/tools/src/index.ts:125`](../packages/core/tools/src/index.ts) | [`tools`](../packages/core/tools) (`waterfall`) | [`hooks-claude`](../packages/hooks/hooks-claude), [`hooks-codex`](../packages/hooks/hooks-codex), [`repeat-tool-guard`](../packages/guard/repeat-tool-guard), [`spill-policy`](../packages/spill/spill-policy), [`tool-fs-search`](../packages/fs/tool-fs-search), [`workspace-context`](../packages/context/workspace-context) |

+ 5 - 0
examples/headless-agent/tests/fixtures/telemetry-otel.cordis.yml

@@ -1,8 +1,13 @@
 # Test-only composition: session-telemetry-otel through the real Loader/app
 # path, exporting to the mock OTLP collector the driver starts (url via env).
+# The redact-rule entry models a deployment mounting its own scrub rule on the
+# telemetry/redact waterfall — the seam itself ships no rules.
 - id: cli-mock-llm
   name: './cli-mock-llm.ts'
 
+- id: telemetry-redact-rule
+  name: './telemetry-redact-rule.ts'
+
 - id: bash
   name: '@deepseek-ai/dsh-bash-local'
 

+ 29 - 0
examples/headless-agent/tests/fixtures/telemetry-redact-rule.ts

@@ -0,0 +1,29 @@
+import type { Context } from 'cordis'
+
+/**
+ * Deployment-style redaction rule for the telemetry e2e: scrubs the fixture
+ * credential from body strings, exactly as a real deployment would mount its
+ * own rules on the `telemetry/redact` waterfall.
+ */
+
+const SECRET = /sk-e2efixture[0-9]+/g
+const PLACEHOLDER = '[E2E-REDACTED]'
+
+function scrub(value: unknown): unknown {
+  if (typeof value === 'string') return value.replace(SECRET, PLACEHOLDER)
+  if (Array.isArray(value)) return value.map(scrub)
+  if (value !== null && typeof value === 'object') {
+    return Object.fromEntries(Object.entries(value).map(([key, entry]) => [key, scrub(entry)]))
+  }
+  return value
+}
+
+export const name = 'telemetry-redact-rule'
+
+/** Mount the fixture scrub rule onto the redact waterfall. */
+export function apply(ctx: Context): void {
+  ctx.on('telemetry/redact', (_record, next) => {
+    const record = next()
+    return { ...record, body: scrub(record.body) }
+  })
+}

+ 1 - 0
knip.json

@@ -32,6 +32,7 @@
         "headless-agent/tests/fixtures/time-context-driver.ts",
         "headless-agent/tests/fixtures/time-context-mock-llm.ts",
         "headless-agent/tests/fixtures/telemetry-otel-driver.ts",
+        "headless-agent/tests/fixtures/telemetry-redact-rule.ts",
         "acp-agent/tests/snapshots/lsp-definition/workspace/subject.ts",
         "tui-agent/tests/fixtures/tui-scripted-llm.ts",
         "acp-agent/tests/fixtures/subagent/subagent-acp/mock-delegating-llm.ts",

+ 2 - 2
packages/cordis/tool-cordis/src/api-catalog.ts

@@ -1124,8 +1124,8 @@ export const EVENT_API: readonly EventApiEntry[] = [
     name: 'telemetry/redact',
     mode: 'waterfall',
     signature: '\'telemetry/redact\'(record: TelemetryRecord, next: () => TelemetryRecord): TelemetryRecord',
-    jsDoc: '/**\n * Redact one outbound record before it reaches the backend. The innermost\n * `next()` applies the seam\'s conservative default rule set\n * (credential-shape scrubbing); listeners stack stricter rules by\n * transforming its return value, and returning without `next()` replaces\n * the default — the exported record is then only as clean as the\n * replacing rule. Dispatched synchronously on the capture hot path inside\n * the coordinator\'s containment: a throwing listener withholds that one\n * record (fail-closed) and never reaches the agent loop. Redaction\n * applies to the exported copy only; the canonical session log is never\n * rewritten.\n * @param record - the candidate record, already the coordinator\'s own deep\n *   copy; listeners return a (possibly new) record and must not mutate it.\n * @mode waterfall\n */',
-    summary: 'Redact one outbound record before it reaches the backend.',
+    jsDoc: '/**\n * Redact one outbound record before it reaches the backend — the seam\'s\n * scrubbing extension point. The seam ships NO rules of its own: the\n * innermost `next()` passes the record through unchanged, and with no\n * listener mounted records reach the backend as captured, so exported\n * data is exactly as clean as the rules a deployment mounts. Listeners\n * stack by transforming `next()`\'s return value; returning without\n * `next()` replaces everything beneath. Dispatched synchronously on the\n * capture hot path inside the coordinator\'s containment: a throwing\n * listener withholds that one record (fail-closed) and never reaches the\n * agent loop. Redaction applies to the exported copy only; the canonical\n * session log is never rewritten.\n * @param record - the candidate record, already the coordinator\'s own deep\n *   copy; listeners return a (possibly new) record and must not mutate it.\n * @mode waterfall\n */',
+    summary: 'Redact one outbound record before it reaches the backend — the seam\'s scrubbing extension point.',
   },
   {
     name: 'tools/change',

+ 1 - 1
packages/telemetry/README.md

@@ -1,6 +1,6 @@
 # telemetry/
 
-Outbound session reporting: the telemetry seam plus its OpenTelemetry backend. The design — the boundary axiom (the harness's aspect ends at `emit()`; delivery is the reporting SDK's), the mandatory `telemetry/redact` waterfall, the fixed chunk projection, the handoff cursor, and the operational-record channel — is pinned in [the revival Agent Note](../../.agents/notes/implemented/feature/2026-07-23-session-telemetry-otel-revival.md).
+Outbound session reporting: the telemetry seam plus its OpenTelemetry backend. The design — the boundary axiom (the harness's aspect ends at `emit()`; delivery is the reporting SDK's), the `telemetry/redact` waterfall (deployment-mounted rules; the seam ships none), the fixed chunk projection, the handoff cursor, and the operational-record channel — is pinned in [the revival Agent Note](../../.agents/notes/implemented/feature/2026-07-23-session-telemetry-otel-revival.md).
 
 | Package | Role |
 |---|---|

+ 1 - 1
packages/telemetry/session-telemetry-otel/README.md

@@ -19,7 +19,7 @@ The OpenTelemetry backend for [the telemetry seam](../session-telemetry/) — th
 
 ## What leaves the machine
 
-Records carry the seam's REDACTED copy of `event.data` — user and assistant message content, tool arguments and results (command output, file contents), the full system prompt and tool schemas (`request/header`), todo text, compaction summaries, hook `stderrSummary`, and the session `cwd` (a local path) — after the seam's `telemetry/redact` waterfall has scrubbed credential-shaped substrings (see [the seam README](../session-telemetry/README.md#the-redact-waterfall)). Provider credentials never appear regardless: adapter API keys are constructor parameters, not session events, so they are structurally absent from the log and therefore from telemetry. A deployment with stricter requirements stacks `telemetry/redact` listeners or opts out structurally.
+Records carry the complete `event.data` as the seam's `telemetry/redact` waterfall returns it — user and assistant message content, tool arguments and results (command output, file contents), the full system prompt and tool schemas (`request/header`), todo text, compaction summaries, hook `stderrSummary`, and the session `cwd` (a local path). The seam ships no redaction rules: with no `telemetry/redact` listener mounted, that is the raw captured copy, so a deployment exporting beyond a trusted boundary mounts its own rules (see [the seam README](../session-telemetry/README.md#the-redact-waterfall)). Provider credentials never appear regardless: adapter API keys are constructor parameters, not session events, so they are structurally absent from the log and therefore from telemetry.
 
 ## Field mapping
 

+ 8 - 7
packages/telemetry/session-telemetry-otel/tests/loader-composition.e2e.ts

@@ -3,8 +3,8 @@
  * a subprocess (per testing policy, through the same app/boot path a
  * deployment uses), run one mocked-model turn with a real bash round trip,
  * and assert against what the mock OTLP collector actually received on the
- * wire: ledger mirroring, default redaction, ops markers, and the untouched
- * canonical log.
+ * wire: ledger mirroring, the deployment-mounted redact rule applied to the
+ * exported copy, ops markers, and the untouched canonical log.
  */
 
 import { readFile, readdir } from 'node:fs/promises'
@@ -12,7 +12,6 @@ import { join } from 'node:path'
 import { fileURLToPath } from 'node:url'
 import { describe, expect, it } from 'vitest'
 import { LOADER_SMOKE_TEST_TIMEOUT_MS, runLoaderSmoke } from '@deepseek-ai/dsh-loader-smoke'
-import { REDACTION_PLACEHOLDER } from '@deepseek-ai/dsh-session-telemetry'
 
 const driver = fileURLToPath(new URL(
   '../../../../examples/headless-agent/tests/fixtures/telemetry-otel-driver.ts',
@@ -25,6 +24,7 @@ const configPath = fileURLToPath(new URL(
 const repoTsconfig = fileURLToPath(new URL('../../../../tsconfig.json', import.meta.url))
 
 const FIXTURE_SECRET = 'sk-e2efixture1234567890'
+const FIXTURE_PLACEHOLDER = '[E2E-REDACTED]'
 
 interface OtlpLogRecord {
   attributes?: { key: string; value: Record<string, unknown> }[]
@@ -84,15 +84,16 @@ describe('session-telemetry-otel through a real headless cordis.yml', () => {
     }
     expect(records.some(({ scope }) => scope.endsWith('/ops'))).toBe(true)
 
-    // Default redaction on the wire: the fixture credential never leaves the
-    // process, its surrounding prose does, and the placeholder marks the spot.
+    // The deployment-mounted rule on the wire: the fixture credential never
+    // leaves the process, its surrounding prose does, and the placeholder
+    // marks the spot — the seam itself ships no rules.
     const wire = JSON.stringify(captures)
     expect(wire).not.toContain(FIXTURE_SECRET)
-    expect(wire).toContain(REDACTION_PLACEHOLDER)
+    expect(wire).toContain(FIXTURE_PLACEHOLDER)
     expect(wire).toContain('prove telemetry with key')
 
     // The canonical session log is never rewritten.
     expect(logContent).toContain(FIXTURE_SECRET)
-    expect(logContent).not.toContain(REDACTION_PLACEHOLDER)
+    expect(logContent).not.toContain(FIXTURE_PLACEHOLDER)
   }, LOADER_SMOKE_TEST_TIMEOUT_MS)
 })

+ 2 - 2
packages/telemetry/session-telemetry/README.md

@@ -12,7 +12,7 @@ The coordinator registers, all through the composing fiber's effects: `session/c
 
 ## The redact waterfall
 
-Every record passes the `telemetry/redact` waterfall between projection and `emit()` — nothing reaches a backend unredacted. The innermost `next()` applies the built-in conservative rule set (`applyDefaultRedaction`: credential shapes — API keys, GitHub/Slack tokens, AWS/Google keys, JWTs, PEM blocks, URL userinfo — replaced with `[REDACTED]` in body strings and string attribute values). Listeners stack stricter rules by transforming `next()`'s return value; returning without `next()` replaces the default rule set, and a throwing listener withholds that one record fail-closed inside the coordinator's containment. The built-in pattern list is a security invariant, deliberately not configurable from cordis.yml. Redaction applies to the exported copy only; the canonical session log is never rewritten.
+Every record passes the `telemetry/redact` waterfall between projection and `emit()` — the seam's scrubbing extension point. The seam ships NO rules of its own: the innermost `next()` passes the record through unchanged, so with no listener mounted records reach the backend exactly as captured, and exported data is precisely as clean as the rules a deployment mounts. Listeners stack by transforming `next()`'s return value; returning without `next()` replaces everything beneath, and a throwing listener withholds that one record fail-closed inside the coordinator's containment. Redaction applies to the exported copy only; the canonical session log is never rewritten.
 
 ## The handoff cursor
 
@@ -37,4 +37,4 @@ None; this package neither assembles nor sends a provider request.
 ## Known Limitations and Deferred Work
 
 - **Best-effort delivery** — the cursor marks handed-off, not delivered; a session torn down inside a reload window cannot be re-adopted; whatever sits in a backend queue at crash time is lost. A durable outbox (spool, per-sink cursors, at-least-once) is deferred until a deployment states a crash-loss requirement — see [the revival Agent Note](../../../.agents/notes/implemented/feature/2026-07-23-session-telemetry-otel-revival.md).
-- **Redaction is shape-based** — the default rules catch known credential shapes, not every secret; a deployment with stricter needs stacks `telemetry/redact` listeners, and exported data is only as clean as the mounted rules.
+- **No built-in redaction rules** — with no `telemetry/redact` listener mounted, records leave the process exactly as captured, including any credentials embedded in file contents or command output; a deployment exporting to a shared collector owns its rule set.

+ 9 - 9
packages/telemetry/session-telemetry/src/coordinator.ts

@@ -2,10 +2,11 @@
  * Capture coordinator: the seam's upstream half. Subscribes to the session
  * firehose plus the one live-bus relay (`agent/error`), applies the fixed
  * chunk projection, builds logical records, runs each through the
- * `telemetry/redact` waterfall, and hands the redacted copy to the backend —
- * synchronously, with every handler self-contained so a failing backend can
- * never starve other subscribers (cordis `emit` is stop-on-throw) or touch
- * the agent loop. Composed by a backend in its constructor.
+ * `telemetry/redact` waterfall (deployment-mounted rules; pass-through when
+ * none), and hands the result to the backend — synchronously, with every
+ * handler self-contained so a failing backend can never starve other
+ * subscribers (cordis `emit` is stop-on-throw) or touch the agent loop.
+ * Composed by a backend in its constructor.
  *
  * @module @deepseek-ai/dsh-session-telemetry/coordinator
  */
@@ -14,7 +15,6 @@ import type { Context } from 'cordis'
 import type { Session, SessionEvent } from '@deepseek-ai/dsh-session'
 import type { Agent } from '@deepseek-ai/dsh-agent'
 import type { TelemetryBackend, TelemetryRecord, TelemetrySeverity } from './index.ts'
-import { applyDefaultRedaction } from './redact.ts'
 
 /**
  * The handoff cursor: per session, the highest `seq` handed to a backend.
@@ -145,13 +145,13 @@ export class TelemetryCoordinator {
 
   /**
    * Run the `telemetry/redact` waterfall over one record and hand the result
-   * to the backend. The innermost `next` applies the seam's conservative
-   * default rules, so an unconfigured deployment still never exports raw
-   * credential shapes; callers run inside {@link contain}, so a throwing
+   * to the backend. The innermost `next` passes the record through unchanged
+   * — the seam ships no rules; exported data is as clean as the listeners a
+   * deployment mounts. Callers run inside {@link contain}, so a throwing
    * rule withholds the record instead of reaching the loop (fail-closed).
    */
   private handOff(record: TelemetryRecord): void {
-    this.backend.emit(this.ctx.waterfall('telemetry/redact', record, () => applyDefaultRedaction(record)))
+    this.backend.emit(this.ctx.waterfall('telemetry/redact', record, () => record))
   }
 
   /** Forward the turn-end boundary to the backend's optional flush hint. */

+ 11 - 11
packages/telemetry/session-telemetry/src/index.ts

@@ -22,16 +22,17 @@ declare module 'cordis' {
 
   interface Events {
     /**
-     * Redact one outbound record before it reaches the backend. The innermost
-     * `next()` applies the seam's conservative default rule set
-     * (credential-shape scrubbing); listeners stack stricter rules by
-     * transforming its return value, and returning without `next()` replaces
-     * the default — the exported record is then only as clean as the
-     * replacing rule. Dispatched synchronously on the capture hot path inside
-     * the coordinator's containment: a throwing listener withholds that one
-     * record (fail-closed) and never reaches the agent loop. Redaction
-     * applies to the exported copy only; the canonical session log is never
-     * rewritten.
+     * Redact one outbound record before it reaches the backend — the seam's
+     * scrubbing extension point. The seam ships NO rules of its own: the
+     * innermost `next()` passes the record through unchanged, and with no
+     * listener mounted records reach the backend as captured, so exported
+     * data is exactly as clean as the rules a deployment mounts. Listeners
+     * stack by transforming `next()`'s return value; returning without
+     * `next()` replaces everything beneath. Dispatched synchronously on the
+     * capture hot path inside the coordinator's containment: a throwing
+     * listener withholds that one record (fail-closed) and never reaches the
+     * agent loop. Redaction applies to the exported copy only; the canonical
+     * session log is never rewritten.
      * @param record - the candidate record, already the coordinator's own deep
      *   copy; listeners return a (possibly new) record and must not mutate it.
      * @mode waterfall
@@ -142,4 +143,3 @@ export abstract class Telemetry extends Service implements TelemetryBackend {
 }
 
 export { TelemetryCoordinator } from './coordinator.ts'
-export { applyDefaultRedaction, REDACTION_PLACEHOLDER } from './redact.ts'

+ 0 - 77
packages/telemetry/session-telemetry/src/redact.ts

@@ -1,77 +0,0 @@
-/**
- * Conservative default redaction for outbound telemetry records.
- *
- * Session-event bodies carry file contents and command output that may embed
- * credentials; nothing may cross the seam to a backend unredacted. This module
- * is the innermost rule set of the `telemetry/redact` waterfall — always
- * applied unless an outer listener deliberately replaces the whole chain. It
- * scrubs credential-SHAPED substrings from every string in the record body,
- * leaving structure (keys, nesting, surrounding prose) intact. The pattern
- * list is a security invariant, deliberately not configurable; deployments
- * add stricter rules by stacking `telemetry/redact` listeners.
- *
- * @module @deepseek-ai/dsh-session-telemetry/redact
- */
-
-import type { TelemetryRecord } from './index.ts'
-
-/** Replacement text substituted for each detected credential-shaped span. */
-export const REDACTION_PLACEHOLDER = '[REDACTED]'
-
-/**
- * Well-known credential shapes. A match anywhere inside a body string is
- * replaced; low-signal values (package names, versions, git SHAs, plain URLs)
- * deliberately stay untouched — they are the observability signal.
- */
-const SECRET_PATTERNS: readonly RegExp[] = [
-  /sk-(?:ant-)?[A-Za-z0-9_-]{10,}/g, // DeepSeek / OpenAI / Anthropic API keys
-  /gh[pousr]_[A-Za-z0-9]{16,}/g, // GitHub personal/oauth/server/refresh tokens
-  /github_pat_[A-Za-z0-9_]{20,}/g, // GitHub fine-grained PAT
-  /xox[baprs]-[A-Za-z0-9-]{10,}/g, // Slack tokens
-  /AKIA[0-9A-Z]{16}/g, // AWS access key id
-  /AIza[0-9A-Za-z_-]{35}/g, // Google API key
-  /eyJ[A-Za-z0-9_-]{8,}\.[A-Za-z0-9_-]{8,}\.[A-Za-z0-9_-]{8,}/g, // JWT
-  /-----BEGIN [A-Z ]*PRIVATE KEY-----[\s\S]*?-----END [A-Z ]*PRIVATE KEY-----/g, // PEM blocks
-  /\b(?<scheme>[a-z][a-z0-9+.-]*):\/\/[^/\s:@]+:[^/\s:@]+@/g, // URL userinfo credentials
-]
-
-/** Replace every known credential shape inside one string. */
-function scrub(text: string): string {
-  let out = text
-  for (const pattern of SECRET_PATTERNS) {
-    out = out.replace(pattern, REDACTION_PLACEHOLDER)
-  }
-  return out
-}
-
-/**
- * Deep-scrub every string inside a lossless-JSON value, preserving structure.
- * The record body is the coordinator's own `structuredClone` — mutation-free
- * rebuilding keeps the exported copy independent of the canonical log either way.
- */
-function scrubValue(value: unknown): unknown {
-  if (typeof value === 'string') return scrub(value)
-  if (Array.isArray(value)) return value.map(scrubValue)
-  if (value !== null && typeof value === 'object') {
-    const out: Record<string, unknown> = {}
-    for (const [key, entry] of Object.entries(value)) out[key] = scrubValue(entry)
-    return out
-  }
-  return value
-}
-
-/**
- * Apply the conservative default rule set to one record — the innermost
- * `next` of the `telemetry/redact` waterfall. Attribute VALUES are scrubbed
- * alongside the body (identity attributes are seam-built and boring, but
- * `session.cwd` is caller-supplied); attribute keys are seam-owned constants.
- * @param record - the candidate record; not mutated.
- * @returns a redacted copy safe to hand to a backend.
- */
-export function applyDefaultRedaction(record: TelemetryRecord): TelemetryRecord {
-  const attributes: Record<string, string | number> = {}
-  for (const [key, value] of Object.entries(record.attributes)) {
-    attributes[key] = typeof value === 'string' ? scrub(value) : value
-  }
-  return { ...record, attributes, body: scrubValue(record.body) }
-}

+ 53 - 94
packages/telemetry/session-telemetry/tests/redact.spec.ts

@@ -1,91 +1,19 @@
 /**
- * Default redaction rules and the `telemetry/redact` waterfall contract:
- * credential shapes scrubbed from bodies and attribute values, structure
- * preserved, canonical log untouched, listener stacking/replacement, and the
- * fail-closed containment of a throwing rule.
+ * The `telemetry/redact` waterfall contract: pass-through when no listener is
+ * mounted, listener stacking and replacement, ops-record coverage, the
+ * untouched canonical log, and the fail-closed containment of a throwing rule.
  */
 
 import { describe, expect, it } from 'vitest'
 import { Context } from 'cordis'
 import SessionStore, { SessionId } from '@deepseek-ai/dsh-session'
 import {
-  applyDefaultRedaction,
-  REDACTION_PLACEHOLDER,
   TelemetryCoordinator,
   type TelemetryBackend,
   type TelemetryRecord,
 } from '../src/index.ts'
 
-const SECRETS = {
-  deepseek: 'sk-abcdef1234567890abcdef',
-  anthropic: 'sk-ant-abcdef1234567890',
-  githubPat: 'ghp_ABCDEFGHIJKLMNOPqrstuv12345678',
-  finePat: 'github_pat_ABCDEFGHIJKLMNOPQRSTuvwx',
-  slack: 'xoxb-1234567890-abcdefghij',
-  aws: 'AKIAIOSFODNN7EXAMPLE',
-  google: 'AIzaSyA-1234567890abcdefghijklmnopqrstu',
-  jwt: 'eyJhbGciOiJIUzI1NiJ9.eyJzdWIiOiIxMjM0NTY3ODkwIn0.SflKxwRJSMeKKF2QT4fwpM',
-  pem: '-----BEGIN RSA PRIVATE KEY-----\nMIIEow\n-----END RSA PRIVATE KEY-----',
-  urlCreds: 'https://user:hunter2@internal.example.com/repo.git',
-} as const
-
-function record(body: unknown, attributes: Record<string, string | number> = {}): TelemetryRecord {
-  return { channel: 'ledger', time: 1, severity: 'info', attributes, body }
-}
-
-describe('applyDefaultRedaction', () => {
-  it('scrubs every known credential shape while preserving surrounding text', () => {
-    for (const secret of Object.values(SECRETS)) {
-      const out = applyDefaultRedaction(record(`before ${secret} after`))
-      expect(out.body, secret).not.toContain(secret.includes('\n') ? 'MIIEow' : secret)
-      expect(out.body).toContain('before ')
-      expect(out.body).toContain(' after')
-      expect(out.body).toContain(REDACTION_PLACEHOLDER)
-    }
-  })
-
-  it('scrubs URL userinfo credentials but leaves plain URLs alone', () => {
-    const out = applyDefaultRedaction(record(`${SECRETS.urlCreds} and https://example.com/path`))
-    expect(out.body).not.toContain('hunter2')
-    expect(out.body).toContain('https://example.com/path')
-  })
-
-  it('recurses through arrays and objects, preserving structure and non-strings', () => {
-    const out = applyDefaultRedaction(record({
-      list: [`key=${SECRETS.deepseek}`, 7, null, true],
-      nested: { text: SECRETS.githubPat, count: 3 },
-    }))
-    expect(out.body).toEqual({
-      list: [`key=${REDACTION_PLACEHOLDER}`, 7, null, true],
-      nested: { text: REDACTION_PLACEHOLDER, count: 3 },
-    })
-  })
-
-  it('leaves low-signal values untouched', () => {
-    const clean = {
-      pkg: '@deepseek-ai/dsh-session-telemetry@0.0.1',
-      sha: '342a4c3a9d3adf13cf4ad33b9f8d6e79170be5e2',
-      prose: 'ordinary sentence with kebab-case-identifier',
-    }
-    expect(applyDefaultRedaction(record(clean)).body).toEqual(clean)
-  })
-
-  it('scrubs string attribute values and keeps numeric ones', () => {
-    const out = applyDefaultRedaction(record(null, {
-      'session.cwd': `/home/${SECRETS.aws}/proj`,
-      'event.seq': 4,
-    }))
-    expect(out.attributes['session.cwd']).toBe(`/home/${REDACTION_PLACEHOLDER}/proj`)
-    expect(out.attributes['event.seq']).toBe(4)
-  })
-
-  it('never mutates its input', () => {
-    const input = record({ text: SECRETS.slack }, { 'session.cwd': SECRETS.aws })
-    applyDefaultRedaction(input)
-    expect((input.body as { text: string }).text).toBe(SECRETS.slack)
-    expect(input.attributes['session.cwd']).toBe(SECRETS.aws)
-  })
-})
+const FIXTURE_SECRET = 'sk-fixture1234567890'
 
 class CollectingBackend implements TelemetryBackend {
   records: TelemetryRecord[] = []
@@ -99,49 +27,80 @@ async function setup() {
   const backend = new CollectingBackend()
   const ctx = new Context()
   await ctx.plugin(SessionStore)
-  await ctx.plugin({
+  const fiber = await ctx.plugin({
     name: 'fake-telemetry',
     inject: ['sessions'],
     apply: (inner: Context) => void new TelemetryCoordinator(inner, backend),
   })
-  return { ctx, backend }
+  return { ctx, backend, fiber }
 }
 
 describe('telemetry/redact waterfall', () => {
-  it('applies the default rules when no listener is registered', async () => {
+  it('passes records through unchanged when no listener is mounted', async () => {
     const { ctx, backend } = await setup()
     const session = ctx.sessions.create(SessionId('w'))
-    session.append('user/message', { content: [{ type: 'text', text: `key ${SECRETS.deepseek}` }], source: { kind: 'user' } }, { surfaceOp: 'append' })
+    session.append('user/message', { content: [{ type: 'text', text: `key ${FIXTURE_SECRET}` }], source: { kind: 'user' } }, { surfaceOp: 'append' })
     const body = backend.records[0]!.body as { content: { text: string }[] }
-    expect(body.content[0]!.text).toBe(`key ${REDACTION_PLACEHOLDER}`)
+    expect(body.content[0]!.text).toBe(`key ${FIXTURE_SECRET}`)
   })
 
-  it('keeps the canonical log unredacted', async () => {
+  it('applies a mounted rule to every outbound record, ops records included', async () => {
+    const { ctx, backend, fiber } = await setup()
+    ctx.on('telemetry/redact', (_record, next) => {
+      const record = next()
+      return { ...record, body: { scrubbed: true } }
+    })
+    const session = ctx.sessions.create(SessionId('rule'))
+    session.append('user/message', { content: [{ type: 'text', text: FIXTURE_SECRET }], source: { kind: 'user' } }, { surfaceOp: 'append' })
+    expect(backend.records[0]!.body).toEqual({ scrubbed: true })
+    // The dispose-time shutdown ops record passes through the same waterfall.
+    await fiber.dispose()
+    const ops = backend.records.filter(record => record.channel === 'ops')
+    expect(ops).toHaveLength(1)
+    expect(ops[0]!.body).toEqual({ scrubbed: true })
+  })
+
+  it('keeps the canonical log untouched by a mounted rule', async () => {
     const { ctx } = await setup()
+    ctx.on('telemetry/redact', (_record, next) => ({ ...next(), body: null }))
     const session = ctx.sessions.create(SessionId('log'))
-    session.append('user/message', { content: [{ type: 'text', text: SECRETS.githubPat }], source: { kind: 'user' } }, { surfaceOp: 'append' })
+    session.append('user/message', { content: [{ type: 'text', text: FIXTURE_SECRET }], source: { kind: 'user' } }, { surfaceOp: 'append' })
     const logged = session.events[0]!.data as { content: { text: string }[] }
-    expect(logged.content[0]!.text).toBe(SECRETS.githubPat)
+    expect(logged.content[0]!.text).toBe(FIXTURE_SECRET)
   })
 
-  it('lets a listener stack a stricter rule on top of the defaults', async () => {
+  it('stacks listeners outermost-first around next()', async () => {
     const { ctx, backend } = await setup()
+    const order: string[] = []
     ctx.on('telemetry/redact', (_record, next) => {
-      const defaulted = next()
-      return { ...defaulted, body: { shapeOnly: true } }
+      order.push('outer-before')
+      const record = next()
+      order.push('outer-after')
+      return { ...record, attributes: { ...record.attributes, outer: 1 } }
+    })
+    ctx.on('telemetry/redact', (_record, next) => {
+      order.push('inner')
+      const record = next()
+      return { ...record, attributes: { ...record.attributes, inner: 1 } }
     })
     const session = ctx.sessions.create(SessionId('stack'))
-    session.append('user/message', { content: [{ type: 'text', text: 'anything' }], source: { kind: 'user' } }, { surfaceOp: 'append' })
-    expect(backend.records[0]!.body).toEqual({ shapeOnly: true })
+    session.append('user/message', { content: [{ type: 'text', text: 'hi' }], source: { kind: 'user' } }, { surfaceOp: 'append' })
+    expect(order).toEqual(['outer-before', 'inner', 'outer-after'])
+    expect(backend.records[0]!.attributes).toMatchObject({ outer: 1, inner: 1 })
   })
 
-  it('a listener that skips next() replaces the default rules', async () => {
+  it('a listener that skips next() replaces everything beneath it', async () => {
     const { ctx, backend } = await setup()
-    ctx.on('telemetry/redact', record => record)
+    const inner = { called: false }
+    ctx.on('telemetry/redact', () => ({ channel: 'ops', time: 0, severity: 'info', attributes: {}, body: 'replaced' } satisfies TelemetryRecord))
+    ctx.on('telemetry/redact', (_record, next) => {
+      inner.called = true
+      return next()
+    })
     const session = ctx.sessions.create(SessionId('veto'))
-    session.append('user/message', { content: [{ type: 'text', text: SECRETS.slack }], source: { kind: 'user' } }, { surfaceOp: 'append' })
-    const body = backend.records[0]!.body as { content: { text: string }[] }
-    expect(body.content[0]!.text).toBe(SECRETS.slack)
+    session.append('user/message', { content: [{ type: 'text', text: 'hi' }], source: { kind: 'user' } }, { surfaceOp: 'append' })
+    expect(backend.records[0]!.body).toBe('replaced')
+    expect(inner.called).toBe(false)
   })
 
   it('a throwing rule withholds the record fail-closed without disturbing the log', async () => {