fix(web): narrow default search review scope

.agents/notes/implemented/feature/2026-07-31-web-default-search.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 .agents/notes/implemented/feature/2026-07-31-web-default-search.md
-2026-07-31-web-default-search.md: e3e63dbe58049579934902f465cf5599a115da54
-2026-07-31-web-default-search.zh.md: 2ad4d9d33e6c76fea4cdc15d5afdac20b0466f30
+2026-07-31-web-default-search.md: ddc047a963212cb228da67c6c33128877cacf92c
+2026-07-31-web-default-search.zh.md: 05c30b625953ccd54c127a97b646ad7db75f693b

.agents/notes/implemented/feature/2026-07-31-web-default-search.md

@@ -14,7 +14,7 @@ The harness had a complete Web capability family—provider registry, DeepSeek/E
 
 DeepSeek search uses the same `DEEPSEEK_API_KEY` credential reference as the official conversation adapter. The provider resolves that reference inside every search through the optional `ctx.credentials` service; only a composition without the seam falls back to the launching process environment, and a non-empty literal `apiKey` remains the programmatic last resort. A stored or rotated Web Models key therefore reaches the next search without restarting or retaining the value on the provider. Because `WebSearchProvider.available()` is synchronous, it treats an installed resolver as locally usable and missing dynamic credentials fail the operation with the provider-specific `WEB_PROVIDER_CREDENTIAL_MISSING` code while the stable tool schema stays registered.
 
-Search keeps its endpoint distinct from chat completions: `DEEPSEEK_SEARCH_BASE_URL` overrides the Anthropic-compatible base, while `DEEPSEEK_BASE_URL` continues to configure conversation requests. Each `web_search` performs an auxiliary DeepSeek Messages call with the native search server tool.
+Search keeps its endpoint distinct from chat completions: `DEEPSEEK_SEARCH_BASE_URL` overrides the Anthropic-compatible base, while `DEEPSEEK_BASE_URL` continues to configure conversation requests. Each `web_search` performs an auxiliary DeepSeek Messages call with the native search server tool. Immediately before dispatch, the provider appends a log-only `web/deepseek-search-llm-request` event to the initiating Agent session with the resolved endpoint, API version, and exact secret-free JSON body. Credential preflight remains provider-local and races caller cancellation; neither concern expands the generic Web or credentials seams.
 
 The default mount does not create a Web-specific permission policy. `web_search` executes outside the bash/filesystem sandbox and approval presets, following `dsh-tool-web`'s existing contract. It does not mount `web_fetch` or a local fetch provider, so the default does not grant model-selected arbitrary URL retrieval. The shipped deployment already defaults to `danger-full-access`; a future restricted-network product stance must add a `tools/pre-execute` policy or capability-specific network confinement rather than implying that filesystem access mode governs Web calls.
 
@@ -32,4 +32,4 @@ The default mount does not create a Web-specific permission policy. `web_search`
 
 ## Consequences
 
-Web/headless model requests carry only the `web_search` schema and its fixed prompt guidance in native mode; Code Mode exposes the same search capability beneath `run_code`. Search adds a complete auxiliary model call and may use the native server tool multiple times. The default offers search-result snippets and source metadata but no arbitrary page retrieval; deployments that need full-page fetch must opt in. The Web snapshot lane boots the shipped tree, drives a replayed `web_search` call through the real DeepSeek provider against a local Messages fixture, asserts the durable structured result, and pins the settled browser presentation. The real-composition smoke test pins the absence of `web_fetch`; provider tests pin missing, stored, and rotated credential behavior plus literal and ambient compatibility.
+Web/headless model requests carry only the `web_search` schema and search-only prompt guidance in native mode; Code Mode exposes the same search capability beneath `run_code`. The prompt tells the model to use returned snippets and never advertises the disabled `web_fetch` tool. Search adds a complete auxiliary model call and may use the native server tool multiple times; its exact secret-free request remains reconstructable from the initiating session log. The default offers search-result snippets and source metadata but no arbitrary page retrieval; deployments that need full-page fetch must opt in. The Web snapshot lane boots the shipped tree, drives a replayed `web_search` call through the real DeepSeek provider against a local Messages fixture, asserts the durable auxiliary request and structured result, and pins the settled browser presentation. The real-composition smoke test pins the absence of `web_fetch`; provider tests pin missing, stored, and rotated credential behavior plus literal and ambient compatibility.

.agents/notes/implemented/feature/2026-07-31-web-default-search.zh.md

@@ -14,7 +14,7 @@ Status: implemented
 
 DeepSeek 搜索使用与官方会话适配器相同的 `DEEPSEEK_API_KEY` 凭据引用。提供方在每次搜索内部通过可选的 `ctx.credentials` 服务解析该引用；只有未挂载该 seam 的组合才会回退到启动进程的环境变量，非空的 `apiKey` 字面值仍作为程序化配置的最后兜底。因此，由 Web 的 Models 页存储或轮换的密钥无需重启即可用于下一次搜索，提供方也无需保留该值。由于 `WebSearchProvider.available()` 是同步方法，它会将已安装解析器视为本地可用；若动态凭据缺失，操作会以提供方专属错误码 `WEB_PROVIDER_CREDENTIAL_MISSING` 失败，而稳定的工具 schema 仍保持注册。
 
-搜索端点与 chat completions 保持独立：`DEEPSEEK_SEARCH_BASE_URL` 覆盖 Anthropic 兼容基址，`DEEPSEEK_BASE_URL` 则继续配置会话请求。每次 `web_search` 都会发起一次辅助 DeepSeek Messages 调用，并携带原生搜索服务器工具。
+搜索端点与 chat completions 保持独立：`DEEPSEEK_SEARCH_BASE_URL` 覆盖 Anthropic 兼容基址，`DEEPSEEK_BASE_URL` 则继续配置会话请求。每次 `web_search` 都会发起一次辅助 DeepSeek Messages 调用，并携带原生搜索服务器工具。发出请求前一刻，提供方会向发起请求的 agent（智能体）会话追加仅用于日志的 LLM（大语言模型）请求事件 `web/deepseek-search-llm-request`，其中包含已解析端点、API 版本，以及不含密钥的精确 JSON 请求体。凭据预检仍留在提供方内部，并与调用方取消存在竞态；这两项关注点都不会扩展通用 Web seam 或凭据 seam。
 
 默认挂载不会创建 Web 专用权限策略。`web_search` 在 bash／文件系统沙箱及审批预设之外执行，并遵循 `dsh-tool-web` 的现有契约。组合不挂载 `web_fetch` 或本地抓取提供方，因此默认配置不会允许模型自行选择任意 URL 进行抓取。已交付部署的默认值本就是 `danger-full-access`；未来如果产品采取受限网络策略，必须添加 `tools/pre-execute` 策略或按能力限制网络访问，而不能暗示文件系统访问模式会管辖 Web 调用。
 
@@ -32,4 +32,4 @@ DeepSeek 搜索使用与官方会话适配器相同的 `DEEPSEEK_API_KEY` 凭据
 
 ## 后果
 
-Web／无头模型请求在原生模式下只会携带 `web_search` schema 及其固定提示词指引；Code Mode 通过 `run_code` 公开相同的搜索能力。搜索会增加一次完整的辅助模型调用，并可能多次使用原生服务器工具。默认配置会提供搜索结果 snippet 与来源元数据，但不支持任意页面抓取；需要抓取完整页面的部署必须自行选择启用抓取。Web 快照通道会启动已交付配置树，使用本地 Messages fixture（测试前置数据），经由真实 DeepSeek 提供方驱动一次回放的 `web_search` 调用，断言持久化的结构化结果，并固定最终浏览器呈现。真实组合冒烟测试固定了不提供 `web_fetch` 这一事实；提供方测试固定缺失、已存储及已轮换凭据的行为，以及字面值与环境变量的兼容性。
+Web／无头模型请求在原生模式下只会携带 `web_search` schema，以及仅用于搜索的提示词指引；Code Mode 通过 `run_code` 公开相同的搜索能力。该提示词要求模型使用返回的 snippet，且绝不会向模型提及已禁用的 `web_fetch` 工具。搜索会增加一次完整的辅助模型调用，并可能多次使用原生服务器工具；发起会话的日志仍可精确重建其不含密钥的请求。默认配置会提供搜索结果 snippet 与来源元数据，但不支持任意页面抓取；需要抓取完整页面的部署必须自行选择启用抓取。Web 快照通道会启动已交付配置树，使用本地 Messages fixture（测试前置数据），经由真实 DeepSeek 提供方驱动一次回放的 `web_search` 调用，断言持久化的辅助请求与结构化结果，并固定最终浏览器呈现。真实组合冒烟测试固定了不提供 `web_fetch` 这一事实；提供方测试固定缺失、已存储及已轮换凭据的行为，以及字面值与环境变量的兼容性。

apps/web/tests/web-search-round.e2e.ts

@@ -85,7 +85,8 @@ describe('web e2e: shipped default web search', () => {
   let scaffold: WebScaffold
   let browser: Browser
   let page: Page
-  let searchServer: Server
+  let searchServer: Server | undefined
+  let searchBaseURL: string
   let tripwire: ReturnType<typeof watchConsole>
   const searchRequests: CapturedSearchRequest[] = []
   const sessionEvents: SessionEvent[] = []
@@ -93,6 +94,7 @@ describe('web e2e: shipped default web search', () => {
   beforeAll(async () => {
     const search = await startSearchServer(searchRequests)
     searchServer = search.server
+    searchBaseURL = search.baseURL
     scaffold = await launchWebScaffold({
       deepSeekSearch: {
         baseURL: search.baseURL,
@@ -153,6 +155,16 @@ describe('web e2e: shipped default web search', () => {
       },
     })
 
+    const auxiliaryRequest = sessionEvents.find(
+      (event): event is Extract<SessionEvent, { type: 'web/deepseek-search-llm-request' }> =>
+        event.type === 'web/deepseek-search-llm-request',
+    )
+    expect(auxiliaryRequest?.data).toEqual({
+      endpoint: `${searchBaseURL}/messages`,
+      apiVersion: '2023-06-01',
+      body: searchRequests[0]?.body,
+    })
+
     const searchCall = sessionEvents.find(
       (event): event is Extract<SessionEvent, { type: 'tool/call' }> =>
         event.type === 'tool/call' && event.data.name === 'web_search',

docs/config-catalog.md

@@ -2174,7 +2174,7 @@ export interface Config {
 }
 ```
 
-Source: [`packages/web/web-search-deepseek/src/index.ts:41`](../packages/web/web-search-deepseek/src/index.ts)
+Source: [`packages/web/web-search-deepseek/src/index.ts:43`](../packages/web/web-search-deepseek/src/index.ts)
 
 ## `@deepseek-ai/dsh-web-search-exa`
 

docs/module-graph.md

@@ -429,9 +429,6 @@ flowchart TD
   pkg_web_fetch_local --> pkg_invariants
   pkg_web_fetch_local --> pkg_timeout
   pkg_web_fetch_local --> pkg_web
-  pkg_web_search_deepseek --> pkg_credentials
-  pkg_web_search_deepseek --> pkg_invariants
-  pkg_web_search_deepseek --> pkg_web
   pkg_web_search_exa --> pkg_invariants
   pkg_web_search_exa --> pkg_web
   pkg_web_search_perplexity --> pkg_invariants
@@ -527,6 +524,11 @@ flowchart TD
   pkg_compact_basic --> pkg_llm
   pkg_compact_basic --> pkg_session
   pkg_compact_basic --> pkg_token_meter
+  pkg_web_search_deepseek --> pkg_agent
+  pkg_web_search_deepseek --> pkg_credentials
+  pkg_web_search_deepseek --> pkg_invariants
+  pkg_web_search_deepseek --> pkg_session
+  pkg_web_search_deepseek --> pkg_web
   pkg_spill_local --> pkg_invariants
   pkg_spill_local --> pkg_spill
   pkg_hook_protocol --> pkg_bash
@@ -1096,7 +1098,6 @@ flowchart TD
 | [`compact`](../packages/compact/compact) | `compact` | [`invariants`](../packages/support/invariants), [`llm`](../packages/llm/llm), [`session`](../packages/core/session) |
 | [`compact-tool-result-prune`](../packages/compact/compact-tool-result-prune) | `compact` | [`invariants`](../packages/support/invariants), [`llm`](../packages/llm/llm), [`session`](../packages/core/session) |
 | [`web-fetch-local`](../packages/web/web-fetch-local) | `web` | [`invariants`](../packages/support/invariants), [`timeout`](../packages/util/timeout), [`web`](../packages/web/web) |
-| [`web-search-deepseek`](../packages/web/web-search-deepseek) | `web` | [`credentials`](../packages/credentials/credentials), [`invariants`](../packages/support/invariants), [`web`](../packages/web/web) |
 | [`web-search-exa`](../packages/web/web-search-exa) | `web` | [`invariants`](../packages/support/invariants), [`web`](../packages/web/web) |
 | [`web-search-perplexity`](../packages/web/web-search-perplexity) | `web` | [`invariants`](../packages/support/invariants), [`web`](../packages/web/web) |
 | [`spill`](../packages/spill/spill) | `spill` | [`brand`](../packages/util/brand), [`invariants`](../packages/support/invariants), [`llm`](../packages/llm/llm), [`session`](../packages/core/session) |
@@ -1121,6 +1122,7 @@ flowchart TD
 | [`fs-policy`](../packages/fs/fs-policy) | `fs` | [`fs`](../packages/fs/fs), [`invariants`](../packages/support/invariants) |
 | [`skill-local`](../packages/skill/skill-local) | `skill` | [`fs`](../packages/fs/fs), [`invariants`](../packages/support/invariants), [`paths`](../packages/util/paths), [`skill`](../packages/skill/skill) |
 | [`compact-basic`](../packages/compact/compact-basic) | `compact` | [`agent`](../packages/core/agent), [`compact`](../packages/compact/compact), [`compact-tool-result-prune`](../packages/compact/compact-tool-result-prune), [`invariants`](../packages/support/invariants), [`llm`](../packages/llm/llm), [`session`](../packages/core/session), [`token-meter`](../packages/llm/token-meter) |
+| [`web-search-deepseek`](../packages/web/web-search-deepseek) | `web` | [`agent`](../packages/core/agent), [`credentials`](../packages/credentials/credentials), [`invariants`](../packages/support/invariants), [`session`](../packages/core/session), [`web`](../packages/web/web) |
 | [`spill-local`](../packages/spill/spill-local) | `spill` | [`invariants`](../packages/support/invariants), [`spill`](../packages/spill/spill) |
 | [`hook-protocol`](../packages/hooks/hook-protocol) | `hooks` | [`bash`](../packages/bash/bash), [`invariants`](../packages/support/invariants), [`session`](../packages/core/session) |
 | [`session-persistence-jsonl`](../packages/session-persistence/session-persistence-jsonl) | `session-persistence` | [`invariants`](../packages/support/invariants), [`session`](../packages/core/session), [`session-persistence`](../packages/session-persistence/session-persistence) |

docs/persistence-catalog.md

@@ -641,3 +641,14 @@ Source: [`packages/core/session/src/types.ts:193`](../packages/core/session/src/
 ```
 
 Source: [`packages/core/session/src/types.ts:213`](../packages/core/session/src/types.ts)
+
+### `web/*`
+
+#### `web/deepseek-search-llm-request` — log-only
+
+```ts persistence-catalog
+/** Secret-free auxiliary DeepSeek search request recorded before dispatch. */
+'web/deepseek-search-llm-request': DeepSeekSearchLlmRequest
+```
+
+Source: [`packages/web/web-search-deepseek/src/provider.ts:83`](../packages/web/web-search-deepseek/src/provider.ts)

packages/web/tool-web/README.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 packages/web/tool-web/README.md
-README.md: 7bee0d2d30fbbcf582fd7b60eb5d9130b6bdf888
-README.zh.md: 3d708839c9ffbdd89df08678fd6997fc6c45ee07
+README.md: 12f5c806db66b2109888c1ec642d117f3432d0df
+README.zh.md: cfbf47219f160af706912ca53f85cff535c381ec

packages/web/tool-web/README.md

@@ -4,7 +4,7 @@ English | [中文](README.zh.md)
 
 The model-facing web tool suite — `web_search` and `web_fetch` — over the [web capability seam](../web/README.md) (`ctx.web`). It owns model-facing concerns only: tool names, JSON schemas, snake_case argument names, prompt sections, the result-count bound, result formatting, HTML→markdown presentation, and the UI presentation projection — `presentCall`, `presentResult` (a `card: 'web'` result card discriminated by `kind: 'search' | 'fetch'`), and the `output.presentationMeta` that carries the structured search sources or the fetch summary the lossy render text cannot (see the [web-result-card Agent Note](../../../.agents/notes/implemented/feature/2026-07-30-web-result-card.md)). All web access goes through `ctx.web`; this package never imports a concrete provider. Neither tool exposes a model-facing timeout — each tool's cooperative tool-call budget is declared here via config (`fetchTimeoutMs`/`searchTimeoutMs`, attached as `ToolDefinition.timeoutMs`) and enforced by [`@deepseek-ai/dsh-timeout-policy`](../../timeout/timeout-policy/README.md) (a `tools/execute` wrapper); each tool just forwards `exec.signal` to the seam.
 
-Each tool is registered independently; a product that wants only one disables the other via config (`{ search: false }` / `{ fetch: false }`).
+Each tool is registered independently; a product that wants only one disables the other via config (`{ search: false }` / `{ fetch: false }`). Search guidance mentions `web_fetch` only when fetch is also config-enabled; a search-only composition instead tells the model to use returned snippets and cite their URLs.
 
 ## Tools
 
@@ -47,14 +47,20 @@ The tool never calls a provider's `available()` and never enumerates providers
 
 #### What the model sees
 
-Search and fetch contribute the web-search and web-fetch guidance below. A scoped tool restriction does not remove these independently registered sections.
+Search and fetch contribute the web-search and web-fetch guidance below. Search chooses its fetch-enabled or search-only text from config at registration time. A scoped tool restriction does not remove these independently registered sections.
 
-##### Web search guidance
+##### Web search guidance with fetch enabled
 
 ```markdown
 Use the web_search tool to discover current information on the web. It returns an optional answer plus a list of source URLs. Follow up with web_fetch when you need the full content of a specific result, and cite the relevant URLs as markdown links.
 ```
 
+##### Web search-only guidance
+
+```markdown
+Use the web_search tool to discover current information on the web. It returns an optional answer plus a list of source URLs. Use the returned source snippets when available, and cite the relevant URLs as markdown links.
+```
+
 ##### Web fetch guidance
 
 ```markdown
@@ -63,11 +69,11 @@ Use the web_fetch tool to retrieve the content of a specific HTTP(S) URL (for ex
 
 #### Token effect
 
-Fixed guidance cost per request for each config-enabled tool, even when a restriction hides its schema.
+Fixed guidance cost per request for each config-enabled tool, even when a restriction hides its schema. Toggling fetch changes the search guidance as well as registering or removing the fetch section.
 
 #### KV Cache effect
 
-Prefix-stable while enabled tools, scope, and guidance text are unchanged. Config enablement or plugin lifecycle may invalidate reuse from the first changed prompt section; scoped schema restrictions do not remove it.
+Prefix-stable while enabled tools, scope, and guidance text are unchanged. Config enablement—including toggling fetch's search-guidance branch—or plugin lifecycle may invalidate reuse from the first changed prompt section; scoped schema restrictions do not remove it.
 
 ### Tool schemas
 

packages/web/tool-web/README.zh.md

@@ -4,7 +4,7 @@
 
 面向模型的 web 工具套件 `web_search` 与 `web_fetch`，构建于 [web 能力 seam](../web/README.md)（`ctx.web`）之上。它只负责面向模型的事项：工具名称、JSON Schema、snake_case 参数名称、提示词区段、结果数量上限、结果格式、HTML→markdown 呈现，以及 UI 呈现投影——`presentCall`、`presentResult`（以 `kind: 'search' | 'fetch'` 区分的 `card: 'web'` 结果卡片），以及承载有损渲染文本无法携带的结构化搜索来源或抓取摘要的 `output.presentationMeta`（见 [web-result-card Agent Note](../../../.agents/notes/implemented/feature/2026-07-30-web-result-card.md)）。所有 web 访问都通过 `ctx.web`；该包（package）绝不导入具体提供方。两个工具都不公开面向模型的超时：每个工具的协作式工具调用超时预算通过配置在此声明（`fetchTimeoutMs`／`searchTimeoutMs`，附加为 `ToolDefinition.timeoutMs`），由 [`@deepseek-ai/dsh-timeout-policy`](../../timeout/timeout-policy/README.md)（`tools/execute` 包装层）强制执行；每个工具只把 `exec.signal` 转发给 seam。
 
-每个工具独立注册；只需要其中一个工具的产品可以通过配置禁用另一个（`{ search: false }`／`{ fetch: false }`）。
+每个工具独立注册；只需要其中一个工具的产品可以通过配置禁用另一个（`{ search: false }`／`{ fetch: false }`）。仅当抓取也通过配置启用时，搜索指引才会提及 `web_fetch`；仅启用搜索的组合则会要求模型使用返回的 snippet 并引用其 URL。
 
 ## 工具
 
@@ -47,14 +47,20 @@
 
 #### 模型看到的内容
 
-搜索与抓取分别贡献以下 web-search 和 web-fetch 指引。scope 工具限制不会移除这些独立注册的区段。
+搜索与抓取分别贡献以下 web-search 和 web-fetch 指引。搜索会在注册时根据配置选用启用抓取或仅搜索的文本。scope 工具限制不会移除这些独立注册的区段。
 
-##### Web 搜索指引
+##### 启用抓取时的 Web 搜索指引
 
 ```markdown
 Use the web_search tool to discover current information on the web. It returns an optional answer plus a list of source URLs. Follow up with web_fetch when you need the full content of a specific result, and cite the relevant URLs as markdown links.
 ```
 
+##### 仅搜索时的 Web 搜索指引
+
+```markdown
+Use the web_search tool to discover current information on the web. It returns an optional answer plus a list of source URLs. Use the returned source snippets when available, and cite the relevant URLs as markdown links.
+```
+
 ##### Web 抓取指引
 
 ```markdown
@@ -63,11 +69,11 @@ Use the web_fetch tool to retrieve the content of a specific HTTP(S) URL (for ex
 
 #### Token 影响
 
-每个通过配置启用的工具都会为每次请求增加固定的指引 token 开销，即使限制隐藏了其 schema。
+每个通过配置启用的工具都会为每次请求增加固定的指引 token 开销，即使限制隐藏了其 schema。切换抓取状态不仅会注册或移除抓取区段，也会更改搜索指引。
 
 #### KV Cache 影响
 
-只要启用工具、scope 与指引文本不变，前缀就保持稳定。配置启用状态或插件生命周期可能使从第一个变化的提示词区段起的复用失效；scope schema 限制不会移除该区段。
+只要启用工具、scope 与指引文本不变，前缀就保持稳定。配置启用状态（包括因切换抓取状态而改变搜索指引分支）或插件生命周期可能使从第一个变化的提示词区段起的复用失效；scope schema 限制不会移除该区段。
 
 ### 工具 schema
 

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

@@ -84,6 +84,8 @@ export function apply(ctx: Context, config: Config): void {
   assertPositiveInteger('fetchTimeoutMs', resolved.fetchTimeoutMs)
   assertPositiveInteger('searchTimeoutMs', resolved.searchTimeoutMs)
   assertPositiveInteger('fetchMaxOutputChars', resolved.fetchMaxOutputChars)
-  if (resolved.search) applyWebSearchTool(ctx, resolved.searchMaxResults, resolved.searchTimeoutMs)
+  if (resolved.search) {
+    applyWebSearchTool(ctx, resolved.searchMaxResults, resolved.searchTimeoutMs, resolved.fetch)
+  }
   if (resolved.fetch) applyWebFetchTool(ctx, resolved.fetchTimeoutMs, resolved.fetchMaxOutputChars)
 }

packages/web/tool-web/src/search.ts

@@ -204,12 +204,21 @@ export function presentSearchResult(args: { query: string }, result: ToolResult)
  *   request's `maxResults`.
  * @param timeoutMs - the cooperative tool-call budget (ms) attached as the tool's
  *   `ToolDefinition.timeoutMs` for `@deepseek-ai/dsh-timeout-policy` to enforce.
+ * @param fetchEnabled - whether the same composition exposes `web_fetch`, which
+ *   controls whether search guidance may recommend that follow-up tool.
  */
-export function applyWebSearchTool(ctx: Context, maxResults: number, timeoutMs: number): void {
+export function applyWebSearchTool(
+  ctx: Context,
+  maxResults: number,
+  timeoutMs: number,
+  fetchEnabled: boolean,
+): void {
   ctx.systemPrompt.section({
     name: 'tool:web_search',
     order: 110,
-    text: 'Use the web_search tool to discover current information on the web. It returns an optional answer plus a list of source URLs. Follow up with web_fetch when you need the full content of a specific result, and cite the relevant URLs as markdown links.',
+    text: fetchEnabled
+      ? 'Use the web_search tool to discover current information on the web. It returns an optional answer plus a list of source URLs. Follow up with web_fetch when you need the full content of a specific result, and cite the relevant URLs as markdown links.'
+      : 'Use the web_search tool to discover current information on the web. It returns an optional answer plus a list of source URLs. Use the returned source snippets when available, and cite the relevant URLs as markdown links.',
   })
 
   ctx.tools.register(defineTool({

packages/web/tool-web/tests/tool-web.spec.ts

@@ -483,8 +483,17 @@ describe('tool-web registration', () => {
     const { fiber, ctx } = await mountTools()
     const prompt = await ctx.systemPrompt.assemble()
     const text = prompt.sections.map(s => s.text).join('\n')
-    expect(text).toContain('web_search')
-    expect(text).toContain('web_fetch')
+    expect(text).toContain('Use the web_search tool to discover current information on the web. It returns an optional answer plus a list of source URLs. Follow up with web_fetch when you need the full content of a specific result, and cite the relevant URLs as markdown links.')
+    expect(text).toContain('Use the web_fetch tool to retrieve the content of a specific HTTP(S) URL')
+    await fiber.dispose()
+  })
+
+  it('does not advertise web_fetch in search-only prompt guidance', async () => {
+    const { fiber, ctx } = await mountTools({ config: { search: true, fetch: false } })
+    const prompt = await ctx.systemPrompt.assemble()
+    const text = prompt.sections.map(s => s.text).join('\n')
+    expect(text).toContain('Use the returned source snippets when available')
+    expect(text).not.toContain('web_fetch')
     await fiber.dispose()
   })
 })

packages/web/web-search-deepseek/README.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 packages/web/web-search-deepseek/README.md
-README.md: a61b28d0c78b48a173f76fe7601a53a2eefef7f7
-README.zh.md: 1b403ecaaaa6e76a3c6be17c6a8dea27bd2c522b
+README.md: 9046934de209ed0787efa50332e5be16bfdf55c6
+README.zh.md: 94e01daba69cecd2f5c3c6680979ee5fd66d7cdd

packages/web/web-search-deepseek/README.md

@@ -4,7 +4,7 @@ English | [中文](README.zh.md)
 
 A [DeepSeek](https://deepseek.com)-backed `WebSearchProvider` for the harness [web capability seam](../web/README.md) (`ctx.web`). It calls DeepSeek's **Anthropic-compatible Messages API** (`POST {baseURL}/messages`) with the native `web_search_20250305` server tool enabled, and maps the structured `web_search_tool_result` blocks DeepSeek returns into the seam's normalized `WebSearchResult`.
 
-This is an **implementation** package: it registers a provider into `ctx.web`, resolves its credential for each search through the optional `ctx.credentials` seam, and does not register a model-facing tool. Like `@deepseek-ai/dsh-llm-deepseek`, it is a function/namespace plugin (`inject: ['web']`). The Anthropic wire shape is a provider-private detail — it does **not** make this provider depend on `ctx.llm`.
+This is an **implementation** package: it registers a provider into `ctx.web`, resolves its credential for each search through the optional `ctx.credentials` seam, records the auxiliary request in the initiating Agent session when one exists, and does not register a model-facing tool. Like `@deepseek-ai/dsh-llm-deepseek`, it is a function/namespace plugin (`inject: ['web']`). The Anthropic wire shape is a provider-private detail — it does **not** make this provider depend on `ctx.llm`.
 
 ## How it differs from a dedicated search endpoint
 
@@ -42,6 +42,10 @@ Results are deduplicated by URL because one request may surface the same page ac
 
 Provider failures become `WEB_PROVIDER_ERROR`; caller cancellation becomes `WEB_ABORTED`. HTTP redirects are rejected before the `Location` target is contacted and surface as `WEB_PROVIDER_ERROR`.
 
+## Request logging
+
+Immediately before dispatch, a search running under an initiating Agent appends the log-only `web/deepseek-search-llm-request` session event. It contains the resolved endpoint, API version, and exact secret-free JSON body sent to DeepSeek; headers and credentials are excluded. Credential failures and cancellations before dispatch create no event, while later HTTP or response failures leave the attempted request durable. Direct programmatic provider calls outside an Agent have no initiating session to log.
+
 ## Model Experience
 
 ### Auxiliary DeepSeek search request
@@ -75,7 +79,6 @@ Append-only; newly visible content follows the reusable request prefix and does
 ## Known Limitations and Deferred Work
 
 - **One search costs a full Messages model turn** — latency plus generated tokens, with up to `maxUses` server-side searches; DeepSeek exposes no dedicated retrieval endpoint.
-- **Dynamic credential availability resolves inside the operation** — the synchronous `available()` contract can establish that a resolver exists but cannot query an asynchronous credential store. A selected keyless provider therefore fails the search with `WEB_PROVIDER_CREDENTIAL_MISSING`; the stable `web_search` schema remains registered.
+- **Dynamic credential availability resolves inside the operation** — the synchronous `available()` contract can establish that a resolver exists but cannot query an asynchronous credential store. A selected keyless provider therefore fails the search with `WEB_PROVIDER_CREDENTIAL_MISSING`; the stable `web_search` schema remains registered. Caller cancellation races this preflight locally, but cannot force an arbitrary credential backend itself to stop work.
 - **Over-returned sources still cost tokens** — with no result-count knob on the wire, `maxResults` is enforced only post-hoc by seam truncation.
 - **Uncited results carry no `snippet`** — a source gains one only when a `text` block citation (`cited_text`) matches its URL.
-- **Abort classification is error-shape-based** — only a `DOMException` named `AbortError` maps to `WEB_ABORTED`; an abort carrying a custom reason (e.g. `dsh-timeout`'s `TimeoutReason`) surfaces as `WEB_PROVIDER_ERROR`.

packages/web/web-search-deepseek/README.zh.md

@@ -4,7 +4,7 @@
 
 由 [DeepSeek](https://deepseek.com) 支持的 `WebSearchProvider`，用于 harness [web 能力 seam](../web/README.md)（`ctx.web`）。它调用 DeepSeek 的 **Anthropic 兼容 Messages API**（`POST {baseURL}/messages`），启用原生 `web_search_20250305` 服务器工具，并把 DeepSeek 返回的结构化 `web_search_tool_result` 块映射为 seam 规范化的 `WebSearchResult`。
 
-这是一个**实现**包（package）：它向 `ctx.web` 注册提供方，通过可选的 `ctx.credentials` seam 为每次搜索解析凭据，且不注册面向模型的工具。与 `@deepseek-ai/dsh-llm-deepseek` 一样，它是函数／命名空间插件（`inject: ['web']`）。Anthropic 协议格式（wire format）是提供方私有细节，并**不**使该提供方依赖 `ctx.llm`。
+这是一个**实现**包（package）：它向 `ctx.web` 注册提供方，通过可选的 `ctx.credentials` seam 为每次搜索解析凭据，若存在发起请求的 agent（智能体）会话，还会在其中记录该辅助请求，且不注册面向模型的工具。与 `@deepseek-ai/dsh-llm-deepseek` 一样，它是函数／命名空间插件（`inject: ['web']`）。Anthropic 协议格式（wire format）是提供方私有细节，并**不**使该提供方依赖 `ctx.llm`。
 
 ## 与专用搜索端点的区别
 
@@ -42,6 +42,10 @@ DeepSeek 不返回该提供方可作为 `content` 信任的提供方生成答案
 
 提供方失败变为 `WEB_PROVIDER_ERROR`；调用方取消变为 `WEB_ABORTED`。HTTP 重定向会在接触 `Location` 目标前被拒绝，并以 `WEB_PROVIDER_ERROR` 呈现。
 
+## 请求日志
+
+由 agent 发起的搜索会在发出请求前一刻，向相应会话追加仅用于日志的 `web/deepseek-search-llm-request` 会话事件。其中包含已解析端点、API 版本，以及发送给 DeepSeek 且不含密钥的精确 JSON 请求体；不包含标头和凭据。发出请求前发生凭据处理失败或取消时不会创建事件；发出请求后才发生 HTTP 或响应失败时，本次请求尝试仍保留持久记录。在 agent 之外通过程序直接调用提供方时，没有发起会话可供记录。
+
 ## 模型体验
 
 ### 辅助 DeepSeek 搜索请求
@@ -75,7 +79,6 @@ DeepSeek 不返回该提供方可作为 `content` 信任的提供方生成答案
 ## 已知限制与暂缓事项
 
 - **一次搜索需要完整的 Messages 模型轮次**：会产生延迟与生成 token，并且最多执行 `maxUses` 次服务器侧搜索；DeepSeek 不公开专用检索端点。
-- **动态凭据的可用性在操作内部解析**：同步的 `available()` 契约可以确认解析器存在，但无法查询异步凭据存储。因此，选中的无密钥提供方会使搜索以 `WEB_PROVIDER_CREDENTIAL_MISSING` 失败；稳定的 `web_search` schema 仍保持注册。
+- **动态凭据的可用性在操作内部解析**：同步的 `available()` 契约可以确认解析器存在，但无法查询异步凭据存储。因此，选中的无密钥提供方会使搜索以 `WEB_PROVIDER_CREDENTIAL_MISSING` 失败；稳定的 `web_search` schema 仍保持注册。调用方取消在本地与该预检存在竞态，但无法强制任意凭据后端自行停止工作。
 - **超量返回的源仍消耗 token**：协议没有结果数量旋钮，`maxResults` 只能由 seam 在事后截断。
 - **未引用的结果没有 `snippet`**：只有 `text` 块中的引用（`cited_text`）匹配其 URL 时，源才会获得 snippet。
-- **中止分类基于错误结构**：只有 `DOMException` 且名为 `AbortError` 时才映射为 `WEB_ABORTED`；携带自定义原因的中止（例如 `dsh-timeout` 的 `TimeoutReason`）会呈现为 `WEB_PROVIDER_ERROR`。

packages/web/web-search-deepseek/package.json

@@ -27,8 +27,10 @@
   ],
   "license": "BSD-3-Clause",
   "peerDependencies": {
+    "@deepseek-ai/dsh-agent": "^0.0.1",
     "@deepseek-ai/dsh-credentials": "^0.0.1",
     "@deepseek-ai/dsh-invariants": "^0.0.1",
+    "@deepseek-ai/dsh-session": "^0.0.1",
     "@deepseek-ai/dsh-web": "^0.0.1",
     "cordis": "^4.0.0-rc.7"
   },
@@ -36,9 +38,11 @@
     "schemastery": "^3.18.0"
   },
   "devDependencies": {
+    "@deepseek-ai/dsh-agent": "workspace:^",
     "@deepseek-ai/dsh-credentials": "workspace:^",
     "@deepseek-ai/dsh-credentials-local": "workspace:^",
     "@deepseek-ai/dsh-invariants": "workspace:^",
+    "@deepseek-ai/dsh-session": "workspace:^",
     "@deepseek-ai/dsh-web": "workspace:^",
     "cordis": "^4.0.0-rc.7"
   }

packages/web/web-search-deepseek/src/index.ts

@@ -7,7 +7,9 @@
 
 import type { Context } from 'cordis'
 import z from 'schemastery'
+import type {} from '@deepseek-ai/dsh-agent'
 import { credentialRef } from '@deepseek-ai/dsh-credentials'
+import type {} from '@deepseek-ai/dsh-session'
 import type {} from '@deepseek-ai/dsh-web'
 import {
   DeepSeekSearchProvider,
@@ -27,7 +29,7 @@ export {
   DEEPSEEK_DEFAULT_MODEL,
   DEEPSEEK_PROVIDER_ID,
 } from './provider.ts'
-export type { DeepSeekSearchProviderOptions } from './provider.ts'
+export type { DeepSeekSearchLlmRequest, DeepSeekSearchProviderOptions } from './provider.ts'
 
 /** Cordis plugin name used by loader diagnostics. */
 export const name = 'web-search-deepseek'
@@ -87,5 +89,11 @@ export function apply(ctx: Context, config: Config): void {
     apiVersion: config.apiVersion ?? DEEPSEEK_DEFAULT_API_VERSION,
     maxTokens,
     maxUses,
+    recordRequest: (request) => {
+      ctx.get('agents')?.currentInitiator()?.session.append(
+        'web/deepseek-search-llm-request',
+        request,
+      )
+    },
   }))
 }

packages/web/web-search-deepseek/src/invariant.ts

@@ -15,8 +15,9 @@ export const name = 'web-search-deepseek-invariant'
 export const inject = ['invariants']
 
 /**
- * No runtime invariant: this package exposes no independent event sequence or mutable data relation
- * beyond contracts enforced at its owning seam.
+ * No runtime invariant: the package emits a pre-dispatch log event but owns no
+ * later authoritative dispatch event to relate it to. Exact envelope equality
+ * is pinned at the provider boundary instead.
  */
 const install: InvariantInstaller = () => {}
 

packages/web/web-search-deepseek/src/provider.ts

@@ -14,6 +14,7 @@ import type {
   WebSearchSource,
 } from '@deepseek-ai/dsh-web'
 import type { CredentialRef } from '@deepseek-ai/dsh-credentials'
+import type {} from '@deepseek-ai/dsh-session'
 import type {
   AnthropicError,
   AnthropicResponse,
@@ -48,6 +49,41 @@ export const DEEPSEEK_DEFAULT_MAX_USES = 5
 /** Attribution header sent on every request. Bump with the package version. */
 const USER_AGENT = 'deepseek-harness/0.0.1'
 
+/**
+ * Exact secret-free DeepSeek Messages request recorded immediately before one
+ * auxiliary search dispatch.
+ */
+export interface DeepSeekSearchLlmRequest {
+  /** Fully resolved Messages endpoint. */
+  readonly endpoint: string
+  /** `anthropic-version` header value. */
+  readonly apiVersion: string
+  /** Exact JSON body sent to the provider. */
+  readonly body: {
+    readonly model: string
+    readonly max_tokens: number
+    readonly messages: readonly [{
+      readonly role: 'user'
+      readonly content: readonly [{
+        readonly type: 'text'
+        readonly text: string
+      }]
+    }]
+    readonly tools: readonly [{
+      readonly type: 'web_search_20250305'
+      readonly name: 'web_search'
+      readonly max_uses: number
+    }]
+  }
+}
+
+declare module '@deepseek-ai/dsh-session' {
+  interface SessionEventMap {
+    /** Secret-free auxiliary DeepSeek search request recorded before dispatch. */
+    'web/deepseek-search-llm-request': DeepSeekSearchLlmRequest
+  }
+}
+
 /** Resolved provider options (the plugin's `apply` supplies credential and constant defaults). */
 export interface DeepSeekSearchProviderOptions {
   /** Literal DeepSeek API key; when present it wins over {@link resolveApiKey}. */
@@ -66,6 +102,11 @@ export interface DeepSeekSearchProviderOptions {
   maxTokens: number
   /** Maximum `web_search` server-tool uses per request. */
   maxUses: number
+  /**
+   * Record the exact secret-free request immediately before dispatch. A throw
+   * prevents dispatch so model-visible auxiliary input cannot escape logging.
+   */
+  recordRequest?: (request: DeepSeekSearchLlmRequest) => void
 }
 
 /**
@@ -146,10 +187,27 @@ export class DeepSeekSearchProvider implements WebSearchProvider {
   }
 
   async search(request: WebSearchRequest, signal?: AbortSignal): Promise<WebSearchResult> {
-    const apiKey = await this.apiKey()
+    const apiKey = await this.apiKey(signal)
+    throwIfSearchAborted(signal)
+    const endpoint = `${this.options.baseURL}/messages`
+    const body: DeepSeekSearchLlmRequest['body'] = {
+      model: this.options.model,
+      max_tokens: this.options.maxTokens,
+      messages: [{
+        role: 'user',
+        content: [{ type: 'text', text: `Perform a web search for the query: ${request.query}` }],
+      }],
+      tools: [{ type: 'web_search_20250305', name: 'web_search', max_uses: this.options.maxUses }],
+    }
+    this.options.recordRequest?.({
+      endpoint,
+      apiVersion: this.options.apiVersion,
+      body,
+    })
+    throwIfSearchAborted(signal)
     let response: Response
     try {
-      response = await fetch(`${this.options.baseURL}/messages`, {
+      response = await fetch(endpoint, {
         method: 'POST',
         redirect: 'error',
         headers: {
@@ -162,19 +220,11 @@ export class DeepSeekSearchProvider implements WebSearchProvider {
           'accept': 'application/json',
           'user-agent': USER_AGENT,
         },
-        body: JSON.stringify({
-          model: this.options.model,
-          max_tokens: this.options.maxTokens,
-          messages: [{
-            role: 'user',
-            content: [{ type: 'text', text: `Perform a web search for the query: ${request.query}` }],
-          }],
-          tools: [{ type: 'web_search_20250305', name: 'web_search', max_uses: this.options.maxUses }],
-        }),
+        body: JSON.stringify(body),
         ...signal !== undefined ? { signal } : {},
       })
     } catch (error: unknown) {
-      if (isAbortError(error)) throw new WebError('DeepSeek search aborted', 'WEB_ABORTED', { cause: error })
+      if (signal?.aborted === true || isAbortError(error)) throw searchAborted(signal, error)
       throw new WebError(`DeepSeek search request failed: ${String(error)}`, 'WEB_PROVIDER_ERROR', { cause: error })
     }
 
@@ -189,7 +239,7 @@ export class DeepSeekSearchProvider implements WebSearchProvider {
         // An abort fired mid-body must surface as WEB_ABORTED, not be swallowed
         // into a generic HTTP-error message — cancellation is not a provider
         // error (the seam's cancellation contract).
-        if (isAbortError(error)) throw new WebError('DeepSeek search aborted', 'WEB_ABORTED', { cause: error })
+        if (signal?.aborted === true || isAbortError(error)) throw searchAborted(signal, error)
         // Otherwise: the HTTP status is already captured in `message` above; a
         // malformed/non-JSON error body (normal for gateway 5xx/429s) can only
         // cost a richer provider message, never the real error.
@@ -201,19 +251,21 @@ export class DeepSeekSearchProvider implements WebSearchProvider {
       const payload = await response.json() as AnthropicResponse
       return mapAnthropicResponse(payload)
     } catch (error: unknown) {
-      if (isAbortError(error)) throw new WebError('DeepSeek search aborted', 'WEB_ABORTED', { cause: error })
+      if (signal?.aborted === true || isAbortError(error)) throw searchAborted(signal, error)
       if (error instanceof WebError) throw error
       throw new WebError(`DeepSeek returned an unprocessable response body: ${String(error)}`, 'WEB_PROVIDER_ERROR', { cause: error })
     }
   }
 
   /** Resolve one operation's credential without retaining it on the provider. */
-  private async apiKey(): Promise<string> {
+  private async apiKey(signal?: AbortSignal): Promise<string> {
+    throwIfSearchAborted(signal)
     if (this.options.apiKey !== undefined && this.options.apiKey.length > 0) return this.options.apiKey
     let resolved: string | undefined
     try {
-      resolved = await this.options.resolveApiKey?.()
+      resolved = await abortable(this.options.resolveApiKey?.() ?? Promise.resolve(undefined), signal)
     } catch (error: unknown) {
+      if (signal?.aborted === true || isAbortError(error)) throw searchAborted(signal, error)
       throw new WebError(
         `DeepSeek search credential resolution failed: ${String(error)}`,
         'WEB_PROVIDER_ERROR',
@@ -231,6 +283,42 @@ export class DeepSeekSearchProvider implements WebSearchProvider {
   }
 }
 
+/**
+ * Race a same-process asynchronous preflight against caller cancellation. The
+ * attached settlement handlers keep observing an uncooperative operation after
+ * abort so a later rejection cannot become unhandled.
+ */
+function abortable<T>(operation: Promise<T>, signal?: AbortSignal): Promise<T> {
+  if (signal === undefined) return operation
+  if (signal.aborted) return Promise.reject(searchAborted(signal))
+  return new Promise<T>((resolve, reject) => {
+    const onAbort = (): void => { reject(searchAborted(signal)) }
+    signal.addEventListener('abort', onAbort, { once: true })
+    void operation.then(
+      (value) => {
+        signal.removeEventListener('abort', onAbort)
+        resolve(value)
+      },
+      (error: unknown) => {
+        signal.removeEventListener('abort', onAbort)
+        reject(new Error(String(error).replace(/^Error: /u, ''), { cause: error }))
+      },
+    )
+  })
+}
+
+/** Throw the provider's stable cancellation error when the caller already aborted. */
+function throwIfSearchAborted(signal?: AbortSignal): void {
+  if (signal?.aborted === true) throw searchAborted(signal)
+}
+
+/** Build the provider's stable cancellation error while retaining the caller's reason. */
+function searchAborted(signal?: AbortSignal, fallback?: unknown): WebError {
+  return new WebError('DeepSeek search aborted', 'WEB_ABORTED', {
+    cause: signal?.aborted === true ? signal.reason : fallback,
+  })
+}
+
 /** True for a fetch/`AbortSignal` abort, surfaced as `WEB_ABORTED`. */
 function isAbortError(error: unknown): boolean {
   return error instanceof DOMException && error.name === 'AbortError'

packages/web/web-search-deepseek/tests/deepseek.spec.ts

@@ -161,10 +161,11 @@ describe('DeepSeekSearchProvider availability', () => {
 })
 
 describe('DeepSeekSearchProvider request mapping', () => {
-  it('posts an Anthropic Messages request enabling the web_search server tool', async () => {
+  it('records and posts the same Anthropic Messages request with the web_search server tool', async () => {
     const fetchMock = vi.fn(async () => jsonResponse(searchResponse()))
+    const recordRequest = vi.fn()
     vi.stubGlobal('fetch', fetchMock)
-    await new DeepSeekSearchProvider(options).search({ query: 'hello' })
+    await new DeepSeekSearchProvider({ ...options, recordRequest }).search({ query: 'hello' })
     const [url, init] = fetchMock.mock.calls[0] as unknown as [string, RequestInit]
     expect(url).toBe('https://api.deepseek.test/anthropic/v1/messages')
     expect(init).toMatchObject({ method: 'POST', redirect: 'error' })
@@ -172,12 +173,20 @@ describe('DeepSeekSearchProvider request mapping', () => {
     expect(headers['x-api-key']).toBe('ds-key')
     expect(headers['authorization']).toBe('Bearer ds-key')
     expect(headers['anthropic-version']).toBe('2023-06-01')
-    expect(JSON.parse(init.body as string)).toEqual({
+    const body = {
       model: 'deepseek-chat',
       max_tokens: 4096,
       messages: [{ role: 'user', content: [{ type: 'text', text: 'Perform a web search for the query: hello' }] }],
       tools: [{ type: 'web_search_20250305', name: 'web_search', max_uses: 5 }],
+    }
+    expect(JSON.parse(init.body as string)).toEqual(body)
+    expect(recordRequest).toHaveBeenCalledOnce()
+    expect(recordRequest).toHaveBeenCalledWith({
+      endpoint: url,
+      apiVersion: '2023-06-01',
+      body,
     })
+    expect(recordRequest.mock.invocationCallOrder[0]).toBeLessThan(fetchMock.mock.invocationCallOrder[0] ?? 0)
   })
 
   it('forwards the abort signal', async () => {
@@ -191,6 +200,91 @@ describe('DeepSeekSearchProvider request mapping', () => {
 })
 
 describe('DeepSeekSearchProvider error handling', () => {
+  it('does not start credential resolution or dispatch for a pre-aborted call', async () => {
+    const resolveApiKey = vi.fn(async () => 'late-key')
+    const recordRequest = vi.fn()
+    const fetchMock = vi.fn()
+    vi.stubGlobal('fetch', fetchMock)
+    const controller = new AbortController()
+    controller.abort(new Error('caller stopped'))
+    await expect(new DeepSeekSearchProvider({
+      ...options,
+      apiKey: '',
+      resolveApiKey,
+      recordRequest,
+    }).search({ query: 'q' }, controller.signal))
+      .rejects.toThrow(expect.objectContaining({ code: 'WEB_ABORTED' }))
+    expect(resolveApiKey).not.toHaveBeenCalled()
+    expect(recordRequest).not.toHaveBeenCalled()
+    expect(fetchMock).not.toHaveBeenCalled()
+  })
+
+  it('aborts while an uncooperative credential resolver remains pending', async () => {
+    const resolveApiKey = vi.fn(() => new Promise<string>(() => {}))
+    const recordRequest = vi.fn()
+    const fetchMock = vi.fn()
+    vi.stubGlobal('fetch', fetchMock)
+    const controller = new AbortController()
+    const search = new DeepSeekSearchProvider({
+      ...options,
+      apiKey: '',
+      resolveApiKey,
+      recordRequest,
+    }).search({ query: 'q' }, controller.signal)
+    controller.abort(new Error('deadline'))
+    await expect(search).rejects.toThrow(expect.objectContaining({ code: 'WEB_ABORTED' }))
+    expect(resolveApiKey).toHaveBeenCalledOnce()
+    expect(recordRequest).not.toHaveBeenCalled()
+    expect(fetchMock).not.toHaveBeenCalled()
+  })
+
+  it('resolves credentials under an active cancellation signal', async () => {
+    const fetchMock = vi.fn(async () => jsonResponse(searchResponse()))
+    vi.stubGlobal('fetch', fetchMock)
+    const controller = new AbortController()
+    await expect(new DeepSeekSearchProvider({
+      ...options,
+      apiKey: '',
+      resolveApiKey: async () => 'resolved-key',
+    }).search({ query: 'q' }, controller.signal)).resolves.toMatchObject({ truncated: false })
+    const [, init] = fetchMock.mock.calls[0] as unknown as [string, RequestInit]
+    expect((init.headers as Record<string, string>)['x-api-key']).toBe('resolved-key')
+  })
+
+  it('maps a credential resolver rejection under an active signal to WEB_PROVIDER_ERROR', async () => {
+    const controller = new AbortController()
+    await expect(new DeepSeekSearchProvider({
+      ...options,
+      apiKey: '',
+      resolveApiKey: () => Promise.reject(new Error('credential backend failed')),
+    }).search({ query: 'q' }, controller.signal))
+      .rejects.toThrow(expect.objectContaining({
+        code: 'WEB_PROVIDER_ERROR',
+        message: 'DeepSeek search credential resolution failed: Error: credential backend failed',
+      }))
+  })
+
+  it('uses the default credential reference when no resolver is configured', async () => {
+    await expect(new DeepSeekSearchProvider({ ...options, apiKey: '' }).search({ query: 'q' }))
+      .rejects.toThrow('DeepSeek search has no API key for "DEEPSEEK_API_KEY"')
+  })
+
+  it('observes cancellation triggered synchronously by credential resolution', async () => {
+    const controller = new AbortController()
+    const fetchMock = vi.fn()
+    vi.stubGlobal('fetch', fetchMock)
+    await expect(new DeepSeekSearchProvider({
+      ...options,
+      apiKey: '',
+      resolveApiKey: () => {
+        controller.abort(new Error('resolver cancelled caller'))
+        return Promise.resolve('unused-key')
+      },
+    }).search({ query: 'q' }, controller.signal))
+      .rejects.toThrow(expect.objectContaining({ code: 'WEB_ABORTED' }))
+    expect(fetchMock).not.toHaveBeenCalled()
+  })
+
   it('maps an HTTP error to WEB_PROVIDER_ERROR with the provider message', async () => {
     vi.stubGlobal('fetch', vi.fn(async () => jsonResponse({ error: { message: 'rate limited' } }, { status: 429 })))
     await expect(new DeepSeekSearchProvider(options).search({ query: 'q' }))
@@ -221,6 +315,17 @@ describe('DeepSeekSearchProvider error handling', () => {
       .rejects.toThrow(expect.objectContaining({ code: 'WEB_ABORTED' }))
   })
 
+  it('maps a custom abort reason to WEB_ABORTED', async () => {
+    const controller = new AbortController()
+    vi.stubGlobal('fetch', vi.fn(async (_input: RequestInfo | URL, init?: RequestInit) =>
+      await new Promise<Response>((_resolve, reject) => {
+        init?.signal?.addEventListener('abort', () => { reject(new Error('custom abort reason')) }, { once: true })
+      })))
+    const search = new DeepSeekSearchProvider(options).search({ query: 'q' }, controller.signal)
+    controller.abort(new Error('timeout reason'))
+    await expect(search).rejects.toThrow(expect.objectContaining({ code: 'WEB_ABORTED' }))
+  })
+
   it('maps an unparseable success body to WEB_PROVIDER_ERROR', async () => {
     vi.stubGlobal('fetch', vi.fn(async () => new Response('not json', { status: 200 })))
     await expect(new DeepSeekSearchProvider(options).search({ query: 'q' }))

packages/web/web-search-deepseek/tsconfig.json

@@ -20,6 +20,12 @@
     {
       "path": "../web"
     },
+    {
+      "path": "../../core/agent"
+    },
+    {
+      "path": "../../core/session"
+    },
     {
       "path": "../../credentials/credentials"
     },

pnpm-lock.yaml

@@ -5758,6 +5758,9 @@ importers:
         specifier: ^3.18.0
         version: 3.18.0
     devDependencies:
+      '@deepseek-ai/dsh-agent':
+        specifier: workspace:^
+        version: link:../../core/agent
       '@deepseek-ai/dsh-credentials':
         specifier: workspace:^
         version: link:../../credentials/credentials
@@ -5767,6 +5770,9 @@ importers:
       '@deepseek-ai/dsh-invariants':
         specifier: workspace:^
         version: link:../../support/invariants
+      '@deepseek-ai/dsh-session':
+        specifier: workspace:^
+        version: link:../../core/session
       '@deepseek-ai/dsh-web':
         specifier: workspace:^
         version: link:../web