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docs: correct fs/observed concurrency-safety wording

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The read tool's isConcurrencySafe rationale called the fs/observed recorder
"commutative" and said concurrent reads "converge to one observed version",
overstating the guarantee: the WeakMap record is last-writer-wins. Safety comes
from write/edit re-checking the version in their in-lock CAS (a stale
observation only forces a later edit to fail closed with FS_STALE_VERSION), as
the RFC already states. Align the read comment, the ToolDefinition JSDoc, both
READMEs, and the regenerated catalogs.
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Dudu-0223
2026-07-14 11:56:27 +08:00
parent eae8b8ce2e
commit 5ab8f2e328
7 changed files with 18 additions and 12 deletions
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packages/core/tools/README.md
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@@ -85,7 +85,7 @@ See `defineTool`, `validateArgs`, `ToolArgsError`, `SchemaSpec`, `InferArgs`, an
`defineTool` also validates an optional `timeoutMs` at definition time when present: it must be a positive finite number, or the helper throws — the budget is attached to the produced `ToolDefinition` (for `@deepseek-ai/dsh-timeout-policy`) and never reaches the model.
`defineTool` also accepts an optional `isConcurrencySafe(args): boolean` — the per-call concurrency classifier the agent-loop scheduler reads via `executionMode`. `args` is the typed `InferArgs<S>` shape. It is soft-validated exactly like the presenters: an arg mismatch yields `false` (the conservative exclusive default), never the hard `ToolArgsError`. Declaring `true` is a contract — the tool body must not mutate parent-owned async state (`exec.agent.session.append`, `agent.inject`) during `execute`; its only ordered outputs are the returned content, `meta`, error, and `additionalContext`. The one exception is a synchronous, side-effect-only commutative recorder (the `fs/observed` version recorder is the worked example); anything richer stays exclusive. Host-only, never model-visible.
`defineTool` also accepts an optional `isConcurrencySafe(args): boolean` — the per-call concurrency classifier the agent-loop scheduler reads via `executionMode`. `args` is the typed `InferArgs<S>` shape. It is soft-validated exactly like the presenters: an arg mismatch yields `false` (the conservative exclusive default), never the hard `ToolArgsError`. Declaring `true` is a contract — the tool body must not mutate parent-owned async state (`exec.agent.session.append`, `agent.inject`) during `execute`; its only ordered outputs are the returned content, `meta`, error, and `additionalContext`. The one exception is a synchronous, side-effect-only recorder whose updates are commutative or fail closed (the `fs/observed` version recorder is the worked example: its record is last-writer-wins, and a stale observation only makes a later write/edit fail closed at its in-lock version CAS); anything richer stays exclusive. Host-only, never model-visible.
### Structured-output schema subset