Tianyi Cui
aacedf2700
# Conflicts: # docs/cordis-catalog/events.md # docs/core-data-structures/core.md # docs/core-data-structures/tools.md # docs/event-producer-consumer.md # docs/rfc/implemented/feature/2026-06-30-interception-seams.md # docs/tool-execution-pipeline.md # packages/core/agent-loop/src/agent.ts # packages/core/agent-loop/src/loop.ts # packages/core/agent-loop/tests/loop.spec.ts # packages/core/agent/README.md # packages/core/tools/src/index.ts # scripts/gen-doc-graphs.ts
54 lines
3.4 KiB
Markdown
54 lines
3.4 KiB
Markdown
<!-- Generated by scripts/gen-doc-graphs.ts - do not edit by hand.
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Run `pnpm run gen-doc-graphs` to regenerate. -->
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# Tool Execution Pipeline
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This graph shows where policy, hooks, sandboxing, filesystem guards, result rewriting, final-outcome observation, and UI rendering fit without changing the loop. The transformable extension points are the `tools/pre-execute`, `tools/execute`, and `tools/post-execute` waterfalls; monotonic guards and `tools/result` are the owner-enforced boundaries around them.
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```mermaid
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flowchart TD
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model["Assistant message contains tool-call block"]
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toolCall["Session event: <code>tool/call</code><br/>logged before execution"]
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presentCall["UI pending card<br/>presentCall(args)"]
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pre["<code>tools/pre-execute</code> waterfall<br/>hooks, permission, sandbox"]
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guards["Registered monotonic guards<br/>deny or abstain; identity protected"]
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denied["denied or approval refused<br/>tool body skipped"]
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approval["<code>ctx.approval</code> one-shot prompt<br/>absent or unanswerable: deny"]
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around["<code>tools/execute</code> waterfall<br/>timeout, retry, metrics (around dispatch)"]
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toolBody["Registered tool execute() body"]
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fsGate["<code>fs/write-intent</code> or <code>fs/edit-intent</code><br/>tool-fs mutations only"]
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owned["Tool-owned session events<br/><code>todo/write</code>, <code>fs/observed</code>, <code>hook/invoked</code>, <code>hook/result</code>, <code>tool/code-dispatch</code>"]
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post["<code>tools/post-execute</code> waterfall<br/>accept, block, replace, add context"]
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final["<code>tools/result</code> synchronous notification<br/>frozen authoritative outcome"]
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context["Active-batch additionalContexts FIFO<br/>context/message after recorded tool results"]
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toolResult["Session event: <code>tool/result</code><br/>single model-facing outcome"]
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allResults["Tool batch settled<br/>recorded tool/result events complete"]
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presentResult["UI completed card<br/>presentResult(args, result)"]
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model --> toolCall
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toolCall --> presentCall
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toolCall --> pre
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pre -->|allow| guards
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guards -->|allow| around
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guards -->|deny| denied
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around --> toolBody
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pre -->|deny| denied
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pre -->|ask| approval
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approval -->|allowed-once| guards
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approval -->|rejected, cancelled, unavailable| denied
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denied --> post
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toolBody --> fsGate
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fsGate --> toolBody
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toolBody --> owned
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toolBody --> around
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around --> post
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post --> final
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final --> toolResult
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toolResult --> presentResult
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toolResult --> allResults
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allResults --> context
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```
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Filesystem read-before-edit checks stay below `tool-fs` on `fs/*` events. Generic pre/post waterfalls host hooks and approval policy; `ctx.approval` resolves asks before monotonic guards, and owner policy that must not be reordered remains a registered guard. Around-dispatch concerns such as timeouts wrap `tools/execute`, while `tools/result` observes the immutable outcome after transforms, lossless-JSON validation, and outer error normalization. This lets hooks span tool families without coupling the tools to one policy service. Code Mode sends both the reserved `run_code` transport and its serialized sub-calls through the pipeline; sub-calls carry the parent token, log `tool/code-dispatch`, surface denials as binding rejections, and omit `additionalContexts` to preserve call/result adjacency.
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Maintenance mode: curated Mermaid flow; exact tool schemas and event signatures live in generated catalogs.
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