7a178951d6
A description was emitted above the `async def`, where Python treats the first string as the `Tools` class docstring and every later one as a dead expression — leaving each method undocumented in the model's only source of tool semantics. Emit it as the first statement of the method body instead. Also names the known languages in the run_code flavor guard (the reachable rejection, symmetric with the SDK_RENDERERS guard) and corrects three doc claims: the code-runtime group README no longer calls the generated SDK TypeScript, the base Code Mode note states its serial dispatch in past tense, and the tools README points at the rationale the language-dispatch note actually carries.
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code-runtime/ — code-execution capability family
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The code-execution capability seam (see capability seams): an abstract runtime interface for executing one model-written program against host-provided async bindings, capturing what it printed and returned. The consumer is the tool registry's Code Mode (tools: { mode: code } — the run_code tool and the SDK generated in the loaded runtime's language); design in the Code Mode Agent Note. Product packages.
| Package | Role | ctx key |
|---|---|---|
code-runtime/ |
Abstract code-execution seam (interface + vocabulary) | ctx.codeRuntime |
code-runtime-worker/ |
Worker-thread backend: fresh worker per run, TypeScript via host-side type-strip (annotations advisory, never type-checked), port-bridged bindings, budget/heap containment | registers ctx.codeRuntime |
The interface lives at code-runtime/code-runtime/; the shipped backend at code-runtime/code-runtime-worker/. Backends differ by execution substrate (worker thread, process, container) and by source language — both readonly descriptors on the service — and register ctx.codeRuntime without touching the interface or its consumer; that split is what makes a hardened backend a drop-in later.