code-runtime/

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The code-execution capability seam (see capability seams): a runtime Service Definition for executing one model-written program against host-provided async bindings, capturing what it printed and returned; replaceable providers; and the tool registry's Code Mode Consumer (tools: { mode: code } — the run_code tool and the SDK generated in the loaded runtime's language). Design is in the Code Mode Agent Note. Product packages.

Package	Role	ctx key
code-runtime/	Service Definition and shared vocabulary	ctx.codeRuntime
code-runtime-worker/	Worker-thread backend	registers ctx.codeRuntime

Providers register the service without changing its Consumer. The child READMEs own language, isolation, and execution-budget details.

The subsystem reference — run requests/results, binding namespaces, the failure taxonomy — is docs/subsystems/code-runtime.md.