Files
deepseek-harness/packages/code-runtime
Chinesezjc e0e1aa307d fix(code-runtime-python): bind encode/write for send_done and correct stray-flush retention
Addresses the follow-up review findings on the settlement-path fixes:
- send_done now routes both the pre-encoded VALUE frame and the dict ERROR
  frame through a bound _encode_json_plain + bound write_encoded, never through
  channel.send_sync (whose body re-resolves self.write_encoded and the module
  _encode_json_plain at call time) — a program rebinding ProtocolChannel.
  write_encoded or __main__._encode_json_plain no longer skips the done frame.
- flushStray retention re-accrues the withheld multibyte tail from a FRESH
  utf8 state (previously metering the carried lead against the post-flush
  expected>0 state charged it as an illegal continuation), and skips admitting
  when the whole residual drained into the retained tail so no bogus empty
  entry is pushed.
2026-08-31 14:33:31 +08:00
..

description, kind
description kind
Package map for the code-execution capability family: what program execution does for you, and which package owns each part. package-group

code-runtime/ — code-execution capability family

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Summary

The code-runtime/ group provides program execution: a model writes one program that calls host-provided functions as ordinary async calls, and a runtime executes it in isolation and returns only what the program printed and returned. One package defines the shared capability (ctx.codeRuntime), a second executes TypeScript programs in a fresh Node worker thread, and a third owns the wire protocol between a Node host and a CPython subprocess for the Python backend. Every run is independent — no state carries from one program to the next — and failures come back as part of the result, so the caller can see why a program failed and feed that back to the model.

Table of Contents


Packages

These three packages together provide program execution; each README describes what its part does.

Package Role ctx key
code-runtime/ Defines what a code runtime does: run one program against host-provided bindings and report what it printed and returned ctx.codeRuntime
code-runtime-worker-thread/ Executes TypeScript programs, each in a fresh Node worker thread registers ctx.codeRuntime
code-runtime-python/ Owns the fd-3 wire protocol between a Node host and a CPython subprocess, the Python backend's protocol layer

Start with the subsystem reference for the service contract, then the PTC mode design that consumes this capability and the capability-seam model it follows.

Dev Note

Working context for maintainers — click to expand

None.