deepseek-harness/packages/sdk/python-runtime/README.md

@deepseek-ai/dsh-sdk-python-runtime

English | 中文

Private direct-config carrier for the temporarily unchanged Python SDK runtime. Its jsonrpc entry serves SDK clients over newline-delimited stdio, while an external cordis.yml composes the spine, backends, and serving plugin. This npm package exposes no public bin and is not published; the Python SDK's existing dsh-jsonrpc-agent-pkg-<platform>-<arch> single-executable runtime packages lib/packaged-bin.js from the closed deploy tree. Bare plugins resolve from that tree, while relative plugins remain configuration-relative.

Config discovery

The first non-empty channel wins: $DSH_CORDIS_CONFIG, then positional argv[2]. If neither names an existing file, the packaged entry prints one-line usage to stderr and exits 1; there is no working-directory or built-in fallback. dsh-app-boot makes plugin load failures fatal. This protocol does not use DSH_SNAPSHOT.

A config without dsh-sdk-jsonrpc-server is valid and serves nothing; the carrier does not designate a server plugin.

Exit lifecycle

stdin EOF and SIGTERM dispose the root to quiescence and exit 0; SIGINT exits 130 after the same disposal. EOF may cut off an in-flight turn as documented in the distribution Agent Note. The jsonrpc plugin owns response-before-exit protocol shutdown; both paths are idempotent and safe to race.

stdout is the protocol

stdout carries only JSON-RPC frames. The carrier and boot guards diagnose on stderr, and the config must omit stdout loggers.

Model Experience

Indirectly, through the plugins loaded from the external cordis.yml, which own every model-bound prompt, schema, message, and result; this carrier adds none of its own.

KV Cache effect

No direct invalidation; the named consumer owns any request-prefix changes.

Known Limitations and Deferred Work

• Temporary direct-config exception — this private carrier remains outside dsh --profile sdk only to preserve the current Python executable and wheel behavior; the later Python runtime migration deletes it and then renames the executable family.
• The carrier cannot prove that the config serves JSON-RPC — a valid config with no dsh-sdk-jsonrpc-server entry boots successfully and serves nothing.
• No built-in or default config exists — every launch must provide DSH_CORDIS_CONFIG or a positional path, and deployment owns the complete plugin tree and stdout discipline.
• stdin EOF cuts off in-flight work — client disappearance disposes the root immediately; callers that need orderly completion use the protocol-level shutdown request.