Files
deepseek-harness/packages/ui/stdio-agent
Tianyi Cui b59d245c7c feat: Code Mode — the registry's mode config, the SDK codegen, and the run_code bridge
The dsh-tools half of the Code Mode RFC (its fourth, final change): the
registry gains its first config — mode: native | code | both — and OWNS how
its tools reach the model. 'code' contributes exactly one wire tool,
run_code, plus a lazy tools:sdk prompt section declaring every other tool
as a generated TypeScript API (jsonSchemaToTs: total over the defineTool
subset, unknown degradation, lexicographic byte-identical rendering);
'both' ships both representations; 'native' is byte-for-byte the old
behavior. Non-native modes fail every assembly loudly without a
typescript-language ctx.codeRuntime.

run_code's dispatch bridge: JSON-normalizes each binding argument before
dispatch (what dispatches is what the tool/code-dispatch event logs — the
append can never fail on payload shape; BigInt/circulars reject that one
call), serializes all program tool calls through a per-run queue (even
Promise.all — no concurrency-safety metadata yet), routes every sub-call
through tools/pre-execute → tools/post-execute (a deny rejects the
program-side promise), drops sub-call additionalContext (no safe outlet
mid-run; pinned), owns a run-scoped abort that follows the outer signal in
and fires on settlement (in-flight sub-dispatch aborted, queued abandoned,
queue drained before returning), and converts a failed run into
CodeRunFailedError → a structured isError carrying kind + captured logs.
tool/code-dispatch joins SessionEventMap by declaration merging (log-only;
deriveMessages ignores it).

The composed surface: the tools config forwards through agent-core and
both app packages; examples/code-agent + demo:code run the worker runtime
under mode code (keyless boot smoke + a with-key e2e proving the collapsed
[run_code] header, the dispatch events, and the file the program wrote);
two new snapshot scenarios (code-mode-turn, both-mode-turn) record the SDK
section, collapsed header, dispatch events, and result card — each its own
header-pinning class (the harness gains per-scenario config overlays and
per-class pins). Catalogs, graphs, cookbook, hooks-bridge notes, and the
RFC (moved to implemented/, restructured to decision-era headings) updated
in the same change.
2026-07-08 12:58:23 +08:00
..

@deepseek-ai/dsh-stdio-agent

The terminal stdio chat app: a Cordis app plugin that composes the providerless agent spine (@deepseek-ai/dsh-agent-core) with the front-door cluster a terminal chat needs, and a bin that boots a leaf cordis.yml.

It is the readline counterpart to @deepseek-ai/dsh-acp-agent: both consume the same spine, but each bakes in the OPPOSITE front-door cluster.

What it bakes in

A terminal chat always wants the same cluster, so the package owns it rather than trusting each leaf to re-wire it:

Plugin Why it is here
@cordisjs/plugin-logger-console the console logger — stdout is just the terminal here, so logging to it is correct (the ACP app must NOT have this)
@deepseek-ai/dsh-agent-core the spine, pre-creating a main agent from this app's model and carrying its persona
@deepseek-ai/dsh-session-persistence-jsonl durable JSONL session log under persistenceRoot
stdio-chat (in-package module) the readline UI, bound to the main agent

@cordisjs/plugin-hmr (the dev/demo edit-reload loop) is deliberately a leaf entry, NOT baked in here: it is a Loader-only, subprocess-only dev plugin — its constructor throws without node --expose-internals + a live loader, and the in-process test tier cannot even import it (so a package whose apply statically pulled it in could never carry the per-file coverage gate). Unlike the console logger, a stray hmr is not a stdout-purity footgun, so leaving it at the leaf costs no safety. The demo:echo / demo:repl leaves load it and pass --expose-internals.

The leaf cordis.yml supplies only the swappable backends — an LLM adapter (llm-deepseek for the real model, or the mock mock-llm for a demo) and a bash executor (bash-local) — hmr, plus this app's Config. The whole plugin tree a run loads is therefore: this app's cluster, the spine inside agent-core, hmr, and the two leaf backends.

Config

Key Default Routed to
model (required) the pre-created main agent's model
persona the deployment persona template (may reference {{model}}), routed to dsh-system-prompt
toolOrder explicit model-facing tool order (a name list with one '<unlisted-tools>' rest entry; absent — lexicographic; an unregistered name fails each turn at prompt assembly), routed to dsh-system-prompt
persistenceRoot ./.sessions the JSONL backend's root directory
welcome ready. the stdin-chat banner
resumeSessionId resume a persisted session id instead of starting fresh (sourced from an env var in the leaf)

The bin

dsh-stdio-agent [path-to-cordis.yml] (default ./cordis.yml) loads a gitignored .env from the cwd (DEEPSEEK_API_KEY / DEEPSEEK_BASE_URL), then drives the cordis Loader against the config and awaits the whole plugin tree before returning. Run it under node --expose-internals: the cordis Loader resolves the config's bare plugin specifiers (@deepseek-ai/dsh-*, npm packages) through its internal module loader, which is only active under that flag. The demo:echo / demo:repl scripts invoke it that way.

Example leaf cordis.yml

# A REPL agent demo: hmr + the DeepSeek adapter + local bash, then this app.
- id: hmr
  name: '@cordisjs/plugin-hmr'
  config:
    root: ['.']
- id: llm-deepseek
  name: '@deepseek-ai/dsh-llm-deepseek'
  config:
    apiKey: !!js process.env.DEEPSEEK_API_KEY
    models: [deepseek-v4-flash]
- id: bash
  name: '@deepseek-ai/dsh-bash-local'
  config:
    timeoutMs: 60000
- id: stdio-agent
  name: '@deepseek-ai/dsh-stdio-agent'
  config:
    model: deepseek-v4-flash
    persona: 'You are a coding assistant powered by the {{model}} model.'

Swap llm-deepseek for a mock-llm leaf plugin and you have the echo demo — "swap the backend, keep the app".