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# Conflicts: # docs/config-catalog.md # docs/cordis-catalog/events.md # docs/cordis-catalog/services.md # docs/core-data-structures/core.md # docs/event-producer-consumer.md # docs/persistence-catalog.md # examples/acp-agent/tests/snapshots/advanced-toolchain/session.1.jsonl # examples/acp-agent/tests/snapshots/advanced-toolchain/session.2.jsonl # examples/acp-agent/tests/snapshots/advanced-toolchain/session.jsonl # examples/acp-agent/tests/snapshots/both-mode-turn/session.jsonl # examples/acp-agent/tests/snapshots/hook-cc-pretool-ask/session.jsonl # examples/acp-agent/tests/snapshots/skill-load/session.jsonl # examples/acp-agent/tests/snapshots/text-turn/session.jsonl # examples/sandbox-acp-agent/cordis.yml # examples/sandbox-acp-agent/tests/snapshots/escalation-approved/session.jsonl # examples/sandbox-acp-agent/tests/snapshots/escalation-rejected/session.jsonl # examples/sandbox-acp-agent/tests/snapshots/mode-switching/session.jsonl # packages/compact/compact-basic/README.md # packages/compact/compact-basic/src/index.ts # packages/compact/compact-basic/tests/compact-basic.spec.ts # packages/core/agent-loop/README.md # packages/core/agent-loop/src/loop.ts # packages/core/agent-loop/tests/properties.spec.ts # packages/core/session/README.md # packages/core/session/src/types.ts # packages/core/session/tests/derived-cache.spec.ts # packages/llm/llm-deepseek/src/index.ts # packages/llm/llm-pi-ai/README.md # packages/llm/llm-pi-ai/src/adapter.ts # packages/llm/llm-pi-ai/src/convert.ts # packages/llm/llm-pi-ai/tests/adapter.spec.ts # packages/llm/llm/README.md # packages/llm/llm/src/call-config.ts # packages/llm/llm/src/index.ts # packages/ui/acp-agent/src/index.ts # packages/ui/acp/tests/harness.ts # packages/ui/jsonrpc/README.md # packages/ui/jsonrpc/src/server.ts # packages/ui/stdio-agent/README.md # packages/ui/stdio-agent/src/index.ts # python/sdk/README.i18n.yaml
38 lines
3.2 KiB
Markdown
38 lines
3.2 KiB
Markdown
# @deepseek-ai/dsh-jsonrpc
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Stdio JSON-RPC plugin for out-of-process SDK clients such as Python `deepseek_harness`. [`HarnessSdkServer`](src/server.ts) handles `initialize` → `session/prompt` → `shutdown` plus session and subagent notifications over [`JsonRpcLineTransport`](src/transport.ts). This package owns the protocol; [`jsonrpc-agent`](../jsonrpc-agent/README.md) boots the external `cordis.yml` that chooses the surrounding runtime. See the [single-executable RFC](../../../docs/rfc/implemented/architecture/2026-07-10-single-file-executable-sdk-runtime-distribution.md) for the distribution design.
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## Wiring
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`inject: ['agents']`. The server gets or creates one agent per `sessionId` from the `initialize.provider`/`initialize.model` pair and demuxes `subagent/end` through the registry. A registered owner for the provider route wins; an unowned `deepseek` route mounts `dsh-llm-deepseek` using `$DEEPSEEK_API_KEY` and `$DEEPSEEK_BASE_URL`, while any other unowned provider fails initialization. Persistence, tools, and other adapters come from the surrounding `cordis.yml`.
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## Config
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No `cordis.yml` keys. `JsonRpcConfig.input`, `output`, and `exit` are test-only runtime seams; production uses process stdio and `process.exit`.
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## stdout is the protocol
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stdout carries only JSON-RPC frames. The loading config must omit stdout loggers; diagnostics go to stderr.
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## Shutdown and exit semantics
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A `shutdown` request flushes its response, disposes the plugin fiber, then exits 0. Disposal idempotently shuts down every SDK-created agent to quiescence, detaches subscriptions, and closes the transport. Bare fiber disposal only stops serving; it does not exit. The app bin owns root disposal for stdin EOF (0), SIGTERM (0), and SIGINT (130).
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## Wire notes
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`initialize.serverInfo.name` is the wire-stable `deepseek-harness-sdk-runtime`. Each session permits one in-flight prompt; overlap fails immediately, other sessions remain independent, and the session is reusable after settlement. Persistence roots and deployment persona remain in `cordis.yml`.
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## Model Experience
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### SDK user message
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**What the model sees**: For each accepted `session/prompt`, the conversation model receives the caller-supplied `contentBlocks` verbatim as one user message in that SDK session. This package adds no system-prompt prose or tool schema; those come from the plugins in the surrounding `cordis.yml`.
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**Token effect**: Data-dependent user-message tokens enter retained session history and are resent on later turns until another package compacts them. The JSON-RPC frames, session notifications, and server bookkeeping add zero model-context tokens.
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## Known Limitations and Deferred Work
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- **The wire has no per-session close or prompt-cancel method** — SDK-created agents remain live until process shutdown, and one accepted prompt runs to agent idle before that session accepts another.
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- **stdout purity is deployment-enforced** — a surrounding config can still load a stdout logger and corrupt the JSON-RPC channel; this plugin does not inspect or veto sibling loggers.
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- **Automatic adapter mounting is DeepSeek-specific** — `initialize` can reuse any pre-registered model adapter, but its only fallback mounts `dsh-llm-deepseek`.
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