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https://github.com/deepseek-ai/deepseek-harness
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# Conflicts: # apps/cli/cordis.yml # apps/web/tests/snapshots/code-mode-round/session.jsonl # apps/web/tests/snapshots/cordis-tool-round/session.jsonl # apps/web/tests/snapshots/fresh-round-trip/session.jsonl # apps/web/tests/snapshots/lifecycle-chrome/session.jsonl # apps/web/tests/snapshots/live-interactions/session.jsonl # apps/web/tests/snapshots/navigation-panes/seed.jsonl # apps/web/tests/snapshots/question-composer/session.jsonl # apps/web/tests/snapshots/seeded-history/seed.jsonl # apps/web/tests/snapshots/steering/session.jsonl # docs/cordis-catalog/events.md # docs/cordis-catalog/services.md # docs/core-data-structures/core.i18n.yaml # docs/core-data-structures/settings.i18n.yaml # docs/event-producer-consumer.md # docs/module-graph.md # examples/acp-agent/tests/snapshots/workspace-context/session.jsonl # packages/client/connection/README.i18n.yaml # packages/client/connection/src/index.ts # packages/client/connection/tests/node-half.spec.ts # packages/client/runtime/README.i18n.yaml # packages/client/runtime/README.md # packages/client/runtime/README.zh.md # packages/client/runtime/src/client/index.ts # packages/client/runtime/tests/fake-api.ts # packages/client/ui-models/README.i18n.yaml # packages/examples/tui-demo/README.i18n.yaml # packages/host/apiproxy/README.i18n.yaml # packages/host/apiproxy/package.json # packages/host/apiproxy/src/api-proxy.ts # packages/host/apiproxy/src/api/rpc.schema.ts # packages/host/apiproxy/src/api/rpc.ts # packages/llm/llm-deepseek/README.i18n.yaml # packages/llm/llm-deepseek/README.zh.md # packages/llm/llm-pi-ai/README.i18n.yaml # packages/llm/llm/README.i18n.yaml # packages/llm/llm/README.zh.md # packages/sdk/sdk-client/README.i18n.yaml # packages/settings/settings/README.i18n.yaml # packages/settings/settings/README.md # packages/settings/settings/README.zh.md # packages/subagent/subagent-dsh-sdk/README.i18n.yaml # packages/subagent/subagent-dsh-sdk/README.zh.md # packages/support/llm-replay/README.i18n.yaml # packages/ui/jsonrpc/README.i18n.yaml # packages/ui/jsonrpc/README.zh.md # packages/ui/tui/tests/snapshots/model-selector.expected.txt # packages/ui/tui/tests/snapshots/model-switching.expected.txt # packages/ui/tui/tests/snapshots/resume-sessions.expected.txt # packages/ui/tui/tests/snapshots/status-diagnostics-narrow.expected.txt # packages/ui/tui/tests/snapshots/status-diagnostics.expected.txt # packages/ui/tui/tests/tui.snapshot.ts # pnpm-lock.yaml # python/sdk/README.i18n.yaml # scripts/snapshots/translation-prompt-v4/request-response.expected.json
subagent/ — subagent capability family
English | 中文
The subagent seam: an agent delegating work to a child agent. Like the bash and llm families this is a capability seam (see capability seams) — but with one defining difference: multiple provider implementations coexist in one context, registered by name, rather than the single-implementation bash shape. The registry mirrors the LLM adapter registry.
| Package | Role | ctx key |
|---|---|---|
subagent/ |
Abstract subagent seam: named-provider registry + vocabulary | ctx.subagents |
subagent-inprocess/ |
Shared in-process run driver (no provider; one cleanup effect per run) | — |
subagent-spawn/ |
In-process backend: a fresh child agent | (registers on ctx.subagents) |
subagent-fork/ |
In-process backend: a child seeded with the parent's completed-turn prefix | (registers on ctx.subagents) |
subagent-acp/ |
Out-of-process backend: a child agent in a spawned subprocess, driven over ACP | (registers on ctx.subagents) |
subagent-dsh-sdk/ |
Out-of-process backend: a child harness runtime in a spawned subprocess, driven over stdio JSON-RPC through the TypeScript SDK client | (registers on ctx.subagents) |
tool-subagent/ |
Model-facing subagent delegation tool over ctx.subagents |
(registers on ctx.tools) |
The interface lives at subagent/subagent/. The in-process subagent-spawn / subagent-fork backends share the subagent-inprocess driver (a library with no provider of its own — both depend on it, neither on the other), and the out-of-process subagent-acp / subagent-dsh-sdk backends spawn their children through the subprocess/ seam (the shared credential scrub, tree-scoped teardown, and dispose ladder). Tests replace only the child boundary with package-local fixtures.
The proposal and design rationale: .agents/notes/implemented/feature/2026-06-21-subagent-capability-seam.md.