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# Conflicts: # .agents/notes/implemented/architecture/2026-07-16-explicit-turn-cancellation.i18n.yaml # .agents/notes/implemented/architecture/2026-07-16-explicit-turn-cancellation.md # .agents/notes/implemented/architecture/2026-07-16-explicit-turn-cancellation.zh.md # .agents/notes/implemented/architecture/2026-09-05-canonical-feedback-log.i18n.yaml # .agents/notes/implemented/architecture/2026-09-05-nonofficial-feedback-otel.i18n.yaml # .agents/notes/implemented/architecture/2026-09-06-embedded-stream-record-readers.i18n.yaml # .agents/notes/implemented/bug-fix/2026-09-03-normalized-unread-fs-tool-diagnostic.i18n.yaml # .agents/notes/implemented/bug-fix/2026-09-06-windows-python-console-spawn-wait.i18n.yaml # .agents/notes/implemented/feature/2026-08-26-generic-file-upload.i18n.yaml # .agents/notes/implemented/feature/2026-09-07-model-switch-notice.i18n.yaml # .agents/notes/implemented/process/2026-09-03-semantic-issue-templates-and-policy.i18n.yaml # packages/shell/bash-local/tests/executor.spec.ts # packages/subprocess/subprocess-local/README.i18n.yaml # packages/subprocess/subprocess-local/README.md # packages/subprocess/subprocess-local/README.zh.md # packages/subprocess/subprocess-local/src/spawn.ts # packages/subprocess/subprocess-local/tests/spawn.spec.ts # packages/subprocess/win32-process/package.json
description, kind
| description | kind |
|---|---|
| The subagent package group: the delegation seam, its in-process and out-of-process backends, and the model-facing delegation tools. | package-group |
subagent/ — subagent capability family
English | 中文
Summary
The subagent group is the delegation family: it lets an agent hand a task to a child agent, wait for or continue the child's work, and keep every child discoverable. One contract (ctx.subagents) serves any number of named providers, so a single composition can mix in-process children (fresh, or forked from the parent's completed history) with out-of-process children — an ACP agent, a real Codex or Claude Code installation, or a complete Harness runtime over the SDK. The model-facing tools expose delegation, adjacent-Agent messaging, and listing to agents, and a parent can always see which children exist and whether they are live or stored. This page maps the group; each package README owns its package contract.
Table of Contents
Packages
| Package | Role | ctx key |
|---|---|---|
subagent/ |
Defines the delegation service: provider registry, one-shot runs, continuable children, and discovery | ctx.subagents |
subagent-in-process-driver/ |
Provides the shared in-process run driver | — |
subagent-spawn-in-process/ |
Runs a fresh in-process child | registers on ctx.subagents |
subagent-fork-in-process/ |
Runs an in-process child seeded from the parent's completed history | registers on ctx.subagents |
subagent-acp/ |
Runs an out-of-process child over the Agent Client Protocol | registers on ctx.subagents |
subagent-codex/ |
Runs a real Codex child through the official app-server protocol | registers on ctx.subagents |
subagent-claude-code/ |
Runs a real Claude Code child through the official Agent SDK | registers on ctx.subagents |
subagent-dsh-sdk/ |
Runs an out-of-process Harness child through the TypeScript SDK | registers on ctx.subagents |
tool-subagent/ |
Exposes delegation to the model | registers on ctx.tools |
tool-subagent-control/ |
Exposes adjacent-Agent messaging, interrupt, and listing to the model | registers on ctx.tools |
Related documentation
- Subagent subsystem — the service contract, provider contract, and terminal result semantics.
- Subagent capability seam — the design record for the delegation capability family.
- Continuable subagents — durable children that accept follow-up turns.
- tool-subagent-control README — the follow-up, interrupt, and listing surface.
Dev Note
None.