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deepseek-harness/packages/subagent/subagent-spawn/README.md
Tianyi Cui b907c20213 review: drop the structured-output nudge; FIXME the context-global registry constraint
Two human review directives:

- No re-prompt. A structured child that finishes a turn cleanly without
  calling structured_output settles error to the parent immediately —
  readResult already carried that mapping; the nudge loop only delayed it.
  Deletes the loop, its cancellation-window guard, STRUCTURED_OUTPUT_NUDGE,
  and the structuredNudgeRetries Config on both backends.

- FIXME in the structured module doc: per-agent/per-session tool registry and
  prompt assembly would dissolve the final-assembly enforcement dance (the
  placeholder tool, the swap, the strip, the global-registration lifetime).
2026-07-07 09:14:48 +08:00

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# @deepseek-ai/dsh-subagent-spawn
The in-process **spawn** subagent backend: a [`SubagentProvider`](../subagent/README.md) that runs each child as a **fresh** child [`Agent`](../../core/agent) on the same cordis context (`ctx.agents`) — its own session, its own (or the parent's) model, zero inherited conversation. The cheapest transport, reusing the agent factory's quiescent [`AgentHandle`](../../core/agent) teardown.
The run mechanics live in the shared [`@deepseek-ai/dsh-subagent-inprocess`](../subagent-inprocess/README.md) driver (`startInProcessRun`); this backend just passes **no seed** (a fresh child). The [fork](../subagent-fork/README.md) backend is an independent peer over the same driver — neither knows about the other.
## What it does
`start(request)` delegates to `startInProcessRun(ctx, request, { providerName })` with no seed: a fresh child agent with the parent's `cwd`/`parentSession` lineage and (by default) the parent's model. See the [driver README](../subagent-inprocess/README.md) for the full lifecycle (depth check, one-shot drive, result read, dispose).
## Capabilities
`{ outputSchema: true, depthLimit: true, toolFilter: false }`. It constructs the child, so it enforces a recursion cap, and it supports structured output via the driver's shared [structured runtime](../subagent-inprocess/README.md) (the backend acquires it for its plugin lifetime; each structured run holds its own acquisition until it settles). Tool-scoping is deferred (the service rejects a request needing it before `start` runs).
## Config
| Key | Meaning |
|---|---|
| `providerName` | Registry name on `ctx.subagents` (default `spawn`). |