Files
deepseek-harness/packages/subagent/subagent-spawn/README.md
Tianyi Cui 0e0f3b2f19 review: acquire the structured runtime per run, not per backend
The Codex simplification concern plus the duplication comment on the spawn
apply, resolved by deletion: the backend-lifetime holds are gone, so the
runtime registers at the first structured run and disposes when the last
settles — a deployment that never passes outputSchema carries no always-on
global state, and there is no per-backend acquisition block left to extract.

The driver spec now drives an INLINE spawn-shaped provider over
startInProcessRun, which removes the spawn/fork devDependencies (the
test-only workspace cycle); plugin-level structured coverage moves to the
backends' own specs (capture through the shipped plugin, mid-run backend
unload, seeded fork capture). tools.md, the driver README, and both backend
READMEs describe the run-scoped lifetime; the module-graph regenerates
without the cycle edges.
2026-07-07 21:09:02 +08:00

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Markdown

# @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 [structured runtime](../subagent-inprocess/README.md) (acquired per structured run inside the driver — this backend registers nothing at apply). 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`). |