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Structured output on the subagent seam: schema subset, capture runtime, spawn/fork support

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Carved out of #170 per review feedback — the foundation the workflow tool
builds on, now standing alone on master:

- dsh-tools: the structured-output JSON Schema subset (StructuredOutputSchema,
  assertSupportedOutputSchema, validateStructuredValue) — rejects loud outside
  the enforced subset, listing every violation
- dsh-subagent: SubagentStartRequest.outputSchema / SubagentResult.structured
  become a real capability; the service rejects a schema'd request whose
  provider lacks it
- dsh-subagent-inprocess: the shared structured runtime — one global
  structured_output capture tool, a prepend final-assembly listener that
  strips the placeholder for plain agents and swaps in the run's own schema
  (plus the calling instruction as a trailing section) for structured
  children, an agent/turn-continuation veto once captured, and the
  capture/nudge loop in the run driver (structuredNudgeRetries, cancellation
  honored mid-nudge); lifetime refcounted by backends and live runs
- subagent-spawn / subagent-fork flip outputSchema: true

One deliberate divergence from the #170 revision: the backends do NOT add
'tools' to their plugin inject. Doing so deferred their apply past the todo
plugin, and the delegation tool mirrors provider lifecycle — so the
model-visible tool order of every existing prompt changed, invalidating every
recorded snapshot fixture. The runtime now gates its capture-tool registration
on tools availability itself (sync when live, a scoped inject fiber when the
Loader starts the backend first), keeping this PR byte-invisible to existing
transcripts: all 35 snapshot scenarios pass against master's fixtures
unchanged.
This commit is contained in:
Tianyi Cui
2026-07-06 23:29:08 +08:00
parent 0606cd559c
commit 74502fa8c2
28 changed files with 1570 additions and 62 deletions
Download Patch File Download Diff File Expand all files Collapse all files
packages/subagent/subagent-inprocess/tests/subagent-inprocess.spec.ts
+3 -3
View File
@@ -51,7 +51,7 @@ describe('depthOf', () => {
describe('startInProcessRun', () => {
it('drives a fresh child (no seed) to completion and returns its output', async () => {
const { ctx, parent } = await setup([textResponse('driver child answer')])
const run = startInProcessRun(ctx, { prompt: [{ type: 'text', text: 'do X' }], parent }, { providerName: 'spawn' })
const run = startInProcessRun(ctx, { prompt: [{ type: 'text', text: 'do X' }], parent }, { providerName: 'spawn', structuredNudgeRetries: 1 })
const result = await run.result
expect(result.stopReason).toBe('completed')
expect(text(result.output)).toBe('driver child answer')
@@ -61,7 +61,7 @@ describe('startInProcessRun', () => {
it('throws SubagentDepthError when the child would exceed maxDepth', async () => {
const { ctx, parent } = await setup([])
expect(() => startInProcessRun(ctx, { prompt: [{ type: 'text', text: 'p' }], parent, maxDepth: 0 }, { providerName: 'spawn' }))
expect(() => startInProcessRun(ctx, { prompt: [{ type: 'text', text: 'p' }], parent, maxDepth: 0 }, { providerName: 'spawn', structuredNudgeRetries: 1 }))
.toThrow(SubagentDepthError)
})
@@ -73,7 +73,7 @@ describe('startInProcessRun', () => {
parent.send([{ type: 'text', text: 'parent q' }])
await parent.whenIdle()
const seed = parent.session.events.slice()
const run = startInProcessRun(ctx, { prompt: [{ type: 'text', text: 'child q' }], parent }, { providerName: 'fork', seed })
const run = startInProcessRun(ctx, { prompt: [{ type: 'text', text: 'child q' }], parent }, { providerName: 'fork', structuredNudgeRetries: 1, seed })
const result = await run.result
expect(result.stopReason).toBe('completed')
expect(text(result.output)).toBe('seeded child reply')