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fix(scope): close final ownership races

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Drain idle injection flushes before agent teardown, snapshot approval and subagent provider inputs, and gate subagent lifecycle events on real child readiness. Align the RFCs and generated contracts with the hardened behavior.
This commit is contained in:
Tianyi Cui
2026-07-12 00:31:46 +08:00
parent e6c7522a75
commit 3529b3c166
43 changed files with 825 additions and 261 deletions
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2
packages/subagent/subagent-fork/README.md
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@@ -1,6 +1,6 @@
# @deepseek-ai/dsh-subagent-fork
The in-process **fork** subagent backend: a [`SubagentProvider`](../subagent/README.md) that runs each child as a child [`Agent`](../../core/agent) **seeded with a prefix of the parent's session log** — so the child inherits the parent's conversation context instead of starting fresh. Shares the run driver (`startInProcessRun`) with [`dsh-subagent-spawn`](../subagent-spawn/README.md); the only difference is the seed.
The in-process **fork** subagent backend: a [`SubagentProvider`](../subagent/README.md) that runs each child as a child [`Agent`](../../core/agent) **seeded with a prefix of the parent's session log** — so the child inherits the parent's conversation context instead of starting fresh. Shares the run driver (`startInProcessRun`) with [`dsh-subagent-spawn`](../subagent-spawn/README.md); the only difference is the seed. The shared `run.started` boundary resolves only after the seeded child is published, so `subagent/start` observers see a live registry entry.
## The seed boundary (the crux)

17
packages/subagent/subagent-fork/tests/subagent-fork.spec.ts
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@@ -71,6 +71,23 @@ describe('completedTurnPrefix', () => {
})
describe('dsh-subagent-fork', () => {
it('emits subagent/start only after the seeded child is published', async () => {
const { ctx, parent } = await setup([textResponse('child answer')])
let childAtStart: ReturnType<typeof ctx.agents.get>
ctx.on('subagent/start', (info) => {
if (info.provider === 'fork') childAtStart = ctx.agents.get(info.id)
})
const run = ctx.subagents.start('fork', { prompt: [{ type: 'text', text: 'child q' }], parent })
expect(childAtStart).toBeUndefined()
await run.started
expect(childAtStart).toBe(ctx.agents.get(run.id))
expect(childAtStart?.id).toBe(run.id)
await run.result
await run.dispose()
})
it('forks an UNSEEDED (fresh) child when the parent has no completed turn', async () => {
// The parent has never completed a turn → empty prefix → the provider omits
// the seed → the child runs fresh. Exercises the `seed.length > 0` false arm.