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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.
486 lines
23 KiB
TypeScript
486 lines
23 KiB
TypeScript
import { describe, expect, it } from 'vitest'
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import { Context } from 'cordis'
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import LlmService, { type GenerateOptions } from '@deepseek-ai/dsh-llm'
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import SessionStore from '@deepseek-ai/dsh-session'
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import SystemPrompt from '@deepseek-ai/dsh-system-prompt'
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import ToolRegistry from '@deepseek-ai/dsh-tools'
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import AgentRegistry, { AgentId } from '@deepseek-ai/dsh-agent'
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import type { Agent, ContinuationDecision } from '@deepseek-ai/dsh-agent'
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import AgentLoop from '@deepseek-ai/dsh-agent-loop'
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import * as Invariants from '@deepseek-ai/dsh-invariants'
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import SubagentService, { type SubagentStartRequest } from '@deepseek-ai/dsh-subagent'
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import type { StructuredOutputSchema } from '@deepseek-ai/dsh-tools'
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import { MockAdapter, textResponse, toolCallResponse } from '../../../core/agent-loop/tests/mock-adapter.ts'
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import * as spawn from '@deepseek-ai/dsh-subagent-spawn'
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import * as fork from '@deepseek-ai/dsh-subagent-fork'
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import {
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acquireStructuredRuntime,
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STRUCTURED_OUTPUT_INSTRUCTION,
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STRUCTURED_OUTPUT_TOOL,
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} from '../src/structured.ts'
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type Script = ConstructorParameters<typeof MockAdapter>[0]
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const SCHEMA: StructuredOutputSchema = {
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type: 'object',
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properties: { answer: { type: 'number' }, note: { type: 'string' } },
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required: ['answer'],
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}
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/**
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* Real loop + scripted mock model + the REAL spawn backend (which acquires the
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* structured runtime at apply, exactly as shipped). The mock model script
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* drives the child's structured_output calls.
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*/
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async function setup(script: Script, options?: { nudges?: number; withFork?: boolean }) {
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const ctx = new Context()
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const adapter = new MockAdapter(script)
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await ctx.plugin(LlmService)
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await ctx.plugin(SessionStore)
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await ctx.plugin(SystemPrompt)
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await ctx.plugin(ToolRegistry)
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await ctx.plugin(AgentRegistry)
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await ctx.plugin(Invariants)
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await ctx.plugin(AgentLoop, { agents: [] })
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await ctx.plugin(SubagentService)
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const fiber = await ctx.plugin(spawn, { providerName: 'spawn', structuredNudgeRetries: options?.nudges ?? 1 })
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const forkFiber = options?.withFork
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? await ctx.plugin(fork, { providerName: 'fork', structuredNudgeRetries: options?.nudges ?? 1 })
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: undefined
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ctx.llm.registerAdapter(['mock'], adapter)
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const parent = ctx.agentLoop.create(AgentId('parent'), { model: 'mock' })
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return { ctx, parent, adapter, fiber, forkFiber }
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}
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function structuredRequest(parent: SubagentStartRequest['parent'], extra?: Partial<SubagentStartRequest>): SubagentStartRequest {
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return { prompt: [{ type: 'text', text: 'produce the answer' }], parent, outputSchema: SCHEMA, ...extra }
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}
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/** The tool names of one recorded model request. */
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function toolNames(request: GenerateOptions): string[] {
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return (request.tools ?? []).map(tool => tool.name)
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}
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describe('in-process structured output', () => {
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it('captures a valid structured_output call and surfaces result.structured', async () => {
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const { ctx, parent } = await setup([
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toolCallResponse('c1', STRUCTURED_OUTPUT_TOOL, { answer: 42, note: 'done' }),
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])
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const run = ctx.subagents.start('spawn', structuredRequest(parent))
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const result = await run.result
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expect(result.stopReason).toBe('completed')
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expect(result.structured).toEqual({ answer: 42, note: 'done' })
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await run.dispose()
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})
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it('stops the turn after a successful capture — no extra model step is spent', async () => {
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const { ctx, parent, adapter } = await setup([
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toolCallResponse('c1', STRUCTURED_OUTPUT_TOOL, { answer: 1 }),
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textResponse('MUST NOT BE CONSUMED'),
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])
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const run = ctx.subagents.start('spawn', structuredRequest(parent))
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await run.result
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// Default continuation would run a second step after the tool call; the
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// structured runtime's turn-continuation veto stops the turn instead.
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expect(adapter.requests.length).toBe(1)
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await run.dispose()
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})
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it('the captured-turn veto is prepend: an EARLIER force-continue listener cannot short-circuit it', async () => {
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const ctx = new Context()
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await ctx.plugin(SystemPrompt)
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await ctx.plugin(ToolRegistry)
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// Registered BEFORE the structured runtime exists — without prepend, this
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// goal-style listener would decide the turn first (returning WITHOUT
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// calling next()) and the veto would never run.
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ctx.on('agent/turn-continuation', () => Promise.resolve<ContinuationDecision>({ action: 'continue' }))
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const acquisition = acquireStructuredRuntime(ctx)
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const agent = { id: AgentId('structured-child') } as unknown as Agent
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acquisition.attach(agent, SCHEMA)
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const captured = await ctx.tools.execute({
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callId: 'call-1' as never,
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name: STRUCTURED_OUTPUT_TOOL,
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arguments: { answer: 1 },
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agent,
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})
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expect(captured.isError).toBeFalsy()
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const decision = await ctx.waterfall(
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'agent/turn-continuation', agent, 1,
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{ action: 'continue' },
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() => Promise.resolve<ContinuationDecision>({ action: 'continue' }),
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)
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expect(decision).toEqual({ action: 'stop' })
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acquisition.detach(agent)
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acquisition.release()
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})
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it('an invalid call gets an INVALID_ARGS isError result and the model retries in-turn', async () => {
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const { ctx, parent } = await setup([
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toolCallResponse('c1', STRUCTURED_OUTPUT_TOOL, { answer: 'not-a-number' }),
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toolCallResponse('c2', STRUCTURED_OUTPUT_TOOL, { answer: 7 }),
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])
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const run = ctx.subagents.start('spawn', structuredRequest(parent))
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const result = await run.result
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expect(result.structured).toEqual({ answer: 7 })
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expect(result.stopReason).toBe('completed')
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// The child's log carries the isError tool/result for the invalid call.
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const child = ctx.agents.get(run.id)!
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const results = child.session.events.filter(e => e.type === 'tool/result')
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expect(results.length).toBe(2)
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expect((results[0]!.data as { isError?: boolean }).isError).toBe(true)
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await run.dispose()
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})
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it('nudges a child that finished cleanly without calling the tool, then captures', async () => {
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const { ctx, parent } = await setup([
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textResponse('here is my answer in prose'),
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toolCallResponse('c1', STRUCTURED_OUTPUT_TOOL, { answer: 3 }),
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])
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const run = ctx.subagents.start('spawn', structuredRequest(parent))
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const result = await run.result
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expect(result.structured).toEqual({ answer: 3 })
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expect(result.stopReason).toBe('completed')
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// The nudge is a real user-visible message in the child's log.
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const child = ctx.agents.get(run.id)!
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const users = child.session.events.filter(e => e.type === 'user/message')
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expect(users.length).toBe(2)
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await run.dispose()
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})
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it('settles error when the nudges run out without a capture', async () => {
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const { ctx, parent, adapter } = await setup([
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textResponse('prose only'),
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textResponse('still prose'),
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], { nudges: 1 })
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const run = ctx.subagents.start('spawn', structuredRequest(parent))
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const result = await run.result
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expect(result.stopReason).toBe('error')
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expect(result.structured).toBeUndefined()
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expect(adapter.requests.length).toBe(2)
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await run.dispose()
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})
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it('zero nudge retries fails immediately after the first clean prose finish', async () => {
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const { ctx, parent, adapter } = await setup([textResponse('prose')], { nudges: 0 })
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const run = ctx.subagents.start('spawn', structuredRequest(parent))
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const result = await run.result
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expect(result.stopReason).toBe('error')
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expect(adapter.requests.length).toBe(1)
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await run.dispose()
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})
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it('a child that errored is NOT nudged (its failure is the honest result)', async () => {
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// Script exhaustion on the first call → the child turn errors.
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const { ctx, parent, adapter } = await setup([], { nudges: 3 })
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const run = ctx.subagents.start('spawn', structuredRequest(parent))
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const result = await run.result
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expect(result.stopReason).toBe('error')
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expect(adapter.requests.length).toBe(1)
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await run.dispose()
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})
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it('a cancel landing after a clean turn end stops the nudge loop: no post-cancellation turn is spent', async () => {
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const { ctx, parent, adapter } = await setup([textResponse('prose, no capture')], { nudges: 3 })
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const run = ctx.subagents.start('spawn', structuredRequest(parent))
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const child = ctx.agents.get(run.id)!
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// Cancel synchronously inside the first turn's end recording — after the
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// turn reads `completed`, before the nudge continuation resumes. The turn
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// state alone cannot see this cancel (`child.cancel()` only clears
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// queued/running work), so without the loop's own cancelled check the
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// next send would spend a fresh child turn after the caller cancelled.
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ctx.on('session/event', (session, event) => {
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if (session === child.session && event.type === 'turn/end') run.cancel('cancelled between turn end and nudge')
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})
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const result = await run.result
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expect(result.stopReason).toBe('aborted')
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// Exactly one model request: the nudge turn never ran.
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expect(adapter.requests.length).toBe(1)
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await run.dispose()
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})
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it('rejects a schema outside the subset loud, before any child exists', async () => {
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const { ctx, parent } = await setup([])
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expect(() => ctx.subagents.start('spawn', structuredRequest(parent, {
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outputSchema: { type: 'object', oneOf: [] } as unknown as StructuredOutputSchema,
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}))).toThrow(/unsupported output schema/)
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expect(ctx.agents.get(AgentId('parent'))).toBeDefined()
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})
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it('appends the structured instruction to the child REQUEST\'s system text (base prompt preserved)', async () => {
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const { ctx, parent, adapter } = await setup([toolCallResponse('c1', STRUCTURED_OUTPUT_TOOL, { answer: 1 })])
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// A context-wide section stands in for the deployment persona: the
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// instruction must APPEND to whatever the prompt pipeline assembled, not
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// replace it (AgentOptions has no prompt field — the instruction is
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// per-request wire state added by the final-request listener).
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ctx.systemPrompt.section({ name: 'test:persona', order: 10, text: 'You are a counter.' })
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const run = ctx.subagents.start('spawn', structuredRequest(parent))
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await run.result
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const childRequest = adapter.requests.at(-1)!
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expect(childRequest.system).toContain('You are a counter.')
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expect(childRequest.system!.endsWith(STRUCTURED_OUTPUT_INSTRUCTION)).toBe(true)
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expect(childRequest.system!.indexOf(STRUCTURED_OUTPUT_INSTRUCTION)).toBeGreaterThan(0)
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await run.dispose()
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})
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it('the instruction rides ONLY structured requests: appended for the child, absent for a plain agent', async () => {
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const { ctx, parent, adapter } = await setup([
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textResponse('parent answer'),
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toolCallResponse('c1', STRUCTURED_OUTPUT_TOOL, { answer: 1 }),
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])
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parent.send([{ type: 'text', text: 'hello' }])
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await parent.whenIdle()
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expect(adapter.requests[0]!.system ?? '').not.toContain(STRUCTURED_OUTPUT_INSTRUCTION)
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const run = ctx.subagents.start('spawn', structuredRequest(parent))
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await run.result
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// The loop always assembles a base prompt (the harness identity section),
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// so the instruction APPENDS — never replaces.
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const childSystem = adapter.requests.at(-1)!.system!
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expect(childSystem.endsWith(STRUCTURED_OUTPUT_INSTRUCTION)).toBe(true)
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expect(childSystem.length).toBeGreaterThan(STRUCTURED_OUTPUT_INSTRUCTION.length)
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await run.dispose()
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})
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describe('final-request enforcement (the prepend agent/request listener)', () => {
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it('a structured child sees structured_output with ITS schema; a plain agent never sees the tool', async () => {
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const { ctx, parent, adapter } = await setup([
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// Parent turn (a plain agent): must NOT see the tool.
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textResponse('parent answer'),
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// Child turn: must see it, with the run's schema.
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toolCallResponse('c1', STRUCTURED_OUTPUT_TOOL, { answer: 42 }),
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])
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parent.send([{ type: 'text', text: 'hello' }])
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await parent.whenIdle()
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expect(toolNames(adapter.requests[0]!)).not.toContain(STRUCTURED_OUTPUT_TOOL)
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const run = ctx.subagents.start('spawn', structuredRequest(parent))
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await run.result
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const childRequest = adapter.requests[1]!
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expect(toolNames(childRequest)).toContain(STRUCTURED_OUTPUT_TOOL)
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const entry = childRequest.tools!.find(tool => tool.name === STRUCTURED_OUTPUT_TOOL)!
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expect(entry.parameters).toEqual(SCHEMA)
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await run.dispose()
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})
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it('two concurrent structured children each see their OWN schema', async () => {
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const otherSchema: StructuredOutputSchema = {
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type: 'object',
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properties: { verdict: { type: 'string', enum: ['real', 'bogus'] } },
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required: ['verdict'],
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}
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const { ctx, parent, adapter } = await setup([
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(options: GenerateOptions) => {
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// Answer with whatever schema this child was given — proves each
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// request carried the right one regardless of scheduling order.
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const entry = options.tools!.find(tool => tool.name === STRUCTURED_OUTPUT_TOOL)!
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const args = 'verdict' in (entry.parameters.properties as Record<string, unknown>)
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? { verdict: 'real' }
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: { answer: 1 }
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return toolCallResponse('c1', STRUCTURED_OUTPUT_TOOL, args)
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},
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(options: GenerateOptions) => {
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const entry = options.tools!.find(tool => tool.name === STRUCTURED_OUTPUT_TOOL)!
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const args = 'verdict' in (entry.parameters.properties as Record<string, unknown>)
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? { verdict: 'real' }
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: { answer: 1 }
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return toolCallResponse('c2', STRUCTURED_OUTPUT_TOOL, args)
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},
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])
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const runA = ctx.subagents.start('spawn', structuredRequest(parent))
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const runB = ctx.subagents.start('spawn', structuredRequest(parent, { outputSchema: otherSchema }))
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const [a, b] = await Promise.all([runA.result, runB.result])
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expect(a.structured).toEqual({ answer: 1 })
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expect(b.structured).toEqual({ verdict: 'real' })
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const schemas = adapter.requests.map(request =>
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request.tools!.find(tool => tool.name === STRUCTURED_OUTPUT_TOOL)!.parameters)
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expect(schemas).toContainEqual(SCHEMA)
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expect(schemas).toContainEqual(otherSchema)
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await runA.dispose()
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await runB.dispose()
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})
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it('wins against a downstream listener that REPLACES the assembly object', async () => {
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const { ctx, parent, adapter } = await setup([
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toolCallResponse('c1', STRUCTURED_OUTPUT_TOOL, { answer: 5 }),
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])
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// A downstream (non-prepend) listener that returns a brand-new assembly —
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// the composition caveat that erases cooperative mutations. Registered
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// AFTER the runtime's prepend listener, so it runs INSIDE it.
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ctx.on('system-prompt/assemble', async (_assembly, _context, next) => {
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const replaced = await next()
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return { sections: [...replaced.sections], tools: [...replaced.tools], variables: { ...replaced.variables } }
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})
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const run = ctx.subagents.start('spawn', structuredRequest(parent))
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const result = await run.result
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expect(result.structured).toEqual({ answer: 5 })
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const entry = adapter.requests[0]!.tools!.find(tool => tool.name === STRUCTURED_OUTPUT_TOOL)
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expect(entry).toBeDefined()
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expect(entry!.parameters).toEqual(SCHEMA)
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await run.dispose()
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})
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it('a non-structured agent request keeps tools ABSENT when it had none (no tools: [] materialized)', async () => {
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const { parent, adapter } = await setup([
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// The registry contributes the placeholder via prompt assembly, so
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// tools is an array in the raw request — but after stripping the
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// placeholder (its ONLY entry), the field must not be re-added as a
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// different shape.
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textResponse('plain'),
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])
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parent.send([{ type: 'text', text: 'q' }])
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await parent.whenIdle()
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const request = adapter.requests[0]!
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expect(toolNames(request)).not.toContain(STRUCTURED_OUTPUT_TOOL)
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await new Promise(resolve => setTimeout(resolve, 0))
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})
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it('shapes a bare assembly on the waterfall: no-agent context strips the placeholder; a structured agent gains schema + trailing instruction section', async () => {
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// Drive ctx.systemPrompt.assemble directly — the enforcement listener
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// must tolerate a context with NO agent (a bare diagnostic assemble)
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// and shape a structured agent's assembly on the same path the loop
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// renders and logs as the request header.
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const { ctx, parent } = await setup([])
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const bare = await ctx.systemPrompt.assemble({})
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expect(bare.tools.map(tool => tool.name)).not.toContain(STRUCTURED_OUTPUT_TOOL)
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const acquisition = acquireStructuredRuntime(ctx)
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acquisition.attach(parent, SCHEMA)
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const shaped = await ctx.systemPrompt.assemble({ agent: parent })
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expect(shaped.tools.map(tool => tool.name)).toContain(STRUCTURED_OUTPUT_TOOL)
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expect(shaped.tools.find(tool => tool.name === STRUCTURED_OUTPUT_TOOL)!.parameters).toEqual(SCHEMA)
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// The demand travels with the tool: the instruction renders LAST
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// (appended post-next(); renderPrompt joins in array order).
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expect(shaped.sections.at(-1)).toMatchObject({ name: `tool:${STRUCTURED_OUTPUT_TOOL}`, text: STRUCTURED_OUTPUT_INSTRUCTION })
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acquisition.detach(parent)
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acquisition.release()
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})
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})
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describe('runtime lifetime (refcount: backends + live runs)', () => {
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it('registers the capture tool while a backend is loaded and unregisters when the last unloads', async () => {
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const { ctx, fiber, forkFiber } = await setup([], { withFork: true })
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expect(ctx.tools.get(STRUCTURED_OUTPUT_TOOL)).toBeDefined()
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await fiber.dispose()
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// fork still holds a reference.
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expect(ctx.tools.get(STRUCTURED_OUTPUT_TOOL)).toBeDefined()
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await forkFiber!.dispose()
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expect(ctx.tools.get(STRUCTURED_OUTPUT_TOOL)).toBeUndefined()
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})
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it('a live run-level acquisition keeps the runtime registered after EVERY backend unloads', async () => {
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// Simulates the run-holder half of the two-level lifetime: a structured
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// run acquires at start and releases at settle, so registration ordering
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// is settle-then-unregister even if all backends unload first. (A real
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// in-process child dies WITH its backend's fiber — the acquisition's
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// observable job is this ordering, which a manual holder pins directly.)
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const { ctx, fiber, forkFiber } = await setup([], { withFork: true })
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const runHolder = acquireStructuredRuntime(ctx)
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await fiber.dispose()
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await forkFiber!.dispose()
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expect(ctx.tools.get(STRUCTURED_OUTPUT_TOOL)).toBeDefined()
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runHolder.release()
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expect(ctx.tools.get(STRUCTURED_OUTPUT_TOOL)).toBeUndefined()
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})
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it('a structured run releases its acquisition when it settles (backend unload mid-run)', async () => {
|
|
const { ctx, parent, fiber } = await setup(['hang'])
|
|
const run = ctx.subagents.start('spawn', structuredRequest(parent))
|
|
// Let the child's step start streaming, then unload the backend. The
|
|
// backend owns the child agent, so the unload tears the child down and
|
|
// the run settles — releasing its own acquisition on the way out.
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|
await new Promise(resolve => setTimeout(resolve, 30))
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|
await fiber.dispose()
|
|
const result = await run.result
|
|
expect(result.stopReason).toBe('error')
|
|
// Both holders (backend + run) released — nothing keeps the runtime now.
|
|
expect(ctx.tools.get(STRUCTURED_OUTPUT_TOOL)).toBeUndefined()
|
|
await run.dispose()
|
|
})
|
|
|
|
it('fork children capture structured output through the same runtime', async () => {
|
|
const { ctx, parent } = await setup([
|
|
toolCallResponse('c1', STRUCTURED_OUTPUT_TOOL, { answer: 9 }),
|
|
], { withFork: true })
|
|
const run = ctx.subagents.start('fork', structuredRequest(parent))
|
|
const result = await run.result
|
|
expect(result.structured).toEqual({ answer: 9 })
|
|
await run.dispose()
|
|
})
|
|
|
|
it('acquisition release is idempotent (double release cannot underflow the refcount)', async () => {
|
|
const ctx = new Context()
|
|
await ctx.plugin(SystemPrompt)
|
|
await ctx.plugin(ToolRegistry)
|
|
const first = acquireStructuredRuntime(ctx)
|
|
const second = acquireStructuredRuntime(ctx)
|
|
first.release()
|
|
first.release()
|
|
// The second holder still keeps the tool registered.
|
|
expect(ctx.tools.get(STRUCTURED_OUTPUT_TOOL)).toBeDefined()
|
|
second.release()
|
|
expect(ctx.tools.get(STRUCTURED_OUTPUT_TOOL)).toBeUndefined()
|
|
})
|
|
|
|
it('registers the capture tool through the scoped fiber when tools loads after the acquisition', async () => {
|
|
// The Loader starts sibling plugins concurrently, so a backend can
|
|
// acquire the runtime before dsh-tools has applied. The capture tool
|
|
// must then register as soon as `tools` exists — via the inject fiber,
|
|
// not by deferring the backend (which would reorder the prompt's tools).
|
|
const ctx = new Context()
|
|
const acquisition = acquireStructuredRuntime(ctx)
|
|
await ctx.plugin(SystemPrompt)
|
|
await ctx.plugin(ToolRegistry)
|
|
// Fiber activation completes asynchronously after the service appears.
|
|
await new Promise(resolve => setImmediate(resolve))
|
|
expect(ctx.tools.get(STRUCTURED_OUTPUT_TOOL)).toBeDefined()
|
|
acquisition.release()
|
|
expect(ctx.tools.get(STRUCTURED_OUTPUT_TOOL)).toBeUndefined()
|
|
})
|
|
|
|
it('releasing before tools ever loads disposes the pending fiber without registering', async () => {
|
|
const ctx = new Context()
|
|
const acquisition = acquireStructuredRuntime(ctx)
|
|
acquisition.release()
|
|
await ctx.plugin(SystemPrompt)
|
|
await ctx.plugin(ToolRegistry)
|
|
await new Promise(resolve => setImmediate(resolve))
|
|
// The disposed fiber never fires: nothing registers after the fact.
|
|
expect(ctx.tools.get(STRUCTURED_OUTPUT_TOOL)).toBeUndefined()
|
|
})
|
|
|
|
it('attach/captured/detach manage per-agent state through the acquisition surface', async () => {
|
|
const { ctx, parent } = await setup([])
|
|
const acquisition = acquireStructuredRuntime(ctx)
|
|
expect(acquisition.captured(parent)).toBeUndefined()
|
|
acquisition.attach(parent, SCHEMA)
|
|
expect(acquisition.captured(parent)).toBeUndefined()
|
|
acquisition.detach(parent)
|
|
acquisition.detach(parent)
|
|
acquisition.release()
|
|
// The backend still holds its own reference from setup().
|
|
expect(ctx.tools.get(STRUCTURED_OUTPUT_TOOL)).toBeDefined()
|
|
})
|
|
})
|
|
|
|
it('a direct structured_output call from an agent WITHOUT a structured run is an isError', async () => {
|
|
const { ctx, parent } = await setup([])
|
|
const result = await ctx.tools.execute({
|
|
callId: 'x' as never,
|
|
name: STRUCTURED_OUTPUT_TOOL,
|
|
arguments: { answer: 1 },
|
|
agent: parent,
|
|
})
|
|
expect(result.isError).toBe(true)
|
|
expect(result.content[0]).toMatchObject({ type: 'text' })
|
|
})
|
|
|
|
it('a structured_output call with NO calling agent at all is an isError', async () => {
|
|
const { ctx } = await setup([])
|
|
const result = await ctx.tools.execute({
|
|
callId: 'x' as never,
|
|
name: STRUCTURED_OUTPUT_TOOL,
|
|
arguments: { answer: 1 },
|
|
})
|
|
expect(result.isError).toBe(true)
|
|
})
|
|
})
|