feat(subagent): catalog one-shot child sessions

packages/subagent/subagent-inprocess/tests/structured.spec.ts

@@ -8,7 +8,10 @@ import InvariantService from '@deepseek-ai/dsh-invariants'
 import * as SessionInvariant from '@deepseek-ai/dsh-session/invariant'
 import * as AgentInvariant from '@deepseek-ai/dsh-agent/invariant'
 import * as AgentLoopInvariant from '@deepseek-ai/dsh-agent-loop/invariant'
-import SubagentService, { type SubagentStartRequest } from '@deepseek-ai/dsh-subagent'
+import SubagentService, {
+  type ResolvedSubagentStartRequest,
+  type SubagentStartRequest,
+} from '@deepseek-ai/dsh-subagent'
 import type { Config as ToolConfig, ObjectJsonSchema } from '@deepseek-ai/dsh-tools'
 import { defineContentToolFixture, RUN_CODE_NAME } from '@deepseek-ai/dsh-tools'
 import { MockAdapter, textResponse, toolCallResponse } from '../../../core/agent-loop/tests/mock-adapter.ts'
@@ -69,7 +72,7 @@ async function setup(script: Script, options: SetupOptions = {}) {
     name: 'spawn',
     capabilities: { outputSchema: true, depthLimit: true, toolFilter: false, persona: false },
     inheritsParentContext: false,
-    start: (request: SubagentStartRequest) => startInProcessRun(request, {}),
+    start: (request: ResolvedSubagentStartRequest) => startInProcessRun(request, {}),
   })
   ctx.llm.registerAdapter(['mock'], adapter)
   const parent = ctx.agentLoop.create(SessionId('parent'), { provider: 'mock', model: 'mock' })
@@ -78,6 +81,7 @@ async function setup(script: Script, options: SetupOptions = {}) {
 
 function structuredRequest(parent: SubagentStartRequest['parent'], extra?: Partial<SubagentStartRequest>): SubagentStartRequest {
   return {
+    label: 'produce the answer',
     prompt: [{ type: 'text', text: 'produce the answer' }],
     parent,
     signal: new AbortController().signal,