Function initAgents

initAgents<E = AgentEvent>(
ctx: SessionContext,
opts?: { traceWriter?: TraceWriter },
): Operation<AgentHandle<E>>
Bootstrap the agent infrastructure and register structured cleanup

Creates BranchStore, Session, and an event channel, then sets all three Effection contexts (Ctx, Store, Events) in the caller's scope. Cleanup runs on scope exit (Ctrl-C, error, normal completion) via ensure().

Context values are set in the caller's scope — visible to all subsequent operations. This is why initAgents uses ensure() rather than resource(): a resource creates a child scope where Ctx.set() would be invisible to sibling operations.

The caller creates the SessionContext (model path, nCtx, KV types are harness-specific decisions) and passes it in.
Type Parameters
- E = AgentEvent
Parameters
- ctx: SessionContext
  Session context created via createContext()
- Optionalopts: { traceWriter?: TraceWriter }
Returns Operation<AgentHandle<E>>
Agent handle with session, store, and event channel
Example: Canonical bootstrap
```
main(function*() {
  const ctx = yield* call(() => createContext({
    modelPath, nCtx: 16384,
    nSeqMax: 4, typeK: 'q4_0', typeV: 'q4_0',
  }));

  const { session, events } = yield* initAgents(ctx);
  // Ctx, Store, Events are now set — generate(), diverge(),
  // useAgentPool() will find them automatically.
  // Cleanup runs on scope exit.
});
```
- Defined in agents/src/init.ts:63