refactor(agent): unify sourced message delivery

packages/core/agent-loop/tests/cancel.spec.ts

@@ -33,7 +33,7 @@ async function harness(adapter: MockAdapter) {
 }
 
 function send(agent: Agent, text: string) {
-  agent.followup([{ type: 'text', text }])
+  agent.followup({ content: [{ type: 'text', text }], source: { kind: 'user' } })
 }
 
 /** Resolve on the agent's next idle transition (event-based, not status poll). */
@@ -63,7 +63,7 @@ describe('Agent.cancel()', () => {
     ctx.on('agent/cancel-requested', (subject, cause) => {
       if (subject !== agent) return
       seen.push(`first:${cause.kind}`)
-      subject.followup([{ type: 'text', text: 'queued by cancel observer' }])
+      subject.followup({ content: [{ type: 'text', text: 'queued by cancel observer' }], source: { kind: 'user' } })
       throw new Error('observer failed')
     })
     ctx.on('agent/cancel-requested', (subject, cause) => {
@@ -106,11 +106,7 @@ describe('Agent.cancel()', () => {
     ctx.on('agent/inbox/discard', (subject, items) => { if (subject === agent) discards.push(items) })
 
     // Queue a turn WITHOUT waking the driver, so it sits in the inbox.
-    agent.send([{ type: 'text', text: 'preserved' }], {
-      target: 'next-turn',
-      wakeup: false,
-      source: { kind: 'user' },
-    })
+    agent.send({ content: [{ type: 'text', text: 'preserved' }], source: { kind: 'user' } }, { target: 'next-turn', wakeup: false })
     // keepInbox cancel: no active turn, work preserved, no discard event.
     agent.cancel({ kind: 'user' }, { keepInbox: true })
     expect(discards).toEqual([])
@@ -128,11 +124,7 @@ describe('Agent.cancel()', () => {
 
     // A quiet item alone must NOT wake the driver: no turn runs and whenIdle
     // resolves (the agent is quiescent), leaving the item queued.
-    agent.send([{ type: 'text', text: 'quiet' }], {
-      target: 'next-turn',
-      wakeup: false,
-      source: { kind: 'user' },
-    })
+    agent.send({ content: [{ type: 'text', text: 'quiet' }], source: { kind: 'user' } }, { target: 'next-turn', wakeup: false })
     await agent.whenIdle()
     expect(agent.status).toBe('idle')
     expect(agent.session.events.some(e => e.type === 'turn/start')).toBe(false)
@@ -148,11 +140,7 @@ describe('Agent.cancel()', () => {
     const ctx = await harness(adapter)
     const agent = ctx.agentLoop.create(SessionId('a1'), { provider: 'mock', model: 'mock' })
 
-    agent.send([{ type: 'text', text: 'quiet' }], {
-      target: 'next-turn',
-      wakeup: false,
-      source: { kind: 'user' },
-    })
+    agent.send({ content: [{ type: 'text', text: 'quiet' }], source: { kind: 'user' } }, { target: 'next-turn', wakeup: false })
     const idle = agent.whenIdle()
     // Cancel reaches quiescence with no status transition and no waking send;
     // whenIdle must still resolve (previously it hung until the next send).
@@ -587,7 +575,7 @@ describe('Agent.cancel()', () => {
     expect(agent.status).toBe('running')
     // Steer (joins the running turn's steering FIFO), then cancel: the steering
     // must be dropped, NOT re-enqueued as a new queued turn.
-    agent.steer([{ type: 'text', text: 'steer text' }])
+    agent.steer({ content: [{ type: 'text', text: 'steer text' }], source: { kind: 'user' } })
     agent.cancel({ kind: 'user' })
     await waitForIdle(ctx, agent)