refactor(agent): trim obsolete loop surfaces

packages/examples/agent-spine-demo/tests/agent-core.spec.ts

@@ -226,7 +226,6 @@ describe('dsh-agent-spine-demo bundle', () => {
     })
 
     handle.agent.followup([{ type: 'text', text: 'recover' }])
-    await expect.poll(() => adapter.requests).toBe(2)
     await waitForIdle(ctx, handle.agent)
 
     expect(adapter.requests).toBe(2)

packages/examples/cli-demo/src/cli.ts

@@ -388,7 +388,6 @@ export function formatTurnFailure(reason: TurnEndReason): string {
     case 'error': return `failed at step ${reason.step}: ${'failure' in reason ? reason.failure.message : reason.message}`
     case 'disposed': return 'was disposed'
     case 'max-tokens': return 'reached the model output-token limit'
-    case 'rejected': return `was rejected: ${reason.reason}`
     case 'interrupted': return 'was interrupted during persistence recovery'
     default: return `ended with ${JSON.stringify(reason)}`
   }

packages/examples/cli-demo/tests/cli.spec.ts

@@ -501,7 +501,6 @@ describe('formatTurnFailure', () => {
       [{ kind: 'error', step: 3, failure: { message: 'provider bad', code: 'SERVER' } }, 'failed at step 3: provider bad'],
       [{ kind: 'disposed' }, 'was disposed'],
       [{ kind: 'max-tokens' }, 'output-token limit'],
-      [{ kind: 'rejected', reason: 'policy' }, 'was rejected: policy'],
       [{ kind: 'interrupted' }, 'persistence recovery'],
     ]
     for (const [reason, expected] of cases) expect(formatTurnFailure(reason)).toContain(expected)