fix(agent): preserve lifecycle recovery boundaries (PR3 round 2)

packages/compact/compact-basic/src/automatic.ts

@@ -45,6 +45,7 @@ export function registerAutomaticCompaction(
     _step: number,
     signal: AbortSignal,
   ) => {
+    if (signal.aborted) return
     try {
       const result = await service.compactIfNeeded(agent, 'pressure', signal)
       if (result !== null) logResult(result, 'post-step pressure')

packages/compact/compact-basic/tests/compact-basic.spec.ts

@@ -848,6 +848,21 @@ describe('automatic listener and loader composition', () => {
     expect(compact.calls).toHaveLength(1)
   })
 
+  it('skips post-step pressure when the step signal is already aborted', async () => {
+    const ctx = createContext()
+    const compact = new TestCompactService(ctx, {
+      models: { [MODEL]: { thresholdRatio: 0.5, retainTokens: 18 } },
+    })
+    const pressured = conversation(4)
+    const compactIfNeeded = vi.spyOn(compact, 'compactIfNeeded')
+
+    await expect(postStep(ctx, agent(pressured, MODEL), AbortSignal.abort('step aborted')))
+      .resolves.toBeUndefined()
+
+    expect(compactIfNeeded).not.toHaveBeenCalled()
+    expect(pressured.events.some(event => event.type === 'compact/start')).toBe(false)
+  })
+
   it('warns and continues after operational failures, including non-Errors', async () => {
     const ctx = createContext()
     const warnings: string[] = []