Merge remote-tracking branch 'origin/master' into feat/send-unify

# Conflicts:
#	examples/acp-agent/tests/snapshots/cordis-inspect-jsdoc/session.jsonl
#	examples/acp-agent/tests/snapshots/cordis-inspect-jsdoc/stdout.expected.jsonl
#	packages/cordis/tool-cordis/src/api-catalog.ts
#	packages/pty/pty-local/tests/index.spec.ts
#	packages/session-query/session-query/tests/tracing.spec.ts

packages/client/runtime/tests/manager.spec.ts

@@ -89,6 +89,66 @@ describe('list lifecycle', () => {
     expect(result).toMatchObject({ ok: true, value: { sessionId: S2 } })
     expect(manager.getListSnapshot().items.map(i => i.sessionId)).toEqual([S2])
   })
+
+  it('retains monotonic title snapshots before list arrival, merges recency, and clears them on removal', async () => {
+    const api = new FakeApiClient()
+    const manager = new SessionManager(api)
+    manager.handleMuxEnvelope({
+      rpcId: 'title-new' as never,
+      payload: { type: 'session/title', sessionId: S1, title: 'Newest', eventSeq: 4, updatedAt: 300 },
+    })
+    manager.handleMuxEnvelope({
+      rpcId: 'title-stale' as never,
+      payload: { type: 'session/title', sessionId: S1, title: 'Stale', eventSeq: 3, updatedAt: 900 },
+    })
+    manager.handleMuxEnvelope({
+      rpcId: 'title-equal' as never,
+      payload: { type: 'session/title', sessionId: S1, title: 'Equal', eventSeq: 4, updatedAt: 901 },
+    })
+    api.onList = () => Promise.resolve(ok({
+      items: [summary(S1), summary(S2, { updatedAt: 200 })] as never[],
+    }))
+    await manager.refreshList()
+
+    const titled = manager.getListSnapshot()
+    expect(titled.items.map(item => item.sessionId)).toEqual([S1, S2])
+    expect(titled.items[0]).toMatchObject({ title: 'Newest', updatedAt: 300 })
+    expect(titled.items[1]?.title).toBeUndefined()
+
+    manager.handleHostEnvelope({ rpcId: 'removed' as never, payload: { type: 'host/session-removed', sessionId: S1 } })
+    manager.handleHostEnvelope({ rpcId: 'readded' as never, payload: { type: 'host/session-added', sessionId: S1 } })
+    expect(manager.getListSnapshot().items.find(item => item.sessionId === S1)?.title).toBeUndefined()
+  })
+
+  it('drops a retained title beyond the subscription baseline before accepting its durable replay', async () => {
+    const api = new FakeApiClient()
+    api.onList = () => Promise.resolve(ok({ items: [summary(S1)] as never[] }))
+    const manager = new SessionManager(api)
+    await manager.refreshList()
+    manager.handleMuxEnvelope({
+      rpcId: 'title-unflushed' as never,
+      payload: { type: 'session/title', sessionId: S1, title: 'Unflushed', eventSeq: 4, updatedAt: 400 },
+    })
+
+    manager.handleMuxEnvelope({
+      rpcId: 'subscribed-recovered' as never,
+      payload: { type: 'session/subscribed', sessionId: S1, lastSeq: 2 },
+    })
+    expect(manager.getListSnapshot().items[0]?.title).toBeUndefined()
+    expect(manager.getListSnapshot().items[0]?.updatedAt).toBe(100)
+
+    manager.handleMuxEnvelope({
+      rpcId: 'title-durable' as never,
+      payload: { type: 'session/title', sessionId: S1, title: 'Durable', eventSeq: 2, updatedAt: 200 },
+    })
+    expect(manager.getListSnapshot().items[0]).toMatchObject({ title: 'Durable', updatedAt: 200 })
+
+    manager.handleMuxEnvelope({
+      rpcId: 'subscribed-current' as never,
+      payload: { type: 'session/subscribed', sessionId: S1, lastSeq: 2 },
+    })
+    expect(manager.getListSnapshot().items[0]).toMatchObject({ title: 'Durable', updatedAt: 200 })
+  })
 })
 
 describe('host frame routing', () => {

packages/client/runtime/tests/sessions-service.spec.ts

@@ -41,16 +41,21 @@ async function feedList(b: Bench, rows: { id: string; cwd?: string; parentId?: s
 }
 
 describe('list store projection', () => {
-  it('projects ids/byId with cwd-basename titles (id fallback) and parent links', async () => {
+  it('projects durable titles separately from cwd/id display fallbacks and parent links', async () => {
     const b = bench()
+    b.svc.manager.handleMuxEnvelope({
+      rpcId: 'title' as never,
+      payload: { type: 'session/title', sessionId: sid('s1'), title: 'Durable title', eventSeq: 2, updatedAt: 3 },
+    })
     await feedList(b, [
       { id: 's1', cwd: '/home/u/proj-a/' },
       { id: 's2', parentId: 's1', running: true },
     ])
     const state = b.svc.list.getSnapshot()
     expect(state.ids).toEqual(['s1', 's2'])
-    expect(state.byId[sid('s1')]).toMatchObject({ title: 'proj-a', cwd: '/home/u/proj-a/' })
-    expect(state.byId[sid('s2')]).toMatchObject({ title: 's2', parentId: 's1', running: true })
+    expect(state.byId[sid('s1')]).toMatchObject({ title: 'Durable title', displayTitle: 'Durable title', cwd: '/home/u/proj-a/' })
+    expect(state.byId[sid('s2')]).toMatchObject({ displayTitle: 's2', parentId: 's1', running: true })
+    expect(state.byId[sid('s2')]?.title).toBeUndefined()
   })
 
   it('reflects live increments (host stream via manager) into the store', async () => {
@@ -273,12 +278,13 @@ describe('create', () => {
 })
 
 describe('coverage tails (branch duals)', () => {
-  it('titleOf falls back to the id for empty and separator-only cwd', async () => {
+  it('displayTitleOf falls back to the id for empty and separator-only cwd', async () => {
     const b = bench()
     await feedList(b, [{ id: 'no-base', cwd: '///' }, { id: 'empty-cwd', cwd: '' }])
     const { byId } = b.svc.list.getSnapshot()
-    expect(byId[sid('no-base')]?.title).toBe('no-base')
-    expect(byId[sid('empty-cwd')]?.title).toBe('empty-cwd')
+    expect(byId[sid('no-base')]?.displayTitle).toBe('no-base')
+    expect(byId[sid('empty-cwd')]?.displayTitle).toBe('empty-cwd')
+    expect(byId[sid('no-base')]?.title).toBeUndefined()
   })
 
   it('binding for an unknown session returns undefined and leaves the staged scope intact', async () => {