fix(agent-manager): restore promoted session metadata

.changeset/restore-promoted-worktree-title.md

@@ -0,0 +1,5 @@
+---
+"kilo-code": patch
+---
+
+Restore the session title and branch subtitle immediately when opening an existing session in a worktree.

packages/kilo-vscode/tests/unit/project-sessions-live.test.ts

@@ -0,0 +1,37 @@
+import { describe, expect, it } from "bun:test"
+import { createRoot, createSignal } from "solid-js"
+import { createProjectSessionsLive } from "../../webview-ui/agent-manager/project/sessions-live"
+import type { ProjectSessionInfo, SessionInfo } from "../../webview-ui/src/types/messages"
+
+const session = (worktreeId: string | null): ProjectSessionInfo => ({
+  id: "session-1",
+  parentID: null,
+  title: "Restore worktree metadata",
+  createdAt: "2026-08-26T10:00:00.000Z",
+  updatedAt: "2026-08-26T10:00:00.000Z",
+  worktreeId,
+})
+
+describe("project session live state", () => {
+  it("uses managed placement while the project session cache is stale", () => {
+    createRoot((dispose) => {
+      const [base] = createSignal<Record<string, ProjectSessionInfo[]>>({ project: [session(null)] })
+      const [store] = createSignal<SessionInfo[]>([session(null)])
+      const live = createProjectSessionsLive({
+        base,
+        pid: () => "project",
+        enabled: () => true,
+        store,
+        managed: () => [{ id: "session-1", worktreeId: "worktree-1", createdAt: "2026-08-26T10:00:00.000Z" }],
+        locals: () => new Set(),
+      })
+
+      expect(live().project?.[0]).toMatchObject({
+        id: "session-1",
+        title: "Restore worktree metadata",
+        worktreeId: "worktree-1",
+      })
+      dispose()
+    })
+  })
+})

packages/kilo-vscode/webview-ui/agent-manager/project/sessions-live.ts

@@ -30,7 +30,8 @@ export function createProjectSessionsLive(opts: {
     const live = new Map(store.filter(isKnownRootSession).map((item) => [item.id, item]))
     const merged = pushed.map((item) => {
       const fresh = live.get(item.id)
-      return fresh ? { ...fresh, worktreeId: item.worktreeId } : item
+      const worktreeId = managed.has(item.id) ? managed.get(item.id)! : item.worktreeId
+      return fresh ? { ...fresh, worktreeId } : worktreeId === item.worktreeId ? item : { ...item, worktreeId }
     })
     const known = new Set(pushed.map((item) => item.id))
     const owned = (id: string) => managed.has(id) || opts.locals().has(id)