feat(agent-ui): rename session title in list (A6.193)

packages/agent-ui/README.md

@@ -308,6 +308,7 @@ consumption of shared panel shells:
 | A6.190 | Deleted session id blocklist ops |
 | A6.191 | Hydrate active session resolve |
 | A6.192 | Insert session after active tab |
+| A6.193 | Rename session title in list |
 
 ### A5 complete enough
 

packages/agent-ui/src/__tests__/renameSessionInList.test.ts

@@ -0,0 +1,14 @@
+import { describe, expect, it } from "vitest";
+import { renameSessionInList } from "../lib/renameSessionInList.js";
+
+describe("renameSessionInList", () => {
+  it("renames and stamps updatedAt", () => {
+    const out = renameSessionInList(
+      [{ id: "a", title: "Old", updatedAt: 1 }],
+      "a",
+      "New",
+      99,
+    );
+    expect(out).toEqual([{ id: "a", title: "New", updatedAt: 99 }]);
+  });
+});

packages/agent-ui/src/index.ts

@@ -893,6 +893,8 @@ export {
   createUntitledSessionMeta,
 } from "./lib/resolveActiveSessionOnHydrate.js";
 export { insertSessionAfterActive } from "./lib/insertSessionAfterActive.js";
+export { renameSessionInList } from "./lib/renameSessionInList.js";
+export type { SessionTitleMeta } from "./lib/renameSessionInList.js";
 export type { SessionIdTitle } from "./lib/resolveActiveSessionOnHydrate.js";
 export type {
   UntitledSessionMeta,

packages/agent-ui/src/lib/renameSessionInList.ts

@@ -0,0 +1,17 @@
+/**
+ * Pure session title rename in a list (A6.193).
+ */
+
+export type SessionTitleMeta = { id: string; title: string; updatedAt: number };
+
+/** Rename one session and bump updatedAt; pure, no mutation of input. */
+export function renameSessionInList<T extends SessionTitleMeta>(
+  sessions: readonly T[],
+  id: string,
+  title: string,
+  now: number = Date.now(),
+): T[] {
+  return sessions.map((s) =>
+    s.id === id ? { ...s, title, updatedAt: now } : s,
+  );
+}

src/modules/ai/store/chatStore.ts

@@ -5,6 +5,7 @@ import {
   resolveActiveSessionOnHydrate,
   createUntitledSessionMeta,
   insertSessionAfterActive,
+  renameSessionInList,
 } from "@altai/agent-ui";
 import type { UIMessage } from "ai";
 import { native } from "../lib/native";
@@ -1079,9 +1080,7 @@ export const useChatStore = create<StoreState>((set, get) => ({
   },
 
   renameSession: (id, title) => {
-    const next = get().sessions.map((s) =>
-      s.id === id ? { ...s, title, updatedAt: Date.now() } : s,
-    );
+    const next = renameSessionInList(get().sessions, id, title);
     set({ sessions: next });
     void saveSessionsList(next);
   },