feat(chats): add managed projectless chat sessions

Create projectless chat sessions under a managed, date-scoped Chats directory and clean abandoned or deleted session folders.

Add Chats to sidebar state, startup cache, shared context, and Electron Mini Chat while keeping VS Code project-only. Resolve managed chat directories to one server-side memory owner and document the runtime contracts.

packages/web/server/lib/agent-memory/project-resolution.js

@@ -24,7 +24,8 @@ const normalize = (value) => {
 };
 
 export const createMemoryProjectResolver = (dependencies) => {
-  const { listProjectPaths, resolvePrimaryWorktreeRoot } = dependencies;
+  const { listProjectPaths, resolvePrimaryWorktreeRoot, managedProjectRoots = [] } = dependencies;
+  const managedRoots = managedProjectRoots.map(normalize).filter(Boolean);
 
   return async (directory) => {
     const resolved = normalize(directory);
@@ -32,6 +33,14 @@ export const createMemoryProjectResolver = (dependencies) => {
       return '';
     }
 
+    const managedRoot = managedRoots.find((root) => {
+      const relative = path.relative(root, resolved);
+      return relative === '' || (!relative.startsWith('..') && !path.isAbsolute(relative));
+    });
+    if (managedRoot) {
+      return createProjectIdFromPath(managedRoot);
+    }
+
     let configured = [];
     try {
       configured = ((await listProjectPaths()) || []).map(normalize).filter(Boolean);

packages/web/server/lib/agent-memory/project-resolution.test.js

@@ -51,6 +51,15 @@ describe('resolving a session directory to its project', () => {
     expect(await resolve('/tmp/loose')).toBe(createProjectIdFromPath('/tmp/loose'));
   });
 
+  test('managed chat session directories share the Chats root store', async () => {
+    const chatsRoot = '/Users/x/.config/openchamber/chats';
+    const resolve = createResolver({ managedProjectRoots: [chatsRoot] });
+
+    expect(await resolve(`${chatsRoot}/2026-08-21/session-a`)).toBe(createProjectIdFromPath(chatsRoot));
+    expect(await resolve(`${chatsRoot}/2026-08-21/session-b`)).toBe(createProjectIdFromPath(chatsRoot));
+    expect(await resolve('/Users/x/.config/openchamber/chats-other/session-a')).not.toBe(createProjectIdFromPath(chatsRoot));
+  });
+
   test('no directory resolves to nothing rather than to some default project', async () => {
     const resolve = createResolver();