[quickbeard]

Creating a session left the sidebar's Recents list unchanged. The session only turned up once something made that list reload — switching between Code and Work and back was the reliable way to do it.

Root cause

QueryProvider builds a new QueryClient on every render, and it was mounted twice:

• AppBaseProviders installs one (client A)
• AppInterface's ServerShell installed a second one (client B), nested inside it

GlobalProvider sits above ServerShell, so ServerSync — and the home session index cache it owns (context/global-sync/home-session-index.ts) — resolved A, while everything under the router, the sidebar and home screen included, resolved B.

Confirmed live by tagging both clients in a dev build:

PROBE model  client=tvzhjv  indexKey=["home","session-index","sidecar"]  total=5
PROBE apply  client=m3sfd5  state=false                                  total=36

state=false is the failure: homeSessions.apply() looks the index query up in A, where it does not exist, and returns early. Every session.created / session.updated event was written into a cache with no readers, so the list those events exist to keep fresh could only change when its own query refetched. Switching Code/Work reassigns the sidebar observer's query key, which forces exactly that refetch — hence the workaround.

Work made this obvious because there is less incidental navigation there to trigger a refetch, but Code was affected the same way. refreshIndex() in home-model.tsx kept working throughout because it runs on the reader's own client, which is why archive/rename/delete always refreshed.

Change

ServerShell renders SharedProviders directly. QueryProvider itself is untouched and still installed once, by AppBaseProviders. Both AppInterface call sites (packages/app/src/entry.tsx, packages/desktop/src/renderer/index.tsx) already wrap it in AppBaseProviders, so the nested client was always redundant.

Verification

Drove the real flow in a dev desktop build over CDP (sidebar "New session" → type → Enter) and read the sidebar DOM:

• +1s — a New session row appears at the top of Recents
• +3s — that row becomes Greeting, the model-generated title, live

Before the change the row never appeared. Titles now land in Recents as soon as the model picks one instead of waiting for the next reload.

bun typecheck clean in packages/app and packages/desktop; test:unit 657 pass, test:browser 69 pass. No automated regression test — the invariant is "ServerSync and the components reading its queries resolve the same QueryClient", which only a full-tree mount would catch, so this was verified by instrumenting the running app.

Divergence recorded in DIVERGENCES.md; user-facing note in CHANGELOG.md.

🤖 Generated with Claude Code