fix(mcp): refresh prompt slash commands

packages/app/src/context/global-sync/event-reducer.test.ts

@@ -134,6 +134,25 @@ describe("applyGlobalEvent", () => {
 })
 
 describe("applyDirectoryEvent", () => {
+  test("refreshes commands when command catalog changes", () => {
+    const [store, setStore] = createStore(baseState())
+    let refreshCount = 0
+
+    applyDirectoryEvent({
+      event: { type: "command.changed" },
+      store,
+      setStore,
+      push() {},
+      directory: "/tmp",
+      loadCommand() {
+        refreshCount += 1
+      },
+      loadLsp() {},
+    })
+
+    expect(refreshCount).toBe(1)
+  })
+
   test("preserves a Home-specific retained session limit", () => {
     const [store, setStore] = createStore(
       baseState({

packages/app/src/context/global-sync/event-reducer.ts

@@ -96,6 +96,7 @@ export function applyDirectoryEvent(input: {
   setStore: SetStoreFunction<State>
   push: (directory: string) => void
   directory: string
+  loadCommand?: () => void
   loadLsp: () => void
   vcsCache?: VcsCache
   setSessionTodo?: (sessionID: string, todos: Todo[] | undefined) => void
@@ -108,6 +109,10 @@ export function applyDirectoryEvent(input: {
       input.push(input.directory)
       return
     }
+    case "command.changed": {
+      input.loadCommand?.()
+      return
+    }
     case "session.created": {
       const info = (event.properties as { info: Session }).info
       const result = Binary.search(input.store.session, info.id, (s) => s.id)

packages/app/src/context/server-sync.tsx

@@ -407,6 +407,13 @@ export function createServerSyncContextInner(_serverSDK?: ServerSDK) {
       setSessionTodo,
       retainedLimit: sessionMeta.get(key)?.limit,
       vcsCache: children.vcsCache.get(key),
+      loadCommand: () => {
+        void retry(() =>
+          sdkFor(directory)
+            .command.list()
+            .then((x) => setStore("command", x.data ?? [])),
+        )
+      },
       loadLsp: () => {
         void queryClient.fetchQuery(queryOptionsApi.lsp(key))
       },