fix(acp): reconnect agent when folder selector switches working directory

src/contexts/acp-connections-context.tsx

@@ -110,6 +110,7 @@ export interface ConnectionState {
   connectionId: string
   contextKey: string
   agentType: AgentType
+  workingDir: string | null
   status: ConnectionStatus
   promptCapabilities: PromptCapabilitiesInfo
   supportsFork: boolean
@@ -134,6 +135,7 @@ type Action =
       contextKey: string
       connectionId: string
       agentType: AgentType
+      workingDir: string | null
     }
   | { type: "CONNECTION_REMOVED"; contextKey: string }
   | { type: "REMOVE_ALL" }
@@ -601,6 +603,7 @@ function connectionsReducer(
         connectionId: action.connectionId,
         contextKey: action.contextKey,
         agentType: action.agentType,
+        workingDir: action.workingDir,
         status: "connecting",
         promptCapabilities: {
           image: false,
@@ -2167,10 +2170,12 @@ export function AcpConnectionsProvider({ children }: { children: ReactNode }) {
           throw createAlertedError(blocked.reason)
         }
 
+        const nextWorkingDir = workingDir ?? null
         const existing = storeRef.current.connections.get(contextKey)
         if (existing) {
           if (
             existing.agentType === agentType &&
+            existing.workingDir === nextWorkingDir &&
             existing.status !== "disconnected" &&
             existing.status !== "error"
           ) {
@@ -2204,6 +2209,7 @@ export function AcpConnectionsProvider({ children }: { children: ReactNode }) {
           contextKey,
           connectionId,
           agentType,
+          workingDir: nextWorkingDir,
         })
 
         const buffered = consumeBufferedEvents(connectionId)

src/hooks/use-connection-lifecycle.ts

@@ -129,35 +129,35 @@ export function useConnectionLifecycle({
 
   // Auto-connect when tab becomes active and workingDir is available.
   // Depends on isActive + workingDir so that connections wait for folder
-  // info to load (workingDir transitions from undefined → folder.path).
+  // info to load (workingDir transitions from undefined → folder.path),
+  // and so that changing folders on an already-connected tab triggers a
+  // reconnect with the new cwd. The context's connect() dedups same-param
+  // calls and disconnects+reconnects when workingDir differs.
   // Status changes must NOT re-trigger this to avoid infinite reconnect
   // loops on transient errors.
   useEffect(() => {
     if (!isActive) return
     if (!workingDir) return
     let cancelled = false
-    const s = statusRef.current
-    if (!s || s === "disconnected" || s === "error") {
-      connConnectRef
-        .current(agentTypeRef.current, workingDir, sessionIdRef.current)
-        .then(() => {
-          if (!cancelled) {
-            setLastAutoConnectError(null)
-          }
-        })
-        .catch((e: unknown) => {
-          if (!cancelled) {
-            setLastAutoConnectError({
-              contextKey: contextKeyRef.current,
-              agentType: agentTypeRef.current,
-              message: normalizeErrorMessage(e),
-            })
-          }
-          if (!isExpectedConnectError(e)) {
-            console.error("[ConnLifecycle] auto-connect:", e)
-          }
-        })
-    }
+    connConnectRef
+      .current(agentTypeRef.current, workingDir, sessionIdRef.current)
+      .then(() => {
+        if (!cancelled) {
+          setLastAutoConnectError(null)
+        }
+      })
+      .catch((e: unknown) => {
+        if (!cancelled) {
+          setLastAutoConnectError({
+            contextKey: contextKeyRef.current,
+            agentType: agentTypeRef.current,
+            message: normalizeErrorMessage(e),
+          })
+        }
+        if (!isExpectedConnectError(e)) {
+          console.error("[ConnLifecycle] auto-connect:", e)
+        }
+      })
     return () => {
       cancelled = true
     }