diff --git a/ui-electrobun/src/mainview/agent-store.svelte.ts b/ui-electrobun/src/mainview/agent-store.svelte.ts
index 0e5ba80..8c3cbfc 100644
--- a/ui-electrobun/src/mainview/agent-store.svelte.ts
+++ b/ui-electrobun/src/mainview/agent-store.svelte.ts
@@ -574,6 +574,7 @@ export async function stopAgent(projectId: string): Promise<{ ok: boolean; error
 
 /** Send a follow-up prompt to a running session. */
 export async function sendPrompt(projectId: string, prompt: string): Promise<{ ok: boolean; error?: string }> {
+  ensureListeners();
   const sessionId = projectSessionMap.get(projectId);
   if (!sessionId) return { ok: false, error: 'No session for project' };
 
@@ -798,5 +799,6 @@ function enforceMaxSessions(projectId: string): void {
   }
 }
 
-/** Initialize listeners on module load. */
-ensureListeners();
+// NOTE: Do NOT call ensureListeners() at module load — appRpc may not be
+// initialized yet (setAppRpc runs in main.ts after module imports resolve).
+// Listeners are registered lazily on first startAgent/getSession/sendPrompt call.