diff --git a/ui-electrobun/src/mainview/agent-store.svelte.ts b/ui-electrobun/src/mainview/agent-store.svelte.ts
index 6d6cdea..9697913 100644
--- a/ui-electrobun/src/mainview/agent-store.svelte.ts
+++ b/ui-electrobun/src/mainview/agent-store.svelte.ts
@@ -115,6 +115,11 @@ const projectSessionMap = new Map<string, string>();
 // Map sessionId -> reactive session state
 let sessions = $state<Record<string, AgentSession>>({});
 
+// Version counter — bump on every mutation to force Svelte re-renders
+// (cross-module $state reads don't auto-track in Svelte 5)
+let _v = $state(0);
+function bump() { _v++; }
+
 // Grace period timers for cleanup after done/error
 const cleanupTimers = new Map<string, ReturnType<typeof setTimeout>>();
 
@@ -235,6 +240,7 @@ function ensureListeners() {
         msg.seqId = nextSeqId(payload.sessionId);
       }
       session.messages = [...session.messages, ...converted];
+      bump(); // Force re-render
       persistMessages(session);
       // Reset stall timer on activity
       resetStallTimer(payload.sessionId, session.projectId);
@@ -262,6 +268,7 @@ function ensureListeners() {
 
     session.status = normalizeStatus(payload.status);
     if (payload.error) session.error = payload.error;
+    bump(); // Force re-render
 
     // Fix #14: Wire health store — update project status
     setProjectStatus(session.projectId, session.status === 'done' ? 'done' : session.status === 'error' ? 'error' : session.status === 'running' ? 'running' : 'idle');
@@ -306,6 +313,7 @@ function ensureListeners() {
     session.costUsd = payload.costUsd;
     session.inputTokens = payload.inputTokens;
     session.outputTokens = payload.outputTokens;
+    bump(); // Force re-render
     // Fix #14: Wire health store — record token/cost snapshot
     recordTokenSnapshot(session.projectId, payload.inputTokens + payload.outputTokens, payload.costUsd);
   });
@@ -545,6 +553,7 @@ async function _startAgentInner(
   };
 
   projectSessionMap.set(projectId, sessionId);
+  bump(); // Force re-render — new session created
   resetStallTimer(sessionId, projectId);
 
   const result = await appRpc.request['agent.start']({
@@ -609,8 +618,9 @@ export async function sendPrompt(projectId: string, prompt: string): Promise<{ o
   return appRpc.request['agent.prompt']({ sessionId, prompt });
 }
 
-/** Get the current session for a project (reactive). */
+/** Get the current session for a project (reactive via version counter). */
 export function getSession(projectId: string): AgentSession | undefined {
+  void _v; // Read version counter to subscribe Svelte's reactivity
   const sessionId = projectSessionMap.get(projectId);
   if (!sessionId) return undefined;
   return sessions[sessionId];