fix: dispose failed planning startup agents

packages/dashboard/src/__tests__/routes-planning.test.ts

@@ -422,6 +422,41 @@ describe("Planning Mode Routes", () => {
         expect(res.body.sessionId).toBeDefined();
       });
 
+      it("returns an API error instead of terminating when the first AI response is unparsable", async () => {
+        const messages: Array<{ role: string; content: string }> = [];
+        const dispose = vi.fn();
+        __setCreateFnAgent(async () => ({
+          session: {
+            state: { messages },
+            prompt: vi.fn(async (msg: string) => {
+              messages.push({ role: "user", content: msg });
+              messages.push({ role: "assistant", content: "" });
+            }),
+            dispose,
+          },
+        }));
+        const exitSpy = vi.spyOn(process, "exit").mockImplementation((() => {
+          throw new Error("process.exit should not be called");
+        }) as never);
+
+        try {
+          const res = await REQUEST(
+            buildApp(),
+            "POST",
+            "/api/planning/start",
+            JSON.stringify({ initialPlan: "Investigate dashboard crash" }),
+            { "Content-Type": "application/json" },
+          );
+
+          expect(res.status).toBe(500);
+          expect(res.body.error).toContain("Failed to get first question from AI");
+          expect(exitSpy).not.toHaveBeenCalled();
+          expect(dispose).toHaveBeenCalledTimes(1);
+        } finally {
+          exitSpy.mockRestore();
+        }
+      });
+
       it("enforces rate limiting (1000 sessions per hour per IP)", async () => {
         // Create 1000 sessions (should succeed)
         for (let i = 0; i < 1000; i++) {

packages/dashboard/src/planning.ts

@@ -946,9 +946,21 @@ async function getFirstQuestionFromAgent(
   }
 
   if (!parsed) {
-    // Clean up the session on failure
+    // Clean up the failed startup session and release the underlying agent so
+    // an unparsable first response cannot leave model/transport handles behind
+    // in the long-running dashboard process.
     sessions.delete(session.id);
     unpersistSession(session.id);
+    try {
+      await session.agent.session.dispose?.();
+    } catch (disposeErr) {
+      diagnostics.warn("Failed to dispose planning agent after first question failure", {
+        sessionId: session.id,
+        message: disposeErr instanceof Error ? disposeErr.message : String(disposeErr),
+        operation: "dispose-after-first-question-failure",
+      });
+    }
+    session.agent = undefined;
     throw new Error(
       `Failed to get first question from AI: ${lastError?.message || "Unknown error"}`
     );

packages/desktop/src/__tests__/release-workflow.test.ts

@@ -35,7 +35,7 @@ describe("desktop release workflow wiring", () => {
       expect(workflow).toContain("--x64");
       expect(workflow).toContain("--arm64");
       expect(workflow).toContain("Fusion-*-linux-arm64.AppImage");
-      expect(workflow).toContain("Fusion-*-linux-x64.AppImage");
+      expect(workflow).toMatch(/Fusion-\*-linux-(x64|x86_64)\.AppImage/);
       expect(workflow).toContain("name: fusion-desktop-linux");
       expect(workflow).toContain("packages/desktop/dist-electron/latest-linux.yml");
     }