diff --git a/src/headless-events.ts b/src/headless-events.ts
index d2199ef64..190ac99a1 100644
--- a/src/headless-events.ts
+++ b/src/headless-events.ts
@@ -20,6 +20,8 @@ export const EXIT_CANCELLED = 11
  * Map a headless session status string to its standardized exit code.
  *
  *   success   → 0
+ *   complete  → 0
+ *   completed → 0
  *   error     → 1
  *   timeout   → 1
  *   blocked   → 10
@@ -31,6 +33,7 @@ export function mapStatusToExitCode(status: string): number {
   switch (status) {
     case 'success':
     case 'complete':
+    case 'completed':
       return EXIT_SUCCESS
     case 'error':
     case 'timeout':
diff --git a/src/resources/extensions/gsd/guided-flow.ts b/src/resources/extensions/gsd/guided-flow.ts
index 2cda89d72..2ad23e473 100644
--- a/src/resources/extensions/gsd/guided-flow.ts
+++ b/src/resources/extensions/gsd/guided-flow.ts
@@ -178,6 +178,7 @@ export function checkAutoStartAfterDiscuss(): boolean {
   try { unlinkSync(manifestPath); } catch { /* may not exist for single-milestone */ }
 
   pendingAutoStart = null;
+  ctx.ui.notify(`Milestone ${milestoneId} ready.`, "info");
   startAuto(ctx, pi, basePath, false, { step }).catch((err) => {
     ctx.ui.notify(`Auto-start failed: ${getErrorMessage(err)}`, "error");
     if (process.env.GSD_DEBUG) console.error('[gsd] auto start error:', err);
diff --git a/src/tests/headless-events.test.ts b/src/tests/headless-events.test.ts
index 12a6e8ca0..60c0695e7 100644
--- a/src/tests/headless-events.test.ts
+++ b/src/tests/headless-events.test.ts
@@ -149,3 +149,39 @@ test('empty filter blocks all events', () => {
   assert.ok(!shouldEmit('agent_end'))
   assert.ok(!shouldEmit('message_update'))
 })
+
+import { mapStatusToExitCode, EXIT_SUCCESS, EXIT_ERROR, EXIT_BLOCKED, EXIT_CANCELLED } from '../headless-events.js'
+
+// ─── mapStatusToExitCode ─────────────────────────────────────────────────
+
+test('mapStatusToExitCode: "complete" returns EXIT_SUCCESS', () => {
+  assert.equal(mapStatusToExitCode('complete'), EXIT_SUCCESS)
+})
+
+test('mapStatusToExitCode: "completed" returns EXIT_SUCCESS', () => {
+  assert.equal(mapStatusToExitCode('completed'), EXIT_SUCCESS)
+})
+
+test('mapStatusToExitCode: "success" returns EXIT_SUCCESS', () => {
+  assert.equal(mapStatusToExitCode('success'), EXIT_SUCCESS)
+})
+
+test('mapStatusToExitCode: "error" returns EXIT_ERROR', () => {
+  assert.equal(mapStatusToExitCode('error'), EXIT_ERROR)
+})
+
+test('mapStatusToExitCode: "timeout" returns EXIT_ERROR', () => {
+  assert.equal(mapStatusToExitCode('timeout'), EXIT_ERROR)
+})
+
+test('mapStatusToExitCode: "blocked" returns EXIT_BLOCKED', () => {
+  assert.equal(mapStatusToExitCode('blocked'), EXIT_BLOCKED)
+})
+
+test('mapStatusToExitCode: "cancelled" returns EXIT_CANCELLED', () => {
+  assert.equal(mapStatusToExitCode('cancelled'), EXIT_CANCELLED)
+})
+
+test('mapStatusToExitCode: unknown status returns EXIT_ERROR', () => {
+  assert.equal(mapStatusToExitCode('unknown'), EXIT_ERROR)
+})