fix: initialize lifecycle scratch git workdirs

Author: ddx-checkpoint

cli/internal/agent/lifecycle_dispatch.go

@@ -61,7 +61,15 @@ func newLifecycleScratchDir(projectRoot string) (string, error) {
 	if err := os.MkdirAll(base, 0o755); err != nil {
 		return "", err
 	}
-	return os.MkdirTemp(base, lifecycleScratchDirPrefix)
+	dir, err := os.MkdirTemp(base, lifecycleScratchDirPrefix)
+	if err != nil {
+		return "", err
+	}
+	if out, err := internalgit.Command(context.Background(), dir, "init", "-q").CombinedOutput(); err != nil {
+		_ = os.RemoveAll(dir)
+		return "", fmt.Errorf("initialize lifecycle scratch git repo: %s: %w", strings.TrimSpace(string(out)), err)
+	}
+	return dir, nil
 }
 
 func captureLifecycleProjectStatus(projectRoot string) (lifecycleProjectStatusSnapshot, error) {

cli/internal/agent/preclaim_intake_hook_test.go

@@ -200,7 +200,15 @@ func TestPreClaimIntakeHookDispatchesOutsideProjectRoot(t *testing.T) {
 	store, b := newPreClaimIntakeHookTestStore(t, root)
 
 	svc := &preClaimIntakeHookServiceStub{
-		finalText: `{"classification":"atomic","confidence":0.99,"reasoning":"single-slice"}`,
+		executeFunc: func(req agentlib.ServiceExecuteRequest) (<-chan agentlib.ServiceEvent, error) {
+			out, err := runGitIntegOutput(req.WorkDir, "rev-parse", "--is-inside-work-tree")
+			require.NoError(t, err)
+			assert.Equal(t, "true", out)
+			ch := make(chan agentlib.ServiceEvent, 1)
+			ch <- agentlib.ServiceEvent{Type: "final", Data: []byte(`{"status":"success","final_text":"{\"classification\":\"atomic\",\"confidence\":0.99,\"reasoning\":\"single-slice\"}"}`)}
+			close(ch)
+			return ch, nil
+		},
 	}
 
 	hook := NewPreClaimIntakeHook(root, store, intakeHookTestConfig(), svc, nil)