fix consume fail

internal/app/event_command.go

@@ -269,10 +269,21 @@ func newEventBusCommand() *cobra.Command {
 			ctx, cancel := signal.NotifyContext(c.Context(), os.Interrupt, syscall.SIGTERM)
 			defer cancel()
 
+			// Acquire ReadyPipe early so pre-bus.Run failures can signal
+			// 'E' to the parent process instead of silently dying.
+			readyPipe := busctl.ReadyFDFromEnv()
+			failEarly := func(err error) error {
+				if readyPipe != nil {
+					_, _ = readyPipe.Write([]byte{'E'})
+					_ = readyPipe.Close()
+				}
+				return err
+			}
+
 			configDir := defaultConfigDir()
 			resolvedID, secret, _, _, err := authpkg.ResolveAppCredentialsStrict(configDir)
 			if err != nil {
-				return fmt.Errorf("event _bus: %w", err)
+				return failEarly(fmt.Errorf("event _bus: %w", err))
 			}
 			clientID := resolvedID
 			if clientIDOverride != "" {
@@ -288,7 +299,7 @@ func newEventBusCommand() *cobra.Command {
 				ClientSecret: secret,
 			})
 			if err != nil {
-				return err
+				return failEarly(err)
 			}
 
 			// busLogger writes to bus.log inside WorkDir so the daemon's
@@ -310,7 +321,7 @@ func newEventBusCommand() *cobra.Command {
 				Edition:     editionName,
 				Source:      src,
 				IdleTimeout: idleTimeout,
-				ReadyPipe:   busctl.ReadyFDFromEnv(),
+				ReadyPipe:   readyPipe,
 				Logger:      slog.Default(),
 			}
 			// env-var tuning (only fills in fields left at zero; explicit

internal/event/types.go

@@ -82,16 +82,17 @@ func itoa(n int64) string {
 }
 
 // ClientIDHash returns the path-safe identifier derived from the (possibly
-// unsafe) ClientID string. We use sha256(clientID)[:16] hex-encoded; this is
-// the value placed in filesystem paths and Named Pipe names. The original
-// ClientID is stored in bus.meta and shown in status output. See plan
-// "路径安全" decision in §1.
+// unsafe) ClientID string. We use sha256(clientID)[:8] hex-encoded (16 chars);
+// this is the value placed in filesystem paths and Named Pipe names. 8 bytes
+// (64 bits) is sufficient to distinguish a handful of ClientIDs on one machine
+// while keeping the Unix socket path under macOS's 104-byte sun_path limit.
+// The original ClientID is stored in bus.meta and shown in status output.
 func ClientIDHash(clientID string) string {
 	if clientID == "" {
 		return ""
 	}
 	h := sha256.Sum256([]byte(clientID))
-	return hex.EncodeToString(h[:16])
+	return hex.EncodeToString(h[:8])
 }
 
 // RedactSecret returns a redacted form of a secret string for logging and

internal/event/types_test.go

@@ -60,7 +60,7 @@ func TestRawEvent_DedupKey_NilSafe(t *testing.T) {
 }
 
 func TestClientIDHash_StableAndPathSafe(t *testing.T) {
-	pathSafe := regexp.MustCompile(`^[0-9a-f]{32}$`)
+	pathSafe := regexp.MustCompile(`^[0-9a-f]{16}$`)
 	cases := []string{
 		"ding_abc123",
 		"ding_with_special!@#",
@@ -72,7 +72,7 @@ func TestClientIDHash_StableAndPathSafe(t *testing.T) {
 	for _, in := range cases {
 		got := ClientIDHash(in)
 		if !pathSafe.MatchString(got) {
-			t.Fatalf("ClientIDHash(%q) = %q, not path-safe hex16(32 chars)", in, got)
+			t.Fatalf("ClientIDHash(%q) = %q, not path-safe hex8(16 chars)", in, got)
 		}
 		// Stable
 		if got2 := ClientIDHash(in); got2 != got {