diff --git a/extensions/signal/src/approval-auth.ts b/extensions/signal/src/approval-auth.ts
index 83006136101..a8e5133af52 100644
--- a/extensions/signal/src/approval-auth.ts
+++ b/extensions/signal/src/approval-auth.ts
@@ -5,7 +5,7 @@ import {
 import { normalizeSignalMessagingTarget } from "openclaw/plugin-sdk/channel-targets";
 import { normalizeE164 } from "openclaw/plugin-sdk/text-runtime";
 import { resolveSignalAccount } from "./accounts.js";
-import { looksLikeUuid } from "./identity.js";
+import { looksLikeUuid } from "./uuid.js";
 
 function normalizeSignalApproverId(value: string | number): string | undefined {
   const normalized = normalizeSignalMessagingTarget(String(value));
diff --git a/extensions/signal/src/identity.ts b/extensions/signal/src/identity.ts
index dbd86ca1584..4375e79e0c4 100644
--- a/extensions/signal/src/identity.ts
+++ b/extensions/signal/src/identity.ts
@@ -1,5 +1,6 @@
 import { evaluateSenderGroupAccessForPolicy } from "openclaw/plugin-sdk/group-access";
 import { normalizeE164 } from "openclaw/plugin-sdk/text-runtime";
+import { looksLikeUuid } from "./uuid.js";
 
 export type SignalSender =
   | { kind: "phone"; raw: string; e164: string }
@@ -10,19 +11,7 @@ type SignalAllowEntry =
   | { kind: "phone"; e164: string }
   | { kind: "uuid"; raw: string };
 
-const UUID_HYPHENATED_RE = /^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$/i;
-const UUID_COMPACT_RE = /^[0-9a-f]{32}$/i;
-
-export function looksLikeUuid(value: string): boolean {
-  if (UUID_HYPHENATED_RE.test(value) || UUID_COMPACT_RE.test(value)) {
-    return true;
-  }
-  const compact = value.replace(/-/g, "");
-  if (!/^[0-9a-f]+$/i.test(compact)) {
-    return false;
-  }
-  return /[a-f]/i.test(compact);
-}
+export { looksLikeUuid } from "./uuid.js";
 
 function stripSignalPrefix(value: string): string {
   return value.replace(/^signal:/i, "").trim();
diff --git a/extensions/signal/src/outbound-session.ts b/extensions/signal/src/outbound-session.ts
index b239b6c252c..0b56664e27a 100644
--- a/extensions/signal/src/outbound-session.ts
+++ b/extensions/signal/src/outbound-session.ts
@@ -1,10 +1,6 @@
 import { type RoutePeer } from "openclaw/plugin-sdk/routing";
-import {
-  looksLikeUuid,
-  resolveSignalPeerId,
-  resolveSignalRecipient,
-  resolveSignalSender,
-} from "./identity.js";
+import { resolveSignalPeerId, resolveSignalRecipient, resolveSignalSender } from "./identity.js";
+import { looksLikeUuid } from "./uuid.js";
 
 export type ResolvedSignalOutboundTarget = {
   peer: RoutePeer;
diff --git a/extensions/signal/src/uuid.ts b/extensions/signal/src/uuid.ts
new file mode 100644
index 00000000000..4736e1949bd
--- /dev/null
+++ b/extensions/signal/src/uuid.ts
@@ -0,0 +1,13 @@
+const UUID_HYPHENATED_RE = /^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$/i;
+const UUID_COMPACT_RE = /^[0-9a-f]{32}$/i;
+
+export function looksLikeUuid(value: string): boolean {
+  if (UUID_HYPHENATED_RE.test(value) || UUID_COMPACT_RE.test(value)) {
+    return true;
+  }
+  const compact = value.replace(/-/g, "");
+  if (!/^[0-9a-f]+$/i.test(compact)) {
+    return false;
+  }
+  return /[a-f]/i.test(compact);
+}