diff --git a/extensions/signal/runtime-api.ts b/extensions/signal/runtime-api.ts
index 3a84b043f2b..801051438fb 100644
--- a/extensions/signal/runtime-api.ts
+++ b/extensions/signal/runtime-api.ts
@@ -1,2 +1 @@
-export * from "./src/index.js";
-export type { SignalAccountConfig } from "openclaw/plugin-sdk/signal";
+export * from "./src/runtime-api.js";
diff --git a/extensions/signal/src/accounts.ts b/extensions/signal/src/accounts.ts
index 456db907685..51bd1f7e96d 100644
--- a/extensions/signal/src/accounts.ts
+++ b/extensions/signal/src/accounts.ts
@@ -4,7 +4,7 @@ import {
   resolveAccountEntry,
   type OpenClawConfig,
 } from "openclaw/plugin-sdk/account-resolution";
-import type { SignalAccountConfig } from "openclaw/plugin-sdk/signal";
+import type { SignalAccountConfig } from "./runtime-api.js";
 
 export type ResolvedSignalAccount = {
   accountId: string;
diff --git a/extensions/signal/src/channel.setup.ts b/extensions/signal/src/channel.setup.ts
index 14ec21590bd..df5337a4761 100644
--- a/extensions/signal/src/channel.setup.ts
+++ b/extensions/signal/src/channel.setup.ts
@@ -1,6 +1,6 @@
-import { type ChannelPlugin } from "../runtime-api.js";
 import { type ResolvedSignalAccount } from "./accounts.js";
 import { signalSetupAdapter } from "./setup-core.js";
+import { type ChannelPlugin } from "./runtime-api.js";
 import { createSignalPluginBase, signalSetupWizard } from "./shared.js";
 
 export const signalSetupPlugin: ChannelPlugin<ResolvedSignalAccount> = {
diff --git a/extensions/signal/src/channel.ts b/extensions/signal/src/channel.ts
index 8b8fe842511..85aaadbd2c1 100644
--- a/extensions/signal/src/channel.ts
+++ b/extensions/signal/src/channel.ts
@@ -16,7 +16,7 @@ import {
   PAIRING_APPROVED_MESSAGE,
   resolveChannelMediaMaxBytes,
   type ChannelPlugin,
-} from "openclaw/plugin-sdk/signal";
+} from "./runtime-api.js";
 import { resolveSignalAccount, type ResolvedSignalAccount } from "./accounts.js";
 import { markdownToSignalTextChunks } from "./format.js";
 import {
diff --git a/extensions/signal/src/runtime-api.ts b/extensions/signal/src/runtime-api.ts
new file mode 100644
index 00000000000..93bce482026
--- /dev/null
+++ b/extensions/signal/src/runtime-api.ts
@@ -0,0 +1 @@
+export * from "openclaw/plugin-sdk/signal";
diff --git a/extensions/signal/src/shared.ts b/extensions/signal/src/shared.ts
index c307a51e66c..1a0579e0236 100644
--- a/extensions/signal/src/shared.ts
+++ b/extensions/signal/src/shared.ts
@@ -10,7 +10,7 @@ import {
   normalizeE164,
   SignalConfigSchema,
   type ChannelPlugin,
-} from "openclaw/plugin-sdk/signal";
+} from "./runtime-api.js";
 import {
   listSignalAccountIds,
   resolveDefaultSignalAccountId,