diff --git a/extensions/line/src/channel-api.ts b/extensions/line/src/channel-api.ts
new file mode 100644
index 00000000000..08f23125101
--- /dev/null
+++ b/extensions/line/src/channel-api.ts
@@ -0,0 +1,22 @@
+import { DEFAULT_ACCOUNT_ID } from "openclaw/plugin-sdk/account-id";
+import type { OpenClawConfig } from "openclaw/plugin-sdk/account-resolution";
+import type { ChannelPlugin } from "openclaw/plugin-sdk/core";
+import {
+  listLineAccountIds,
+  normalizeAccountId,
+  resolveDefaultLineAccountId,
+  resolveLineAccount,
+} from "./accounts.js";
+import { resolveExactLineGroupConfigKey } from "./group-keys.js";
+import type { ResolvedLineAccount } from "./types.js";
+
+export {
+  DEFAULT_ACCOUNT_ID,
+  listLineAccountIds,
+  normalizeAccountId,
+  resolveDefaultLineAccountId,
+  resolveExactLineGroupConfigKey,
+  resolveLineAccount,
+};
+
+export type { ChannelPlugin, OpenClawConfig, ResolvedLineAccount };
diff --git a/extensions/line/src/channel-shared.ts b/extensions/line/src/channel-shared.ts
index da2212db879..ef6435b9cee 100644
--- a/extensions/line/src/channel-shared.ts
+++ b/extensions/line/src/channel-shared.ts
@@ -1,11 +1,13 @@
 import { describeWebhookAccountSnapshot } from "openclaw/plugin-sdk/account-helpers";
-import type { ChannelPlugin } from "../api.js";
+import { hasLineCredentials, parseLineAllowFromId } from "./account-helpers.js";
 import {
+  DEFAULT_ACCOUNT_ID,
+  normalizeAccountId,
   resolveLineAccount,
+  type ChannelPlugin,
   type OpenClawConfig,
   type ResolvedLineAccount,
-} from "../runtime-api.js";
-import { hasLineCredentials, parseLineAllowFromId } from "./account-helpers.js";
+} from "./channel-api.js";
 import { lineConfigAdapter } from "./config-adapter.js";
 import { LineChannelConfigSchema } from "./config-schema.js";
 
@@ -56,5 +58,4 @@ export function isLineConfigured(cfg: OpenClawConfig, accountId: string): boolea
   return hasLineCredentials(resolveLineAccount({ cfg, accountId }));
 }
 
-export { DEFAULT_ACCOUNT_ID, normalizeAccountId } from "../runtime-api.js";
 export { parseLineAllowFromId };
diff --git a/extensions/line/src/channel.ts b/extensions/line/src/channel.ts
index 4a13c70da3c..33a9dd13a31 100644
--- a/extensions/line/src/channel.ts
+++ b/extensions/line/src/channel.ts
@@ -2,8 +2,8 @@ import { createPairingPrefixStripper } from "openclaw/plugin-sdk/channel-pairing
 import { createRestrictSendersChannelSecurity } from "openclaw/plugin-sdk/channel-policy";
 import { createChatChannelPlugin } from "openclaw/plugin-sdk/core";
 import { createEmptyChannelDirectoryAdapter } from "openclaw/plugin-sdk/directory-runtime";
-import { type ChannelPlugin, type ResolvedLineAccount } from "../api.js";
 import { resolveLineAccount } from "./accounts.js";
+import { type ChannelPlugin, type ResolvedLineAccount } from "./channel-api.js";
 import { lineChannelPluginCommon } from "./channel-shared.js";
 import { lineGatewayAdapter } from "./gateway.js";
 import { resolveLineGroupRequireMention } from "./group-policy.js";
diff --git a/extensions/line/src/config-adapter.ts b/extensions/line/src/config-adapter.ts
index 1b10989b45c..4bc8c4cb523 100644
--- a/extensions/line/src/config-adapter.ts
+++ b/extensions/line/src/config-adapter.ts
@@ -5,7 +5,7 @@ import {
   resolveLineAccount,
   type OpenClawConfig,
   type ResolvedLineAccount,
-} from "../runtime-api.js";
+} from "./channel-api.js";
 
 export function normalizeLineAllowFrom(entry: string): string {
   return entry.replace(/^line:(?:user:)?/i, "");
diff --git a/extensions/line/src/group-policy.ts b/extensions/line/src/group-policy.ts
index eaf30e04cf7..80855a5bf94 100644
--- a/extensions/line/src/group-policy.ts
+++ b/extensions/line/src/group-policy.ts
@@ -1,5 +1,5 @@
 import { resolveChannelGroupRequireMention } from "openclaw/plugin-sdk/channel-policy";
-import { resolveExactLineGroupConfigKey, type OpenClawConfig } from "../runtime-api.js";
+import { resolveExactLineGroupConfigKey, type OpenClawConfig } from "./channel-api.js";
 
 type LineGroupContext = {
   cfg: OpenClawConfig;