diff --git a/extensions/line/runtime-api.ts b/extensions/line/runtime-api.ts
index af6082ba155..e439c4020b0 100644
--- a/extensions/line/runtime-api.ts
+++ b/extensions/line/runtime-api.ts
@@ -1 +1,19 @@
-export * from "openclaw/plugin-sdk/line-core";
+// Private runtime barrel for the bundled LINE extension.
+// Keep this barrel thin and aligned with the local extension surface.
+
+export type { OpenClawConfig } from "openclaw/plugin-sdk/line-core";
+export type { ChannelSetupDmPolicy, ChannelSetupWizard } from "openclaw/plugin-sdk/channel-setup";
+export type { LineConfig, ResolvedLineAccount } from "openclaw/plugin-sdk/line-core";
+export { buildChannelConfigSchema } from "openclaw/plugin-sdk/channel-config-schema";
+export {
+  DEFAULT_ACCOUNT_ID,
+  formatDocsLink,
+  LineConfigSchema,
+  listLineAccountIds,
+  normalizeAccountId,
+  resolveDefaultLineAccountId,
+  resolveExactLineGroupConfigKey,
+  resolveLineAccount,
+  setSetupChannelEnabled,
+  splitSetupEntries,
+} from "openclaw/plugin-sdk/line-core";