diff --git a/extensions/nostr/runtime-api.ts b/extensions/nostr/runtime-api.ts
index 3f3d64cc3bf..82b9e2f044e 100644
--- a/extensions/nostr/runtime-api.ts
+++ b/extensions/nostr/runtime-api.ts
@@ -1 +1,14 @@
-export * from "openclaw/plugin-sdk/nostr";
+// Private runtime barrel for the bundled Nostr extension.
+// Importing the public plugin-sdk/nostr surface here creates a cycle:
+// runtime-api -> plugin-sdk/nostr -> setup-api -> setup-surface -> types -> config-schema.
+// Keep this barrel limited to the symbols runtime code actually needs.
+
+export { buildChannelConfigSchema } from "../../src/channels/plugins/config-schema.js";
+export { formatPairingApproveHint } from "../../src/channels/plugins/helpers.js";
+export type { ChannelPlugin } from "../../src/channels/plugins/types.plugin.js";
+export { MarkdownConfigSchema } from "../../src/config/zod-schema.core.js";
+export { DEFAULT_ACCOUNT_ID } from "../../src/routing/session-key.js";
+export {
+  collectStatusIssuesFromLastError,
+  createDefaultChannelRuntimeState,
+} from "../../src/plugin-sdk/status-helpers.js";