diff --git a/extensions/line/index.test.ts b/extensions/line/index.test.ts
new file mode 100644
index 00000000000..7687e4a6f2c
--- /dev/null
+++ b/extensions/line/index.test.ts
@@ -0,0 +1,24 @@
+import path from "node:path";
+import { createJiti } from "jiti";
+import { describe, expect, it } from "vitest";
+import {
+  buildPluginLoaderJitiOptions,
+  resolvePluginSdkScopedAliasMap,
+} from "../../src/plugins/sdk-alias.ts";
+
+describe("line runtime api", () => {
+  it("loads the line runtime api through Jiti", () => {
+    const runtimeApiPath = path.join(process.cwd(), "extensions", "line", "runtime-api.ts");
+    const jiti = createJiti(import.meta.url, {
+      ...buildPluginLoaderJitiOptions(
+        resolvePluginSdkScopedAliasMap({ modulePath: runtimeApiPath }),
+      ),
+      tryNative: false,
+    });
+
+    expect(jiti(runtimeApiPath)).toMatchObject({
+      resolveLineAccount: expect.any(Function),
+      formatDocsLink: expect.any(Function),
+    });
+  });
+});
diff --git a/extensions/line/runtime-api.ts b/extensions/line/runtime-api.ts
index 53f1be0c51c..175c145b61f 100644
--- a/extensions/line/runtime-api.ts
+++ b/extensions/line/runtime-api.ts
@@ -1,12 +1,44 @@
 // Private runtime barrel for the bundled LINE extension.
 // Keep this barrel thin and aligned with the local extension surface.
+// Do not re-export ../../src/plugin-sdk/line here: that public barrel also
+// re-exports setup-api, which creates a cycle for local line imports.
 
-export * from "../../src/plugin-sdk/line.js";
-export { resolveExactLineGroupConfigKey } from "../../src/plugin-sdk/line-core.js";
+export type {
+  ChannelAccountSnapshot,
+  ChannelGatewayContext,
+  ChannelStatusIssue,
+  ChannelPlugin,
+  OpenClawConfig,
+  ReplyPayload,
+  OpenClawPluginApi,
+  PluginRuntime,
+  LineChannelData,
+  LineConfig,
+  ResolvedLineAccount,
+  CardAction,
+  ListItem,
+  ChannelSetupDmPolicy,
+  ChannelSetupWizard,
+} from "../../src/plugin-sdk/line-core.js";
 export {
+  DEFAULT_ACCOUNT_ID,
+  buildChannelConfigSchema,
+  buildComputedAccountStatusSnapshot,
+  buildTokenChannelStatusSummary,
+  clearAccountEntryFields,
+  createActionCard,
+  createImageCard,
+  createInfoCard,
+  createListCard,
+  createReceiptCard,
   formatDocsLink,
+  LineConfigSchema,
+  listLineAccountIds,
+  normalizeAccountId,
+  processLineMessage,
+  resolveDefaultLineAccountId,
+  resolveLineAccount,
+  resolveExactLineGroupConfigKey,
   setSetupChannelEnabled,
   splitSetupEntries,
-  type ChannelSetupDmPolicy,
-  type ChannelSetupWizard,
 } from "../../src/plugin-sdk/line-core.js";
diff --git a/extensions/line/src/channel.logout.test.ts b/extensions/line/src/channel.logout.test.ts
index 0b3dd9a9517..f07fddfb87e 100644
--- a/extensions/line/src/channel.logout.test.ts
+++ b/extensions/line/src/channel.logout.test.ts
@@ -1,6 +1,8 @@
 import { beforeEach, describe, expect, it, vi } from "vitest";
+import type { OpenClawConfig } from "../../../src/config/config.js";
+import type { ResolvedLineAccount } from "../../../src/line/types.js";
+import type { PluginRuntime } from "../../../src/plugins/runtime/types.js";
 import { createRuntimeEnv } from "../../../test/helpers/extensions/runtime-env.js";
-import type { OpenClawConfig, PluginRuntime, ResolvedLineAccount } from "../api.js";
 import { linePlugin } from "./channel.js";
 import { setLineRuntime } from "./runtime.js";
 
diff --git a/extensions/line/src/channel.sendPayload.test.ts b/extensions/line/src/channel.sendPayload.test.ts
index 470b582dfc6..4a80e61dc6b 100644
--- a/extensions/line/src/channel.sendPayload.test.ts
+++ b/extensions/line/src/channel.sendPayload.test.ts
@@ -1,5 +1,6 @@
 import { describe, expect, it, vi } from "vitest";
-import type { OpenClawConfig, PluginRuntime } from "../api.js";
+import type { OpenClawConfig } from "../../../src/config/config.js";
+import type { PluginRuntime } from "../../../src/plugins/runtime/types.js";
 import { linePlugin } from "./channel.js";
 import { setLineRuntime } from "./runtime.js";
 
diff --git a/extensions/line/src/channel.startup.test.ts b/extensions/line/src/channel.startup.test.ts
index 000b94ee471..73e82965f47 100644
--- a/extensions/line/src/channel.startup.test.ts
+++ b/extensions/line/src/channel.startup.test.ts
@@ -1,12 +1,12 @@
 import { describe, expect, it, vi } from "vitest";
-import { createRuntimeEnv } from "../../../test/helpers/extensions/runtime-env.js";
 import type {
-  ChannelGatewayContext,
   ChannelAccountSnapshot,
-  OpenClawConfig,
-  PluginRuntime,
-  ResolvedLineAccount,
-} from "../api.js";
+  ChannelGatewayContext,
+} from "../../../src/channels/plugins/types.js";
+import type { OpenClawConfig } from "../../../src/config/config.js";
+import type { ResolvedLineAccount } from "../../../src/line/types.js";
+import type { PluginRuntime } from "../../../src/plugins/runtime/types.js";
+import { createRuntimeEnv } from "../../../test/helpers/extensions/runtime-env.js";
 import { linePlugin } from "./channel.js";
 import { setLineRuntime } from "./runtime.js";
 
diff --git a/extensions/line/src/setup-surface.test.ts b/extensions/line/src/setup-surface.test.ts
index b613a16bba4..d5303ef0842 100644
--- a/extensions/line/src/setup-surface.test.ts
+++ b/extensions/line/src/setup-surface.test.ts
@@ -1,5 +1,6 @@
 import { describe, expect, it, vi } from "vitest";
 import { buildChannelSetupWizardAdapterFromSetupWizard } from "../../../src/channels/plugins/setup-wizard.js";
+import type { OpenClawConfig } from "../../../src/config/config.js";
 import {
   listLineAccountIds,
   resolveDefaultLineAccountId,
@@ -10,7 +11,6 @@ import {
   createTestWizardPrompter,
   type WizardPrompter,
 } from "../../../test/helpers/extensions/setup-wizard.js";
-import type { OpenClawConfig } from "../api.js";
 import { lineSetupAdapter, lineSetupWizard } from "./setup-surface.js";
 
 const lineConfigureAdapter = buildChannelSetupWizardAdapterFromSetupWizard({
diff --git a/src/plugin-sdk/line-core.ts b/src/plugin-sdk/line-core.ts
index 04b2950a50d..bb2adcc1181 100644
--- a/src/plugin-sdk/line-core.ts
+++ b/src/plugin-sdk/line-core.ts
@@ -1,5 +1,14 @@
+export type {
+  ChannelAccountSnapshot,
+  ChannelGatewayContext,
+  ChannelStatusIssue,
+} from "../channels/plugins/types.js";
+export type { ChannelPlugin } from "../channels/plugins/types.plugin.js";
 export type { OpenClawConfig } from "../config/config.js";
-export type { LineConfig } from "../line/types.js";
+export type { ReplyPayload } from "../auto-reply/types.js";
+export type { OpenClawPluginApi, PluginRuntime } from "./channel-plugin-common.js";
+export type { LineChannelData, LineConfig, ResolvedLineAccount } from "../line/types.js";
+export type { CardAction, ListItem } from "../line/flex-templates.js";
 export {
   createTopLevelChannelDmPolicy,
   DEFAULT_ACCOUNT_ID,
@@ -9,12 +18,25 @@ export {
   splitSetupEntries,
 } from "./setup.js";
 export type { ChannelSetupAdapter, ChannelSetupDmPolicy, ChannelSetupWizard } from "./setup.js";
+export { buildChannelConfigSchema } from "./channel-plugin-common.js";
+export {
+  buildComputedAccountStatusSnapshot,
+  buildTokenChannelStatusSummary,
+} from "./status-helpers.js";
+export { clearAccountEntryFields } from "../channels/plugins/config-helpers.js";
 export {
   listLineAccountIds,
   normalizeAccountId,
   resolveDefaultLineAccountId,
   resolveLineAccount,
 } from "../line/accounts.js";
+export {
+  createActionCard,
+  createImageCard,
+  createInfoCard,
+  createListCard,
+  createReceiptCard,
+} from "../line/flex-templates.js";
 export { resolveExactLineGroupConfigKey } from "../line/group-keys.js";
-export type { ResolvedLineAccount } from "../line/types.js";
 export { LineConfigSchema } from "../line/config-schema.js";
+export { processLineMessage } from "../line/markdown-to-line.js";
diff --git a/src/plugin-sdk/runtime-api-guardrails.test.ts b/src/plugin-sdk/runtime-api-guardrails.test.ts
index 78a39d7ccb3..de49bb9285c 100644
--- a/src/plugin-sdk/runtime-api-guardrails.test.ts
+++ b/src/plugin-sdk/runtime-api-guardrails.test.ts
@@ -35,6 +35,10 @@ const RUNTIME_API_EXPORT_GUARDS: Record<string, readonly string[]> = {
     'export { sendMessageIMessage } from "./src/send.js";',
   ],
   "extensions/googlechat/runtime-api.ts": ['export * from "../../src/plugin-sdk/googlechat.js";'],
+  "extensions/line/runtime-api.ts": [
+    'export type { ChannelAccountSnapshot, ChannelGatewayContext, ChannelStatusIssue, ChannelPlugin, OpenClawConfig, ReplyPayload, OpenClawPluginApi, PluginRuntime, LineChannelData, LineConfig, ResolvedLineAccount, CardAction, ListItem, ChannelSetupDmPolicy, ChannelSetupWizard } from "../../src/plugin-sdk/line-core.js";',
+    'export { DEFAULT_ACCOUNT_ID, buildChannelConfigSchema, buildComputedAccountStatusSnapshot, buildTokenChannelStatusSummary, clearAccountEntryFields, createActionCard, createImageCard, createInfoCard, createListCard, createReceiptCard, formatDocsLink, LineConfigSchema, listLineAccountIds, normalizeAccountId, processLineMessage, resolveDefaultLineAccountId, resolveLineAccount, resolveExactLineGroupConfigKey, setSetupChannelEnabled, splitSetupEntries } from "../../src/plugin-sdk/line-core.js";',
+  ],
   "extensions/matrix/runtime-api.ts": [
     'export * from "./src/auth-precedence.js";',
     'export * from "./helper-api.js";',