diff --git a/scripts/check-plugin-sdk-exports.mjs b/scripts/check-plugin-sdk-exports.mjs
index 60c89056ca0..90d784235f5 100755
--- a/scripts/check-plugin-sdk-exports.mjs
+++ b/scripts/check-plugin-sdk-exports.mjs
@@ -42,7 +42,7 @@ const exportedNames = exportMatch[1]
 
 const exportSet = new Set(exportedNames);
 
-const requiredRuntimeShimEntries = ["root-alias.cjs"];
+const requiredRuntimeShimEntries = ["compat.js", "root-alias.cjs"];
 
 // Critical functions that channel extension plugins import from openclaw/plugin-sdk.
 // If any of these are missing, plugins will fail at runtime with:
@@ -65,6 +65,7 @@ const requiredExports = [
   "resolveChannelMediaMaxBytes",
   "warnMissingProviderGroupPolicyFallbackOnce",
   "emptyPluginConfigSchema",
+  "onDiagnosticEvent",
   "normalizePluginHttpPath",
   "registerPluginHttpRoute",
   "DEFAULT_ACCOUNT_ID",
diff --git a/scripts/release-check.ts b/scripts/release-check.ts
index 72d729cc1cd..f7f36373a49 100755
--- a/scripts/release-check.ts
+++ b/scripts/release-check.ts
@@ -21,6 +21,7 @@ const requiredPathGroups = [
   ["dist/index.js", "dist/index.mjs"],
   ["dist/entry.js", "dist/entry.mjs"],
   ...listPluginSdkDistArtifacts(),
+  "dist/plugin-sdk/compat.js",
   "dist/plugin-sdk/root-alias.cjs",
   "dist/build-info.json",
 ];
@@ -228,6 +229,7 @@ const requiredPluginSdkExports = [
   "resolveChannelMediaMaxBytes",
   "warnMissingProviderGroupPolicyFallbackOnce",
   "emptyPluginConfigSchema",
+  "onDiagnosticEvent",
   "normalizePluginHttpPath",
   "registerPluginHttpRoute",
   "DEFAULT_ACCOUNT_ID",
diff --git a/src/infra/tsdown-config.test.ts b/src/infra/tsdown-config.test.ts
index 94332c5b307..c47bbcb2192 100644
--- a/src/infra/tsdown-config.test.ts
+++ b/src/infra/tsdown-config.test.ts
@@ -36,6 +36,7 @@ describe("tsdown config", () => {
       expect.arrayContaining([
         "index",
         "plugins/runtime/index",
+        "plugin-sdk/compat",
         "plugin-sdk/index",
         "extensions/openai/index",
         "bundled/boot-md/handler",
diff --git a/src/plugin-sdk/compat.ts b/src/plugin-sdk/compat.ts
index 5e2bcd11f58..99e2066633c 100644
--- a/src/plugin-sdk/compat.ts
+++ b/src/plugin-sdk/compat.ts
@@ -20,6 +20,8 @@ if (shouldWarnCompatImport) {
 export { emptyPluginConfigSchema } from "../plugins/config-schema.js";
 export { resolveControlCommandGate } from "../channels/command-gating.js";
 export { delegateCompactionToRuntime } from "../context-engine/delegate.js";
+export type { DiagnosticEventPayload } from "../infra/diagnostic-events.js";
+export { onDiagnosticEvent } from "../infra/diagnostic-events.js";
 
 export { createAccountStatusSink } from "./channel-lifecycle.js";
 export { createPluginRuntimeStore } from "./runtime-store.js";
diff --git a/src/plugin-sdk/index.test.ts b/src/plugin-sdk/index.test.ts
index 30040416729..db54ebbd1ff 100644
--- a/src/plugin-sdk/index.test.ts
+++ b/src/plugin-sdk/index.test.ts
@@ -50,9 +50,11 @@ describe("plugin-sdk exports", () => {
   it("keeps the root runtime surface intentionally small", () => {
     expect(typeof sdk.emptyPluginConfigSchema).toBe("function");
     expect(typeof sdk.delegateCompactionToRuntime).toBe("function");
+    expect(typeof sdk.onDiagnosticEvent).toBe("function");
     expect(Object.prototype.hasOwnProperty.call(sdk, "resolveControlCommandGate")).toBe(false);
     expect(Object.prototype.hasOwnProperty.call(sdk, "buildAgentSessionKey")).toBe(false);
     expect(Object.prototype.hasOwnProperty.call(sdk, "isDangerousNameMatchingEnabled")).toBe(false);
+    expect(Object.prototype.hasOwnProperty.call(sdk, "emitDiagnosticEvent")).toBe(false);
   });
 
   it("keeps package.json plugin-sdk exports synced with the manifest", async () => {
diff --git a/src/plugin-sdk/index.ts b/src/plugin-sdk/index.ts
index 5bb67920734..20f8a34672a 100644
--- a/src/plugin-sdk/index.ts
+++ b/src/plugin-sdk/index.ts
@@ -64,7 +64,9 @@ export type { HookEntry } from "../hooks/types.js";
 export type { ReplyPayload } from "../auto-reply/types.js";
 export type { WizardPrompter } from "../wizard/prompts.js";
 export type { ContextEngineFactory } from "../context-engine/registry.js";
+export type { DiagnosticEventPayload } from "../infra/diagnostic-events.js";
 
 export { emptyPluginConfigSchema } from "../plugins/config-schema.js";
 export { registerContextEngine } from "../context-engine/registry.js";
 export { delegateCompactionToRuntime } from "../context-engine/delegate.js";
+export { onDiagnosticEvent } from "../infra/diagnostic-events.js";
diff --git a/src/plugin-sdk/root-alias.cjs b/src/plugin-sdk/root-alias.cjs
index 23e583f8c4d..669586bb80c 100644
--- a/src/plugin-sdk/root-alias.cjs
+++ b/src/plugin-sdk/root-alias.cjs
@@ -5,6 +5,7 @@ const fs = require("node:fs");
 
 let monolithicSdk = null;
 const jitiLoaders = new Map();
+const pluginSdkSubpathsCache = new Map();
 
 function emptyPluginConfigSchema() {
   function error(message) {
@@ -61,6 +62,49 @@ function resolveControlCommandGate(params) {
   return { commandAuthorized, shouldBlock };
 }
 
+function getPackageRoot() {
+  return path.resolve(__dirname, "..", "..");
+}
+
+function listPluginSdkExportedSubpaths() {
+  const packageRoot = getPackageRoot();
+  if (pluginSdkSubpathsCache.has(packageRoot)) {
+    return pluginSdkSubpathsCache.get(packageRoot);
+  }
+
+  let subpaths = [];
+  try {
+    const packageJsonPath = path.join(packageRoot, "package.json");
+    const packageJson = JSON.parse(fs.readFileSync(packageJsonPath, "utf8"));
+    subpaths = Object.keys(packageJson.exports ?? {})
+      .filter((key) => key.startsWith("./plugin-sdk/"))
+      .map((key) => key.slice("./plugin-sdk/".length));
+  } catch {
+    subpaths = [];
+  }
+
+  pluginSdkSubpathsCache.set(packageRoot, subpaths);
+  return subpaths;
+}
+
+function buildPluginSdkAliasMap(useDist) {
+  const packageRoot = getPackageRoot();
+  const pluginSdkDir = path.join(packageRoot, useDist ? "dist" : "src", "plugin-sdk");
+  const ext = useDist ? ".js" : ".ts";
+  const aliasMap = {
+    "openclaw/plugin-sdk": __filename,
+  };
+
+  for (const subpath of listPluginSdkExportedSubpaths()) {
+    const candidate = path.join(pluginSdkDir, `${subpath}${ext}`);
+    if (fs.existsSync(candidate)) {
+      aliasMap[`openclaw/plugin-sdk/${subpath}`] = candidate;
+    }
+  }
+
+  return aliasMap;
+}
+
 function getJiti(tryNative) {
   if (jitiLoaders.has(tryNative)) {
     return jitiLoaders.get(tryNative);
@@ -68,6 +112,7 @@ function getJiti(tryNative) {
 
   const { createJiti } = require("jiti");
   const jitiLoader = createJiti(__filename, {
+    alias: buildPluginSdkAliasMap(tryNative),
     interopDefault: true,
     // Prefer Node's native sync ESM loader for built dist/plugin-sdk/*.js files
     // so local plugins do not create a second transpiled OpenClaw core graph.
diff --git a/src/plugin-sdk/root-alias.test.ts b/src/plugin-sdk/root-alias.test.ts
index 83937c34b44..48ae4a7b43c 100644
--- a/src/plugin-sdk/root-alias.test.ts
+++ b/src/plugin-sdk/root-alias.test.ts
@@ -48,6 +48,12 @@ function loadRootAliasWithStubs(options?: {
     }
     if (id === "node:fs") {
       return {
+        readFileSync: () =>
+          JSON.stringify({
+            exports: {
+              "./plugin-sdk/group-access": { default: "./dist/plugin-sdk/group-access.js" },
+            },
+          }),
         existsSync: () => options?.distExists ?? false,
       };
     }
@@ -164,8 +170,23 @@ describe("plugin-sdk root alias", () => {
     expect("delegateCompactionToRuntime" in lazyRootSdk).toBe(true);
   });
 
+  it("forwards onDiagnosticEvent through the compat-backed root alias", () => {
+    const onDiagnosticEvent = () => () => undefined;
+    const lazyModule = loadRootAliasWithStubs({
+      monolithicExports: {
+        onDiagnosticEvent,
+      },
+    });
+    const lazyRootSdk = lazyModule.moduleExports;
+
+    expect(typeof lazyRootSdk.onDiagnosticEvent).toBe("function");
+    expect(lazyRootSdk.onDiagnosticEvent).toBe(onDiagnosticEvent);
+    expect("onDiagnosticEvent" in lazyRootSdk).toBe(true);
+  });
+
   it("loads legacy root exports through the merged root wrapper", { timeout: 240_000 }, () => {
     expect(typeof rootSdk.resolveControlCommandGate).toBe("function");
+    expect(typeof rootSdk.onDiagnosticEvent).toBe("function");
     expect(typeof rootSdk.default).toBe("object");
     expect(rootSdk.default).toBe(rootSdk);
     expect(rootSdk.__esModule).toBe(true);
@@ -173,9 +194,12 @@ describe("plugin-sdk root alias", () => {
 
   it("preserves reflection semantics for lazily resolved exports", { timeout: 240_000 }, () => {
     expect("resolveControlCommandGate" in rootSdk).toBe(true);
+    expect("onDiagnosticEvent" in rootSdk).toBe(true);
     const keys = Object.keys(rootSdk);
     expect(keys).toContain("resolveControlCommandGate");
+    expect(keys).toContain("onDiagnosticEvent");
     const descriptor = Object.getOwnPropertyDescriptor(rootSdk, "resolveControlCommandGate");
     expect(descriptor).toBeDefined();
+    expect(Object.getOwnPropertyDescriptor(rootSdk, "onDiagnosticEvent")).toBeDefined();
   });
 });
diff --git a/tsdown.config.ts b/tsdown.config.ts
index 746c6e883bc..98dd9e3d341 100644
--- a/tsdown.config.ts
+++ b/tsdown.config.ts
@@ -186,6 +186,8 @@ const coreDistEntries = buildCoreDistEntries();
 function buildUnifiedDistEntries(): Record<string, string> {
   return {
     ...coreDistEntries,
+    // Internal compat artifact for the root-alias.cjs lazy loader.
+    "plugin-sdk/compat": "src/plugin-sdk/compat.ts",
     ...Object.fromEntries(
       Object.entries(buildPluginSdkEntrySources()).map(([entry, source]) => [
         `plugin-sdk/${entry}`,