diff --git a/extensions/discord/package.json b/extensions/discord/package.json
index a1e89867758..efd655226ca 100644
--- a/extensions/discord/package.json
+++ b/extensions/discord/package.json
@@ -68,6 +68,9 @@
     "build": {
       "openclawVersion": "2026.5.1-beta.1"
     },
+    "bundle": {
+      "includeInCore": true
+    },
     "release": {
       "publishToClawHub": true,
       "publishToNpm": true
diff --git a/scripts/e2e/lib/kitchen-sink-plugin/assertions.mjs b/scripts/e2e/lib/kitchen-sink-plugin/assertions.mjs
index 4d9ff06da4e..5a010330981 100644
--- a/scripts/e2e/lib/kitchen-sink-plugin/assertions.mjs
+++ b/scripts/e2e/lib/kitchen-sink-plugin/assertions.mjs
@@ -148,7 +148,6 @@ const INVALID_PROBE_DIAGNOSTIC_SURFACE_MODES = new Set(["full", "conformance", "
 
 function assertExpectedDiagnostics(surfaceMode, errorMessages) {
   const expectedErrorMessages = new Set([
-    'agent harness "kitchen-sink-agent-harness" registration missing required runtime methods',
     'channel "kitchen-sink-channel-probe" registration missing required config helpers',
     "cli registration missing explicit commands metadata",
     "only bundled plugins can register Codex app-server extension factories",
diff --git a/src/infra/package-dist-inventory.test.ts b/src/infra/package-dist-inventory.test.ts
index e810e35fa34..57f699d1acb 100644
--- a/src/infra/package-dist-inventory.test.ts
+++ b/src/infra/package-dist-inventory.test.ts
@@ -250,6 +250,37 @@ describe("package dist inventory", () => {
     });
   });
 
+  it("keeps publishable core-package runtime plugin dist trees in the inventory", async () => {
+    await withTempDir({ prefix: "openclaw-dist-inventory-core-runtime-" }, async (packageRoot) => {
+      const coreRuntime = path.join(packageRoot, "dist", "extensions", "core-chat", "index.js");
+      const corePackageJson = path.join(packageRoot, "extensions", "core-chat", "package.json");
+
+      await fs.mkdir(path.dirname(coreRuntime), { recursive: true });
+      await fs.mkdir(path.dirname(corePackageJson), { recursive: true });
+      await fs.writeFile(coreRuntime, "export {};\n", "utf8");
+      await fs.writeFile(
+        corePackageJson,
+        JSON.stringify({
+          name: "@openclaw/core-chat",
+          openclaw: {
+            bundle: {
+              includeInCore: true,
+            },
+            release: {
+              publishToClawHub: true,
+              publishToNpm: true,
+            },
+          },
+        }),
+        "utf8",
+      );
+
+      await expect(writePackageDistInventory(packageRoot)).resolves.toEqual([
+        "dist/extensions/core-chat/index.js",
+      ]);
+    });
+  });
+
   it("reports runtime-created install staging dirs during installed dist verification", async () => {
     await withTempDir({ prefix: "openclaw-dist-inventory-stage-" }, async (packageRoot) => {
       const realFile = path.join(packageRoot, "dist", "real-AbC123.js");
diff --git a/src/infra/package-dist-inventory.ts b/src/infra/package-dist-inventory.ts
index ef0c0d3b2e9..432788f9e70 100644
--- a/src/infra/package-dist-inventory.ts
+++ b/src/infra/package-dist-inventory.ts
@@ -104,6 +104,14 @@ function isPublishableExternalizedBundledManifest(value: unknown): boolean {
   if (!release || typeof release !== "object") {
     return false;
   }
+  const bundle = (openclaw as { bundle?: unknown }).bundle;
+  if (
+    bundle &&
+    typeof bundle === "object" &&
+    (bundle as { includeInCore?: unknown }).includeInCore === true
+  ) {
+    return false;
+  }
   const typedRelease = release as { publishToClawHub?: unknown; publishToNpm?: unknown };
   return typedRelease.publishToNpm === true || typedRelease.publishToClawHub === true;
 }