diff --git a/scripts/check-plugin-sdk-exports.mjs b/scripts/check-plugin-sdk-exports.mjs
new file mode 100755
index 00000000000..51f58b8aa6b
--- /dev/null
+++ b/scripts/check-plugin-sdk-exports.mjs
@@ -0,0 +1,86 @@
+#!/usr/bin/env node
+
+/**
+ * Verifies that critical plugin-sdk exports are present in the compiled dist output.
+ * Regression guard for #27569 where isDangerousNameMatchingEnabled was missing
+ * from the compiled output, breaking channel extension plugins at runtime.
+ *
+ * Run after `pnpm build` to catch missing exports before release.
+ */
+
+import { readFileSync, existsSync } from "node:fs";
+import { resolve, dirname } from "node:path";
+import { fileURLToPath } from "node:url";
+
+const __dirname = dirname(fileURLToPath(import.meta.url));
+const distFile = resolve(__dirname, "..", "dist", "plugin-sdk", "index.js");
+
+if (!existsSync(distFile)) {
+  console.error("ERROR: dist/plugin-sdk/index.js not found. Run `pnpm build` first.");
+  process.exit(1);
+}
+
+const content = readFileSync(distFile, "utf-8");
+
+// Extract the final export statement from the compiled output.
+// tsdown/rolldown emits a single `export { ... }` at the end of the file.
+const exportMatch = content.match(/export\s*\{([^}]+)\}\s*;?\s*$/);
+if (!exportMatch) {
+  console.error("ERROR: Could not find export statement in dist/plugin-sdk/index.js");
+  process.exit(1);
+}
+
+const exportedNames = exportMatch[1]
+  .split(",")
+  .map((s) => {
+    // Handle `foo as bar` aliases — the exported name is the `bar` part
+    const parts = s.trim().split(/\s+as\s+/);
+    return (parts[parts.length - 1] || "").trim();
+  })
+  .filter(Boolean);
+
+const exportSet = new Set(exportedNames);
+
+// Critical functions that channel extension plugins import from openclaw/plugin-sdk.
+// If any of these are missing, plugins will fail at runtime with:
+//   TypeError: (0 , _pluginSdk.<name>) is not a function
+const requiredExports = [
+  "isDangerousNameMatchingEnabled",
+  "createAccountListHelpers",
+  "buildAgentMediaPayload",
+  "createReplyPrefixOptions",
+  "createTypingCallbacks",
+  "logInboundDrop",
+  "logTypingFailure",
+  "buildPendingHistoryContextFromMap",
+  "clearHistoryEntriesIfEnabled",
+  "recordPendingHistoryEntryIfEnabled",
+  "resolveControlCommandGate",
+  "resolveDmGroupAccessWithLists",
+  "resolveAllowlistProviderRuntimeGroupPolicy",
+  "resolveDefaultGroupPolicy",
+  "resolveChannelMediaMaxBytes",
+  "warnMissingProviderGroupPolicyFallbackOnce",
+  "emptyPluginConfigSchema",
+  "normalizePluginHttpPath",
+  "registerPluginHttpRoute",
+  "DEFAULT_ACCOUNT_ID",
+  "DEFAULT_GROUP_HISTORY_LIMIT",
+];
+
+let missing = 0;
+for (const name of requiredExports) {
+  if (!exportSet.has(name)) {
+    console.error(`MISSING EXPORT: ${name}`);
+    missing += 1;
+  }
+}
+
+if (missing > 0) {
+  console.error(`\nERROR: ${missing} required export(s) missing from dist/plugin-sdk/index.js.`);
+  console.error("This will break channel extension plugins at runtime.");
+  console.error("Check src/plugin-sdk/index.ts and rebuild.");
+  process.exit(1);
+}
+
+console.log(`OK: All ${requiredExports.length} required plugin-sdk exports verified.`);
diff --git a/scripts/release-check.ts b/scripts/release-check.ts
index 9016382aa09..4d1efd31361 100755
--- a/scripts/release-check.ts
+++ b/scripts/release-check.ts
@@ -164,6 +164,59 @@ function checkAppcastSparkleVersions() {
     console.error("release-check: appcast sparkle version validation failed:");
     for (const error of errors) {
       console.error(`  - ${error}`);
+
+// Critical functions that channel extension plugins import from openclaw/plugin-sdk.
+// If any are missing from the compiled output, plugins crash at runtime (#27569).
+const requiredPluginSdkExports = [
+  "isDangerousNameMatchingEnabled",
+  "createAccountListHelpers",
+  "buildAgentMediaPayload",
+  "createReplyPrefixOptions",
+  "createTypingCallbacks",
+  "logInboundDrop",
+  "logTypingFailure",
+  "resolveControlCommandGate",
+  "resolveDmGroupAccessWithLists",
+  "resolveAllowlistProviderRuntimeGroupPolicy",
+  "resolveDefaultGroupPolicy",
+  "resolveChannelMediaMaxBytes",
+  "emptyPluginConfigSchema",
+  "normalizePluginHttpPath",
+  "registerPluginHttpRoute",
+  "DEFAULT_ACCOUNT_ID",
+  "DEFAULT_GROUP_HISTORY_LIMIT",
+];
+
+function checkPluginSdkExports() {
+  const distPath = resolve("dist", "plugin-sdk", "index.js");
+  let content: string;
+  try {
+    content = readFileSync(distPath, "utf8");
+  } catch {
+    console.error("release-check: dist/plugin-sdk/index.js not found (build missing?).");
+    process.exit(1);
+    return;
+  }
+
+  const exportMatch = content.match(/export\s*\{([^}]+)\}\s*;?\s*$/);
+  if (!exportMatch) {
+    console.error("release-check: could not find export statement in dist/plugin-sdk/index.js.");
+    process.exit(1);
+    return;
+  }
+
+  const exportedNames = new Set(
+    exportMatch[1].split(",").map((s) => {
+      const parts = s.trim().split(/\s+as\s+/);
+      return (parts[parts.length - 1] || "").trim();
+    }),
+  );
+
+  const missingExports = requiredPluginSdkExports.filter((name) => !exportedNames.has(name));
+  if (missingExports.length > 0) {
+    console.error("release-check: missing critical plugin-sdk exports (#27569):");
+    for (const name of missingExports) {
+      console.error(`  - ${name}`);
     }
     process.exit(1);
   }
@@ -172,6 +225,7 @@ function checkAppcastSparkleVersions() {
 function main() {
   checkPluginVersions();
   checkAppcastSparkleVersions();
+  checkPluginSdkExports();
 
   const results = runPackDry();
   const files = results.flatMap((entry) => entry.files ?? []);
diff --git a/src/plugin-sdk/index.test.ts b/src/plugin-sdk/index.test.ts
index ae085b00d9c..24cb7bb67e4 100644
--- a/src/plugin-sdk/index.test.ts
+++ b/src/plugin-sdk/index.test.ts
@@ -46,4 +46,62 @@ describe("plugin-sdk exports", () => {
       expect(Object.prototype.hasOwnProperty.call(sdk, key)).toBe(false);
     }
   });
+
+  // Verify critical functions that extensions depend on are exported and callable.
+  // Regression guard for #27569 where isDangerousNameMatchingEnabled was missing
+  // from the compiled output, breaking mattermost/googlechat/msteams/irc plugins.
+  it("exports critical functions used by channel extensions", () => {
+    const requiredFunctions = [
+      "isDangerousNameMatchingEnabled",
+      "createAccountListHelpers",
+      "buildAgentMediaPayload",
+      "createReplyPrefixOptions",
+      "createTypingCallbacks",
+      "logInboundDrop",
+      "logTypingFailure",
+      "buildPendingHistoryContextFromMap",
+      "clearHistoryEntriesIfEnabled",
+      "recordPendingHistoryEntryIfEnabled",
+      "resolveControlCommandGate",
+      "resolveDmGroupAccessWithLists",
+      "resolveAllowlistProviderRuntimeGroupPolicy",
+      "resolveDefaultGroupPolicy",
+      "resolveChannelMediaMaxBytes",
+      "warnMissingProviderGroupPolicyFallbackOnce",
+      "createDedupeCache",
+      "formatInboundFromLabel",
+      "resolveRuntimeGroupPolicy",
+      "emptyPluginConfigSchema",
+      "normalizePluginHttpPath",
+      "registerPluginHttpRoute",
+      "buildBaseAccountStatusSnapshot",
+      "buildBaseChannelStatusSummary",
+      "buildTokenChannelStatusSummary",
+      "collectStatusIssuesFromLastError",
+      "createDefaultChannelRuntimeState",
+      "resolveChannelEntryMatch",
+      "resolveChannelEntryMatchWithFallback",
+      "normalizeChannelSlug",
+      "buildChannelKeyCandidates",
+    ];
+
+    for (const key of requiredFunctions) {
+      expect(sdk).toHaveProperty(key);
+      expect(typeof (sdk as Record<string, unknown>)[key]).toBe("function");
+    }
+  });
+
+  // Verify critical constants that extensions depend on are exported.
+  it("exports critical constants used by channel extensions", () => {
+    const requiredConstants = [
+      "DEFAULT_GROUP_HISTORY_LIMIT",
+      "DEFAULT_ACCOUNT_ID",
+      "SILENT_REPLY_TOKEN",
+      "PAIRING_APPROVED_MESSAGE",
+    ];
+
+    for (const key of requiredConstants) {
+      expect(sdk).toHaveProperty(key);
+    }
+  });
 });