diff --git a/scripts/release-check.ts b/scripts/release-check.ts
index 2a54ae754..9a22467d6 100755
--- a/scripts/release-check.ts
+++ b/scripts/release-check.ts
@@ -1,6 +1,8 @@
 #!/usr/bin/env bun
 
 import { execSync } from "node:child_process";
+import { readdirSync, readFileSync } from "node:fs";
+import { join, resolve } from "node:path";
 
 type PackFile = { path: string };
 type PackResult = { files?: PackFile[] };
@@ -13,6 +15,11 @@ const requiredPaths = [
 ];
 const forbiddenPrefixes = ["dist/Clawdbot.app/"];
 
+type PackageJson = {
+  name?: string;
+  version?: string;
+};
+
 function runPackDry(): PackResult[] {
   const raw = execSync("npm pack --dry-run --json", {
     encoding: "utf8",
@@ -21,7 +28,53 @@ function runPackDry(): PackResult[] {
   return JSON.parse(raw) as PackResult[];
 }
 
+function checkPluginVersions() {
+  const rootPackagePath = resolve("package.json");
+  const rootPackage = JSON.parse(readFileSync(rootPackagePath, "utf8")) as PackageJson;
+  const targetVersion = rootPackage.version;
+
+  if (!targetVersion) {
+    console.error("release-check: root package.json missing version.");
+    process.exit(1);
+  }
+
+  const extensionsDir = resolve("extensions");
+  const entries = readdirSync(extensionsDir, { withFileTypes: true }).filter((entry) =>
+    entry.isDirectory(),
+  );
+
+  const mismatches: string[] = [];
+
+  for (const entry of entries) {
+    const packagePath = join(extensionsDir, entry.name, "package.json");
+    let pkg: PackageJson;
+    try {
+      pkg = JSON.parse(readFileSync(packagePath, "utf8")) as PackageJson;
+    } catch {
+      continue;
+    }
+
+    if (!pkg.name || !pkg.version) {
+      continue;
+    }
+
+    if (pkg.version !== targetVersion) {
+      mismatches.push(`${pkg.name} (${pkg.version})`);
+    }
+  }
+
+  if (mismatches.length > 0) {
+    console.error(`release-check: plugin versions must match ${targetVersion}:`);
+    for (const item of mismatches) {
+      console.error(`  - ${item}`);
+    }
+    process.exit(1);
+  }
+}
+
 function main() {
+  checkPluginVersions();
+
   const results = runPackDry();
   const files = results.flatMap((entry) => entry.files ?? []);
   const paths = new Set(files.map((file) => file.path));