Fix plugin manifest version consistency

scripts/validate-versions.js

@@ -0,0 +1,36 @@
+#!/usr/bin/env node
+
+"use strict";
+
+const { execFileSync } = require("node:child_process");
+const { readFileSync } = require("node:fs");
+
+const manifestPaths = [
+  "plugin.json",
+  ".codex-plugin/plugin.json",
+  ".claude-plugin/plugin.json",
+  ".claude-plugin/marketplace.json",
+  ".agents/plugins/marketplace.json",
+];
+
+function readManifestVersion(manifestPath) {
+  const manifest = JSON.parse(readFileSync(manifestPath, "utf8"));
+  return manifest.version ?? manifest.plugins?.[0]?.version;
+}
+
+const expectedVersion = execFileSync(
+  "git",
+  ["describe", "--tags", "--abbrev=0"],
+  { encoding: "utf8" },
+).trim();
+
+for (const manifestPath of manifestPaths) {
+  const version = readManifestVersion(manifestPath);
+  if (version !== expectedVersion) {
+    throw new Error(
+      `${manifestPath} has version ${version ?? "<missing>"}; expected ${expectedVersion}`,
+    );
+  }
+}
+
+console.log(`All plugin manifests use version ${expectedVersion}.`);