chore(release): add npm release target and update install script

Makefile

@@ -8,7 +8,7 @@ LDFLAGS := -X github.com/agentsdance/agentx/internal/version.Version=$(VERSION)
 
 PREFIX ?= /usr/local
 
-.PHONY: build install clean
+.PHONY: build install clean release
 
 build:
 	go build -ldflags "$(LDFLAGS)" -o agentx
@@ -19,3 +19,6 @@ install: build
 
 clean:
 	rm -f agentx
+
+release:
+	npm publish --access public

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@agentsdance/agentx",
-  "version": "0.0.8",
+  "version": "0.0.9",
   "description": "AgentX CLI installer (downloads the native AgentX binary on install)",
   "license": "MIT",
   "bin": {
@@ -9,14 +9,12 @@
   "files": [
     "bin/",
     "scripts/",
-    "vendor/",
     "README.md",
     "LICENSE"
   ],
   "scripts": {
     "postinstall": "node scripts/install.js"
   },
-  "dependencies": {},
   "engines": {
     "node": ">=18"
   },

scripts/install.js

@@ -16,6 +16,7 @@ const PKG_ROOT = path.resolve(__dirname, "..");
 const BIN_DIR = path.join(PKG_ROOT, "vendor");
 const BIN_NAME = os.platform() === "win32" ? "agentx.exe" : "agentx";
 const BIN_PATH = path.join(BIN_DIR, BIN_NAME);
+const VERSION_MARKER = path.join(BIN_DIR, ".agentx-version");
 
 const VERSION = require(path.join(PKG_ROOT, "package.json")).version;
 const REPO = "agentsdance/agentx";
@@ -148,7 +149,7 @@ async function main() {
   const { filename, ext, osName, arch } = getAssetInfo();
   await ensureDir(BIN_DIR);
 
-  if (fs.existsSync(BIN_PATH)) {
+  if (await isCurrentVersionInstalled()) {
     return;
   }
 
@@ -166,6 +167,7 @@ async function main() {
   }
   await promoteBinary(found);
   await makeExecutable(BIN_PATH);
+  await fs.promises.writeFile(VERSION_MARKER, VERSION, "utf8");
 }
 
 async function resolveRelease(expectedFilename, osName, arch, ext) {
@@ -248,6 +250,17 @@ async function fetchJson(url, redirects = 0) {
   });
 }
 
+async function isCurrentVersionInstalled() {
+  try {
+    const marker = await fs.promises.readFile(VERSION_MARKER, "utf8");
+    if (marker.trim() !== VERSION) return false;
+    await fs.promises.access(BIN_PATH, fs.constants.X_OK);
+    return true;
+  } catch (_) {
+    return false;
+  }
+}
+
 main().catch((err) => {
   console.error(`AgentX install failed: ${err.message}`);
   process.exit(1);