add browser skill

skills/browser/scripts/screenshot.cjs

@@ -0,0 +1,54 @@
+#!/usr/bin/env node
+// Capture screenshot of the active browser tab
+const http = require('http');
+const WebSocket = require('ws');
+const fs = require('fs');
+const path = require('path');
+const os = require('os');
+
+async function getTargets() {
+  return new Promise((resolve, reject) => {
+    http.get('http://localhost:9222/json', res => {
+      let data = '';
+      res.on('data', chunk => data += chunk);
+      res.on('end', () => resolve(JSON.parse(data)));
+    }).on('error', reject);
+  });
+}
+
+(async () => {
+  try {
+    const targets = await getTargets();
+    const page = targets.find(t => t.type === 'page');
+    if (!page) throw new Error('No active page found');
+
+    const ws = new WebSocket(page.webSocketDebuggerUrl);
+
+    ws.on('open', () => {
+      ws.send(JSON.stringify({
+        id: 1,
+        method: 'Page.captureScreenshot',
+        params: { format: 'png' }
+      }));
+    });
+
+    ws.on('message', data => {
+      const msg = JSON.parse(data);
+      if (msg.id === 1) {
+        ws.close();
+        const filename = `screenshot-${Date.now()}.png`;
+        const filepath = path.join(os.tmpdir(), filename);
+        fs.writeFileSync(filepath, Buffer.from(msg.result.data, 'base64'));
+        console.log(JSON.stringify({ path: filepath, filename }));
+      }
+    });
+
+    ws.on('error', e => {
+      console.error('WebSocket error:', e.message);
+      process.exit(1);
+    });
+  } catch (e) {
+    console.error('Error:', e.message);
+    process.exit(1);
+  }
+})();