chore: establish YCode replication baseline and TODO

scripts/probe-messages.mjs

@@ -0,0 +1,51 @@
+/** 读取当前会话消息的真实状态。用法：node scripts/probe-messages.mjs <port> */
+
+const port = Number(process.argv[2] ?? 9335)
+
+async function main() {
+  const list = await (await fetch(`http://127.0.0.1:${port}/json/list`)).json()
+  const page = list.filter((t) => t.type === 'page')[0]
+  const ws = new WebSocket(page.webSocketDebuggerUrl)
+  await new Promise((r) => ws.addEventListener('open', r))
+  const send = (method, params = {}) =>
+    new Promise((res) => {
+      const id = 1
+      const h = (e) => {
+        const d = JSON.parse(e.data)
+        if (d.id === id) {
+          ws.removeEventListener('message', h)
+          res(d.result)
+        }
+      }
+      ws.addEventListener('message', h)
+      ws.send(JSON.stringify({ id, method, params }))
+    })
+
+  const r = await send('Runtime.evaluate', {
+    expression: `(async () => {
+      const sessions = await window.ycode.session.list();
+      const current = sessions[0];
+      if (!current) return JSON.stringify({ err: 'no session' });
+      const msgs = await window.ycode.session.messages(current.id);
+      return JSON.stringify({
+        sessionId: current.id,
+        messages: msgs.slice(-3).map((m) => ({
+          role: m.role,
+          status: m.status ?? null,
+          error: m.error ?? null,
+          len: (m.content || '').length,
+          tools: (m.tools || []).length
+        }))
+      });
+    })()`,
+    returnByValue: true,
+    awaitPromise: true
+  })
+  console.log(JSON.parse(r.result.value))
+  ws.close()
+}
+
+main().catch((e) => {
+  console.error('失败：', e.message)
+  process.exit(1)
+})