chore: import upstream snapshot with attribution

tests/unit/mitm-handler-trae.test.ts

@@ -0,0 +1,23 @@
+import test from "node:test";
+import assert from "node:assert/strict";
+import type { IncomingMessage, ServerResponse } from "node:http";
+import { TraeHandler } from "../../src/mitm/handlers/trae.ts";
+
+test("trae handler — intercept throws structured error (viability=investigating)", async () => {
+  const h = new TraeHandler();
+  const req = {
+    method: "POST",
+    url: "/x",
+    headers: { host: "trae.invalid" },
+  } as unknown as IncomingMessage;
+  const res = {
+    headersSent: false,
+    writeHead() {},
+    end() {},
+  } as unknown as ServerResponse;
+
+  await assert.rejects(
+    () => h.intercept(req, res, Buffer.from("{}"), "gpt-4o"),
+    /investigation|invalid|not.*implement/i
+  );
+});