fix: Cursor Docker install and playground Next 16 / PORT

.changeset/cursor-docker-local-bin.md

@@ -0,0 +1,5 @@
+---
+"@vercel/agent-eval": patch
+---
+
+Fix Cursor CLI Docker setup: `node:*-slim` has no `curl`, so `curl https://cursor.com/install | bash` failed with `curl: command not found`, and even after a successful install `spawnSync agent` missed `~/.local/bin`. Sandbox setup now installs `curl` (and fails if apt does), sets HOME to the `node` user home, puts `~/.local/bin` on PATH, and the Cursor runner resolves the installer symlink directly.

.changeset/playground-port-and-next16.md

@@ -0,0 +1,6 @@
+---
+"@vercel/agent-eval": patch
+"@vercel/agent-eval-playground": patch
+---
+
+Honor `PORT` / `--port` / `-p` when launching the playground, and stop Next.js 16.3 from crashing on a stale shipped `.next` build. Published playground builds omit `routes-manifest.json#onMatchHeaders`; Next 16.2.4+ calls `.map()` on that field and dies with `Cannot read properties of undefined (reading 'map')`. The playground now writes an empty array before `next start`, and a `file:` / monorepo agent-eval checkout prefers the local playground bin.

README.md

@@ -636,6 +636,7 @@ This opens a local Next.js app with:
 Options:
 ```bash
 npx @vercel/agent-eval playground --results-dir ./results --evals-dir ./evals --port 3001
+PORT=3001 npx @vercel/agent-eval playground   # same thing via env
 ```
 
 ### File Copying