Tiny proxy that exposes a single AI endpoint backed by OpenRouter's best currently-available free model — auto-discovers, scores, and falls back on failure.

• Polls OpenRouter's /models every 5 min and filters to zero-price models
• Scores by context length, parameter count, and recent failures; picks the top one
• Proxies chat-completions requests to the selected model; transparently switches on errors
• Persists rolling stats (request/error/switch counters) to data/stats.json

Bun runtime, no framework — a single server.js.

cp .env.example .env     # add your OpenRouter key
bun run start            # bun server.js

Server listens on PORT (default 3700).

• Required env: OPENROUTER_API_KEY. Optional: PORT.
• Generated state lives in data/models.json and data/stats.json — both git-ignored.
• nginx.conf is an example reverse-proxy config.