RepoFinder
Turn a project and a goal into a short list of open source tools that genuinely fit - then interrogate every pick. Built entirely with OpenAI Codex on the OpenAI Responses API: gpt-5.6-luna extracts, gpt-5.6-terra ranks and explains, strict JSON Schema outputs, a labeled GitHub fallback, a remote MCP tool, 15 checked-in lessons on how Codex works, and a three-tier eval harness. One Cloudflare Worker, D1, plain HTML/CSS/JS.