Agent Skill that teaches AI agents the free Frankfurter exchange rate API
2 files for Codex, OpenCode and Claude Code: frankfurter-api AGENTS.md, frankfurter-api CLAUDE.md — 683 tokens loaded in every session.
AGENTS.md A 556 tok CLAUDE.md A 127 tok These files are NanookAI/frankfurter-api's own configuration — they tell Codex, OpenCode and Claude Code how to work on this repository, so they are not mods to install elsewhere. Copy one as a starting point and replace the parts that are about this project.