If you're wanting to test your JavaScript skills this is the challenge for you. Use whichever JS framework you prefer and pull data from the REST Countries API.
2 files for Codex, OpenCode and Claude Code: rest-countries-api-with-color-theme-switcher AGENTS.md, rest-countries-api-with-color-theme-switcher CLAUDE.md — 2,333 tokens loaded in every session.
AGENTS.md A 2,301 tok CLAUDE.md A 32 tok These files are frontendmentorio/rest-countries-api-with-color-theme-switcher'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.