A JavaScript library to develop custom apps for Contentful
Latest release v5.0.0 · 28 Oct 2026
2 files for Codex, OpenCode and Claude Code: ui-extensions-sdk AGENTS.md, ui-extensions-sdk CLAUDE.md — 2,817 tokens loaded in every session.
AGENTS.md A 2,020 tok CLAUDE.md A 797 tok These files are contentful/ui-extensions-sdk'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.