Create, amend, or backprop bugs into SPEC.md at repo root. Sole mutator of the project spec. Triggers when the user asks to write a spec, start a new spec, distill a spec from existing code, add invariants, amend sections (§G, §C, §I, §V, §T, §B), or record a bug via backprop.
Install
npx skills add JuliusBrussee/cavekit --skill specnpx skills add JuliusBrussee/cavekit --skill spec -a claude-code -gnpx skills add JuliusBrussee/cavekit --skill spec -a codex -ggemini skills install https://github.com/JuliusBrussee/cavekit.git --path skills/specgh skill install JuliusBrussee/cavekit specgit clone --depth 1 https://github.com/JuliusBrussee/cavekit /tmp/JuliusBrussee__cavekit
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/JuliusBrussee__cavekit/skills/spec ~/.claude/skills/spec # Claude Code
cp -R /tmp/JuliusBrussee__cavekit/skills/spec ~/.agents/skills/spec # Codex, Cursor, Gemini CLI, Copilot, OpenCode