Read-only drift detector. Diffs SPEC.md against current code and reports violations grouped by severity. Writes nothing — suggests remedies via the spec or build skills but never invokes them. Triggers when the user asks to check drift, audit the spec, verify invariants, or ask whether code still matches the spec.
Install
npx skills add JuliusBrussee/cavekit --skill checknpx skills add JuliusBrussee/cavekit --skill check -a claude-code -gnpx skills add JuliusBrussee/cavekit --skill check -a codex -ggemini skills install https://github.com/JuliusBrussee/cavekit.git --path skills/checkgh skill install JuliusBrussee/cavekit checkgit clone --depth 1 https://github.com/JuliusBrussee/cavekit /tmp/JuliusBrussee__cavekit
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/JuliusBrussee__cavekit/skills/check ~/.claude/skills/check # Claude Code
cp -R /tmp/JuliusBrussee__cavekit/skills/check ~/.agents/skills/check # Codex, Cursor, Gemini CLI, Copilot, OpenCode