cavecrew
When to delegate to `cavecrew-investigator` (locate code), `cavecrew-builder` (1-2 file edit) or `cavecrew-reviewer` (diff…
@juliusbrusseeInstall SkillDevelopment
Skill
/lean-build
Build feature work with high overbuilding risk. Use for new behavior, product slices, or integrations where repository reuse, strict scope, and an explicit stop condition matter.
Claude Code
$ npx -y skills add JuliusBrussee/caveman --skill lean-build --agent claude-code
Codex
$ npx skills add JuliusBrussee/caveman --skill lean-build -a codex -y
Cursor
$ npx skills add JuliusBrussee/caveman --skill lean-build -a cursor -y
Gemini CLI
$ npx skills add JuliusBrussee/caveman --skill lean-build -a gemini-cli -y
GitHub Copilot
$ npx skills add JuliusBrussee/caveman --skill lean-build -a github-copilot -y
OpenCode
$ npx skills add JuliusBrussee/caveman --skill lean-build -a opencode -y
Windsurf
$ npx skills add JuliusBrussee/caveman --skill lean-build -a windsurf -y
SKILL.md
lean-build.SKILL.mdname: lean-build description: Build feature work with high overbuilding risk. Use for new behavior, product slices, or integrations where repository reuse, strict scope, and an explicit stop condition matter.
Lean build
Native Core's architecture-first simplicity remains mandatory. Turn feature into complete narrow outcome fitting system.
- Derive observable acceptance and explicit non-goals from request and repository.
- Trace entry point through layers owning invariants.
- Deliver coherent end-to-end path across responsible layers; never force work into one file, direct expression, or local patch.
- Reuse fitting seam. Refactor when patching duplicates behavior, weakens ownership, or hides root cause.
- Omit modes, providers, config, extensibility, and polish unless acceptance needs them.
- Add surface, dependency, service, config, or migration only for lifecycle design or acceptance; state material tradeoff.
- Keep work runnable; preserve Core safety.
Exercise path. Run focused proof. Stop when acceptance passes. Report only material omissions and trigger.
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Caveman make your AI agent say less and read less. Code stay exact. Brain still big.
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Questions about lean-build.
- Which coding agents can use lean-build?
- lean-build installs in Claude Code, Codex, Cursor, Gemini CLI, GitHub Copilot, OpenCode and Windsurf with the skills CLI, using each agent's flag shown on this page. Flowy's auto-invocation, which fires a skill when your prompt matches, runs in Claude Code only.