---
name: Lean Build
slug: lean-build
category: AI Engineering
description: Lean Build guides feature work with high overbuilding risk, enforcing repository reuse, strict scope, and an explicit stop condition. Use it for new behavior, product slices, or integrations where a minimal, complete path matters.
github: "https://github.com/JuliusBrussee/caveman/tree/main/skills/lean-build"
language: Go
stars: 97841
forks: 5640
install: "npx degit https://github.com/JuliusBrussee/caveman/tree/main/skills/lean-build ~/.claude/skills/lean-build"
installs_to: ~/.claude/skills/lean-build
source_path: skills/lean-build/SKILL.md
collection_size: 20
category_size: 2451
collection_url: "https://dirskills.com/collections/JuliusBrussee/caveman"
added: 2026-08-13T07:35:52.556Z
last_synced: 2026-08-13T07:35:52.556Z
canonical_url: "https://dirskills.com/skills/lean-build"
---

# Lean Build

Lean Build guides feature work with high overbuilding risk, enforcing repository reuse, strict scope, and an explicit stop condition. Use it for new behavior, product slices, or integrations where a minimal, complete path matters.

**Install:**

```bash
npx degit https://github.com/JuliusBrussee/caveman/tree/main/skills/lean-build ~/.claude/skills/lean-build
```

## README

# 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.