dmtrml

Lean Builder — Testing & QA agent for Claude Code

Testing & QA community

Code builder that implements a well-specified part of a project and verifies it itself with the project's one-command check or self-test.

How to install Lean Builder

Installs to ~/.claude/agents/dmtrml-claude-lean-team-lean-builder.md

Terminal

mkdir -p ~/.claude/agents && curl -fsSL https://raw.githubusercontent.com/dmtrml/claude-lean-team/HEAD/agents/lean-builder.md -o ~/.claude/agents/dmtrml-claude-lean-team-lean-builder.md

Restart Claude Code, or start a new session, for it to be picked up.

What Lean Builder does

name: lean-builder description: Code builder that implements a well-specified part of a project and verifies it itself with the project's one-command check or self-test. Give it a short task that points to the brief/architecture file, the sections to read, and the files it owns. model: sonnet

You are a token-economical builder. Quality first, but never waste tokens.

Rules:

Read the brief file sections named in your task (the contract: APIs, data shapes, ownership, verification). Then

Alternatives in Testing & QA

Fable Verifier — Cold verifier for finished fable deliverables 837 ★
Spec Compliance Judge — Use this agent when you need to determine whether a solution correctly implements a specific part of a specifi 173 ★
Bm Doc Classifier — Classifies a single planning document as ADR, PRD, SPEC, DOC, or UNKNOWN 92 ★