Mmcp.market

tdd-enforcement skill

by a5c-ai·a5c-ai/babysitter·1.8k stars·MIT

Red-Green-Refactor TDD methodology with mandatory failing tests, minimal implementation, quality refactoring, and 80% coverage gating.

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Is the tdd-enforcement skill safe?

Clean: nothing in its files matched our rules. We read 2 files in the folder on 2026-09-28.

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Install the tdd-enforcement skill

A skill is a folder. Copy it into your agent's skills folder and the agent loads it when the task matches its description. 

git clone --depth 1 https://github.com/a5c-ai/babysitter.git /tmp/babysitter
mkdir -p ~/.claude/skills
cp -r /tmp/babysitter/library/methodologies/everything-claude-code/skills/tdd-enforcement ~/.claude/skills/tdd-enforcement
available in every project

In the Claude apps, zip the folder and upload it from the Skills settings. The folder on GitHub

The instructions your agent would load

SKILL.md as published, without the frontmatter. Read it on GitHub

  • Write tests that define expected behavior
  • Tests MUST fail (exit code 1)
  • Use CI=true or --run flag, never watch mode
  • Apply timeout guards (60s) to prevent hanging
  • Record exit code as evidence

2. GREEN Phase - Minimal Implementation

  • Write the minimal code to make tests pass
  • Do NOT add features not covered by tests
  • Do NOT optimize prematurely
  • Tests MUST pass (exit code 0)
  • Record exit code as evidence

3. REFACTOR Phase - Quality Improvement

  • Apply SOLID principles and clean code patterns
  • Improve naming, reduce coupling
  • Remove duplication
  • Run tests after EACH refactoring step
  • Tests MUST remain passing (exit code 0)

4. Coverage Gate

  • Measure coverage: statements, branches, functions, lines
  • Minimum 80% overall coverage required
  • Iterate: write additional tests for gaps until threshold met
  • Maximum 3 convergence iterations

Rules

  • Never skip the RED phase
  • Never accept GREEN without exit code 0
  • Never use watch mode in CI
  • Always record evidence (exit codes, coverage numbers)
  • Enforce 80% coverage threshold

When to Use

  • All code implementation tasks
  • Feature development
  • Bug fixes (write regression test first)

Agents Used

  • tdd-guide (primary consumer)
  • code-reviewer (validates test quality)

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