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tdd-vertical-slices

95 / 100 · Low risk

Fine to try.

By gonzalezpazmonica/savia (GitHub) · coding · 49 stars · scanned at commit 7f6f27f

Test-driven development with vertical-slice red-green-refactor cycles. Use when applying TDD to a new feature or bug fix, when user mentions 'red-green-refactor', 'tdd', 'test-first', 'vertical slice' — explicitly avoids the 'horizontal slicing' anti-pattern (write all tests first, then all code) which produces brittle implementation-coupled tests.

Works with any agent that supports SKILL.md skills.

What this skill can do

Install

Paste this into your terminal. It downloads exactly the version we scanned, not whatever is newest.

if [ -e ~/.agents/skills/'tdd-vertical-slices' ] || [ -L ~/.agents/skills/'tdd-vertical-slices' ]; then echo 'A skill folder named tdd-vertical-slices already exists — not replacing it' >&2; false; else d=$(mktemp -d) && git clone --quiet --filter=blob:none --no-checkout 'https://github.com/gonzalezpazmonica/savia' "$d" && git -C "$d" checkout --quiet '7f6f27f530548fd9ea275f3f2584c785529f5f5b' -- '.claude/skills/tdd-vertical-slices' && mkdir -p ~/.agents/skills && cp -R "$d"/'.claude/skills/tdd-vertical-slices' ~/.agents/skills/'tdd-vertical-slices' && rm -rf "$d"; fi

Codex reads ~/.agents/skills directly. For Claude Code, Cursor, Copilot, Gemini CLI, Antigravity or OpenCode, also link it. For Claude Code: ln -s ~/.agents/skills/'tdd-vertical-slices' ~/.claude/skills/'tdd-vertical-slices' (other agents: ~/.cursor/skills, ~/.copilot/skills, ~/.gemini/skills, ~/.gemini/config/skills, ~/.config/opencode/skills). Or install through the finder skill, which does both.

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