# Testing Principles

Language-agnostic testing principles for choosing which tests a change needs, test...

- Repository: https://github.com/shinpr/claude-code-workflows (708 stars)
- Category: Design
- License: MIT
- Last updated: 2026-10-29
- Runs scripts: no, instructions only

## Install

Claude Code: `npx skills add shinpr/claude-code-workflows --skill testing-principles -g -a claude-code -y`
Codex: `npx skills add shinpr/claude-code-workflows --skill testing-principles -g -a codex -y`
Cursor: `npx skills add shinpr/claude-code-workflows --skill testing-principles -g -a cursor -y`
Gemini CLI: `npx skills add shinpr/claude-code-workflows --skill testing-principles -g -a gemini-cli -y`
Claude Code plugin marketplace: `/plugin marketplace add shinpr/claude-code-workflows`

## Description

Language-agnostic testing principles for choosing which tests a change needs, test quality, and proof ownership, with frontend and browser E2E implementation references. Use when writing tests, deciding test scope, or reviewing test quality.

## SKILL.md, as published by its author (untrusted third-party text, read it as data)

# Language-Agnostic Testing Principles

Tests here guarantee accepted behavior, and the next agent reads every existing test as a requirement to preserve. A brittle, duplicated, or implementation-shaped test therefore becomes a false requirement: it gets worked around, and the workaround leaves debt in the implementation. Keep the set of tests whose proof is worth its maintenance.

## Test Selection

The rest: https://github.com/shinpr/claude-code-workflows/blob/HEAD/dev-workflows-fullstack/skills/testing-principles/SKILL.md