Test Write

Quality score: 70/100 · Category: Engineering · Sub-category: testing

Use when backfilling tests on existing code. Analyzes code through public interfaces, detects the project's test framework, and writes behavior-focused regression tests. Supports targeted mode (specific files) and diff-based mode (changed files from git). Use this whenever the user says write tests, add tests, cover this, or wants regression tests for existing code.

What this skill does

Test Write is a production-ready Claude Code skill (quality score 70/100) in the testing sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/test-write/ and loads when your prompt matches the skill's trigger.

When to invoke it: Use when backfilling tests on existing code. Analyzes code through public interfaces, detects the project's test framework, and writes behavior-focused regression tests.

Who uses this skill

The Test Write skill is built for software engineers, backend developers, full-stack teams, and technical leads building and maintaining production systems. It is part of the open ClaudSkills registry, a community-curated catalog of 15,000+ capabilities you can install for Claude Code — the Claude CLI agent.

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/test-write
curl -L https://claudskills.com/skills/test-write/SKILL.md \
  -o ~/.claude/skills/test-write/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/test-write/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/test-write/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\test-write\SKILL.md on Windows. See the full install guide for step-by-step instructions.

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

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Part of ClaudSkills — the open registry for Claude Code skills. · What's New · Install guide · About · llms.txt

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