Add Tests

by open-gsd

Add Tests is a Quality skill for Claude Code, published by open-gsd in gsd-core.

8.3K stars573 forkson open-gsd/gsd-coreAdded 2026/08/15+1% in starsRepository updated 2026/08/15

View source on GitHub Download repo ZIP

claude-codecontext-engineeringmeta-promptingspec-driven-development

Install in seconds

Install Add Tests

Copy Add Tests into your Claude Code skills folder. Run the command in your terminal, or review the source on GitHub before installing.

terminal

npx degit https://github.com/open-gsd/gsd-core/tree/next/skills/gsd-add-tests ~/.claude/skills/gsd-add-tests

Requires Node.js. Downloads this skill only — not the rest of the repository — into your Claude Code skills folder.

Without Node.js

git clone https://github.com/open-gsd/gsd-core.git

Clones the whole repository, then copy the skill’s own directory into your skills folder yourself.

In this catalog

Source file: skills/gsd-add-tests/SKILL.md in open-gsd/gsd-core
Installs to: ~/.claude/skills/gsd-add-tests
Collection: One of 25 skills cataloged from this repository
Category: Quality — 1354 skills

What Add Tests does

Add Tests generates unit and E2E tests for a completed phase based on UAT criteria and implementation. Use it to classify implementation files, approve a test plan, and commit tests following RED-GREEN conventions.

Add Tests is cataloged under Quality on DirSkills. Add Tests comes from a repository tagged claude-code, context-engineering, meta-prompting and spec-driven-development.

Documentation

README

From the original repository

Analyzes implementation files, classifies them into TDD (unit), E2E (browser), or Skip categories, presents a test plan for user approval, then generates tests following RED-GREEN conventions.

Output: Test files committed with message test(phase-{N}): add unit and E2E tests from add-tests command

<execution_context> @~/.claude/gsd-core/workflows/add-tests.md </execution_context>

@.planning/STATE.md @.planning/ROADMAP.md

Frequently asked about Add Tests

What else does open-gsd publish alongside Add Tests?
Add Tests is one of 25 skills that DirSkills catalogs from open-gsd/gsd-core, the repository it ships in. Its siblings there include AI Integration Phase, Complete Milestone and Execute Phase. Each one is a separate skill with its own page in this directory, installs the same way Add Tests does, and is maintained by open-gsd in that same repository. The rest of the collection is listed on the open-gsd/gsd-core page.
How does Add Tests compare to other Quality skills?
Add Tests ranks #212 by stars among the 1354 Quality skills in this catalog. The most-starred ones next to it are Benchmark, Benchmark Optimization Loop and API Design Patterns. DirSkills ranks by the star count of the repository each skill ships in, so that order reflects how popular those repositories are rather than any review of Add Tests against them. Open each page to compare what they document and how they install.