Run Tests
netboxlabs/netbox-branching
Run the netboxbranching plugin's Django test suite against a local NetBox checkout.
Apply Rails testing standards with Minitest, fixtures, and pragmatic coverage boundaries.
Install Rails Testing
$ npx skills add marckohlbrugge/37signals-skills --skill rails-testing -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install marckohlbrugge/37signals-skills rails-testing --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/marckohlbrugge/37signals-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/rails-testing .claude/skills/rails-testing && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "rails-testing" agent skill from https://github.com/marckohlbrugge/37signals-skills/tree/main/skills/rails-testing into .claude/skills/rails-testing/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "rails-testing", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/marckohlbrugge/37signals-skills/tree/main/skills/rails-testingType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add marckohlbrugge/37signals-skills --skill rails-testing -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install marckohlbrugge/37signals-skills rails-testing --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/marckohlbrugge/37signals-skills.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/rails-testing .agents/skills/rails-testing && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "rails-testing" agent skill from https://github.com/marckohlbrugge/37signals-skills/tree/main/skills/rails-testing into .agents/skills/rails-testing/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "rails-testing", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add marckohlbrugge/37signals-skills --skill rails-testing -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install marckohlbrugge/37signals-skills rails-testing --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/marckohlbrugge/37signals-skills.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/rails-testing .cursor/skills/rails-testing && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "rails-testing" agent skill from https://github.com/marckohlbrugge/37signals-skills/tree/main/skills/rails-testing into .cursor/skills/rails-testing/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "rails-testing", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/marckohlbrugge/37signals-skills.git --path skills/rails-testing--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add marckohlbrugge/37signals-skills --skill rails-testing -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install marckohlbrugge/37signals-skills rails-testing --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/marckohlbrugge/37signals-skills.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/rails-testing .gemini/skills/rails-testing && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "rails-testing" agent skill from https://github.com/marckohlbrugge/37signals-skills/tree/main/skills/rails-testing into .gemini/skills/rails-testing/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "rails-testing", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install marckohlbrugge/37signals-skills rails-testingInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add marckohlbrugge/37signals-skills --skill rails-testing -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/marckohlbrugge/37signals-skills.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/rails-testing .github/skills/rails-testing && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "rails-testing" agent skill from https://github.com/marckohlbrugge/37signals-skills/tree/main/skills/rails-testing into .github/skills/rails-testing/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "rails-testing", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add marckohlbrugge/37signals-skills --skill rails-testing -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install marckohlbrugge/37signals-skills rails-testing --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/marckohlbrugge/37signals-skills.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/rails-testing .opencode/skills/rails-testing && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "rails-testing" agent skill from https://github.com/marckohlbrugge/37signals-skills/tree/main/skills/rails-testing into .opencode/skills/rails-testing/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "rails-testing", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
rails-testing- GitHub stars
- 724
- Token cost
- ~1.1k tokens
- SKILL.md length
- 469 words
- Files
- 1
- Skills in repo
- 8
- Repo updated
- First seen
- Licence
- None found
At a glance
Apply Rails testing standards with Minitest, fixtures, and pragmatic coverage boundaries.
- Reviewing test quality
- SKILL.md covers Defaults, Coverage Budget (where…, Fixtures and Good Practices, plus 1 more section
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
- Improving flaky and slow Rails test suites
What it does
Rails Testing is an agent skill from marckohlbrugge/37signals-skills. Apply Rails testing standards with Minitest, fixtures, and pragmatic coverage boundaries. Use when creating tests, reviewing test quality, or improving flaky and slow Rails test suites.
Its SKILL.md is about 1.1k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It sits in Backend & APIs, covering Backend development and Test generation. The repository describes itself as: Unofficial agent skills + reference guide that teach AI coding assistants to write Rails the 37signals way — extracted from Fizzy, Campfire, and DHH's code reviews.
When your agent uses it
- Reviewing test quality
- Improving flaky and slow Rails test suites
Example prompts
- “/rails-testing”
What it can do on your machine
Read from SKILL.md and the folder at commit c58e7d5. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md.
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Rails Testing loads about 1.1k tokens when it runs. Until then it costs about 50 tokens; SKILL.md has 469 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
Without a licence we can't republish the file, so here is its outline and opening line. It has 469 words (~1,061 tokens).
“Use for test-writing and test-review tasks. Patterns from Campfire and Fizzy test suites.”
- name
- rails-testing
- disable-model-invocation
- true
Files
Just SKILL.md in skills/rails-testing of marckohlbrugge/37signals-skills.
Open the folder on GitHubat commit c58e7d5
Compare with similar skills
Rails Testing next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Rails Testing this skillmarckohlbrugge/37signals-skills | 724 | — | ~1.1k | Automated safety check: Pass | None | |
| Run Testsnetboxlabs/netbox-branching | 155 | — | ~1.2k | Automated safety check: Pass | Custom licence | |
| Django Test Performancehashgraph-online/awesome-codex-plugins | 1.3k | — | ~1.1k | Automated safety check: Pass | MIT | |
| Django Test Profilinghashgraph-online/awesome-codex-plugins | 1.3k | — | ~892 | Automated safety check: Pass | MIT | |
| Spring Boot Test Patternsgiuseppe-trisciuoglio/developer-kit | 357 | — | ~2.3k | Automated safety check: Notes | MIT | |
| Speeding Up Laravel Testsfreekmurze/dotfiles | 1k | — | ~1.1k | Automated safety check: Notes | None |
Similar skills
Django Test Performance
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Improve slow Django test suites through measured profiling, safe test settings, database and migration tuning, parallel execution, test-data cleanup, and CI workflow changes.
Django Test Profiling
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Profile and measure slow Django test suites with Django's runner, pytest-django, shell timing, py-spy, cProfile, pytest durations, and profiler visualizations.
Spring Boot Test Patterns
giuseppe-trisciuoglio/developer-kit
Provides comprehensive testing patterns for Spring Boot applications covering unit, integration, slice, and container-based testing with JUnit 5, Mockito, Testcontainers, and performance optimization.
Speeding Up Laravel Tests
freekmurze/dotfiles
A skill your agent uses when Laravel/Pest test suites are slow, CI duration is growing, individual tests take seconds, or the user asks to speed up, optimize, or profile tests.
Coverage Check
AI-Unified-Process/marketplace
Audits an already-written use case (UC-XXX) or test case (TC-XXX) against its specification and reports a coverage matrix: which main success scenario steps, alternative flows, business rules…
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Questions about Rails Testing
What does Rails Testing do?
Apply Rails testing standards with Minitest, fixtures, and pragmatic coverage boundaries. Rails Testing is an agent skill from marckohlbrugge/37signals-skills. Apply Rails testing standards with Minitest, fixtures, and pragmatic coverage boundaries.
When should I use Rails Testing?
Rails Testing fits situations like: reviewing test quality; improving flaky and slow Rails test suites.
How do I install Rails Testing in Claude Code?
Run `npx skills add marckohlbrugge/37signals-skills --skill rails-testing -a claude-code`. Or copy the skill folder (skills/rails-testing in marckohlbrugge/37signals-skills) into .claude/skills/rails-testing in your project. Claude Code loads it when a task matches its description.
How do I install Rails Testing in Codex?
Run `npx skills add marckohlbrugge/37signals-skills --skill rails-testing -a codex`. Or copy the skill folder (skills/rails-testing in marckohlbrugge/37signals-skills) into .agents/skills/rails-testing in your project. Codex loads it when a task matches its description.
Can I use Rails Testing in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add marckohlbrugge/37signals-skills --skill rails-testing -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/rails-testing, .gemini/skills/rails-testing, .github/skills/rails-testing and .opencode/skills/rails-testing in your project.
What does Rails Testing need to run?
SKILL.md names no scripts, command-line tools or credentials: Rails Testing is instructions for the agent only.
Does Rails Testing access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Rails Testing safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Rails Testing use?
No licence was found for Rails Testing or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.
How many tokens does Rails Testing use?
About 1.1k tokens (SKILL.md is roughly 4.2k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Rails Testing?
Skills that share tags, products or a category with Rails Testing: Run Tests (netboxlabs/netbox-branching, 155 stars), Django Test Performance (hashgraph-online/awesome-codex-plugins, 1.3k stars), Django Test Profiling (hashgraph-online/awesome-codex-plugins, 1.3k stars) and Spring Boot Test Patterns (giuseppe-trisciuoglio/developer-kit, 357 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Rails Testing?
marckohlbrugge (a GitHub user) maintains it in marckohlbrugge/37signals-skills, which has 724 GitHub stars. The repository holds 8 skills in this directory. The repository was last updated on June 9, 2026.
Source: marckohlbrugge/37signals-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.