Swig Test
swig/swig
Run SWIG test suite for specific languages. An agent skill from swig/swig.
Add new behavior test-first (write failing test → make it pass → refactor).
Install TDD
$ npx skills add av/mi --skill tdd -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install av/mi tdd --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/av/mi.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/tdd .claude/skills/tdd && 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 "tdd" agent skill from https://github.com/av/mi/tree/master/skills/tdd into .claude/skills/tdd/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tdd", 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/av/mi/tree/master/skills/tddType 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 av/mi --skill tdd -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install av/mi tdd --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/av/mi.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/tdd .agents/skills/tdd && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "tdd" agent skill from https://github.com/av/mi/tree/master/skills/tdd into .agents/skills/tdd/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tdd", 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 av/mi --skill tdd -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install av/mi tdd --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/av/mi.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/tdd .cursor/skills/tdd && 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 "tdd" agent skill from https://github.com/av/mi/tree/master/skills/tdd into .cursor/skills/tdd/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tdd", 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/av/mi.git --path skills/tdd--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 av/mi --skill tdd -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install av/mi tdd --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/av/mi.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/tdd .gemini/skills/tdd && 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 "tdd" agent skill from https://github.com/av/mi/tree/master/skills/tdd into .gemini/skills/tdd/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tdd", 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 av/mi tddInstalls 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 av/mi --skill tdd -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/av/mi.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/tdd .github/skills/tdd && 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 "tdd" agent skill from https://github.com/av/mi/tree/master/skills/tdd into .github/skills/tdd/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tdd", 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 av/mi --skill tdd -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install av/mi tdd --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/av/mi.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/tdd .opencode/skills/tdd && 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 "tdd" agent skill from https://github.com/av/mi/tree/master/skills/tdd into .opencode/skills/tdd/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tdd", 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
tdd- GitHub stars
- 102
- Token cost
- ~972 tokens
- SKILL.md length
- 538 words
- Files
- 1
- Skills in repo
- 20
- Repo updated
- First seen
- Licence
- None found
At a glance
Add new behavior test-first (write failing test → make it pass → refactor).
- Works in 5 steps: Red — write one failing test → Red — confirm it fails for the right… → Green — minimum code to pass → …
- Asked to add a test for
- Calls cargo, go and pytest
- Implement X with tests
What it does
TDD is an agent skill from av/mi. Add new behavior test-first (write failing test → make it pass → refactor). Use when asked to "add a test for", "implement X with tests", or extending a codebase that already has a test suite.
Its SKILL.md is about 970 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 Testing & QA, covering Test-driven development, Failing and flaky tests and Test generation. The repository describes itself as: self-extending sandboxed agentic harness. a loop, two tools and an llm.
When your agent uses it
- Asked to add a test for
- Implement X with tests
- Extending a codebase that already has a test suite
Example prompts
- “add a test for”
- “implement X with tests”
- “/tdd”
Requirements
- Python 3
Workflow steps
5 steps, taken from the first numbered list in SKILL.md.
- Red — write one failing test
- Red — confirm it fails for the right reason
- Green — minimum code to pass
- Green — run the relevant subset
- Refactor
What it can do on your machine
Read from SKILL.md and the folder at commit 2bf50c9. 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
Shell commands in SKILL.md call:
cargogopytestvitestpython3
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
TDD loads about 972 tokens when it runs. Until then it costs about 49 tokens; SKILL.md has 538 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 538 words (~972 tokens).
“First, confirm a test harness exists (pytest, jest/vitest, cargo test, go test, rspec, etc.) and that the existing suite runs green. If there is no harness, stop and tell the user — do not scaffold one without being asked.”
- name
- tdd
Files
Just SKILL.md in skills/tdd of av/mi.
Open the folder on GitHubat commit 2bf50c9
Compare with similar skills
TDD 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 |
|---|---|---|---|---|---|---|
| TDD this skillav/mi | 102 | — | ~972 | Automated safety check: Pass | None | |
| Swig Testswig/swig | 6.3k | — | ~2.3k | Automated safety check: Pass | Custom licence | |
| Wioworkersio/skills | 180 | — | ~5.8k | Automated safety check: Pass | MIT | |
| Offloadimbue-ai/offload | 125 | — | ~3.1k | Automated safety check: Pass | MIT | |
| Designing TestsCloudAI-X/opencode-workflow | 275 | — | ~2.9k | Automated safety check: Pass | MIT | |
| TDD Guidealirezarezvani/claude-code-skill-factory | 879 | 1 repos | ~2.7k | Automated safety check: Pass | MIT |
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Related
Categories
Questions about TDD
What does TDD do?
Add new behavior test-first (write failing test → make it pass → refactor). TDD is an agent skill from av/mi. Add new behavior test-first (write failing test → make it pass → refactor).
When should I use TDD?
TDD fits situations like: asked to add a test for; implement X with tests; extending a codebase that already has a test suite.
How do I install TDD in Claude Code?
Run `npx skills add av/mi --skill tdd -a claude-code`. Or copy the skill folder (skills/tdd in av/mi) into .claude/skills/tdd in your project. Claude Code loads it when a task matches its description.
How do I install TDD in Codex?
Run `npx skills add av/mi --skill tdd -a codex`. Or copy the skill folder (skills/tdd in av/mi) into .agents/skills/tdd in your project. Codex loads it when a task matches its description.
Can I use TDD 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 av/mi --skill tdd -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/tdd, .gemini/skills/tdd, .github/skills/tdd and .opencode/skills/tdd in your project.
What does TDD need to run?
Going by SKILL.md and its folder, TDD needs the command-line tools its instructions call (cargo, go, pytest, vitest and python3). Our summary lists: Python 3.
Does TDD 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 TDD 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 TDD use?
No licence was found for TDD or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.
How many tokens does TDD use?
About 972 tokens (SKILL.md is roughly 3.9k 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 TDD?
Skills that share tags, products or a category with TDD: Swig Test (swig/swig, 6.3k stars), Wio (workersio/skills, 180 stars), Offload (imbue-ai/offload, 125 stars) and Designing Tests (CloudAI-X/opencode-workflow, 275 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains TDD?
av (a GitHub user) maintains it in av/mi, which has 102 GitHub stars. The repository holds 20 skills in this directory. The repository was last updated on September 26, 2026.
Source: av/mi on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.