TDD
fossasia/eventyay-interpretation
Test-driven development. An agent skill from fossasia/eventyay-interpretation.
Drive changes with Red→Green→Refactor; ensure behavior is verifiable and regression-safe.
Install Test Driven Development
$ npx skills add KbWen/agentic-os --skill test-driven-development -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install KbWen/agentic-os test-driven-development --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/KbWen/agentic-os.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/test-driven-development .claude/skills/test-driven-development && 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 "test-driven-development" agent skill from https://github.com/KbWen/agentic-os/tree/main/.agents/skills/test-driven-development into .claude/skills/test-driven-development/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "test-driven-development", 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/KbWen/agentic-os/tree/main/.agents/skills/test-driven-developmentType 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 KbWen/agentic-os --skill test-driven-development -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install KbWen/agentic-os test-driven-development --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/KbWen/agentic-os.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.agents/skills/test-driven-development .agents/skills/test-driven-development && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "test-driven-development" agent skill from https://github.com/KbWen/agentic-os/tree/main/.agents/skills/test-driven-development into .agents/skills/test-driven-development/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "test-driven-development", 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 KbWen/agentic-os --skill test-driven-development -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install KbWen/agentic-os test-driven-development --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/KbWen/agentic-os.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.agents/skills/test-driven-development .cursor/skills/test-driven-development && 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 "test-driven-development" agent skill from https://github.com/KbWen/agentic-os/tree/main/.agents/skills/test-driven-development into .cursor/skills/test-driven-development/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "test-driven-development", 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/KbWen/agentic-os.git --path .agents/skills/test-driven-development--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 KbWen/agentic-os --skill test-driven-development -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install KbWen/agentic-os test-driven-development --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/KbWen/agentic-os.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.agents/skills/test-driven-development .gemini/skills/test-driven-development && 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 "test-driven-development" agent skill from https://github.com/KbWen/agentic-os/tree/main/.agents/skills/test-driven-development into .gemini/skills/test-driven-development/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "test-driven-development", 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 KbWen/agentic-os test-driven-developmentInstalls 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 KbWen/agentic-os --skill test-driven-development -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/KbWen/agentic-os.git skills-src && mkdir -p .github/skills && cp -r skills-src/.agents/skills/test-driven-development .github/skills/test-driven-development && 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 "test-driven-development" agent skill from https://github.com/KbWen/agentic-os/tree/main/.agents/skills/test-driven-development into .github/skills/test-driven-development/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "test-driven-development", 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 KbWen/agentic-os --skill test-driven-development -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install KbWen/agentic-os test-driven-development --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/KbWen/agentic-os.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.agents/skills/test-driven-development .opencode/skills/test-driven-development && 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 "test-driven-development" agent skill from https://github.com/KbWen/agentic-os/tree/main/.agents/skills/test-driven-development into .opencode/skills/test-driven-development/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "test-driven-development", 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
test-driven-development- GitHub stars
- 206
- Token cost
- ~239 tokens
- SKILL.md length
- 115 words
- Files
- 2
- Skills in repo
- 12
- Repo updated
- First seen
- Licence
- MIT
At a glance
Drive changes with Red→Green→Refactor; ensure behavior is verifiable and regression-safe.
- Works in 4 steps: Red: Write a failing test describing the… → Green: Write the minimal code to make… → Refactor: Clean up naming, structure,… → …
- Tasks that involve Test-driven development
- SKILL.md covers Overview, When to Use, Workflow and Ironclad Rules
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Test Driven Development is an agent skill from KbWen/agentic-os. Drive changes with Red→Green→Refactor; ensure behavior is verifiable and regression-safe.
Its SKILL.md is about 240 tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files (for example `agents/openai.yaml`).
It sits in Testing & QA, covering Test-driven development. The repository describes itself as: Governance framework for AI coding agents. It runs them through a five-step workflow (plan, build, review, test, ship) where no step counts as done without evidence. Drop-in… The licence is MIT.
When your agent uses it
- Tasks that involve Test-driven development
Example prompts
- “/test-driven-development”
Workflow steps
4 steps, taken from the first numbered list in SKILL.md.
- Red: Write a failing test describing the expected behavior.
- Green: Write the minimal code to make the test pass.
- Refactor: Clean up naming, structure, and duplication.
- Repeat the cycle until acceptance criteria are met.
What it can do on your machine
Read from SKILL.md and the folder at commit 81a4034. 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
Test Driven Development loads about 239 tokens when it runs. Until then it costs about 28 tokens; SKILL.md has 115 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
The full file from KbWen/agentic-os at commit 81a4034, republished under its MIT licence (© KbWen). 115 words, ~239 tokens.
Download SKILL.mdSave it as
.claude/skills/test-driven-development/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.- name
- test-driven-development
- description
- Drive changes with Red→Green→Refactor; ensure behavior is verifiable and regression-safe.
Test-Driven Development
Overview
TDD uses the Red → Green → Refactor micro-cycle. First, define expected behavior. Next, use a minimal implementation to pass the test. Finally, organize the code structure.
When to Use
- Adding or modifying core logic.
- Fixing bugs and needing regression protection.
- Requirements can be written as explicit input/output acceptance tests.
Workflow
- Red: Write a failing test describing the expected behavior.
- Green: Write the minimal code to make the test pass.
- Refactor: Clean up naming, structure, and duplication.
- Repeat the cycle until acceptance criteria are met.
Ironclad Rules
- Do NOT write massive amounts of features before writing tests.
- Focus on one small goal per cycle.
- All tests MUST pass after refactoring.
© KbWen, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
SKILL.md and 1 other file in .agents/skills/test-driven-development of KbWen/agentic-os.
- SKILL.md
- agents/openai.yaml
Open the folder on GitHubat commit 81a4034
Compare with similar skills
Test Driven Development 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 |
|---|---|---|---|---|---|---|
| Test Driven Development this skillKbWen/agentic-os | 206 | — | ~239 | Automated safety check: Pass | MIT | |
| TDDfossasia/eventyay-interpretation | 1.6k | 28 repos | ~1.1k | Automated safety check: Pass | Apache-2.0 | |
| TDD WorkflowhellangleZ/burn-in-cceverywhere-ralph | 112 | 11 repos | ~2.4k | Automated safety check: Pass | None | |
| TDDsanity-io/sanity | 6.4k | 20 repos | ~1k | Automated safety check: Pass | MIT | |
| Test Driven Developmentfarm-fe/farm | 5.6k | 49 repos | ~2.5k | Automated safety check: Pass | MIT | |
| Tapd Story PipelineTencentBlueKing/bk-bcs | 840 | — | ~2.6k | Automated safety check: Pass | Custom licence |
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Questions about Test Driven Development
What does Test Driven Development do?
Drive changes with Red→Green→Refactor; ensure behavior is verifiable and regression-safe. Test Driven Development is an agent skill from KbWen/agentic-os. Drive changes with Red→Green→Refactor; ensure behavior is verifiable and regression-safe.
When should I use Test Driven Development?
Test Driven Development fits situations like: tasks that involve Test-driven development.
How do I install Test Driven Development in Claude Code?
Run `npx skills add KbWen/agentic-os --skill test-driven-development -a claude-code`. Or copy the skill folder (.agents/skills/test-driven-development in KbWen/agentic-os) into .claude/skills/test-driven-development in your project. Claude Code loads it when a task matches its description.
How do I install Test Driven Development in Codex?
Run `npx skills add KbWen/agentic-os --skill test-driven-development -a codex`. Or copy the skill folder (.agents/skills/test-driven-development in KbWen/agentic-os) into .agents/skills/test-driven-development in your project. Codex loads it when a task matches its description.
Can I use Test Driven Development 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 KbWen/agentic-os --skill test-driven-development -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/test-driven-development, .gemini/skills/test-driven-development, .github/skills/test-driven-development and .opencode/skills/test-driven-development in your project.
What does Test Driven Development need to run?
SKILL.md names no scripts, command-line tools or credentials: Test Driven Development is instructions for the agent only.
Does Test Driven Development 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 Test Driven Development 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 Test Driven Development use?
Test Driven Development is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Test Driven Development use?
About 239 tokens (SKILL.md is roughly 956 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 Test Driven Development?
Skills that share tags, products or a category with Test Driven Development: TDD (fossasia/eventyay-interpretation, 1.6k stars), TDD Workflow (hellangleZ/burn-in-cceverywhere-ralph, 112 stars), TDD (sanity-io/sanity, 6.4k stars) and Test Driven Development (farm-fe/farm, 5.6k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Test Driven Development?
KbWen (a GitHub user) maintains it in KbWen/agentic-os, which has 206 GitHub stars. The repository holds 12 skills in this directory. The repository was last updated on October 6, 2026.
Source: KbWen/agentic-os on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.