Agent skill

TDD Cycle

by modimihir07 in modimihir07/agentic-os

Red-Green-Refactor test-driven development cycle. An agent skill from modimihir07/agentic-os.

MITAuto-check passedTesting & QA

Install TDD Cycle

skills CLI

$ npx skills add modimihir07/agentic-os --skill tdd-cycle -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI

$ gh skill install modimihir07/agentic-os tdd-cycle --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy

$ git clone --depth 1 https://github.com/modimihir07/agentic-os.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/tdd-cycle .claude/skills/tdd-cycle && rm -rf skills-src

Use ~/.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/

Paste into Claude Code

Install the "tdd-cycle" agent skill from https://github.com/modimihir07/agentic-os/tree/main/skills/tdd-cycle into .claude/skills/tdd-cycle/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tdd-cycle", 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

$skill-installer install https://github.com/modimihir07/agentic-os/tree/main/skills/tdd-cycle

Type 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.

skills CLI

$ npx skills add modimihir07/agentic-os --skill tdd-cycle -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install modimihir07/agentic-os tdd-cycle --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/modimihir07/agentic-os.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/tdd-cycle .agents/skills/tdd-cycle && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "tdd-cycle" agent skill from https://github.com/modimihir07/agentic-os/tree/main/skills/tdd-cycle into .agents/skills/tdd-cycle/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tdd-cycle", 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.

skills CLI

$ npx skills add modimihir07/agentic-os --skill tdd-cycle -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install modimihir07/agentic-os tdd-cycle --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/modimihir07/agentic-os.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/tdd-cycle .cursor/skills/tdd-cycle && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "tdd-cycle" agent skill from https://github.com/modimihir07/agentic-os/tree/main/skills/tdd-cycle into .cursor/skills/tdd-cycle/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tdd-cycle", 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

$ gemini skills install https://github.com/modimihir07/agentic-os.git --path skills/tdd-cycle

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add modimihir07/agentic-os --skill tdd-cycle -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install modimihir07/agentic-os tdd-cycle --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/modimihir07/agentic-os.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/tdd-cycle .gemini/skills/tdd-cycle && rm -rf skills-src

Use ~/.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/

Paste into Gemini CLI

Install the "tdd-cycle" agent skill from https://github.com/modimihir07/agentic-os/tree/main/skills/tdd-cycle into .gemini/skills/tdd-cycle/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tdd-cycle", 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.

GitHub CLI

$ gh skill install modimihir07/agentic-os tdd-cycle

Installs 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).

skills CLI

$ npx skills add modimihir07/agentic-os --skill tdd-cycle -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/modimihir07/agentic-os.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/tdd-cycle .github/skills/tdd-cycle && rm -rf skills-src

Use ~/.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/

Paste into GitHub Copilot

Install the "tdd-cycle" agent skill from https://github.com/modimihir07/agentic-os/tree/main/skills/tdd-cycle into .github/skills/tdd-cycle/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tdd-cycle", 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.

skills CLI

$ npx skills add modimihir07/agentic-os --skill tdd-cycle -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install modimihir07/agentic-os tdd-cycle --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/modimihir07/agentic-os.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/tdd-cycle .opencode/skills/tdd-cycle && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "tdd-cycle" agent skill from https://github.com/modimihir07/agentic-os/tree/main/skills/tdd-cycle into .opencode/skills/tdd-cycle/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tdd-cycle", 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-cycle
GitHub stars: 193
Token cost: ~232 tokens
SKILL.md length: 117 words
Files: 4
Skills in repo: 12
Repo updated: Aug 11, 2026
First seen: Oct 7, 2026
Licence: MIT

At a glance

Red-Green-Refactor test-driven development cycle. An agent skill from modimihir07/agentic-os.

Works in 6 steps: RED: Write a failing test for the… → Verify test fails (confirm test is valid) → GREEN: Write minimal code to make the… → …
Tasks that involve Test-driven development
SKILL.md covers Description, When to Use, Process and Rules, plus 1 more section
Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

TDD Cycle is an agent skill from modimihir07/agentic-os. Red-Green-Refactor test-driven development cycle

Its SKILL.md is about 230 tokens, which your agent loads only when the skill is triggered. The skill folder holds 3 other files (for example `eval.json`, `learnings.md` and `score-history.json`).

It sits in Testing & QA, covering Test-driven development. The repository describes itself as: Agentic OS: Multi-agent orchestration platform for opencode, Hermes & Gemini CLI. Skills hub, scheduler, cost analytics, memory & backup. The licence is MIT.

When your agent uses it

Tasks that involve Test-driven development

Example prompts

“/tdd-cycle”

Workflow steps

6 steps, taken from the first numbered list in SKILL.md.

RED: Write a failing test for the desired behavior
Verify test fails (confirm test is valid)
GREEN: Write minimal code to make the test pass
Verify test passes
REFACTOR: Clean up code while keeping tests green
Commit with message format: RED|GREEN|REFACTOR: description

What it can do on your machine

Read from SKILL.md and the folder at commit c7ebbb4. 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

TDD Cycle loads about 232 tokens when it runs. Until then it costs about 15 tokens; SKILL.md has 117 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~15
When it runs · the whole SKILL.md, loaded when a task matches: ~232

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 modimihir07/agentic-os at commit c7ebbb4, republished under its MIT licence (© modimihir07). 117 words, ~232 tokens.

Download SKILL.mdSave it as .claude/skills/tdd-cycle/SKILL.md (or your agent's skills folder). This skill also uses 3 other files; get the full folder from GitHub.

name: tdd-cycle
description: Red-Green-Refactor test-driven development cycle
version: 1.0.0
author: Agentic OS
tags: testing, tdd, quality, development

TDD Cycle

Description

Enforces the Red-Green-Refactor TDD cycle: write a failing test, make it pass, then refactor. No code is written before a test exists.

When to Use

When implementing any new feature
When fixing a bug
When refactoring existing code

Process

RED: Write a failing test for the desired behavior
Verify test fails (confirm test is valid)
GREEN: Write minimal code to make the test pass
Verify test passes
REFACTOR: Clean up code while keeping tests green
Commit with message format: RED|GREEN|REFACTOR: description

Rules

Production code is only written to make a failing test pass
Delete any code written before tests
Never skip the RED phase

Agent Assignment

Primary: opencode

Files

SKILL.md and 3 other files in skills/tdd-cycle of modimihir07/agentic-os.

SKILL.md
eval.json
learnings.md
score-history.json

Open the folder on GitHubat commit c7ebbb4

Compare with similar skills

TDD Cycle 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.

TDD Cycle compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
TDD Cycle this skillmodimihir07/agentic-os	193	—	~232	Automated safety check: Pass	MIT	1 mo ago
TDDpietheinstrengholt/rssmonster	564	30 repos	~906	Automated safety check: Pass	MIT	yesterday
TDD WorkflowhellangleZ/burn-in-cceverywhere-ralph	112	11 repos	~2.4k	Automated safety check: Pass	None	8 mo ago
TDDsanity-io/sanity	6.4k	20 repos	~1k	Automated safety check: Pass	MIT	today
Test Driven Developmentfarm-fe/farm	5.6k	51 repos	~2.5k	Automated safety check: Pass	MIT	17 days ago
Tapd Story PipelineTencentBlueKing/bk-bcs	841	—	~2.6k	Automated safety check: Pass	Custom licence	yesterday

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Questions about TDD Cycle

What does TDD Cycle do?

Red-Green-Refactor test-driven development cycle. An agent skill from modimihir07/agentic-os. TDD Cycle is an agent skill from modimihir07/agentic-os.

When should I use TDD Cycle?

TDD Cycle fits situations like: tasks that involve Test-driven development.

How do I install TDD Cycle in Claude Code?

Run `npx skills add modimihir07/agentic-os --skill tdd-cycle -a claude-code`. Or copy the skill folder (skills/tdd-cycle in modimihir07/agentic-os) into .claude/skills/tdd-cycle in your project. Claude Code loads it when a task matches its description.

How do I install TDD Cycle in Codex?

Run `npx skills add modimihir07/agentic-os --skill tdd-cycle -a codex`. Or copy the skill folder (skills/tdd-cycle in modimihir07/agentic-os) into .agents/skills/tdd-cycle in your project. Codex loads it when a task matches its description.

Can I use TDD Cycle 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 modimihir07/agentic-os --skill tdd-cycle -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-cycle, .gemini/skills/tdd-cycle, .github/skills/tdd-cycle and .opencode/skills/tdd-cycle in your project.

What does TDD Cycle need to run?

SKILL.md names no scripts, command-line tools or credentials: TDD Cycle is instructions for the agent only.

Does TDD Cycle 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 Cycle 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 Cycle use?

TDD Cycle 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 TDD Cycle use?

About 232 tokens (SKILL.md is roughly 928 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 Cycle?

Skills that share tags, products or a category with TDD Cycle: TDD (pietheinstrengholt/rssmonster, 564 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 TDD Cycle?

modimihir07 (a GitHub user) maintains it in modimihir07/agentic-os, which has 193 GitHub stars. The repository holds 12 skills in this directory. The repository was last updated on August 11, 2026.

Source: modimihir07/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.

TDD Cycle

Install TDD Cycle

Facts

At a glance

What it does

When your agent uses it

Example prompts

Workflow steps

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

TDD Cycle

Description

When to Use

Process

Rules

Agent Assignment

Files

Compare with similar skills

Similar skills

TDD

TDD Workflow

TDD

Test Driven Development

Tapd Story Pipeline

Absolute Init

More from modimihir07/agentic-os

Code Review

Cost Analytics

Daily Standup

Devops Audit

Goal Planner

Heartbeat

Questions about TDD Cycle

Install TDD Cycle

Facts

At a glance

What it does

When your agent uses it

Example prompts

Workflow steps

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

TDD Cycle

Description

When to Use

Process

Rules

Agent Assignment

Files

Compare with similar skills

Similar skills

More from modimihir07/agentic-os

Related

Questions about TDD Cycle