Test Driven Development

Test Driven Development is a skill for Claude Code, Codex from ankur-gaurav161418/omniforge. It costs 21 tokens per session (169 once invoked), scanned A, original, MIT.

A development method that writes an automated test before the code that should make it pass. TDD means test-driven development.

In plain words
What is it for?
Writing a failing test, adding the smallest code that passes it, cleaning up the code, and repeating the cycle.
Why use it?
It gives each feature or bug fix a clear expected behavior and helps detect later regressions.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Writing a failing test, adding the smallest code that passes it, cleaning up the code, and repeating the cycle.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/ankur-gaurav161418/omniforge/test-driven-development
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add ankur-gaurav161418/omniforge --skill test-driven-development
Clone the repo
git clone --depth 1 https://github.com/ankur-gaurav161418/omniforge

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for Test Driven Development

README.md
[![agentmods](https://agentmods.dev/badge/skills/ankur-gaurav161418/omniforge/test-driven-development/github.svg)](https://agentmods.dev/skills/ankur-gaurav161418/omniforge/test-driven-development)
Your own site
<a href="https://agentmods.dev/skills/ankur-gaurav161418/omniforge/test-driven-development"><img src="https://agentmods.dev/badge/skills/ankur-gaurav161418/omniforge/test-driven-development/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for Test Driven Development

Your own site · 80×15
<a href="https://agentmods.dev/skills/ankur-gaurav161418/omniforge/test-driven-development"><img src="https://agentmods.dev/badge/skills/ankur-gaurav161418/omniforge/test-driven-development.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 21 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 169 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00021 $0.00169
Opus 5 $0.00010 $0.00084
Sonnet 5 $0.00004 $0.00034
Haiku 4.5 $0.00002 $0.00017

Measured 8d ago against content hash 54a679bf4885, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

Test Driven Development scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 8d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/catalog/test-driven-development/SKILL.md · 20 lines

What it actually says

OmniForge Test Driven Development (TDD) Skill

Purpose

Ensure every feature and bugfix is built on a foundation of automated unit tests.

TDD Cycle

  1. Red: Write a minimal failing test representing expected behavior.
  2. Green: Write minimal production code required to make the test pass.
  3. Refactor: Clean up implementation without altering test behavior.
  4. Repeat: Incrementally expand coverage step by step.
Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 8d ago First seen · 20 lines · 21 tokens per session scan A 54a679bf4885

Subscribe to this mod's changes

Test Driven Development is a skill published in the GitHub repository ankur-gaurav161418/omniforge (0 stars, last pushed 4d ago), licensed MIT. It adds 21 tokens to every session and 169 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

Related

Other skills, from other repositories

tdd

Use this skill to practice test-driven development — writing tests before implementation, using tests to drive design, and validating implementation against pre-written tests. Activates when implementing new functionality, refactoring code, or fixing bugs where regression coverage is needed.

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workflow-patterns

Use this skill when implementing tasks according to Conductor's TDD workflow, handling phase checkpoints, managing git commits for tasks, or understanding the verification protocol.

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taiyi-dev

A software-development stage that implements planned tasks using test-driven development, or TDD: write a failing test, make it pass, then improve the code. It checks the task plan, dependencies, file boundaries, and required completion evidence.

Dong90/oh-my-taiyiforge · 21 tokens

software-test-creation

Write failing tests for a TDD slice based on acceptance criteria and codebase conventions. Use when the "red" phase of red-green-refactor requires tests that define expected behavior before implementation exists. Discovers codebase test conventions first, writes test files that compile or parse but fail because the…

stencila/stencila · 82 tokens

ijfw-tdd

RED-GREEN-REFACTOR enforcement. Use when implementing a feature or bugfix before writing implementation code. Trigger: tdd, test first, red green refactor, /ijfw-tdd.

FerroxLabs/ijfw · 45 tokens

tdd

A Test-Driven Development guide. TDD means writing a failing test first, adding the smallest implementation that passes it, and then improving the code while keeping the tests passing.

Insajin/autopus-adk · 11 tokens