test-driven-development

test-driven-development is a skill for Claude Code, Codex from raphaelmansuy/edgecrab. It costs 33 tokens per session (2,279 once invoked), scanned A, original, no licence file.

A test-first development workflow for implementing features and bug fixes. It follows the RED-GREEN-REFACTOR cycle: write a failing test, make it pass, then improve the code.

In plain words
What is it for?
Use it when adding a feature or fixing a bug with tests written before the implementation code.
Why use it?
It helps define the expected behavior before implementation and provides a check that the change works.

Skill for Claude CodeCodex

Which agent this was written for is unclear — body not stored (licence); the path alone says nothing.

Good fit Use it when adding a feature or fixing a bug with tests written before the implementation code.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/raphaelmansuy/edgecrab/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 raphaelmansuy/edgecrab --skill test-driven-development
Clone the repo
git clone --depth 1 https://github.com/raphaelmansuy/edgecrab

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/raphaelmansuy/edgecrab/test-driven-development.svg)](https://agentmods.dev/skills/raphaelmansuy/edgecrab/test-driven-development)
Your own site
<a href="https://agentmods.dev/skills/raphaelmansuy/edgecrab/test-driven-development"><img src="https://agentmods.dev/badge/skills/raphaelmansuy/edgecrab/test-driven-development.svg" alt="Measured on agentmods" height="20"></a>
Per session 33 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,279 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 unknown 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 $0.00033 $0.02279
Opus 5 $0.00016 $0.01140
Sonnet 5 $0.00007 $0.00456
Haiku 4.5 $0.00003 $0.00228

Measured 4d ago against content hash 17c9a9937108, 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 4d 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/software-development/test-driven-development/SKILL.md · 343 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

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. 4d ago First seen · 343 lines · 33 tokens per session scan A 17c9a9937108

Subscribe to this mod's changes

test-driven-development is a skill published in the GitHub repository raphaelmansuy/edgecrab (85 stars, last pushed 1mo ago), with no licence file. It adds 33 tokens to every session and 2,279 once invoked, about $0.0002 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 2026-09-03.

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