test-driven-development

test-driven-development is a skill for Claude Code, Codex from 5throck/ai-workspace-standards. It costs 45 tokens per session (2,581 once invoked), scanned A, original, AGPL-3.0.

A development method that writes a failing test first, makes it pass, and then improves the code. This cycle is called Test-Driven Development, or TDD.

In plain words
What is it for?
Use it to develop new features, fix bugs with test coverage, and improve reliability through a test-first workflow.
Why use it?
It makes the expected behavior explicit before implementation and helps catch regressions when code changes later. It is useful for building features and fixing bugs with tests.

Skill for Claude CodeCodex

Which agent this was written for is unclear — body not stored (licence); the path alone says nothing. Also seen: installed under .agents/ (shared by several agents).

Good fit Use it to develop new features, fix bugs with test coverage, and improve reliability through a test-first workflow.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/5throck/ai-workspace-standards/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 5throck/ai-workspace-standards --skill test-driven-development
Clone the repo
git clone --depth 1 https://github.com/5throck/ai-workspace-standards

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/5throck/ai-workspace-standards/test-driven-development/github.svg)](https://agentmods.dev/skills/5throck/ai-workspace-standards/test-driven-development)
Your own site
<a href="https://agentmods.dev/skills/5throck/ai-workspace-standards/test-driven-development"><img src="https://agentmods.dev/badge/skills/5throck/ai-workspace-standards/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/5throck/ai-workspace-standards/test-driven-development"><img src="https://agentmods.dev/badge/skills/5throck/ai-workspace-standards/test-driven-development.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 45 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,581 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 $0.00045 $0.02581
Opus 5 $0.00023 $0.01290
Sonnet 5 $0.00009 $0.00516
Haiku 4.5 $0.00005 $0.00258

Measured 5d ago against content hash a4a31b1078df, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, 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 5d 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.

templates/co-develop/.agents/skills/test-driven-development/SKILL.md · 420 lines

The source is not reproduced here

Licensed AGPL-3.0

The repository is licensed AGPL-3.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

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. 5d ago Changed · +3 lines a4a31b1078df
  2. 7d ago First seen · 417 lines · 45 tokens per session scan A b928524c8365

Subscribe to this mod's changes

test-driven-development is a skill published in the GitHub repository 5throck/ai-workspace-standards (12 stars, last pushed today), licensed AGPL-3.0. It adds 45 tokens to every session and 2,581 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.