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test-driven-development

test-driven-development is a skill for Claude Code, Codex from sodiumjoe/dotfiles. It costs 17 tokens per session (2,409 once invoked), scanned A, original, no licence file.

A software-development method called test-driven development, or TDD, where tests are written before the feature or fix.

In plain words
What is it for?
It guides feature and bug-fix work by requiring tests before implementation code.
Why use it?
It gives the implementation a clear expected behaviour and helps catch regressions while coding.

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).

not rated 49repo changed 1mo ago A scan 17 tokens no licence

Good fit It guides feature and bug-fix work by requiring tests before implementation code.

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

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/sodiumjoe/dotfiles/test-driven-development/github.svg)](https://agentmods.dev/skills/sodiumjoe/dotfiles/test-driven-development)
Your own site
<a href="https://agentmods.dev/skills/sodiumjoe/dotfiles/test-driven-development"><img src="https://agentmods.dev/badge/skills/sodiumjoe/dotfiles/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/sodiumjoe/dotfiles/test-driven-development"><img src="https://agentmods.dev/badge/skills/sodiumjoe/dotfiles/test-driven-development.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 17 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,409 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 $0.00017 $0.02409
Opus 5.5 $0.00007 $0.00964
Sonnet 5.5 $0.00003 $0.00482
Haiku 4.5 $0.00002 $0.00241

Measured 1mo ago against content hash e68809538d77, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, 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 1mo 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.

home/.agents/skills/test-driven-development/SKILL.md · 334 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

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 1mo ago Changed · -41 lines e68809538d77
  2. 2mo ago First seen · 375 lines · 17 tokens per session scan A c96a04af208e

Subscribe to this mod's changes

test-driven-development is a skill published in the GitHub repository sodiumjoe/dotfiles (49 stars, last pushed 3d ago), with no licence file. It adds 17 tokens to every session and 2,409 once invoked, about $0.0001 per session on Opus 5.5. 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 2026-08-30.

TDDTestingdotfilesmac-setupshell
Related

test-driven-development compared with skills from other repositories

test-driven-development next to 6 skills from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
test-driven-developmentsodiumjoe/dotfilesSkill493d agononeA17Claude Code, Codex
mbo-plansfc-gh-eraigosa/dotfilesSkill53yesterdayApache-2.0A260Claude Code, Codex
wear-widgetithinkihaveacat/dotfilesSkill48todayApache-2.0A99Claude Code, Codex
pr-groomingsfc-gh-eraigosa/dotfilesSkill53yesterdayApache-2.0A147Claude Code, Codex
taskgoithinkihaveacat/dotfilesSkill48todayApache-2.0A71Claude Code, Codex
herdrsfc-gh-eraigosa/dotfilesSkill53yesterdayApache-2.0A91Claude Code, Codex
issue-groomingsfc-gh-eraigosa/dotfilesSkill53yesterdayApache-2.0A140Claude Code, Codex