tdd

tdd is a skill for Claude Code, Codex from joryeugene/tripod. It costs 32 tokens per session (1,492 once invoked), scanned A, original, no licence file.

A test-first development workflow requiring a failing test before new code is written, including tests that describe existing behaviour before refactoring.

In plain words
What is it for?
Writing tests and implementing features with test-driven development (TDD), or safely refactoring code by first recording how it currently behaves.
Why use it?
It helps catch incorrect assumptions early and provides a clear check that each change works.

Skill for Claude CodeCodex

Part of the tripod plugin — 25 skills, 1 hook shipped together

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.

agentmods
npx agentmods add skills/joryeugene/tripod/tdd
Any agent
npx skills add joryeugene/tripod --skill tdd
Clone the repo
git clone --depth 1 https://github.com/joryeugene/tripod

Made for: Claude Code, Codex.

Or install tripod, the plugin that ships this one along with the rest of its 25 skills, 1 hook.

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 tdd

README.md
[![agentmods](https://agentmods.dev/badge/skills/joryeugene/tripod/tdd.svg)](https://agentmods.dev/skills/joryeugene/tripod/tdd)
Your own site
<a href="https://agentmods.dev/skills/joryeugene/tripod/tdd"><img src="https://agentmods.dev/badge/skills/joryeugene/tripod/tdd.svg" alt="Measured on agentmods" height="20"></a>
Per session 32 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,492 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00032 $0.01492
Opus 5 $0.00016 $0.00746
Sonnet 5 $0.00006 $0.00298
Haiku 4.5 $0.00003 $0.00149

Measured 4d ago against content hash 0d3710bb4475, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

tdd 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/tdd/SKILL.md · 173 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 · 173 lines · 32 tokens per session scan A 0d3710bb4475

Subscribe to this mod's changes

tdd is a skill published in the GitHub repository joryeugene/tripod (2 stars, last pushed 4d ago), with no licence file. It adds 32 tokens to every session and 1,492 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 2026-08-31.

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