Writing the expected behavior before the implementation gives you a concrete check for each change and helps prevent regressions.

tdd — Plugin for Claude Code by Parcha-ai/parcha-skills

tdd

tdd is a plugin for Claude Code from Parcha-ai/parcha-skills. Its manifest loads nothing; the 1 skill it bundles cost 33 tokens per session together, scanned A, original, MIT.

A test-first development workflow in which you write a failing test, make it pass, and then improve the code. It also treats bug fixes as regression tests so the same problem does not return.

In plain words

What is it for?: Use it to build features or fix bugs in small vertical slices, with tests written at agreed code boundaries.
Why use it?: Writing the expected behavior before the implementation gives you a concrete check for each change and helps prevent regressions.

Written for Claude Code: a Claude Code plugin manifest.

Good fit Use it to build features or fix bugs in small vertical slices, with tests written at agreed code boundaries.

Compare 6 plugins from other repositories ↓

Install in Claude Code

/plugin marketplace add Parcha-ai/parcha-skills

/plugin install tdd

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.

Clone the repo

git clone --depth 1 https://github.com/Parcha-ai/parcha-skills

Made for: Claude Code.

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.

README.md

[![agentmods](https://agentmods.dev/badge/plugins/parcha-ai/parcha-skills/tdd/github.svg)](https://agentmods.dev/plugins/parcha-ai/parcha-skills/tdd)

Your own site

<a href="https://agentmods.dev/plugins/parcha-ai/parcha-skills/tdd"><img src="https://agentmods.dev/badge/plugins/parcha-ai/parcha-skills/tdd/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.

Your own site · 80×15

<a href="https://agentmods.dev/plugins/parcha-ai/parcha-skills/tdd"><img src="https://agentmods.dev/badge/plugins/parcha-ai/parcha-skills/tdd.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session not measured What this adds to a session before it is invoked.

When invoked not measured The manifest loads nothing itself; its 1 skill cost 33 tokens a session between them.

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.

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 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.

tdd/.claude-plugin/plugin.json · 10 lines

What it actually says

{
  "name": "tdd",
  "version": "0.1.0",
  "description": "Test-driven development at pre-agreed seams: red before green, one vertical slice per cycle, regression-first bug fixes.",
  "author": {
    "name": "Lauren Tan",
    "url": "https://github.com/cursor/plugins/tree/main/pstack/skills/tdd"
  }
}

Contents

What it installs

The manifest is a name and a version. 1 skill travel with it, and installing the plugin installs all of them — 33 tokens a session between them. Each is measured on its own page, and each can be installed alone.

Skill tdd A 33 tokens

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.

1mo ago First seen · 10 lines scan A b3063999b6bc

Subscribe to this mod's changes

tdd is a plugin published in the GitHub repository Parcha-ai/parcha-skills (126 stars, last pushed 15d ago), licensed MIT. Its token cost is not measured: this kind of file is read by the harness, not the model. 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 2026-09-17.

TDD Testing

tdd next to 6 plugins from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
tddParcha-ai/parcha-skills	Plugin	126	15d ago	MIT	A	—	Claude Code
knowledge-virtuosokrzysztofsurdy/code-virtuoso	Plugin	29	11d ago	MIT	A	—	Claude Code
jira-packatretyak1985/swarmery	Plugin	7	2d ago	Apache-2.0	A	—	Claude Code
whetstoneraisedadead/claude-code-plugins	Plugin	3	yesterday	ISC	A	—	Claude Code
superpowers-deepseek-v4gylove1994/superpowers-deepseek-v4	Plugin	10	3mo ago	MIT	A	—	Claude Code
safewordArcadeAI/safeword	Plugin	11	3d ago	none	A	—	Claude Code
humanizerblader/humanizer	Plugin	66k	10d ago	MIT	A	—	Claude Code