Contract Test

Q: What is a Claude Code skill and how does the Contract Test skill fit in?

A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Contract Test is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Engineering category. Learn more at https://claudskills.com/learn/what-is-skill-md/.

Category: Engineering · Sub-category: backend · Last updated: 2026-05-21

lang:python

Generate consumer-driven contract tests for APIs. Auto-detects framework (Express, Fastify, NestJS, Django, FastAPI, Go), selects Pact, OpenAPI validation, or schema snapshots, verifies backward compatibility, catches breaking changes before deploy, and configures CI verification. Use when you need to validate API schemas, prevent breaking changes, verify backward compatibility, or set up consumer-driven contracts.

About this skill (catalog notes)

Contract Test includes pricing or quota commentary; at least one code block. At roughly 1,921 words the SKILL.md is on the longer end of the catalog distribution.

Indexed lastmod: 2026-05-21
Catalog position: Engineering · backend
Indexed related skills: 10

How Contract Test fits the catalog

Contract Test sits in the Engineering category under the backend sub-topic in the ClaudSkills catalog. There are 10 related skills indexed alongside it; comparing a few before installing usually reveals which fits your workflow best.

These notes are auto-generated from features detected in the SKILL.md file and from this catalog's structure — they aren't part of the source repository.

From the source SKILL.md

You are in AUTONOMOUS MODE. Do NOT ask questions. Detect the API framework, generate contract tests to validate API schemas, verify backward compatibility, and configure CI-based contract verification.

What this skill does

Contract Test is a community-contributed Claude Code skill in the backend sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/contract-test/ and loads when your prompt matches the skill's trigger.

When to invoke it: Use when you need to validate API schemas, prevent breaking changes, verify backward compatibility, or set up consumer-driven contracts.

Who uses this skill

The Contract Test Claude Code skill is built for software engineers, backend developers, full-stack teams, and technical leads building and maintaining production systems. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 119,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/contract-test
curl -L https://claudskills.com/skills/contract-test/SKILL.md \
  -o ~/.claude/skills/contract-test/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/contract-test/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/contract-test/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\contract-test\SKILL.md on Windows. See the full install guide for step-by-step instructions.

📱 Install from your phone or desktop Telegram

Open @claudskills_bot on Telegram, tap Open Desktop App, and the desktop app installs this skill for you. Or share the bot link with a colleague — they get the same one-tap install. Learn more →

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

Pro

For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.

See pricing → Download desktop app

Frequently asked questions

How do I install the Contract Test Claude Code skill?

Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/contract-test/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.

What does the Contract Test skill do?

Is this skill free to install?

Yes. ClaudSkills is an open registry — every skill keeps its source repository's license, and manual install via copy is free. ClaudSkills Pro ($9/mo, $79/yr, or $149 one-time) adds one-click install via the desktop app and a multi-signal Quality Score.

When should I use the Contract Test skill?

Use Contract Test when your Claude Code task falls under the Engineering category — specifically in the backend area. Claude Code auto-discovers installed skills and invokes the right one based on the task description, so you can also ask Claude directly (e.g. "use Contract Test" or describe the task and let Claude pick). Browse related skills at /category/engineering/.

What is a Claude Code skill and how does the Contract Test skill fit in?

A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Contract Test is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Engineering category. Learn more at /learn/what-is-a-claude-skill/.

Cite this skill

If you reference this skill in a blog post, paper, or documentation, you can cite it as:

APA

ClaudSkills. (2026). Contract Test [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/contract-test/

BibTeX

@misc{contract-test-2026,
  author    = {ClaudSkills},
  title     = {Contract Test [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/contract-test/}
}

Embed this skill

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Part of ClaudSkills — the open registry for Claude Skills & Claude Code Skills. · What's New · Install guide · About · llms.txt

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