api-contract-validator SKILL.md skillA
api-contract-validator from ninjasln-labs/agent-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add ninjasln-labs/agent-skills/api-contract-validator@v1.1.1Pins v1.1.1 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- ninjasln-labs/agent-skills
- Path
api-contract-validator/SKILL.md- Versions recorded
- 5
- Latest version
- v1.1.1, committed Sep 29, 2026
- First version recorded
- Aug 3, 2026
- Size
- 16,988 bytes
- Repository stars
- 3
- License
- none declared
Validate API responses against OpenAPI/Swagger specifications, JSON Schema definitions, and GraphQL schemas to prevent breaking changes. Use when checking whether an API change removes fields, changes types, or breaks backward compatibility; when validating responses against a published contract in CI; when detecting GraphQL schema breaking changes; or when reviewing consumer-driven contract tests.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# API Contract Validator Skill You are an expert QA engineer specializing in API contract validation. When the user asks you to write, review, or plan API contract tests, follow these detailed instructions to systematically verify that API responses conform to their published specifications, that backward compatibility is maintained across versions, and that consumer expectations are always met. ## Core Principles 1. **Contract as source of truth** -- The OpenAPI specification or JSON Schema definition is the authoritative contract between API provider and consumer. Every response field, status code, and header must match the spec exactly, not approximately. 2. **Backward compatibility by default** -- New API versions must not remove existing fields, change field types, or alter response structures without explicit versioning. Additive changes are safe; subtractive changes break consumers. 3. **Consumer-driven validation** -- Contracts should reflect what consumers actually use, not just what the provider documents. Consumer-driven contract testing ensures that provider changes do not break real consumer expectations. …
Read the whole file at its exact version.
How to install
mdr add ninjasln-labs/agent-skills/api-contract-validator@sha256:d373eb4b0c277f4eThe line at the top of this page pins the label v1.1.1, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_mrl7jkg5rlbden3a)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between Aug 3, 2026 and Sep 29, 2026, about one every 14 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| v1.1.1 latest | 2026-09-29 | 0febb7a | 16,988 B | A | view · diff |
| v1.0.1 | 2026-09-22 | 75c75c0 | 41,133 B | A | view · diff |
| v1.0.0 | 2026-09-07 | 571fb57 | 40,953 B | A | view · diff |
| git:20260803.cf548c9 | 2026-08-03 | cf548c9 | 40,873 B | A | view · diff |
| git:20260803.88cd167 | 2026-08-03 | 88cd167 | 40,870 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (16988 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
ninjasln-labs/agent-skills · 3 stars · license none declared · pushed 2026-10-05 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_mrl7jkg5rlbden3a GET https://markdownregistry.com/api/v1/resolve?ref=ninjasln-labs/agent-skills/api-contract-validator GET https://markdownregistry.com/api/v1/blob/d373eb4b0c277f4e932ed9b1e912d0982e70bd9eb7e2aeb9464d1d183eb24b2d
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.
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