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api-contract-validation

Validate frontend and backend API contract consistency and generate a structured report.

Updated Aug 23, 2026
Search Tags:#frontend#api#openapi#validation#backend#contract
One-click install
npx skills add https://github.com/taptap/agents-plugins --skill api-contract-validation-taptap
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: api-contract-validation
Source: https://github.com/taptap/agents-plugins/tree/main/plugins/test/skills/api-contract-validation
Command: npx skills add https://github.com/taptap/agents-plugins --skill api-contract-validation-taptap

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Frontend/backend API contracts often drift during development; this skill validates consistency across frontend changes, backend changes, or OpenAPI specs and outputs a contract report.

Core Features & Use Cases

  • Deep cross-check of frontend and backend definitions, including OpenAPI, with breaking-change detection.
  • End-to-end contract verification suitable for API-first projects, migrations, and refactors.
  • Traceable reporting that supports requirement traceability and audits.

Quick Start

Provide frontend changes (MR/PR or diff) and at least backend changes or an OpenAPI spec, then run the skill to generate api_contract_report.json.

Frequently Asked Questions about api-contract-validation

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I validate API contract consistency between frontend and backend changes?▼

To validate API contract consistency, provide frontend changes via MR/PR diff and backend changes or an OpenAPI spec. The skill cross-checks definitions to produce a structured contract report identifying schema mismatches and breaking changes.

What is API contract drift and how does breaking-change detection work?▼

API contract drift occurs when frontend and backend definitions diverge during development. Breaking-change detection compares schemas across provided diffs and OpenAPI specs to trace incompatible modifications and output a verification report.

Can I use an OpenAPI spec alone to verify frontend API definitions?▼

Yes, an OpenAPI spec can serve as the backend source. You must provide frontend changes via MR/PR diff alongside the OpenAPI spec to enable end-to-end contract verification and generate the report.

What's the best way to automate contract verification for API-first project migrations?▼

For API-first migrations, apply this skill to your frontend and backend changes to automate schema comparison and input validation. It generates a traceable api_contract_report.json suitable for audits and requirement traceability.

Do I need a separate backend diff if I already have an OpenAPI spec for contract validation?▼

No, you do not need a separate backend diff if you have an OpenAPI spec. The skill requires at least backend changes or an OpenAPI spec alongside frontend changes to perform end-to-end validation.

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