Does it work with specific backend frameworks?

It can analyze routes for various frameworks including Express.js, FastAPI, Django, and Spring Boot by searching for standard routing patterns.

Which API standards does this skill support?

It fully supports OpenAPI 3.0/3.1 (Swagger) and GraphQL Schema Definition Language (SDL).

How does it detect breaking changes?

It compares two versions of a specification to find removed endpoints, changed parameter types, or new required fields that would break existing clients.

Can it generate frontend code?

Yes, it can generate TypeScript interfaces, API client functions, and React Query or SWR hooks directly from your spec files.

Do I need to install external tools?

Basic validation and matching work natively, but the skill can leverage tools like Spectral or GraphQL Inspector if they are available in your environment for enhanced analysis.

API Contract Sync Manager

Name: API Contract Sync Manager
Author: tianzecn

bytianzecn

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API Development

Synchronizes API specifications with backend implementations to detect breaking changes and generate type-safe client code.

The API Contract Sync Manager is a specialized skill for Claude Code designed to bridge the gap between API documentation and codebase reality. It validates OpenAPI, Swagger, and GraphQL schemas against actual route handlers and resolvers, identifies discrepancies like missing endpoints or parameter mismatches, and automatically flags breaking changes before they reach production. By generating TypeScript interfaces and client-side hooks directly from specifications, it streamlines the development workflow for full-stack teams, ensuring that frontend and backend layers remain perfectly aligned throughout the software lifecycle.

Key Features

01Validate OpenAPI and GraphQL schemas for structural correctness and standards compliance

02Generation of type-safe TypeScript interfaces and React Query hooks from API specs

03Detailed API coverage reporting to identify undocumented or unimplemented endpoints

04Automated breaking change detection with categorized impact analysis

051 GitHub stars

06Cross-reference specifications with backend implementations to detect documentation drift

Use Cases

01Ensuring API documentation stays updated during rapid backend development

02Reviewing pull requests to prevent unintentional breaking changes in public APIs

03Scaffolding frontend types and data-fetching logic from a design-first API spec

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add tianzecn/myclaudecode api-contract-sync

For use in Claude.ai and ChatGPT

Download Skill