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api-deprecation-checker

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Catch deprecated APIs early, avoid breaking changes.

Software Engineering#openapi#breaking-changes#code-review#migration-planning#api-deprecation#deprecation-audit#rfc-8594
Authorrobotijn
Version1.0.0
Installs0

System Documentation

What problem does it solve?

This Skill solves the critical problem of teams missing deprecated API, library, and language feature usage, which leads to unexpected outages, breaking changes, and compliance failures when deprecated components are removed without proper warning or migration paths.

Core Features & Use Cases

  • 5-Category Deprecation Defect Detection: Flags missing Sunset headers, past-sunset live endpoints, missing migration guides, removals without deprecation periods, and missing versioning strategies, aligned with RFC 8594 and 9745 standards.
  • Multi-Language Coverage: Includes language-specific best practice checks for C#, Java, Python, C/C++, TypeScript, and SQL, with safe vs bad code examples for each.
  • Use Case: Run this Skill during pre-release code reviews to catch deprecation issues before they ship, or during API migration planning to get a full inventory of deprecated endpoints and their required fixes.

Quick Start

Use the api-deprecation-checker skill to audit your project's API surface for deprecation cycle defects and get a prioritized list of required fixes.

Dependency Matrix

Required Modules

None required

Components

Standard package

💻 Claude Code Installation

Recommended: Let Claude install automatically. Simply copy and paste the text below to Claude Code.

Please help me install this Skill:
Name: api-deprecation-checker
Download link: https://github.com/robotijn/ctoc/archive/main.zip#api-deprecation-checker

Please download this .zip file, extract it, and install it in the .claude/skills/ directory.
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