API Evolution & Compatibility Toolkit
Design, extend, document, repair, and retire APIs while preserving compatibility for existing clients. This bundle covers endpoint creation, REST design, documentation, pagination contracts, rate-limit contracts, GraphQL nullability, webhook signatures, and safe API retirement. Use it when APIs evolve across multiple clients and seemingly small contract changes can break integrations, SDKs, automation, or customer workflows.
Works with every agent that reads SKILL.md — Claude Code, Cursor, Codex CLI, Gemini CLI, GitHub Copilot, Windsurf, OpenClaw, and more.
One payment, lifetime access. 8 skills unlock instantly in your library.
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What's included
8 skills
Retire old SaaS API versions without breaking customer integrations or extending support forever.
Automatically add API endpoints to existing projects.
Automatically create accurate API documentation from an existing backend project.
Struggling to design clean API endpoints? This skill generates structured REST API endpoints from a simple feature or product description. It includes routes...
Repair API pagination contract drift in a repo using Cursor.
Repair rate-limit contract drift in a repository using Cursor.
Repair GraphQL nullability drift across schemas, resolvers, loaders, ORM models, generated types, clients, caches, tests, and docs.
Repair webhook-signature contract drift in a repository using Cursor.
See it in action
Retire SaaS APIs Without Breaking Apps
Example session with this skill installed
We need to retire our v1 REST API by December. We have 400 active integrations. The v2 uses OAuth2 instead of API keys. Help me plan the migration and identify risks.
- Read your context and instructions
- Compiled the retire saas apis
API Retirement Decision: Proceed. Risk Score:
7. Summary: High risk due to auth change for 400 consumers. Breaking Change: API Keys to OAuth2 requires customer code updates. Status: Ready for waves.
How to install
Works the same in every agent - Claude, Cursor, Codex, Copilot and 20+ more.
- 1
Download the ZIP
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- 2
Unzip into your skills folder
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- 3
Ask your agent to use it
Restart the agent if it was already running. It picks the skill up automatically - no config needed.
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Click the path to copy it. Create the folder if it does not exist yet.
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