Is the API Versioning skill free?

Yes. The skill itself is free from wpank/ai. SkillProof publishes the install command and an independent test verdict at no cost.

What is the API Versioning SkillProof Score?

9.2/10 — installs cleanly 5/5, triggers reliably 5/5, output vs. baseline 8/10, docs & honesty 5/5.

How do I install API Versioning?

Copy the install command from this page, run it in your terminal, and restart Claude Code. Skills live in ~/.claude/skills/ (global) or .claude/skills/ inside a project.

Can I use API Versioning with Cursor, Copilot, Gemini CLI, Codex or other AI tools?

The SKILL.md format is native to Claude (Claude Code, Desktop, claude.ai). The instructions inside adapt to other assistants: Cursor rules, GitHub Copilot instructions, Windsurf rules, Custom GPTs, AGENTS.md for OpenAI Codex, and GEMINI.md for Google Gemini CLI — our conversion guides cover each, and the free converter on the tools page does the wrapping for you.

API Versioning

Reference patterns for versioning, deprecating, and migrating REST APIs without breaking clients.

by wpank · wpank/ai

Tested · Works

Install — copy the command Download source ↗

Test report

Verdict: Tested · Works
Score: 9.2/10
Tested: Jul 16, 2026
Environment: Claude Code 2.x (agent harness)
Upstream re-checked: Aug 10, 2026 · 72f3e6a

Applied to a real breaking-change scenario (rename a field, change auth), it produced an exact RFC 8594 Sunset-header spec, a 410-Gone JSON body, and a concrete 12-month public-API deprecation minimum — a generic baseline only gestured at 'communicate the change' without any of that.

Scored on four weighted criteria — install, triggering, output vs. baseline, docs. How scoring works

Installs cleanly 5/5
Triggers reliably 5/5
Output vs. baseline 8/10
Docs & honesty 5/5

What API Versioning does

A pure-knowledge skill covering API versioning strategies (URL path, header, query param, content negotiation), breaking-change classification, deprecation timelines, and migration patterns (adapter/facade). Triggers when evolving an API, planning a breaking change, or managing version/deprecation lifecycles.

How to install API Versioning

git clone https://github.com/wpank/ai
mkdir -p ~/.claude/skills
cp -r ai/skills/api/api-versioning ~/.claude/skills/api-versioning

Skills live in ~/.claude/skills/ (global) or .claude/skills/ (per-project). Restart Claude Code after installing.

Commands — how to trigger API Versioning

/api-versioning Reference patterns for versioning, deprecating, and migrating REST APIs without breaking clients.

It also activates on plain-language prompts like these:

How should I version this REST API before renaming a response field?
Write a deprecation timeline for sunsetting our old API auth method
What's the best way to roll out a breaking API change without upset?

Frequently asked questions

Is the API Versioning skill free?: Yes. The skill itself is free from wpank/ai. SkillProof publishes the install command and an independent test verdict at no cost.
Does API Versioning work with Claude Code?: We tested it with Claude Code 2.x (agent harness) on Jul 16, 2026. Verdict: Tested · Works. Applied to a real breaking-change scenario (rename a field, change auth), it produced an exact RFC 8594 Sunset-header spec, a 410-Gone JSON body, and a concrete 12-month public-API deprecation minimum — a generic baseline only gestured at 'communicate the change' without any of that.
What is the API Versioning SkillProof Score?: 9.2/10 — installs cleanly 5/5, triggers reliably 5/5, output vs. baseline 8/10, docs & honesty 5/5.
How do I install API Versioning?: Copy the install command from this page, run it in your terminal, and restart Claude Code. Skills live in ~/.claude/skills/ (global) or .claude/skills/ inside a project.
Can I use API Versioning with Cursor, Copilot, Gemini CLI, Codex or other AI tools?: The SKILL.md format is native to Claude (Claude Code, Desktop, claude.ai). The instructions inside adapt to other assistants: Cursor rules, GitHub Copilot instructions, Windsurf rules, Custom GPTs, AGENTS.md for OpenAI Codex, and GEMINI.md for Google Gemini CLI — our conversion guides cover each, and the free converter on the tools page does the wrapping for you.