skill-development
what it does
This skill should be used when the user wants to "create a skill", "add a skill to plugin", "write a new skill", "improve skill description", "organize skill content", or needs guidance on skill structure, progressive disclosure, or skill development best practices for Claude Code plugins.
also needs
Mentions things that aren’t included:
scripts/init_skill.py(a script)scripts/package_skill.py(a script)
Same request, same model, once with the skill and once without. Read both and judge for yourself.
Claude Sonnet 5.5
made by Anthropic
claude-sonnet-5-5 · revision not reported by the provider
1 try per case · tested 7 Nov 2026
GPT-6.1 Sol
made by OpenAI
gpt-6.1-sol · revision not reported by the provider
1 try per case · tested 7 Nov 2026
example-1
“I'm building a Claude Code plugin for managing database migrations and want to add a skill for it. It should cover writing migration files, rolling back, and handling schema conflicts. Can you help me create the skill, including how to structure the folder and what should go in SKILL.md versus separate reference files?”
example-2
“My plugin has a skill called 'api-testing' but it almost never triggers. The description just says "Helps with API tests." Can you rewrite it so it fires on phrases like "write integration tests for this endpoint" or "mock an API response"? Also, my SKILL.md is about 600 lines long, so please suggest how to split it up using progressive disclosure.”
Download the .zip and unzip it. Put its files, in a folder named skill-development, here:
~/.claude/skills/Every project. For one project only, use .claude/skills/ inside it.~/.agents/skills/Every project. For one repository only, use .agents/skills/ inside it.~/.cursor/skills/Cursor also reads the Claude Code and Codex folders above.Then start a new session and ask for what the skill does. Other agents that read SKILL.md have their own skills folder; check their docs.
Or install from your agent: ask it to install skill-development from Carte Blanche.