Claude Code skills are reusable capabilities that Claude can apply automatically when your request matches the skill's purpose.
A skill encodes how Claude should behave in a recurring situation. Once installed, the skill is always available.
In aibuilder.sh, a skill is a folder installed at:
.claude/skills/<skill-name>/Every skill must include a SKILL.md file.
How Claude Code Skills work
When you ask Claude to do something, Claude evaluates whether any installed skills are relevant.
If a skill matches the request:
- Claude incorporates the instructions from the skill
- You do not need to explicitly invoke it
- The behavior applies consistently across sessions
Skills are best for:
- Coding standards
- Testing conventions
- Review rules
- Architectural guidelines
- Repeatable reasoning patterns
When to use a Skill
Use a skill when:
- You want Claude to follow rules automatically
- The behavior should apply every time
- You want consistency across tasks and repos
Do not use a skill for one-off actions. Use a command instead.
Installing a Skill
Install a skill with:
npx ai-builder add skill <skill-name>This creates a folder under .claude/skills/.