1.2 Core Components
Core Components
The building blocks of every Claude Skill
Every Skill has one essential file: SKILL.md. This is the main instruction file that tells Claude what to do, how to do it, and what output to produce. Beyond this file, a Skill folder may contain supporting materials.
What Goes in a Skill Folder
SKILL.md
The required instruction file. Contains YAML frontmatter, step-by-step workflow, rules, and output format.
Scripts and References
Helper files, API guides, utilities that support the skill during execution.
Templates and Assets
Output templates, sample files, brand assets that define the expected format.
Examples
Sample inputs and expected outputs that Claude learns from during execution.
Example: A Real SKILL.md
--- name: weekly-report description: Generate a formatted weekly report from project data. Use when user asks "create report", "weekly summary" or "status update". --- # Weekly Report Generator ## Instructions 1. Ask the user for the project or time period 2. Gather key achievements, blockers, and next steps 3. Format output using the template below ## Output Template ### Weekly Status Report — [Date] **Achievements:** [list] **Blockers:** [list] **Next Week:** [list] ## Guardrails - Always ask for time period if not specified - Limit each section to 3-5 bullet points max
Key Takeaway
A Skill is a folder with SKILL.md at its core. The YAML frontmatter tells Claude when to activate. The body tells Claude what to do. Supporting files provide detailed how-to knowledge.
SKILL.md a podpůrné soubory vysvětleny.
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