Claude Skill Builder

📚 Sample Library

Click any sample to pre-fill the form with a proven pattern, then adapt it to your workflow. Filter by department.

1 · Identity (YAML frontmatter)

Skill name*

Lowercase letters, numbers and hyphens only (kebab-case). This becomes the skill's folder name.

Use kebab-case: lowercase letters, numbers, hyphens (e.g. invoice-processor).

Description — when should Claude trigger this skill?*

The single most important field. State what the skill does AND the exact phrases/situations that should trigger it. Claude reads only this to decide when to use the skill.

0/1024

Department / category

2 · Core Instructions

Goal — what does this skill accomplish?*

One or two sentences. What is the finished deliverable and who is it for?

Process — how should Claude do the work?*

Numbered steps, one per line. Be specific: what to read first, what to compute, what order, what to verify.

Output format — what should the result look like?*

Exact structure of the deliverable: file type, sections, headings, length, tone.

Rules & constraints*

Hard boundaries, one per line. What must Claude always/never do? Tone rules, data rules, length limits, approvals needed.

Examples — show good (and bad) output*

At least one concrete example of correct output. Optionally a bad example with why it fails. Examples teach more than instructions.

Step-by-step guide for the user

How does a teammate actually use this skill? What do they upload/say, and what do they get back?

3 · Optional Extras

Trigger phrases

Comma-separated phrases users say to activate this skill. Woven into the description and listed in the file.

Required inputs / tools

Files, connectors, or data this skill needs (e.g. CRM CSV export, Slack access, brand guidelines doc).

Edge cases & failure handling

What should Claude do when inputs are missing, malformed, or ambiguous?

Skill quality check 0/8

Live preview

Install your skill: download the .zip and upload it in Claude via Settings → Capabilities → Skills → Add Skill → Upload Skill — done. For Claude Code, unzip it into .claude/skills/. The .zip already contains the correctly named folder with SKILL.md inside. The skill is reusable — Claude triggers it automatically whenever the description matches.

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📚 Sample Library

Skill quality check 0/8

Live preview

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