Claude Custom Skills: How to Build, Package and Test Your Own
Updated: 21 hours ago
⚡ TL;DR A custom skill is a folder built around a SKILL.md file with a name and description. Zip it, upload it, enable it, then test with varied prompts and refine the description.
Your team's best process deserves to be repeatable. Claude custom skills let you write it once and have Claude follow it every time.
This is how we build them for clients at Lord Of The Wix. 🧱
🧱 Anatomy of Claude Custom Skills
A custom skill is a folder whose core is a SKILL.md file. The file starts with metadata, a name and a description, followed by the instructions. Larger skills can add reference files or scripts.
📦 Packaging and Uploading
Prepare it for upload:
1️⃣ Zip the folder so it sits at the root of the ZIP, with a matching name
2️⃣ Upload the ZIP
3️⃣ Enable the skill in your Skills settings
🧪 Testing and Refining
Test with varied prompts and look at Claude's reasoning to see whether the skill is triggered. If not, refine the description.
💡 Pro tip The description decides when a skill fires. Write it as "Use when…" with the real words your team types.
✅ Best Practices
Keep skills effective:
🎯 Keep each skill focused on one job
🌱 Start simple and expand
🧾 Include examples of good output
🔁 Test changes incrementally
Claude custom skills turn know-how into a team asset. Need custom skills written and tested? Lord Of The Wix can do it. ✨
❓ Claude custom skills FAQ
What is a Claude custom skill?
A folder centered on a SKILL.md file that teaches Claude a specific procedure.
What goes at the top of SKILL.md?
Metadata with a name and a description.
How do I package a custom skill?
Zip the folder so it sits at the ZIP's root with a matching name.
How do I test a custom skill?
Use varied prompts, check Claude's reasoning and refine the description.
What makes a good custom skill?
A focused scope, a simple start, examples, and incremental testing.
🙏 Credit: This article is based on public information from the Claude Help Center. Claude is a product of Anthropic. Source: support.claude.com.
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