Let's build your first skill. Create a directory at ~/.openclaw/skills/hello-world/ and add a SKILL.md file:
---
name: hello-world
description: Greet the user by name
requires: {}
os: []
---
Below the frontmatter, write the instructions OpenClaw should follow when the skill is invoked. Restart OpenClaw and type "use hello-world" to confirm it appears. If it doesn't show up, run openclaw skills check hello-world to see which requirement failed.