#SKILL.md articles

Claude Skills Rules | SKILL.md Naming Conventions and the 500-Line Limit

A guide to the rules governing SKILL.md in Claude Skills. Names must be at most 64 characters, using only lowercase alphanumerics and hyphens. Descriptions must be at most 1024 characters and written in third person. The body must stay under 500 lines — the official upper limit — and when splitting is needed, references must be only one level deep. Deeply nested references cause information loss and should be avoided.