What are Claude skills?
A Claude skill is a folder with a SKILL.md file that teaches Claude a procedure for one specific job-to-be-done. The first lines of the file — the frontmatter — describe what the skill does and when to use it. Claude reads that description, decides when it’s relevant, and pulls in the rest of the file on demand.
The shift isn’t just better prompts — it’s how the model finds them. You describe the work in plain English, Claude recognises the pattern, and the right skill activates without you needing to ask. The output is tighter because Claude is executing a deliberate procedure — voice, structure, anti-patterns, and quality bars — instead of guessing.