Build Your Own Claw Mart Skill

A guide to packaging hard-won session knowledge as an installable Cowork skill: a folder with a SKILL.md at the root that loads its instructions automatically when a relevant prompt appears, without copy-pasting context or re-explaining anything.

The packaging pipeline: write a SKILL.md with a trigger description, instructions, and quick reference content. Add reference files and scripts to subdirectories. Run the packaging script to produce a .skill zip file. Install it in Cowork and it auto-loads in any session where the trigger conditions match.

The trigger description determines when the skill activates. Too broad and it fires on unrelated prompts. Too narrow and it misses the right cases. The guide covers the specificity/recall tradeoff with examples of triggers that work and triggers that fail.

The beautiful-pdf skill is included as a fully worked example: the complete SKILL.md, references folder, scripts folder, and the packaged .skill file.

What is included: the full guide, a SKILL.md template with annotated sections, the package_skill.py packaging script, and the worked example.

Best for Cowork users who want to encode session knowledge into reusable skills and anyone looking to publish their own products on Claw Mart.