Engineering judgment for code and product work.

markskill helps AI agents and assistants understand the problem, choose the right scope of change, and show what the evidence supports.

npx skills add thedevmark/markskill -g Read the skill

What it covers

Shared rules with focused references.

Start with the user's goal and the observed behavior. Keep sound structure; repair, restructure, or replace what prevents the required result.

Trace invariants, callers, state, and data before changing the owner. Preserve validation, authorization, recovery, and useful regression evidence.

Work from real content, established components, and the states people will encounter. Change layout, interaction, and copy where they get in the way.

Separate source inspection, tests, rendered behavior, and production checks. Report what each check actually established.