Small, Hackable Skills for Real Engineering

They split by who invokes them: slash commands like /grill-me orchestrate; model-invoked ones hold discipline the agent reaches for itself. Four failure modes are named: you thought the agent understood and it didn't, so grill until every branch resolves; it uses twenty words where one will do, so distil the project's jargon into a shared CONTEXT.md; the code doesn't work, so red-green-refactor, failing test first; and the ball of mud, so run the architecture survey every few days. The survey hands you candidates; it won't untangle them.