Artifact skill: self-describing HTML documents with embedded DSL
Makes documents (roadmaps, logs, notes) as single web pages that carry their own editing instructions, so any person or AI can update them years later.
how it works
Claude designs a per-task DSL; the HTML embeds the grammar, a textarea source pane and a live vanilla-JS renderer, plus a 'copy markdown bundle' for agent handoff; publish/expire slash commands and a daily launchd expiry job.
AI skill: Instructions an AI agent loads when a task calls for them, like a recipe card.