hads

Teaches Claude to read, write, and validate HADS (Human-AI Document Standard) Markdown docs using four block types: `**[SPEC]**` (authoritative facts), `**[NOTE]**` (human context), `**[BUG]**` (symptom + fix), and `**[?]**` (unverified). Requires an AI manifest section so models know which blocks to read and which to skip.