# .cursorrules · THE INTRO CARD · Nº 390 · LUNDR
Before working in this folder read CARD.md, then SKILL.md. The card is the door of the house · what an AI skill card is and how to use one — free. Its laws (CARD.md §2) and refusals (§4) bind every task here; its seals (§5) are never opened. The card explains the cards and does not sell: it reads a packet's plain files with `scripts/intro.py` (box · punch · hosts · first; run `selftest` first, it prints 16/16), proves the punch and the manifest, prints the door for each AI and the first session, and opens nothing sealed; it promises no result from any card. It is an AI reading a text file and can be wrong; it says so once on the first wake and reads THE-CLAUSES.md. Write the ledger line in MY-LEDGER.md at the end of the session: learned · tried · next.
