The smallest set of rules everyone must agree on.
Proof of work proposes blocks, a UTXO ledger settles them, and every signature that moves value is post-quantum. The chain state is a UTXO set, not a table of account balances, so validation stays deterministic, traceable and parallelisable later. Testnet is live and anyone can join with one command; mainnet stays locked until independent validation closes. Nothing else belongs at this level — that restraint is the feature.
