Safety and invariants

List what must not break no matter what, the thresholds you refuse to cross, the smallest safe dose and how far it reaches, how you would undo it, who eats the damage if you are wrong, and what triggers escalation.

List what must not break no matter what, the thresholds you refuse to cross, the smallest safe dose and how far it reaches, how you would undo it, who eats the damage if you are wrong, and what triggers escalation.

Example

Protected: rent paid, marriage intact. One-way door: telling your spouse it is decided. Safe dose: cancel three subscriptions, not eight, this month only. Rollback: resubscribe within 30 days. Downside falls on your spouse, so she gets a veto.