스킬 감사 보고서

guard-the-spend-paths 감사 보고서.

When creating or reviewing any endpoint or control that touches money or shared state, two rules apply together. Every endpoint that spends money (LLM, email, SMS, payment) or writes shared state (bookings, slots) gets a per-IP volume cap the day it is created — anyone can POST directly, bypassing the UI. And any guardrail on that path written to fail open (origin allowlist defaulting to permit, auth that skips on a missing header) is inert until explicitly closed, and its failure is silent — name the real primary defence. Does not fire on internal-only endpoints behind service-role auth with no paid upstream; internal fan-out caps belong to lock-at-the-chokepoint.