# Class1

Class1 is an AI cost approval layer for pull requests. It estimates monthly LLM cost deltas before merge, reports P50/P90/P95, estimate class, model fit, escalation, footprint, and budget-gate status.

Core pages:
- Overview: {SITE_URL}/
- Product: {SITE_URL}/product.html
- Platform: {SITE_URL}/platform.html
- Ledger: {SITE_URL}/ledger.html
- Trust: {SITE_URL}/trust.html
- Pilot: {SITE_URL}/pricing.html

Source-backed claims:
- takeoff scans code diffs for LLM callsites.
- cost_engine runs paired Monte Carlo and risk decomposition.
- blue_book stores frozen price, spec, capability, and actuals bases.
- policy gate can fail a PR when positive P90 monthly delta exceeds a declared budget.