# 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: https://class1.1snob.com/
- Product: https://class1.1snob.com/product.html
- Platform: https://class1.1snob.com/platform.html
- Ledger: https://class1.1snob.com/ledger.html
- Trust: https://class1.1snob.com/trust.html
- Pilot: https://class1.1snob.com/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.