# Architecture Overview

The T81 stack layers:

1. T81Lang — Base‑81‑native language with T81BigInt, T81Float, T81Fraction and deterministic semantics.
2. TISC — Ternary instruction set with modular arithmetic, tensor ops, and recursive control.
3. T81VM — Deterministic runtime/JIT with tier promotion: T81 → T243 → T729 → T2187 → T6561 → T19683.
4. Hanoi Kernel — Deterministic, capability‑native microkernel with an 81‑slot scheduler and ethics‑first boot.
5. CanonFS — Immutable, content‑addressed filesystem using CanonHash‑81, CapabilityGrant v2, CanonParity, and CanonLink.
6. Axion Governor — Immutable, non‑self‑modifying AI that enforces Θ‑overlays, monitors entropy, vetoes unsafe transitions, and orchestrates snapshot/rollback.

All durable state MUST reside in CanonFS. Syscalls are total, deterministic, and subject to Axion veto.