---
id: glossary
type: glossary
layer: L1
title: System terminology
authority: canonical
owner: cto
durability: long-lived
classification: internal
canonical_source: true
updated: 2026-08-01T00:00:00Z
---

- **Edge** — the request-routing tier. Stateless.
- **Core** — the transactional service. Owns the database.
- **Ledger** — append-only financial record. Never updated in place.