---
title: Lumyn Documentation
description: Quickstart and core concepts for Lumyn, a deterministic decision gateway.
---

# Lumyn docs

Lumyn is a deterministic decision gateway for production AI. Every gated action emits a durable
Decision Record with a verdict (`ALLOW | ABSTAIN | ESCALATE | DENY`), stable reason codes, and
replayable digests.

Start here:

- [Quickstart](/docs/quickstart)
- [v1 semantics](/docs/v1_semantics)
- [Replay guarantees](/docs/replay-guarantees)
- [Memory](/docs/memory)
