# RFC-0009: Event Ledger Primitive

**Status:** Draft \| **Updated:** 2026-02-17

## Properties

-   Append-only
-   Hash-chained per stream
-   Schema-validated
-   Tamper-evident
-   Supports proof construction for policy enforcement

## Envelope

Each event includes: id, ts, stream_id, type, body, prev_hash, hash.