---
title: Platform
description: Authentication, users, branches, the audit log, the sync protocol, and image uploads.
---

This section covers the shared platform every feature builds on: who you are, where you work, what changed, and how offline clients stay in sync.

**[Authentication and users](/platform/authentication-and-users)**

Login, the JWT shape, role checks, and user management.

**[Branches](/platform/branches)**

Creating branches and how scoping keeps data in its branch.

**[Audit log](/platform/audit-log)**

The append-only audit trail and how to query it.

**[Sync protocol](/platform/sync-protocol)**

Device registration, push replay, pull filtering, and snapshots in detail.

**[Images and branding](/platform/images-and-branding)**

Presigned S3 uploads for medicine photos and the org logo.