Mobile Compatibility Matrix

This page tracks headline compatibility for Mattermost clients.

For implementation details, protected paths, and contract testing workflow:

• See Compatibility Scope
• See Development Compatibility Guide

Current Headline Coverage

Scope	Coverage	Last Audited
Mobile-critical endpoints	39/41 (95.1%)	2026-03-17

Known Gaps

Endpoint	Status	Impact	Planned
POST /api/v4/emoji	Not implemented	Custom emoji upload unavailable	Phase 2
POST /api/v4/posts/search	Not implemented	Advanced post search unavailable	Phase 2

Notes

• The mobile-critical metric is not the same as full Mattermost API v4 coverage.
• Full v4 surface analysis remains lower because RustChat intentionally focuses on mobile and desktop client viability first.