XerahS

Why it's ranked here

XerahS combines a broad capture pipeline with unusually capable annotation, upload routing, and agent integration. The core desktop journey is implemented, not merely proposed. Still, the project calls itself active and experimental, with incomplete platform verification and several automation gaps. It suits engineers willing to trade maturity for wider platform reach and deeper workflow control.

What's good

The editor supports object-based annotations, undo and redo, real-time effects, and GPU-backed rendering. Independent workflow settings make hotkey behavior explicit and prevent changes from leaking between profiles. Upload destinations load through plugins and can route by file type. Linux receives serious attention through XDG storage, desktop portals, native fallbacks, diagnostics, and multiple recording backends. MCP support controls the real desktop runtime instead of wrapping a thin command interface.

Tradeoffs

Building requires the .NET 10 SDK, specific Node.js versions, and two initialized Git submodules. Mobile support remains experimental. Platform behavior varies: macOS needs further on-device hardening, while Wayland capabilities depend on compositor portals and installed recording tools. Some editor regression tests are excluded, and full cross-platform verification matrices remain unfinished. Automatic URL shortening and several after-capture or after-upload actions are also incomplete.

How to use it well

Choose XerahS for a capture-heavy desktop workflow where screenshots need repeatable annotation, local history, clipboard handling, and destination-specific uploads. Define separate workflows for distinct hotkeys and outputs instead of treating one profile as a universal default. Its local MCP mode fits desktop agents that need permissioned access to capture and history. It does not replace a hosted cloud capture service, and remote MCP access still requires a reachable desktop runtime.

Observed

Primary implementation

C# on .NET 10, using Avalonia UI and SkiaSharp

Desktop platforms

Windows, Linux, and macOS

Mobile platforms

Experimental .NET MAUI applications for Android and iOS

Install and packaging

Release packaging covers Windows, Linux x64 and arm64, and macOS x64 and arm64; Arch Linux also has a community AUR development package

Interfaces

Desktop application plus an MCP server supporting local stdio and authenticated HTTP with SSE

Build structure

Desktop builds require ShareX.ImageEditor and ShareX.VideoEditor Git submodules

Testing structure

A test project covers core helpers, upload configuration, hotkeys, Linux capture orchestration, and coordinate transforms; two legacy editor regression scenarios are excluded