RustSCP

---

🌟 Why RustSCP?

For more than two decades, WinSCP set the gold standard for dual-pane file management on Windows. However, modern engineering teams work across macOS, Linux, and Windows, deploy to cloud-native object stores (S3, Cloudflare R2, MinIO), and orchestrate infrastructure through Autonomous AI Agents.

RustSCP reimagines this legacy with modern systems engineering:

• 🚀 Blazing Native Performance: Built with pure asynchronous Rust (Tokio) and Tauri v2. Consumes under 40 MB of RAM — eliminating the heavy CPU & memory overhead of Electron.
• 🤖 Native AI Gateway (Model Context Protocol / MCP): An audited, sandboxed bastion server allowing LLM agents (Claude Code, Hermes, Antigravity, OpenClaw, Cursor) to safely query, inspect, edit, and run commands on remote infrastructure — with risk classification and human-in-the-loop approvals — without ever exposing raw credentials, private SSH keys, or certificates.
• 🛡️ Guaranteed Memory Safety: Zero segfaults, zero memory leaks, and resilient concurrency guaranteed by Rust's ownership model.
• ⚡ Proactive Dual-Session SSH Architecture: Automatically authenticates an SFTP data channel and an interactive remote shell session during initial login. Execute instantaneous Linux commands (rm -rf, sha256sum, systemctl) without extra logins or latency.

---

📊 Feature Comparison

Feature	RustSCP 🦀	WinSCP 🪟	FileZilla 📁	Cyberduck 🦆
Core Architecture	Safe Rust + Tauri v2	C++ / VCL	C++ / wxWidgets	Java / Cocoa
Memory Footprint	~35 - 45 MB	~40 - 60 MB	~80 - 120 MB	~300 - 500 MB
Native Multiplatform	macOS, Windows, Linux	Windows Only	macOS, Win, Linux	macOS, Windows
AI Agent MCP Gateway	Built-in (Native)	❌ No	❌ No	❌ No
Dual-Pane Commander	Yes (Classic & Modern)	Yes	Split View	❌ Single Pane
SSH Dual-Session Shell	Instant (First Login)	Re-login required	❌ No	❌ No
AWS S3 / R2 / MinIO	Native AWS SigV4	S3 Only	Pro Edition ($)	Yes
Remote Quick-Delete (rm -rf)	Yes (Safe fallback)	Scripting only	❌ Slow file-by-file	❌ Slow file-by-file
Visual Unix Chmod Studio	Real-time Octal Matrix	Basic	Basic	Basic
Built-in Remote Code Editor	Yes (F4 with live save)	External / Basic	External only	External only
Built-in SSH Terminal	Yes (background, history, assistant)	PuTTY (separate app)	❌ No	❌ No
Smart Context Menu	Edge-aware 60 FPS	Standard	Standard	Standard

---

⚡ Key Highlights & Capabilities

🔒 1. Multi-Protocol Engine

• SFTP (SSH File Transfer Protocol): Full SSH2 implementation supporting password auth, private keys (id_rsa, id_ed25519, .pem, PuTTY .ppk), SSH Agent, and chunked high-throughput parallel streaming.
• SCP (Secure Copy): High-speed channel transfer for legacy servers.
• Amazon S3 & Compatible Clouds: Native cryptographic AWS SigV4 engine in HMAC-SHA256. Tested with AWS S3, Cloudflare R2, MinIO, Wasabi, and Backblaze B2.
• FTP / FTPS: TLS-encrypted and standard FTP support.
• Local Filesystem: Native high-speed local disk operations.

🤖 2. Model Context Protocol (MCP) AI Gateway

RustSCP includes an embedded JSON-RPC 2.0 MCP server (rustscp-mcp) acting as a secure bastion:

• Enables AI tools (Claude Code, Hermes, Antigravity, Cursor, OpenClaw) to list directories, read and write files, and run shell commands on the servers you have connected — all through the connection RustSCP already holds.
• Enforces granular permission controls, human-in-the-loop approvals, risk classification, and structured audit logs.
• Never reveals raw SSH credentials or root passwords to the AI model: the agent works over the session you logged in with (password, key, PuTTY .ppk, SSH agent, or OpenSSH certificate), and never sees the secret.

Tools exposed to agents. session_list (the connected sessions, no credentials), fs_list_dir, fs_read_file, fs_write_file (approval-gated), fs_search, render_smart_action (renders a vetted command for review, never executes), and run_command — run a shell command on a connected SSH server and get back the exit code, stdout and stderr.

Connecting an agent. The desktop executable doubles as an MCP stdio server: rustscp-desktop --mcp-stdio speaks MCP on stdin/stdout and forwards tool calls to the running RustSCP window over a private, token-protected local channel (a 0600 Unix socket, or loopback TCP on Windows). The exact command for your install is shown in AI gateway (MCP) inside the app, for example:

claude mcp add rustscp -- /Applications/RustSCP.app/Contents/MacOS/rustscp-desktop --mcp-stdio

Agents see only the remote sessions connected in the app (never the local disk), and every call lands in the activity log (mcp-audit.log in the RustSCP config folder), shown live in the gateway window.

File writes wait until you click Allow in the app (denied after 2 minutes without an answer); a write the agent cancels leaves the dialog at once.

Commands follow a setting you choose per taste in the gateway window, under Commands on the server:

• Off — agents cannot run commands.
• Ask (default) — every command shows up for you to allow before it runs.
• Auto — ordinary commands run on their own; anything RustSCP classifies as dangerous (rm -rf, mkfs, dd of=/dev/…, shutdown, a fork bomb, piping a download into a shell, …) still asks.
• Trusted — full autonomy; every command runs on its own. For throwaway servers only.

Whatever the level, each command is classified (safe / caution / dangerous) and fully recorded. The Allow AI agents switch turns the whole gateway off and on; both choices are kept across restarts.

🔄 3. Dual-Session Proactive SSH Architecture

Unlike traditional tools that disconnect or force a second login prompt when running terminal operations:

• RustSCP initializes both the SFTP file subsystem and an authenticated Shell channel on the initial handshake.
• Remote operations like calculating recursive directory sizes (du -sb), generating SHA-256 hashes, running system commands, or performing fast directory removals (rm -rf) execute instantaneously with zero re-authentication overhead.

🖥️ 4. Commander & Explorer Layouts

• Dual-Pane (Commander Mode): Fast file movement between Local and Remote (or Remote to Remote) using traditional Tab, F5 (Copy), and F6 (Move) workflows.
• Single-Pane (Explorer Mode): Distraction-free navigation with collapsible folder tree.
• Multi-Session Tabs: Open simultaneous connections to multiple servers, clusters, and local drives with automatic reconnection and state recovery.
• Session Memory: Remembers the last active remote directory per site/host upon disconnect or app shutdown (configurable in Settings).

📝 5. Built-in Remote Code Editor (F4 / F3)

• View (F3) and Edit (F4) remote server files directly inside the application.
• Syntax highlighting for over 30 languages (Rust, Go, Python, TypeScript, Shell, JSON, YAML, etc.).
• Line numbers, search/replace (Ctrl+F), and instant remote save (Ctrl+S) over the active SFTP stream.

🛡️ 6. Visual Unix Permissions (chmod) & Hashes

• Comprehensive permissions studio (Alt+Enter): visual checkboxes for Owner, Group, and Public (Read, Write, Execute, Sticky Bit) with bidirectional octal translation (0755, 0644, 0777).
• Integrity verification: compute and compare SHA-256 and MD5 hashes remotely or locally with one click.

🧭 7. Next-Gen Context Menu & UX

• Dynamic Viewport Edge Mapping: The right-click menu detects screen boundaries; flips upwards when near the bottom of the window, and opens submenus to the left when near the right edge.
• Visual Overflow Indicators: Animated "More above" and "More below" indicators with smooth auto-scroll on click.
• Zero-Freeze Guarantee: Isolated rendering lifecycle with global dismiss listeners (Escape, outside click backdrop, window blur).

💻 8. Built-in Terminal (PuTTY-style, beginner-friendly)

• Real interactive shell (xterm-256color PTY) on an SSH connection of its own, so long commands never compete with transfers. Output streams as it arrives; top, nano, vim and colors work.
• Keeps running in the background: hide the panel (Ctrl+`) and the terminals keep going. A slim bar shows each one's state, and a notification (with Show) tells you when a command finishes, fails, or waits for an answer ([Y/n], a sudo password).
• Local command history that survives logging out of the server: every command (with its exit status, duration and folder) is saved on this computer in a private file, searchable per server. Commands typed with a leading space are not saved, as in bash.
• Copy & paste that is easy to see: select to copy (with a "Copied" confirmation), a right-click menu (copy, paste, copy the last command's output, save the output to a file, find), PuTTY's right-click-paste as an option, and a warning before pasting several lines at once.
• Command assistant for people new to Linux: describe the task ("disk space", "restart nginx") to get the right command, see what every option of a command does before running it, a second look before destructive commands (rm -rf /, mkfs, chmod -R 777...), ready-made commands by task (adapted to apt/dnf/apk...), and plain-language hints when a command fails ("not installed: install it", "needs sudo: retry with sudo").
• Command reporting needs bash on the server (the usual login shell on Linux); other shells get the terminal, the assistant and the history of what is run from the assistant.

Open in system terminal starts Terminal.app (macOS), Windows Terminal/ssh.exe or a Linux terminal already logged in like the site: keys that ssh would refuse (a key downloaded from a cloud console such as Oracle OCI, readable by other users) are used through a private copy, the server's known host key is shared with ssh, and a saved password or key passphrase is handed to ssh once through a one-shot local socket (macOS/Linux, OpenSSH 8.4+), never written to disk.

---

🏗️ Architecture

RustSCP is designed as a modular workspace ensuring separation of concerns:

graph TD
    UI[Frontend: React 19 + TypeScript + Tailwind CSS]
    Tauri[Tauri v2 Desktop Bridge - IPC]
    
    subgraph Rust Backend Monorepo
        Desktop[apps/rustscp-desktop: Native Window & Shell]
        Core[crates/rustscp-core: Multi-Protocol Driver Engine]
        Actions[crates/rustscp-actions: Linux Smart Actions Studio]
        Cache[crates/rustscp-cache: High-Speed Directory & Hash Cache]
        MCP[crates/rustscp-mcp: Model Context Protocol AI Gateway]
    end

    UI <-->|Tauri IPC Commands & Events| Desktop
    Desktop --> Core
    Desktop --> Actions
    Desktop --> Cache
    Desktop --> MCP
    
    Core -->|SFTP / SSH Shell| RemoteLinux[Linux / Unix Servers]
    Core -->|AWS SigV4| S3Cloud[AWS S3 / Cloudflare R2 / MinIO]
    Core -->|Local I/O| LocalDisk[Local Filesystem]
    MCP <-->|JSON-RPC 2.0 / Stdio| AIAgents[Claude / Cursor / Hermes / Antigravity]

Crate Breakdown:

• crates/rustscp-core: Core networking, connection pooling, SFTP/SCP/S3/FTP abstractions, and dual-session SSH manager.
• crates/rustscp-actions: Linux Smart Actions catalog, parameter validator, safety level engine (Safe, Warning, Dangerous), and script execution runner.
• crates/rustscp-cache: In-memory and disk caching for directory listings, connection secrets (OS Keychain integration), and file hashes.
• crates/rustscp-mcp: Model Context Protocol (MCP) server implementation exposing tool definitions and resources to LLM agents.
• apps/rustscp-desktop: Tauri v2 application wrapper and React 19 single-page UI.

---

⌨️ Keyboard Shortcuts

Action	macOS 🍏	Windows / Linux 🪟🐧
Switch Panes	Tab	Tab
View File	F3	F3
Edit File	F4	F4
Copy Files	F5	F5
Move / Rename	F6	F6
New Folder	F7	F7
Delete (Move to Trash)	⌘ + ⌫ or F8	Delete or F8
Permanent Delete	⌥ + ⌘ + ⌫	Shift + Delete or Shift + F8
Properties & Chmod	Alt + Enter / ⌘ + I	Alt + Enter
Quick Terminal Command	Ctrl + R	Ctrl + R
Show / Hide Terminals	Ctrl + `	Ctrl + `
New Terminal	Ctrl + Shift + `	Ctrl + Shift + `
Copy / Paste in Terminal	⌘ + C / ⌘ + V (or select to copy)	Ctrl + Shift + C / Ctrl + V
Navigate Up Directory	⌘ + ↑	Alt + ↑
Save in Editor	⌘ + S	Ctrl + S
Close Dialog / Menu	Escape	Escape

---

🚀 Getting Started & Installation

Pre-built Binaries

Download the latest pre-compiled binaries from the Releases page:

• macOS: .dmg installer or .app bundle (supports Apple Silicon aarch64 and Intel x86_64).
• Windows: .msi installer or standalone .exe.
• Linux: .AppImage, .deb, or .tar.gz.

---

Building from Source

Prerequisites

1. Rust: Latest stable toolchain (rustup update stable).
2. Node.js & pnpm: Node.js 20+ and pnpm (corepack enable pnpm).
3. Platform Libraries:
   • macOS: Xcode Command Line Tools (xcode-select --install).
   • Linux (Ubuntu/Debian):

     sudo apt update && sudo apt install -y libwebkit2gtk-4.1-dev build-essential curl wget file libxdo-dev libssl-dev libayatana-appindicator3-dev librsvg2-dev
     

   • Windows: C++ Build Tools and WebView2.

Build Instructions

# 1. Clone the repository
git clone https://github.com/tiagobecker/RustSCP.git
cd RustSCP

# 2. Install UI dependencies
pnpm install

# 3. Run in Desktop Development Mode (with Hot Reload)
pnpm desktop:dev

# 4. Build Optimized Production Release
pnpm release

# 5. Create native installers (.dmg, .msi, .deb, etc.)
pnpm bundle

---

🤝 Contributing

Contributions are warmly welcome! Please check out our Contributing Guidelines and Security Policy before submitting pull requests.

# Run backend test suite
cargo test --all

# Run linting
cargo clippy --workspace --all-targets -- -D warnings
pnpm --dir apps/rustscp-desktop/ui lint

# Build verification
pnpm build

---

📜 License

This project is licensed under the MIT License - see the LICENSE file for details.

Copyright (c) 2026 Tiago Becker.

---