Bringing ABNT2 souls back to life on US Keyboards. 👻

GhostKeys is a Windows System Tray application written in Rust that performs low-level keyboard interception. It allows you to type fluently in Brazilian Portuguese (ABNT2) while keeping your OS in English (US Layout) for coding shortcuts.

It's the best of both worlds: US Layout for Code + ABNT2 for Text.

🎥 Demo

[Link to Video Demo Here]

👻 Features

• Zero Config: Runs in the system tray.
• Positional Mapping: Intercepts physical keys. Type ; to get ç. Type [ to prepare an acute accent (´).
• Safe: Panic-safe implementation ensures your keyboard is never stuck.
• Lightweight: Built in Rust with native Windows API (windows-rs). <5MB RAM.

🚀 Installation

1. Download ghostkeys.exe from Releases.
2. Run it (Allow Windows Defender if it gets scared of ghosts).
3. Look for the Ghost icon in your System Tray.
4. Usage:
   • Press ; (next to L) → Outputs ç
   • Press [ (next to P) → Prepares Accent ´
   • Press ' (next to ;) → Prepares Tilde ~

🧠 How we built it (The Kiro Workflow)

This project was built for Kiroween 2025 using a Spec-Driven Development approach with Kiro.

1. Context-First: We defined the "Positional Mapping" logic in Markdown specs (.kiro/specs/) before writing a single line of Rust.
2. Safety & Speed: We used windows-rs for safe API hooks and cargo-xwin to cross-compile from Linux Containers to Windows 11.
3. Agent Automation: We configured Kiro Agent Hooks (.kiro/hooks.yml) to audit our code safety on every save.
4. MCP: We utilized a static context strategy to ground the LLM in our specific ABNT2 mapping requirements.

🛠️ Tech Stack

• Language: Rust (Stable)
• Core: windows-rs (Win32 Hooks)
• UI: tray-icon + tao
• Dev: Kiro.dev

🔧 Development

Prerequisites

Using DevContainer (Recommended): Open in VS Code/Kiro with the Dev Containers extension. All dependencies are pre-installed.

Manual Setup (Linux/WSL):

# Install system dependencies
sudo apt-get update && sudo apt-get install -y \
    libx11-dev libxcb1-dev libxkbcommon-dev pkg-config \
    libxi-dev libxtst-dev libxrandr-dev libxcursor-dev \
    libgtk-3-dev clang lld libxdo-dev libayatana-appindicator3-dev

# Install Rust tools
cargo install cargo-xwin just git-cliff

Task Runner

We use just as our task runner (like npm scripts):

# Install just
cargo install just

# See all available commands
just

# Common tasks
just build              # Build debug
just build-release      # Build release
just build-windows      # Cross-compile to Windows
just test               # Run tests
just lint               # Run clippy
just fmt                # Format code
just ci                 # Run all CI checks

Building

# Linux (native)
cargo build --release

# Windows (cross-compile from Linux)
cargo xwin build --target x86_64-pc-windows-msvc --release

# Output: target/x86_64-pc-windows-msvc/release/ghostkeys.exe

Testing

cargo test                    # Run all tests
cargo test -- --nocapture     # With output
just test-verbose             # Same as above

📦 Release Process

Releases are automated via GitHub Actions. To create a release:

git tag v1.0.0
git push origin v1.0.0

This triggers the workflow that:

1. Builds ghostkeys.exe on Windows
2. Generates changelog from commits
3. Creates SHA256 checksum
4. Publishes GitHub Release

📄 License

Apache-2.0 - See LICENSE for details.