KeyLint

Fix text instantly with AI — one hotkey, perfect writing.

Perfect for professional emails, chat messages, documents, and social media posts. No more copy-pasting between tools — KeyLint fixes your text instantly, wherever you're typing.

How It Works

Select text in any app
Press Ctrl+G
Fixed. Your text is corrected and written back — no window, no interruption.

Features

Feature	Description
Silent Fix	Press the hotkey — clipboard text is fixed and written back. No window, no copy-paste loop.
Deep Enhance	Open the enhancement panel to rewrite for tone, brevity, or formality. Preview before replacing.
BYOK	Bring your own API key. Keys stay in your OS keyring and never leave your machine.
Multilingual	Detects the language and corrects without translating. English stays English, German stays German.
System Tray	Lives quietly in your system tray. Uses minimal resources.
Private	All API calls go through the local Go backend. No telemetry, no cloud sync, no clipboard history stored.

Supported AI Providers

OpenAI (GPT-4o, GPT-4, etc.)
Anthropic (Claude)
Ollama (local, fully offline)
AWS Bedrock (Claude, Titan, etc.)

Installation

Download the latest release from keylint.io or the Releases page
Run the installer
Launch KeyLint — the welcome wizard walks you through choosing a provider and entering your API key
Press Ctrl+G on any selected text

Contributing

Contributions are welcome! Please open an issue or submit a pull request.

License

MIT + Commons Clause — see LICENSE for details.

Development

Stack

Layer	Technology
Desktop runtime	Wails v3 (Go)
Backend language	Go 1.26
Dependency injection	Wire
Frontend	Angular v21
UI components	PrimeNG v21 (Aura preset, orange/zinc theme)

Prerequisites

Go 1.26+
Node.js 24 LTS
Wails v3 CLI: go install github.com/wailsapp/wails/v3/cmd/wails3@latest
Linux: sudo apt install libgtk-3-dev libwebkit2gtk-4.1-dev
Windows cross-compilation from Linux: sudo apt install gcc-mingw-w64

Build & Run

# Hot-reload dev server (Angular + Go)
wails3 dev

# Build frontend only
cd frontend && npm run build

# Build production binary (Linux)
go build -tags production -o bin/KeyLint .

# Windows cross-compilation
GOOS=windows GOARCH=amd64 CGO_ENABLED=1 CC=x86_64-w64-mingw32-gcc \
  go build -tags production -ldflags="-w -s -H windowsgui" -o bin/KeyLint.exe .

Testing

# Frontend unit tests (Vitest)
cd frontend && npm test

# Go unit tests
go test ./internal/...

# E2E tests (requires ng serve on :4200)
npx playwright test

Wire DI Regeneration

go install github.com/google/wire/cmd/wire@latest
wire gen ./internal/app/
wails3 generate bindings

Project Structure

KeyLint/
├── main.go                         # Entry point — CLI flags, Wails app setup
├── internal/
│   ├── app/                        # Wire DI (wire.go + wire_gen.go)
│   └── features/                   # Vertical slices: settings, shortcut, clipboard, tray, enhance, welcome
├── frontend/
│   ├── src/app/
│   │   ├── core/                   # WailsService (bindings bridge), MessageBus, guards
│   │   ├── features/               # fix, text-enhancement, settings, welcome-wizard, dev-tools
│   │   └── layout/                 # Sidebar shell
│   └── bindings/                   # Auto-generated by wails3 generate bindings
├── website/                        # Landing page (GitHub Pages → keylint.io)
└── .github/workflows/
    ├── build-linux.yml             # PR/push → Linux binary artifact
    └── build-windows.yml           # Tag push → Windows .exe + draft release

CI/CD

Linux build — runs on every PR and push to main, uploads binary artifact
Windows build — runs on v* tag push, cross-compiles .exe, creates a draft GitHub release

0xMMA/KeyLint