Show HN: Stik – Instant thought capture for macOS (open source, Tauri and Rust) (opens in new tab)

Hi, I built Stik because every note app wanted to be my second brain. I just needed something to catch a thought before it disappeared.

How it works: Press [Cmd+Shift+S] from anywhere. A floating post-it appears. Type. Close. Back to work in under 3 seconds. Notes are saved as plain .md files in ~/Documents/Stik/.

What makes it different: - No account, no cloud, no sync setup, no onboarding - Notes are plain markdown files, open them in any editor - On-device AI (Apple NaturalLanguage framework) for semantic search and folder suggestions, nothing leaves your Mac - Built with Tauri 2.0 (Rust backend + React frontend), ~8MB binary - DarwinKit sidecar handles NLP via a JSON-RPC bridge to Apple's ML frameworks

Tech stack: Rust, React 19, TypeScript, Tailwind, Tiptap editor, Swift (DarwinKit sidecar)

Install: brew install --cask 0xMassi/stik/stik

Source: https://github.com/0xMassi/stik_app

I'd love feedback on the architecture, especially the Tauri + Swift sidecar pattern for accessing Apple-only frameworks from a cross-platform runtime.