I've been building Onyx, a local-first AI productivity suite for note-taking and knowledge management.
Architecture:
Local-first: your notes are markdown files on your machine, not in someone else's database
End-to-end encrypted sync via Nostr protocol
AI writing assistance with configurable providers (OpenAI, Anthropic, local models—bring your own keys)
No accounts, no vendor lock-in, works fully offline
Productivity features:
Daily notes, templates, YAML frontmatter editor
AI skills you can customize for your workflow
Built-in OpenCode integration for agentic AI assistance
Keyboard-driven (Ctrl+D for daily notes, Ctrl+T for templates, etc.)
Cross-platform: Linux, macOS, Windows
The idea is an AI-augmented second brain that doesn't require trusting a company with your data. Nostr handles sync without central servers, encryption means even relays can't read your content. OpenCode integration brings agentic coding and writing capabilities directly into your notes.
GitHub: https://github.com/derekross/onyx
Curious what others think about the local-first + AI combination. Most AI note apps are cloud-first by design—is local-first AI productivity something people actually want? I know I did! I've been using it every day for the last month.
