Overview
A “second brain” that sits between Notion and Obsidian: a rich editor, structured properties and database views, on top of plain Markdown files with YAML frontmatter, so the data always belongs to the user.
Requirements (SRS) and architecture docs were written and approved before building, and most of it was built through autonomous AI-agent runs. My agents use it too: my projects' specs and task trackers live there, read and written through its MCP server.
What I built
- 01WYSIWYG Markdown editor, nested tags with AI tag suggestions, and Notion-style local databases (table, board, gallery and calendar views).
- 02Keyword and semantic search across everything.
- 03Quick capture from an iOS widget, the share sheet and a browser extension.
- 04Offline iOS app with conflict-safe sync, and a resumable Notion import.
- 05Per-user and global monthly AI spending caps.
- 06An MCP server, so AI assistants can read and write notes. Interface in English and Portuguese.
Stack
- React
- Vite
- Hono
- Drizzle
- Neon Postgres
- Cloudflare R2
- Capacitor
- Electron
- OpenAI
- Anthropic
- Passkeys
- MCP