Tej-Sharma/horizon-overlay — reverse-engineered prompt

Build me a private, local first Mac desktop app called Constella. I want it to feel like a personal command center for my files, notes, memories, and AI workflows. Let me add folders like Documents, Downloads, Obsidian vaults, and other project folders, then have the app index things like markdown, text, PDFs, DOCX files, and images on my machine so I can search everything in one place.

I want a polished JARVIS style interface with a global search, recent notes, connected concept pages, higher level themes, related links, source citations, and helpful alerts or recommendations that come from analyzing my files over time. Add a simple command surface for AI agents and reusable workflows, and expose the local knowledge base through MCP so tools like Claude Code can search, read, and write to it directly.

Keep it as a real working prototype, not just mock screens. Use local processing where possible, with optional cloud model support. If anything is unclear, look up the current docs and make sensible choices.