I've been building something I've wanted for years: a truly local-first "Second Brain" that combines the best of Obsidian, AI chat, and knowledge graphs — all running on your own machine.
I've tried everything: Obsidian, Notion, Roam, Logseq, Tana, Capacities, Mem.ai, Reflect...
The pattern: Either it's cloud-dependent (privacy risk, subscription, offline broken), or it's local but limited (no AI, no knowledge graph, poor mobile).
I wanted both: full local control + AI that actually understands my notes + knowledge graphs that actually help me think. something like "obsidian + AI with RAG" with some other features.
I'm seeing second brain AI frameworks on demand in instagram. People are creating second brains by connecting claude code with obsidian... so i thought what if i bring the whole thing into a software.... And that is the core idea of my project..
✅ What Works Today
Feature Status
Local Vault System ✅ Markdown files in folders you control (Obsidian-compatible)
*AI Chat with RAG *✅ Hybrid search (FTS5 + vector embeddings) + your notes as context
*Knowledge Graph *✅ Auto-extracted entities/relationships, interactive graph
*YouTube Ingestion *✅ Paste URL → transcript → structured markdown notes
Daily Reflections ✅ Auto-generated daily summaries from your activity
*Proactive Suggestions *✅ AI surfaces relevant past notes while you write
*Hybrid Search *✅ keyword + vector database
Local-First ✅ You can use local LLMs, or you can set an API key...
"I wanted a thinking partner, not a filing cabinet."
Most note apps are passive storage. Second Brain is an active thinking partner:
You write → it embeds + indexes
You chat → it retrieves relevant context (hybrid search)
It responds → with citations to your notes
It suggests → "Hey, you wrote about this 3 months ago — relevant?"
It visualizes → Knowledge graph shows connections between ideas and informations that you missed
I need honest feedback before investing more months.
Would you use this? What's missing for your workflow?
Local-first vs Cloud sync — how important is cloud sync vs. pure local?
AI Integration — OpenRouter (cloud) vs Ollama (local)? Both?
Pricing model — Free/OSS core, paid cloud sync? One-time license? Donations?
Plugin system — What extensions would you build?
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