# Second Brain

An embeddable, offline-first memory system for AI agents with correctness tracking, neural scoring, and semantic retrieval.

## What's New (Phase 2-5)

- **Sentence-Transformer Embeddings** (`src/embedder.py`) — Cached, offline, 384-Dim
- **ChromaDB Vector Store** (`src/chroma_store.py`) — Semantic similarity search
- **Neural Confidence Scorer** (`src/neural_scorer.py`) — PyTorch RL net, trains on confirm/reject feedback
- **Hybrid Retrieval** (`src/retriever.py`) — Keyword + Semantic + Neural fusion
- **Streamlit Dashboard** (`src/app_dashboard.py`) — Search, confirm/reject, neural training UI
- **Graph Visualization** (`src/graph_view.py`) — Interactive Cytoscape.js graph with confidence colors

## Architecture