Cortex AI is a privacy-first multi-source knowledge ingestion, hybrid search, and 3D RAG AI Assistant platform that transforms documentation, notes, codebases, and videos into a fully queryable private second brain.
Save what you read, ask what you know — Cortex retrieves answers strictly from your ingested resources with grounded inline citations ([Source 1], [Source 2]) and zero hallucinations.
Key System Architecture & Core Capabilities:
Multi-Source Knowledge Ingestion Pipeline:
→ Web Pages: HTML sanitization into clean markdown & structured text chunks.
→ PDF Documents: Direct multi-layout text parsing and semantic chunking.
→ YouTube Videos: Automated transcript extraction with Gemini fallback translation for non-English content.
→ GitHub Repositories: Full code repo cloning, syntax parsing, and repository structure indexing.
→ Plain Notes: Live markdown editor with instant auto-save and background re-ingestion.
Hybrid Search & RRF Fusion:
→ Combines semantic vector similarity search (pgvector) with lexical keyword search (BM25).
→ Fuses search rankings using Reciprocal Rank Fusion (RRF) for optimal retrieval accuracy across unstructured data.
Interactive 3D Knowledge Graph:
→ Visualizes entity relationships, cosine similarity edges, and shared tags in an interactive Three.js 3D canvas.
→ Real-time node detail popups, similarity threshold filters, camera controls, and node metadata editing.
Grounded RAG AI Assistant (Ask Cortex):
→ Technical QA assistant strictly constrained to ingested context.
→ Interactive inline citations with collapsible source snippets and direct origin links.
Bring Your Own Key (BYOK) & Privacy Security:
→ Multi-provider support: OpenAI, Google Gemini, and Ollama (100% offline local LLMs).
→ Symmetric Fernet Encryption (AES-128) for user API key security in PostgreSQL.
→ Free Demo Tier available out-of-the-box.