FractalMind

AI system with evolutionary memory and autonomous learning. Combines graph precision with vector embedding flexibility to create a knowledge engine that mimics human cognition.

Features

• ✅ Free Models: Use Ollama Cloud's nemotron-3-nano (30B) and nomic-embed-text for free
• ✅ Local Embeddings: FastEmbed generates embeddings locally at ingestion time
• ✅ Sovereign Data: All data stored in your own SurrealDB database
• ✅ Auto-Learning: REM phase consolidates memory and learns from web search
• ✅ Fractal Graph: RAPTOR algorithm creates self-similar knowledge hierarchy

Architecture

Operating Phases

• Vigilia (Wakefulness): Fast responses using fractal graph navigation with SSSP
• REM Phase (Sleep): Asynchronous learning, memory consolidation, and web search

Core Components

• Storage Engine: SurrealDB with SSD persistence and HNSW indices for vectors
• Fractal Graph: RAPTOR recursive structure with semantic clustering
• Multi-User: Strict separation with NAMESPACE (global/personal) and SCOPE per user
• Optimized Navigation: O(m log^(2/3) n) using hopsets for shortest paths

Project Structure

fractalmind/
├── src/
│ ├── models/ # Data models (nodes, edges, embeddings)
│ ├── db/ # SurrealDB configuration and queries
│ ├── api/ # HTTP endpoints (Axum)
│ ├── services/ # Business logic (ingestion, REM, queries)
│ ├── graph/ # Graph algorithms (SSSP, RAPTOR)
│ ├── embeddings/ # Embedding generation (fastembed)
│ ├── cache/ # LRU cache for frequent nodes
│ └── utils/ # General utilities
├── docs/ # Technical documentation
│ ├── FRACTAL_MIND_CORE_SPEC.md
│ ├── GUIA_USO_MODELOS_FRACTALES.md
│ ├── MODELOS_FRACTALES_IMPLEMENTACION.md
│ └── OpenClaw_INTEGRATION.md
├── searxng/
│ └── searxng-config.yml # SearXNG configuration (local web search)
├── docker-compose.yml # Service orchestration (includes SearXNG)
└── Dockerfile # Rust backend image

Quick Start

Prerequisites

• Rust 1.75+
• Docker & Docker Compose
• Minimum 4GB RAM (8GB recommended)

Free LLM Models: FractalMind uses Ollama Cloud's free tier models:

• nemotron-3-nano for chat and summarization (30B parameters)
• nomic-embed-text:v1.5 for embeddings (768D)
• Total cost: $0/month on the free plan

Demo

FractalMind API running on port 9000 with SurrealDB and SearXNG

Installation

1. Clone and run:

git clone <repo-url>cd fractalmind
./dev.sh run

Docker Services:

• SurrealDB (port 8000): Database with persistent file storage in ./data/surrealdb/fractalmind.db
• SearXNG (port 18080): Local web search for REM phase (8080 inside Docker network)
• FractalMind API (port 12000): Main API server (9000 inside Docker network)

Free LLM Models (Ollama Cloud):

• nemotron-3-nano - 30B parameters, excellent for chat/summarization
• nomic-embed-text:v1.5 - 274MB, high-quality embeddings
• Cost: $0/month (free tier)

Data Persistence:

• All database data is stored in ./data/surrealdb/fractalmind.db on your host machine
• Survives container restarts and updates
• Backup: copy the data/surrealdb/ directory

SearXNG Integration:

• automatically included in docker-compose (profile: searxng)
• provides web search for REM phase
• runs on http://localhost:18080 (host) and http://searxng:8080 (inside Docker)
• if unavailable, REM phase web search disabled (still works with local knowledge)

2. Build and run:

cargo build --release
cargo run

Or with full Docker Compose:

docker-compose --profile full up -d

Development

# Fast build (development)
cargo build
# Tests
cargo test# Integration tests (requires running SurrealDB)
cargo test -- --ignored
# Linting
cargo clippy -- -D warnings
# Formatting
cargo fmt

API Endpoints

Endpoint	Method	Description
/v1/ingest	POST	Ingest files (PDF, images, text)
/v1/remember	POST	Episodic/conversational memory
/v1/ask	POST	Query with fractal navigation
/v1/sync_rem	POST	Trigger REM phase (consolidation + web)
/v1/memory	PATCH	Manual knowledge update

Data Model

FractalNode

Fundamental graph node with:

• Type: Leaf, Parent, Root
• Status: Complete, Incomplete, Pending, Deprecated
• Embedding: Semantic vector (768D Nomic, 384D BGE, 512D CLIP)
• Namespace: global_knowledge or user_
• Metadata: Source, tags, language, access count

FractalEdge

Edge with weight calculated as 1/similarity:

• Types: ParentChild, Semantic, Temporal, CrossNamespace
• Weight: For shortest path (lower = more relevant)
• Similarity: Cosine between embeddings (0.0-1.0)

Learning Cycle (REM Phase)

1. Detect nodes with status: incomplete
2. Web search to gather multiple perspectives
3. Synthesize information into new nodes (global namespace)
4. Semantic clustering of leaves → generate parent summaries
5. Create links between personal ↔ global memory

Configuration

Key variables in .env:

# Database
SURREAL_URL=http://localhost:8000
SURREAL_NS=fractalmind
SURREAL_DB=knowledge
# Embeddings (local - no external service needed)# FastEmbed generates embeddings locally when you ingest content# Embeddings are stored in SurrealDB with HNSW index# Once ingested, no embedding model running required!
EMBEDDING_MODEL=nomic-embed-text-v1.5
EMBEDDING_DIMENSION=768
# LRU Cache
CACHE_SIZE=1000
# REM Phase
REM_INTERVAL_MINUTES=60
WEB_SEARCH_PROVIDER=searxng
WEB_SEARCH_BASE_URL=http://localhost:8080
WEB_SEARCH_ENABLED=true
# LLM Providers (Ollama Cloud - Economic/Free Models)# Use these free models for cost-effective operation:
LLM_PREFER_LOCAL=false # Prioritize Ollama Cloud for more capacity# Embedding Model (Free Tier)
EMBEDDING_PROVIDER=ollama-cloud
EMBEDDING_MODEL=nomic-embed-text:v1.5
# Chat Model (Economic - 8B parameters)
CHAT_PROVIDER=ollama-cloud
CHAT_MODEL=nemotron-3-nano
# Summarizer Model (Economic - 8B parameters)
SUMMARIZER_PROVIDER=ollama-cloud
SUMMARIZER_MODEL=nemotron-3-nano
# Ollama Cloud API Key
OLLAMA_API_KEY=your_ollama_cloud_api_key_here
OLLAMA_CLOUD_BASE_URL=https://api.ollama.com

🎯 Economic/Free Models (Ollama Cloud)

Free Tier Features:

• Unlimited public models on the free plan
• No credit card required for basic usage
• Pay only for heavy usage (Pro: $20/mo, Max: $100/mo)
• Data privacy: No storage of prompts or responses

Recommended Free Models:

Model	Size	Best For	Cost
nomic-embed-text:v1.5	274MB	Embeddings	Free
nemotron-3-nano	30B	Chat/Summarizer	Free
llama3:8b	4.7GB	General chat	Free

Switching to Local Models:

If you prefer local inference (sovereignty), set:

LLM_PREFER_LOCAL=true
OLLAMA_BASE_URL=http://localhost:11434
OLLAMA_API_KEY= # Empty for local

Embeddings - How It Works

FractalMind uses local embeddings via FastEmbed - no external API needed!

1. Ingestion Phase: When you add content via /v1/ingest, FastEmbed automatically generates embeddings locally
2. Storage: Embeddings + content stored in SurrealDB with HNSW vector index
3. Query Time: Embeddings loaded from DB - no embedding model needed at runtime!
4. REM Phase: Uses web search (SearXNG) to gather knowledge - no embeddings needed

Benefits:

Feature	Description
✅ No External API	FastEmbed generates embeddings locally
✅ No Cost	No OpenAI/Anthropic costs for embeddings
✅ No Model Running	Embeddings pre-computed at ingestion
✅ Fast	FastEmbed is optimized for speed
✅ Multiple Models	Nomic (768D), BGE (384D), CLIP (512D)

Example Usage:

# Ingest content - FastEmbed handles embeddings automatically
curl -X POST http://localhost:12000/v1/ingest \
-H "Content-Type: application/json" \
-d '{"content": "Your text here", "namespace": "global"}'# Query - embeddings retrieved from DB (no model needed)
curl -X POST http://localhost:12000/v1/ask \
-d '{"query": "What is this about?", "namespace": "global"}'

Roadmap

• Fractal data model
• SurrealDB configuration with HNSW
• Rust project structure
• LLM module (Brain) with Ollama/OpenAI providers
• Embeddings service (fastembed)
• Optimized LRU cache
• REST API (Axum)
• RAPTOR algorithm for clustering
• SSSP navigation with hopsets
• Asynchronous REM phase
• PDF/image ingestion with OCR
• Web UI (React/Tauri)

License

MIT

Última actualización: 2026-04-10