Open technical library
Advanced AI engineering books
Free, crawlable, chapter-based books on agents, retrieval, RAG, ontologies, knowledge graphs, and production AI systems. Every chapter includes implementation detail, examples, exercises, and primary references.
Agent Systems
Agentic AI Systems
From goal-directed model calls to governed, evaluated software systems.
Agent Systems
Loop Engineering
Bounded state machines, safe effects, recovery, and replay for long-running AI work.
Agent Systems
Harness Engineering & Sandboxes
Reproducible environments, structured tools, isolation, traces, and evaluation hooks.
Retrieval Systems
Retrieval Engineering
Lexical, dense, approximate, hybrid, and reranked search with measurable evidence quality.
Retrieval Systems
Retrieval-Augmented Generation
Build grounded answer systems that preserve evidence from ingestion through citation.
Graph Systems
Ontology & Knowledge Graph Engineering
Model identity, meaning, provenance, validation, querying, and graph governance.
Retrieval Systems
Production RAG & GraphRAG
Multi-stage retrieval, graph construction, local and global search, evaluation, and operations.
Graph Systems
Knowledge-Driven Agent Architectures
Use ontologies and graph evidence to constrain plans without confusing knowledge with authority.