How semantic search actually works, with code.
Explains embeddings, cosine similarity, chunking strategy and hybrid search, then shows a working retrieval pipeline. The chunking chapter is the difference between a demo and a useful RAG system.
Hundreds of role prompts that actually change output quality.
Prompt library · CC0 / public domain
From zero-shot to chain-of-thought, with worked examples.
Online guide · MIT / open source
Open models for text, vision, audio and embeddings.
Model repository · Varies — per model
Style, lighting and camera keywords that control output.
Illustrated PDF · Creative Commons
Fine-tuning, quantisation and deployment, free.
Notebooks + roadmap · Apache 2.0
Accurate multilingual transcription you can self-host.
Model + code · MIT / open source
Message structures that get replies, not spam reports.
Guide + templates · Creative Commons
Thousands of hours of coding lessons and certifications.
Interactive course · BSD / open
The best introduction to computer science, free to audit.
Video course · Creative Commons
