Developer builds an LLM from scratch in TypeScript to demystify transformers

A developer is creating a ChatGPT-style model using TypeScript to gain a fundamental, non-magical understanding of transformer architectures. The project is being built from first principles, with completed chapters covering dataloaders, embeddings, and the attention mechanism. The author chose TypeScript over Python, stating that reimplementing concepts in a different language deepens comprehension of implementation nuances. The work was shared on Hacker News to solicit feedback from the community.