38 runnable notebooks for learning Hugging Face from Trainer to GRPO by removing the abstractions

A developer has published a learning repository containing 38 runnable notebooks that teach the Hugging Face stack by progressively removing abstractions, from high-level APIs through fine-tuning, PEFT, reasoning/RL, and end-to-end project work. The repository's author is seeking technical feedback on the GRPO-from-scratch and Romanian QA evaluation sections and on gaps in the learning path.

I’ve been building a learning repository around a simple idea: don’t just learn how to call Hugging Face APIs — progressively remove the abstractions until you understand what they are doing. The repo now contains 38 runnable notebooks covering a path from the core Hugging Face stack into fine-tuning, PEFT, reasoning/RL, and end-to-end project work. Some of the parts I think are most useful: The progression is roughly: high-level API → inspect the abstraction → rebuild the important parts → use the higher-level tooling again with a better mental model Repository: I’d especially appreciate feedback from people working with Hugging Face, LLM fine-tuning, tokenization, or RL. I’m particularly interested in whether the GRPO-from-scratch and Romanian QA evaluation sections explain the underlying ideas clearly enough, and whether there are important gaps in the learning path that would be worth adding. If the repository is useful to you, a GitHub star is appreciated too, but technical feedback is even more useful.