# Welcome to the Fine-Tuning Cookbook: System, Stage Taxonomy, and the Reproducibility Contract

> Source: https://sukruyusufkaya.com/en/learn/fine-tuning-cookbook/ftc-cookbook-sistematigi-ve-reproducibility-kontrati
> Updated: 2026-05-14T14:42:48.835Z
> Category: Fine-Tuning Cookbook (Model-by-Model)
> Module: Part 0 — Engineering Foundations
**TLDR:** User manual for this cookbook: 5-component lesson anatomy (Theory/Math/Lab/Debug/Bench), Stage taxonomy (Spike → Reference → Production → Research), reproducibility contract (bit-exact runs), why the RTX 4090 baseline, GPU budgeting math.