Reproducing & Building a Practice

Papers describe what should happen; code shows what actually happens — the undocumented hyperparameters, the preprocessing step that 'doesn't matter' (it does), the evaluation quirk that explains a third of the reported gain.

The reproduction ladder, easiest to hardest:

• Run the released code or checkpoint on your inputs
• Re-implement only the core idea — skip the engineering scaffolding
• Re-derive the math with pencil and paper
• Full retraining — rare, expensive, and the gold standard of understanding