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Developers building or fine-tuning transformer-based models can use this walkthrough to understand why RoPE is the dominant positional encoding in modern LLMs and how its rotation-based mechanics differ from earlier approaches — essential context for evaluating variants like pruned RoPE.
Practitioners building or fine-tuning transformer-based models can use this walkthrough to understand the positional encoding foundations underlying modern LLMs — and to prepare for understanding architectural variants like Gemma 4's pruned RoPE.