Five Gemma-4 models, one accelerator: what porting E2B 31B to AWS Inferentia2 taught me

I ported the whole Gemma-4 family — E2B, E4B, 12B, 31B, and the 26B-A4B MoE — to run on AWS Inferentia2. Each has its own write-up in this series; this is the map. What's shared, what's different, how...