Author or refresh a VeOmni model's patchgen-generated modeling under generated/ — GPU and/or NPU config, dense or MoE, text / VLM / Omni. Covers the patchgen decorators, sharing patches across sibling models via name_map, MoE fused-expert weight loading, Ulysses SP in multimodal forwards, __init__.py registration, running codegen, and the test cases. This is the modeling step of adding a new model, not only of refreshing an existing one. Trigger: 'add patchgen for a model', 'write a patch_gen_config', 'regenerate the generated modeling', 'add NPU patchgen', 'port a model to patchgen', 'transformers v5 migration'. Never hand-edit anything under generated/.