DeepSeek Harness Model Extension Plugin (dsh-model-extension)

The `dsh-model-extension` plugin enhances DeepSeek Harness (DSH) with more complete model configuration capabilities by taking over the model settings page. Core features include a new “Model+” navigation item, expanded inference parameters and multimodal settings in the model catalog, automatic prefilling support, and DeepSeek account routing. Configuration data is persisted using DSH-native methods. Installation supports both Web/CLI and Desktop, which must be installed separately and only support specific data formats.