DFlash2

This release introduces DFlash2 support with local convolution and candidate selection, alongside various bug fixes and code refactoring. Key changes include optimizations for DFlash2 and fixes for mrope and graph number calculations.

This release introduces significant performance optimizations for Kimi-K3 and DeepSeek V4, alongside advancements in speculative decoding and Model Runner V2 maturation. It also features a new Rust frontend and gRPC capabilities, tiered KV cache offloading, and expanded model support.