Expand description
Read any supported checkpoint (including an existing GGUF) and rewrite it at a
different dtype, carrying metadata through. Shared by the generic zsfm convert
command and by every per-model CLI’s cached-GGUF fast path: once a repo has been
downloaded and converted to a canonical F32 GGUF once, later requests for a
different dtype recast from that cache instead of re-downloading from HuggingFace.