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Hermes-agentic Glimmer NVFP4 on DGX Spark

Tested SGLang and vLLM launch recipes for an NVFP4 export of a Hermes-agentic fine-tune of Muse-Glimmer-30B on NVIDIA DGX Spark (GB10).

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# Muse Glimmer 30B Hermes Agentic — NVFP4 Spark serve recipes

Verified **SGLang** and **vLLM** launch recipes for the NVFP4 export of
[`vcruz305/Muse-Glimmer-30B-Hermes-Agentic-NVFP4`](https://huggingface.co/vcruz305/Muse-Glimmer-30B-Hermes-Agentic-NVFP4)
on **NVIDIA DGX Spark (GB10 / SM 12.1)**.

| Hub artifact | Role |
|---|---|
| [`vcruz305/Muse-Glimmer-30B-Hermes-Agentic`](https://huggingface.co/vcruz305/Muse-Glimmer-30B-Hermes-Agentic) | BF16 / FP16 merge (~56 GB) |
| [`vcruz305/Muse-Glimmer-30B-Hermes-Agentic-NVFP4`](https://huggingface.co/vcruz305/Muse-Glimmer-30B-Hermes-Agentic-NVFP4) | NVFP4 compressed-tensors (~22 GB) — **this recipe** |
| [`vcruz305/Muse-Glimmer-30B-Hermes-Agentic-GGUF`](https://huggingface.co/vcruz305/Muse-Glimmer-30B-Hermes-Agentic-GGUF) | llama.cpp GGUF ladder |

Base model: [`meta-models/Muse-Glimmer-30B`](https://huggingface.co/meta-models/Muse-Glimmer-30B) (Apache-2.0).  
SFT data: [`vcruz305/hermes-agentic-tool-sft`](https://huggingface.co/datasets/vcruz305/hermes-agentic-tool-sft).

## Hardware / software assumptions

- DGX Spark GB10 (Blackwell, **compute capability 12.1**), ~128 GB unified memory
- aarch64 Linux
- CUDA 13.x host stack with working `/dev/nvidia*` nodes
- Podman or Docker for the SGLang path
- OpenAI-compatible clients against `http://127.0.0.1:8201/v1`

## Preferred path: SGLang (measured)

**Image:** `docker.io/lmsysorg/sglang:latest-cu130`  
(image env on the measured host: `SGLANG_IMAGE_TAG=lmsysorg/sglang:v0.5.18`, FlashInfer 0.6.17)

**Why these flags (SM 12.1):**

| Flag | Why |
|---|---|
| `--fp4-gemm-backend flashinfer_cutlass` | Auto can pick Marlin “on SM120” and die: `mm_fp4` does not support Marlin on **cap 121**. Force CUTLASS. |
| `--cuda-graph-backend-decode full` | Avoids breakable-graph crash: `Unsupported BCG output type LogitsProcessorOutput`. |
| `--cuda-graph-backend-prefill disabled` | Prefill graphs not used on this path. |
| `--kv-cache-dtype fp8_e4m3` | Memory headroom on Spark. |
| `--language-model-only` | Text/tools student; vision frozen in the SFT merge. |
| `--reasoning-parser muse` + `--tool-call-parser muse` | Muse chat / tool protocol. |

### Launch

```bash
# download once
hf download vcruz305/Muse-Glimmer-30B-Hermes-Agentic-NVFP4 \
  --local-dir $HOME/models/Muse-Glimmer-30B-Hermes-Agentic-NVFP4

export MODEL=$HOME/models/Muse-Glimmer-30B-Hermes-Agentic-NVFP4
bash scri

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