spark/AGENTS.md

Spark -- DGX Finetuning

Docs, scripts, and recipes for finetuning on the DGX Spark.

Target Host: sin (sinanju)

Field	Value
Hostname	sin / sinanju
User	madcat
LAN	192.168.88.108
WireGuard (mesh)	10.44.0.2
SSH	ssh sin or ssh madcat (LAN), mesh-sin (WG)

Hardware

Component	Spec
Model	NVIDIA DGX Spark Founders Edition
Baseboard	P4242, rev A.7
GPU	GB10 (sm_121)
Memory	~128 GiB unified (CPU+GPU shared)
NIC	Realtek RTL8127 10GbE
WiFi	MediaTek 7925
Architecture	aarch64

Software

Component	Version
DGX OS	7.5.0
Kernel	6.17.0-1018-nvidia
Driver	580.159.03
BIOS	5.36_0ACUM018

Services

• Ollama -- localhost:11434 (local model serving)
• opencode-serve -- 0.0.0.0:4096 (systemd user service)
• DGX Dashboard -- localhost:8787

Key Paths

/etc/dgx-release                          # version manifest
/opt/nvidia/nvfwupd/bin/nvfwupd            # firmware update tool
/opt/nvidia/bin/spark-ota-check            # OTA check CLI
/home/madcat/.config/opencode/opencode.jsonc  # opencode config

Repo Structure

spark/
  AGENTS.md        # this file

Notes

• nvidia-smi showing N/A is normal for Spark -- it's not a discrete GPU
• GB10 uses unified memory; no separate VRAM
• BIOS _0ACUM023 exists but is not in OTA pipeline (request via NVIDIA support)
• Known BIOS issue: early firmware can hang during long-context (~200k tok) vLLM prefill