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spark-training-gotchas

Preflight and diagnose the ten known failure modes for ML training on NVIDIA DGX Spark. Use when a training run on DGX Spark fails to start, OOMs below the 128GB limit, slows down mid-run, or before any multi-hour training job on GB10.

plugins/dgx-spark-ops/skills/spark-training-gotchas/SKILL.md

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# Spark Training Gotchas

DGX Spark's GB10 chip (Grace Blackwell, SM121, 128GB unified
memory, aarch64) has ten recurring failure modes across
launch, memory, thermals, bandwidth, and precision. Each is
named G1–G10 so it can be checked by number — the numbering
is load-bearing for tooling that runs these checks. Read this
before a long run, not after hour six.

## When to Use This Skill

- A training run fails to start, with an import error or a
  segfault that doesn't point at the real cause.
- A run OOMs while `nvidia-smi` still shows headroom.