nemotron-customizer-airgap

nemotron-customizer-airgap is a skill for Claude Code, Codex from NVIDIA-NeMo/Nemotron. It costs 89 tokens per session (1,126 once invoked), scanned A, original, Apache-2.0.

A workflow for preparing and running Nemotron Customizer in an air-gapped environment, meaning a computer cluster without internet access. It creates bundles on a connected machine and uses them on the offline side.

In plain words
What is it for?
Use it to prepare or validate air-gap bundles, select Nemotron Customizer steps, group execution images, add repository or Python-package files, and resume offline runs.
Why use it?
It helps move the required container images, configurations, and repository files into an offline cluster in a checked and repeatable way.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to prepare or validate air-gap bundles, select Nemotron Customizer steps…

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Install with agentmods
npx agentmods add skills/nvidia-nemo/nemotron/airgap
About the project

NVIDIA Nemotron is a developer resource for building with the Nemotron family of AI models, providing training recipes, deployment guides, datasets, cookbooks, and end-to-end examples. It is intended for developers and researchers training, customizing, deploying, or applying Nemotron models to agentic AI use cases. Its catalogue add-ons include a Claude Code plugin that guides users through Nemotron customization steps.

NVIDIA-NeMo/Nemotron · 2,023 stars · on GitHub · docs.nvidia.com

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add NVIDIA-NeMo/Nemotron --skill airgap
Clone the repo
git clone --depth 1 https://github.com/NVIDIA-NeMo/Nemotron

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for nemotron-customizer-airgap

README.md
[![agentmods](https://agentmods.dev/badge/skills/nvidia-nemo/nemotron/airgap.svg)](https://agentmods.dev/skills/nvidia-nemo/nemotron/airgap)
Your own site
<a href="https://agentmods.dev/skills/nvidia-nemo/nemotron/airgap"><img src="https://agentmods.dev/badge/skills/nvidia-nemo/nemotron/airgap.svg" alt="Measured on agentmods" height="20"></a>
Per session 89 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,126 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00089 $0.01126
Opus 5 $0.00044 $0.00563
Sonnet 5 $0.00018 $0.00225
Haiku 4.5 $0.00009 $0.00113

Measured 7d ago against content hash d359ab5e9490, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

nemotron-customizer-airgap scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 7d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (runner.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

deploy/nemotron-customizer/airgap/SKILL.md · 116 lines

How it starts

The opening of the file, as written. The whole thing — 116 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Nemotron Customizer Airgap

Use this skill to help an agent produce a connected-machine airgap bundle and then submit Nemotron Customizer steps from the airgapped side. Keep it grounded in the checked-in runner and manifests; do not invent a parallel packaging flow.

Read First

  • deploy/nemotron-customizer/airgap/README.md for the operator flow.
  • deploy/nemotron-customizer/airgap/airgap.yaml for the current image map.
  • deploy/nemotron-customizer/airgap/runner.py when changing behavior.
  • tests/deploy/test_airgap_runner.py before editing runner logic.
  • deploy/nemotron-customizer/airgap/configs/ for runtime overlay configs.

For selected steps, inspect the catalog through the CLI:

uv run nemotron steps show <step_id> --json

Workflow

  1. Establish the side of the workflow:

    • Connected machine: validate, build, save image tarballs.
    • Airgapped side: load images, set env profiles, run selected steps.
  2. Gather the minimum inputs:

    • Target steps and config names, for example sft/megatron_bridge:tiny.
    • Target architecture or Docker platform, for example linux/amd64.
    • Available base images and whether the connected machine can pull them.
    • Airgapped env profile name, mounts, model/data/checkpoint locations.
    • Whether destructive or expensive actions such as --execute, Docker build, Docker volume cleanup, or state-file removal are explicitly allowed.
  3. Plan with the runner first:

uv run python deploy/nemotron-customizer/airgap/runner.py \
  --config deploy/nemotron-customizer/airgap/airgap.yaml

Use --target <step_id>:<config> for one-off selections without editing YAML. The runner expands dependencies from dependencies, validates selected step files/configs, groups execution images, and prints selected execution images.

  1. Edit airgap.yaml only where the runner expects configuration:
    • workflow.stages or CLI --target for selected customer steps.
    • dependencies for explicit upstream Nemotron Customizer step outputs.
    • step_execution_images for step-to-image mapping.
    • execution_images for base image, tag, tar, platform, and import probes.
    • launcher_image for the launcher container.

Read the full file on GitHub · 116 lines

Files

What ships with it

10 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 7d ago First seen · 116 lines · 89 tokens per session scan A d359ab5e9490

Subscribe to this mod's changes

nemotron-customizer-airgap is a skill published in the GitHub repository NVIDIA-NeMo/Nemotron (2,023 stars, last pushed 4d ago), licensed Apache-2.0. It adds 89 tokens to every session and 1,126 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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