cosmos3-setup

A setup guide for installing Cosmos3, preparing its environment, downloading model checkpoints, and checking that it works.

In plain words
What is it for?
It helps users install Cosmos3, configure it, download checkpoints, use Docker, and verify the installation.
Why use it?
It brings together the first-run steps that can otherwise be scattered across installation and model-download instructions.

Skill for Claude CodeCodex

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.

agentmods
npx agentmods add skills/nvidia/cosmos-framework/cosmos3-setup
Any agent
npx skills add NVIDIA/cosmos-framework --skill cosmos3-setup
Clone the repo
git clone --depth 1 https://github.com/NVIDIA/cosmos-framework

Made for: Claude Code, Codex.

Per session 71 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 933 The whole file, excluding the scripts and references it only reads on demand.
Security scan D 3 findings. Scan, not verified.
Origin unknown 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 $0.00071 $0.00933
Opus 5 $0.00036 $0.00466
Sonnet 5 $0.00014 $0.00187
Haiku 4.5 $0.00007 $0.00093

Measured 3d ago against content hash 57c158aab70f, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade D, and why

cosmos3-setup scanned grade D with 3 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 3d ago.

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.

Asks for rootmediumPrivilege escalation

A mod that escalates privileges can change anything on the machine, not only the project.

2. **System deps**: `sudo apt-get install -y --no-install-recommends curl ffmpeg git-lfs libx11-dev tree wget`

Downloads and executes remote codehighSupply chain

curl | sh runs whatever the server returns today, which is not necessarily what it returned when this was reviewed.

3. **Install uv**: `curl -LsSf https://astral.sh/uv/install.sh | sh && source $HOME/.local/bin/env`

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

2. **System deps**: `sudo apt-get install -y --no-install-recommends curl ffmpeg git-lfs libx11-dev tree wget`
.agents/skills/cosmos3-setup/SKILL.md · 62 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

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. 3d ago First seen · 62 lines · 71 tokens per session scan D 57c158aab70f

Subscribe to this mod's changes

cosmos3-setup is a skill published in the GitHub repository NVIDIA/cosmos-framework (498 stars, last pushed 4d ago), with no licence file. It adds 71 tokens to every session and 933 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it D with 3 findings (asks for root, downloads and executes remote code, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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