atmos-version

atmos-version is a skill for Claude Code, Codex from cloudposse/atmos. It costs 39 tokens per session (1,097 once invoked), scanned A, original, Apache-2.0.

A version-tracking system for external dependencies declared in Atmos configuration. It records the selected versions in a lock file and can apply or check those versions in project files.

In plain words
What is it for?
Use it to pin dependency versions, manage update tracks, maintain lock files, update version references, and verify version drift in CI.
Why use it?
It keeps dependency updates predictable and reviewable, while detecting when files or lock data no longer match the chosen versions.

Skill for Claude CodeCodex

Part of the atmos plugin — 51 skills shipped together

About the project

Atmos is an infrastructure runtime that coordinates tools such as Terraform, OpenTofu, Kubernetes, Helm, Packer, Ansible, and containers through consistent commands and configuration. It is for teams running cloud infrastructure on laptops, in CI, or through AI agents across environments and regions. Its catalogue entries provide skills, agents, commands, and other add-ons for Atmos workflows.

cloudposse/atmos · 1,372 stars · on GitHub

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/cloudposse/atmos/atmos-version
Any agent
npx skills add cloudposse/atmos --skill atmos-version
Clone the repo
git clone --depth 1 https://github.com/cloudposse/atmos

Made for: Claude Code, Codex.

Or install atmos, the plugin that ships this one along with the rest of its 51 skills.

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 atmos-version

README.md
[![agentmods](https://agentmods.dev/badge/skills/cloudposse/atmos/atmos-version.svg)](https://agentmods.dev/skills/cloudposse/atmos/atmos-version)
Your own site
<a href="https://agentmods.dev/skills/cloudposse/atmos/atmos-version"><img src="https://agentmods.dev/badge/skills/cloudposse/atmos/atmos-version.svg" alt="Measured on agentmods" height="20"></a>
Per session 39 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,097 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00039 $0.01097
Opus 5 $0.00019 $0.00549
Sonnet 5 $0.00008 $0.00219
Haiku 4.5 $0.00004 $0.00110

Measured yesterday against content hash e2c51e4526d1, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

atmos-version 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 yesterday.

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.

agent-skills/skills/atmos-version/SKILL.md · 140 lines

How it starts

The opening of the file, as written. The whole thing — 140 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Atmos Version Tracker

Use this skill for Atmos-managed software versions under the top-level version: section of atmos.yaml.

The Version Tracker manages external dependency versions that Atmos should resolve, lock, apply to files, and verify. It is separate from the top-level atmos version command, which reports the Atmos CLI version.

Need Load
Tool installation from tracked versions atmos-toolchain
Vendored component source versions atmos-vendoring
Component source provisioning atmos-components
YAML !version function atmos-yaml-functions
CI gates for lock/file drift atmos-ci

Core Model

Version policy lives in atmos.yaml; resolved versions live in a lock file, usually versions.lock.yaml.

version:
  track: prod
  lock_file: versions.lock.yaml

  dependencies:
    checkout:
      ecosystem: github/actions
      datasource: github-tags
      package: actions/checkout
      desired: v6
      update:
        pin: sha

    opentofu:
      ecosystem: toolchain
      datasource: toolchain
      package: opentofu
      desired: "~1.10"

  tracks:
    prod:
      defaults:
        update:
          strategy: patch
          cooldown: 14d

Important concepts:

  • track: named lane such as dev, staging, or prod.
  • dependencies: base catalog of external versions.
  • tracks.<name>.dependencies: per-track overrides.
  • defaults, entry update, and groups: inherited update policy.
  • lock_file: resolved, deterministic versions read by runtime, file managers, and CI.
  • pin: sha / pin: digest: lock immutable Git SHAs or OCI digests.

Command Workflow

Use atmos version track (alias tracks) for the managed-version command group:

atmos version track list
atmos version track show prod
atmos version track add checkout --package=actions/checkout --pin=sha
atmos version track set checkout --desired=v6
atmos version track lock prod
atmos version track update prod --group=infrastructure
atmos version track status prod --format=json
atmos version track diff prod
atmos version track apply prod --check
atmos version track verify prod

Read the full file on GitHub · 140 lines

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. yesterday First seen · 140 lines · 39 tokens per session scan A e2c51e4526d1

Subscribe to this mod's changes

atmos-version is a skill published in the GitHub repository cloudposse/atmos (1,372 stars, last pushed today), licensed Apache-2.0. It adds 39 tokens to every session and 1,097 once invoked, about $0.0002 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 2026-09-03.

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