atmos: Skill for Claude Code

.claude/skills/docs/SKILL.md

docs is a skill for Claude Code from cloudposse/atmos. It costs 31 tokens per session (1,000 once invoked), scanned A, original, Apache-2.0.

A documentation guide for the Atmos website, command-line tool, configuration, changelog, roadmap, and contributor instructions.

In plain words
What is it for?
Use it when adding or changing Atmos documentation, especially command references, atmos.yaml settings, action cards, changelog posts, or roadmap entries.
Why use it?
It helps keep documentation aligned with the code and prevents outdated claims or missing configuration details.

Skill for Claude Code

Written for Claude Code: installed under .claude/. Also seen: reads .claude/ paths.

This is cloudposse/atmos's own configuration. It tells Claude Code how to work on atmos itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything atmos configures →

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 · 1,403 stars · on GitHub · atmos.tools

Reuse

Borrowing it

Nothing to install: this file belongs to cloudposse/atmos. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/cloudposse/atmos/main/.claude/skills/docs/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/cloudposse/atmos

Made for: Claude Code.

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 docs

README.md
[![agentmods](https://agentmods.dev/badge/skills/cloudposse/atmos/docs/github.svg)](https://agentmods.dev/skills/cloudposse/atmos/docs)
Your own site
<a href="https://agentmods.dev/skills/cloudposse/atmos/docs"><img src="https://agentmods.dev/badge/skills/cloudposse/atmos/docs/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for docs

Your own site · 80×15
<a href="https://agentmods.dev/skills/cloudposse/atmos/docs"><img src="https://agentmods.dev/badge/skills/cloudposse/atmos/docs.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 31 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,000 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. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 3 findings, up to medium

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • medium Agent Snooping · line 19
    Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.
    Fix: Remove all code or instructions that list or read other skills' files or directories. Skills should operate independently; cross-skill access is a privilege escalation.
  • medium Agent Snooping · line 26
    Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.
    Fix: Remove all code or instructions that list or read other skills' files or directories. Skills should operate independently; cross-skill access is a privilege escalation.
  • medium Agent Snooping · line 76
    Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.
    Fix: Remove all code or instructions that list or read other skills' files or directories. Skills should operate independently; cross-skill access is a privilege escalation.
How audits are shown
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 $0.00031 $0.01000
Opus 5.5 $0.00012 $0.00400
Sonnet 5.5 $0.00006 $0.00200
Haiku 4.5 $0.00003 $0.00100

Measured 1mo ago against content hash 7b65a9919c3e, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

docs 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 1mo 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.

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.

.claude/skills/docs/SKILL.md · 107 lines

How it starts

The opening of the file, as written. The whole thing — 107 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Docs

Use this skill when changing documentation for Atmos itself: website docs, CLI command docs, atmos.yaml configuration docs, changelog posts, roadmap entries, and project-local contributor guidance.

First Pass

Before editing, inspect the related implementation and existing docs:

rg -n "<feature>|<config-key>|<command>" website/docs docs agent-skills .claude/skills
rg -n "<feature>|<config-key>|<command>" pkg cmd internal

Search for stale claims before finishing:

rg -n "unsupported|not supported|not currently|not enforced|TODO|coming soon" website/docs docs agent-skills .claude/skills

Configuration Docs

Every new or changed atmos.yaml section needs configuration docs.

  • Add or update the parent page under website/docs/cli/configuration/.
  • Add a child page when a nested section has independent behavior, policies, defaults, or command-facing effects.
  • Keep parent pages as summaries when child pages exist; link to the child page for details.
  • Use <File title="atmos.yaml"> for config examples.
  • Use <dl>, <dt>, and <dd> for configuration keys and option definitions.
  • Include defaults, supported values, and environment variables when they are part of the public interface.

For configuration docs, make the sidebar resemble the YAML hierarchy.

  • Parent categories may link to the page for the object they represent.
  • Prefer visible labels that are config keys or object names, such as workflows, workflow, steps, and env.
  • Avoid editorial labels like "Overview", "Execution", or "Runtime Context" when the page represents a configuration object.
  • Do not promote enum values or type-specific parameters to sidebar peers unless they are independent configuration objects.
  • When possible, use folder structure plus _category_.json so autogenerated sidebar entries inherit the YAML-shaped hierarchy from the docs tree.
  • If site-level sidebar sorting prevents YAML-order rendering, use explicit sidebar entries for that section rather than changing global sidebar behavior.

Read the full file on GitHub · 107 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. 1mo ago First seen · 107 lines · 31 tokens per session scan A 7b65a9919c3e

Subscribe to this mod's changes

docs is a skill published in the GitHub repository cloudposse/atmos (1,403 stars, last pushed today), licensed Apache-2.0. It adds 31 tokens to every session and 1,000 once invoked, about $0.0001 per session on Opus 5.5. 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.