changelog

changelog is a skill for Claude Code, Codex from cloudposse/atmos. It costs 65 tokens per session (2,423 once invoked), scanned A, original, Apache-2.0.

A writing guide for Atmos changelog blog posts stored as MDX files, including their metadata, tags, authors, and formatting rules.

In plain words
What is it for?
Use it when creating, editing, or reviewing Atmos posts in website/blog, including posts with optional embedded cast recordings.
Why use it?
It keeps release posts consistent and ensures that user-visible changes receive the required kind of announcement.

Skill for Claude CodeCodex

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

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 changelog

README.md
[![agentmods](https://agentmods.dev/badge/skills/cloudposse/atmos/changelog.svg)](https://agentmods.dev/skills/cloudposse/atmos/changelog)
Your own site
<a href="https://agentmods.dev/skills/cloudposse/atmos/changelog"><img src="https://agentmods.dev/badge/skills/cloudposse/atmos/changelog.svg" alt="Measured on agentmods" height="20"></a>
Per session 65 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,423 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 $0.00065 $0.02423
Opus 5 $0.00032 $0.01211
Sonnet 5 $0.00013 $0.00485
Haiku 4.5 $0.00006 $0.00242

Measured yesterday against content hash a2328fb6f62f, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

changelog 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.

.claude/skills/changelog/SKILL.md · 170 lines

How it starts

The opening of the file, as written. The whole thing — 170 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Changelog (Blog Post) Authoring

Use this skill whenever you create or edit a post under website/blog/. It is the single source of truth for the template, tags, authors, and style rules — CLAUDE.md, the pull-request skill, and the docs skill all point here instead of restating these rules. Don't re-duplicate them elsewhere.

When a post is required

Only non-draft PRs targeting main, labeled minor or major, need one — see the pull-request skill's label decision tree. CI enforces this via .github/workflows/changelog-check.yml, which checks for a new website/blog/*.md or *.mdx file (draft PRs, and PRs targeting a branch other than main, are exempt entirely). Write posts as .mdx regardless — Rule 3 below embeds <CastPlayer> as real JSX, which only .mdx renders; CI accepts .md but that's not this repo's convention. If a change is genuinely internal-only with zero user-visible effect, it doesn't get a post at all — that invariant belongs to the roadmap skill ("no changelog post for internal-only refactors"); don't work around it by writing an implementation-heavy post instead.

File and frontmatter

Create website/blog/YYYY-MM-DD-<slug>.mdx:

---
slug: descriptive-slug
title: "Clear Title"
authors: [username]
tags: [feature]
---
Open on the PAIN the reader already feels — the broken/tedious/confusing thing they live with
today — then name the change as the relief.
<!--truncate-->
## The Problem
...
## The Fix
...
## How to Use It
...
## Get Involved
  • .mdx, YAML frontmatter, <!--truncate--> immediately after the intro paragraph(s) — that's what shows in the blog feed.
  • Never open the body with ## What Changed — lead with the problem (see Rule 1).

Tags — read website/blog/tags.yml, never invent one

User-facing: feature, enhancement, bugfix, dx, breaking-change, security, documentation, deprecation, experimental, atmos-pro. Internal/contributor-only, zero user impact: core.

Read the full file on GitHub · 170 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 Changed · +24 lines a2328fb6f62f
  2. 5d ago First seen · 146 lines · 65 tokens per session scan A 84f3e7f4681c

Subscribe to this mod's changes

changelog is a skill published in the GitHub repository cloudposse/atmos (1,372 stars, last pushed today), licensed Apache-2.0. It adds 65 tokens to every session and 2,423 once invoked, about $0.0003 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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