changelog

changelog is a skill for Claude Code, Codex from aaronjmars/aeon-agent. It costs 47 tokens per session (5,817 once invoked), scanned C, a copy of changelog, MIT.

A tool for creating user-facing changelogs from recent commits and pull requests across watched code repositories. It writes summaries in Keep a Changelog format, a common structure for grouping releases by changes users can understand.

In plain words
What is it for?
Writing a changelog in a repository or opening a changelog pull request in a separate documentation or marketing repository.
Why use it?
It turns technical commit history into a plain-language release summary and filters out internal work that users do not need to see.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: mentions CLAUDE.md; mentions Claude Code.

Good fit Writing a changelog in a repository or opening a changelog pull request in a separate documentation or marketing repository.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/aaronjmars/aeon-agent/changelog
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 aaronjmars/aeon-agent --skill changelog
Clone the repo
git clone --depth 1 https://github.com/aaronjmars/aeon-agent

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/aaronjmars/aeon-agent/changelog/github.svg)](https://agentmods.dev/skills/aaronjmars/aeon-agent/changelog)
Your own site
<a href="https://agentmods.dev/skills/aaronjmars/aeon-agent/changelog"><img src="https://agentmods.dev/badge/skills/aaronjmars/aeon-agent/changelog/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 changelog

Your own site · 80×15
<a href="https://agentmods.dev/skills/aaronjmars/aeon-agent/changelog"><img src="https://agentmods.dev/badge/skills/aaronjmars/aeon-agent/changelog.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 47 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 5,817 The whole file, excluding the scripts and references it only reads on demand.
Security scan C 2 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin 100% copy Near-identical to another mod 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 $0.00047 $0.05817
Opus 5 $0.00023 $0.02908
Sonnet 5 $0.00009 $0.01163
Haiku 4.5 $0.00005 $0.00582

Measured 4d ago against content hash 963c9d733523, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade C, and why

changelog scanned grade C with 2 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 4d 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.

Recursive force deletehighDestructive command

rm -rf with a variable or a broad path is one typo away from removing the wrong tree.

rm -rf "$WORK_DIR"

Makes network callslowCapability

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

The window is the primary filter; the published-PR dedup in step B.2 is the idempotency guard against overlap and re-runs. Sandbox: if `gh api` fails transiently, retry once. Never use `curl` for the GitHub API — `gh` ha
Origin

This is a copy

100% identical to changelog — 2 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

skills/changelog/SKILL.md · 410 lines

How it starts

The opening of the file, as written. The whole thing — 410 lines — stays where its author put it; the contents beside it link to each section on GitHub.

${var} — Selects the mode and target:

  • empty → in-repo changelog across every repo in memory/watched-repos.md.
  • owner/repo (bare slug) → in-repo changelog for that single repo only.
  • push-to:owner/website-repo → cross-repo mode: publish the product's merged PRs as a changelog PR on owner/website-repo (product repo comes from memory/docs-sync.md).
  • owner/product->owner/website (arrow form) → cross-repo mode with both product and website repos given explicitly.

Why this skill exists

A changelog is not a commit log. Raw commit dumps grouped by conventional prefix are the noise anti-pattern — users can't tell what matters. This skill produces a Keep a Changelog-style summary: categorized, plain-English, breaking changes surfaced, internal churn filtered out. It runs in two modes: in-repo (write the article into this repo) or push-to (open a changelog PR on a separate marketing/docs website repo).


0. Preamble — read memory and parse the selector

Read memory/MEMORY.md and the last 3 days of memory/logs/ for context (prior runs, known issues). Before notifying, drop anything already reported in that window.

Parse ${var} to pick the branch:

${var} Branch Target
empty A — in-repo all repos in memory/watched-repos.md
owner/repo (no push-to:, no ->) A — in-repo only that repo
push-to:owner/website-repo B — push-to website = owner/website-repo; product = config product_repo
owner/product->owner/website B — push-to product = owner/product; website = owner/website

Disambiguation: a push-to: prefix or a -> arrow selects Branch B; anything else (empty or a bare owner/repo) selects Branch A. Then jump to the matching branch below.

Read the full file on GitHub · 410 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. 4d ago Changed · +4 lines 963c9d733523
  2. 9d ago First seen · 406 lines · 47 tokens per session scan C 48ae451ff50c

Subscribe to this mod's changes

changelog is a skill published in the GitHub repository aaronjmars/aeon-agent (11 stars, last pushed today), licensed MIT. It adds 47 tokens to every session and 5,817 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it C with 2 findings (recursive force delete, makes network calls). It is 100% identical to changelog, differing in 2 lines, and is treated as a copy.