update-changelog

update-changelog is a skill for Claude Code from FradSer/dotclaude. It costs 76 tokens per session (1,502 once invoked), scanned A, original, MIT.

A changelog-maintenance task that creates or updates CHANGELOG.md using Keep a Changelog 1.1.0 and git tags as version boundaries. A changelog is a human-readable record of notable project changes.

In plain words
What is it for?
Use it to gather tags and history, group related changes, and maintain reverse-chronological release entries with ISO dates.
Why use it?
It turns commit history into dated, readable release notes without overwriting hand-edited entries or losing an Unreleased section.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter.

Part of the utils plugin — 2 skills shipped together

Good fit Use it to gather tags and history, group related changes, and maintain reverse-chronological release entries with ISO dates.

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

Made for: Claude Code.

Or install utils, the plugin that ships this one along with the rest of its 2 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 update-changelog

README.md
[![agentmods](https://agentmods.dev/badge/skills/fradser/dotclaude/update-changelog/github.svg)](https://agentmods.dev/skills/fradser/dotclaude/update-changelog)
Your own site
<a href="https://agentmods.dev/skills/fradser/dotclaude/update-changelog"><img src="https://agentmods.dev/badge/skills/fradser/dotclaude/update-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 update-changelog

Your own site · 80×15
<a href="https://agentmods.dev/skills/fradser/dotclaude/update-changelog"><img src="https://agentmods.dev/badge/skills/fradser/dotclaude/update-changelog.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 76 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,502 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.
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 $0.00076 $0.01502
Opus 5.5 $0.00030 $0.00601
Sonnet 5.5 $0.00015 $0.00300
Haiku 4.5 $0.00008 $0.00150

Measured 22d ago against content hash 14561684298f, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

update-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 22d 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.

utils/skills/update-changelog/SKILL.md · 165 lines

How it starts

The opening of the file, as written. The whole thing — 165 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Update Changelog

Create or update CHANGELOG.md following the Keep a Changelog 1.1.0 format, using git tags as version boundaries.

CRITICAL: Human-First Entries and Format

  • Do NOT copy commit messages verbatim. Changelogs are for humans -- readers who care about what changed and why, not how the code was modified. Group related commits into logical changes and write each entry as a clear, meaningful description.
  • The [Unreleased] section MUST always be present, even if empty.
  • Versions MUST be in reverse chronological order (newest first), with ISO 8601 dates (YYYY-MM-DD).
  • Omit empty categories -- only include categories that have entries.
  • When updating an existing changelog, preserve any hand-edited entries in existing version sections -- do not overwrite them.

See references/keepachangelog-format.md for the full format specification.

Process

1. Gather git tag and remote info

Run these commands to understand the project's release history:

git tag --sort=-v:refname
git log --oneline --decorate
git remote get-url origin

Collect:

  • All tags sorted by version (descending). Both v1.0.0 and 1.0.0 prefixes are valid -- detect which convention the project uses and stay consistent.
  • The remote URL to construct diff comparison links.
  • The hosting platform (GitHub, GitLab, Bitbucket) to pick the correct comparison URL pattern.

If no tags exist, inform the user and generate only an [Unreleased] section from the full commit history.

2. Check for existing CHANGELOG.md

Look for CHANGELOG.md (case-insensitive) in the project root.

  • Exists: Read it. Preserve any hand-written content. Only add or update version sections that are missing or incomplete.
  • Does not exist: Create a new file from scratch.

3. Build version sections from git history

For each pair of adjacent tags (newest to oldest), extract commits with their full messages:

git log --format="%h %s%n%b" <older-tag>..<newer-tag>

Read the full file on GitHub · 165 lines

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 22d ago First seen · 165 lines · 76 tokens per session scan A 14561684298f

Subscribe to this mod's changes

update-changelog is a skill published in the GitHub repository FradSer/dotclaude (593 stars, last pushed 7d ago), licensed MIT. It adds 76 tokens to every session and 1,502 once invoked, about $0.0003 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 2026-09-24.