changelog

changelog is a skill for Claude Code, Codex from jnMetaCode/skillet. It costs 39 tokens per session (503 once invoked), scanned A, original, MIT.

A guide for creating or updating CHANGELOG.md, a file that records user-visible changes between software releases. It uses Keep a Changelog sections and semantic versioning, a convention for choosing version numbers based on the kind of change.

In plain words
What is it for?
Use it when preparing a release, tagging a version, or summarising what changed since an earlier release.
Why use it?
It turns raw Git commits into a short upgrade summary instead of leaving users to interpret internal implementation details. It also helps select an appropriate release version.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it when preparing a release, tagging a version, or summarising what changed since an earlier release.

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

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/jnmetacode/skillet/changelog/github.svg)](https://agentmods.dev/skills/jnmetacode/skillet/changelog)
Your own site
<a href="https://agentmods.dev/skills/jnmetacode/skillet/changelog"><img src="https://agentmods.dev/badge/skills/jnmetacode/skillet/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/jnmetacode/skillet/changelog"><img src="https://agentmods.dev/badge/skills/jnmetacode/skillet/changelog.svg" alt="Reviewed on agentmods" width="80" 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 503 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 $0.00039 $0.00503
Opus 5 $0.00019 $0.00251
Sonnet 5 $0.00008 $0.00101
Haiku 4.5 $0.00004 $0.00050

Measured 9d ago against content hash 52ab2e0c3b7c, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, 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 9d 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.

skills/changelog/SKILL.md · 46 lines

What it actually says

changelog

A changelog is for users deciding whether to upgrade, not a commit dump. Format: Keep a Changelog + semver sections.

Procedure

  1. Find the range. Last release tag: git describe --tags --abbrev=0. Collect commits since: git log <tag>..HEAD --oneline --no-merges.

  2. Bucket each commit:

    • Added (feat) · Fixed (fix) · Changed (behavior changes, perf)
    • Deprecated · Removed · Security
    • Drop pure chore/ci/test/docs noise unless user-visible.
  3. Rewrite each line user-first. Translate implementation into impact:

    • commit: fix(ingest): treat mtime regressions as edits
    • entry: Fixed duplicate chunks after restoring files from backup. One line each; link the PR/issue number when the repo uses them.
  4. Squash threads. Five commits iterating on one feature = one entry.

  5. Pick the version bump from the buckets: breaking → major, Added → minor, only Fixed → patch (pre-1.0: breaking → minor).

  6. Write the section at the top of CHANGELOG.md:

    ## [0.2.0] - 2026-06-10
    ### Added
    - Live re-indexing: `engram watch` picks up edits automatically.
    ### Fixed
    - Duplicate chunks after restoring files from backup.
    
  7. Keep an ## [Unreleased] section at the very top for changes landing between releases; releasing = renaming it and starting a fresh one.

Quality bar

Every entry answers: what can I do now / what stopped being broken? If an entry needs the source code to make sense, rewrite it.

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. 9d ago First seen · 46 lines · 39 tokens per session scan A 52ab2e0c3b7c

Subscribe to this mod's changes

changelog is a skill published in the GitHub repository jnMetaCode/skillet (1 stars, last pushed 2mo ago), licensed MIT. It adds 39 tokens to every session and 503 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 2026-08-31.

Related

Other skills, from other repositories

release-management

Automates GitHub releases with semantic versioning, changelog generation from merged PRs, and gh CLI integration. Supports draft, prerelease, and standard release workflows with task-tracked multi-phase execution. Use when creating releases, tagging versions, or publishing changelogs.

yonatangross/orchestkit · 58 tokens

release-sync

Syncs latest release content to NotebookLM and HQ Knowledge Base after version tagging. Reads CHANGELOG, CLAUDE.md, and hook README, updates notebook sources, and ingests release digest. Optionally generates podcast from updated knowledge base. Use after tagging a new version to propagate release knowledge.

yonatangross/orchestkit · 62 tokens

write-changelog

Generates a CHANGELOG.md entry for a release by summarizing git commits since the last tag. Groups changes by type: Added, Changed, Fixed, Removed. Follows Keep a Changelog format (https://keepachangelog.com). Invoked when the user asks to update the changelog, write release notes, or prepare a release.

soulcodex/agentic · 73 tokens

Release Engineering

Semantic versioning, changelog generation, and release/hotfix management so releases are predictable and reversible.

niels-emmer/myace · 24 tokens

release-deploy

Release and deploy via GitHub tags and GitHub Actions (not every commit). Creates production releases from main and beta releases from staging using the GitHub CLI. Use when the user asks to release, ship, deploy, cut a version, tag a release, publish beta/production, create a GitHub Release, or bump a semver tag. On…

afaraha8403/balakit · 94 tokens

release-manager

A release-management tool for calculating semantic versions, generating changelogs and release notes, creating tags, and preparing releases. Semantic versioning uses version numbers to describe the scale of changes.

chainlesschain/chainlesschain · 22 tokens