changelog-gen

changelog-gen is a skill for Claude Code, Codex from 0xjitsu/jitsu-skills. It costs 98 tokens per session (1,199 once invoked), scanned A, original, AGPL-3.0.

A tool that turns a project’s Git history—the record of code changes—into a structured changelog, which is a summary of what changed between releases.

In plain words
What is it for?
It reads commits since the last Git tag, groups them as additions, fixes, changes, breaking changes, or internal work, and adds the result to CHANGELOG.md.
Why use it?
It saves developers from manually reading commits and sorting them into release-note categories.

Skill for Claude CodeCodex

Which agent this was written for is unclear — body not stored (licence); the path alone says nothing.

Good fit It reads commits since the last Git tag, groups them as additions, fixes, changes, breaking changes, or internal work, and adds the result to CHANGELOG.md.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/0xjitsu/jitsu-skills/changelog-gen
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 0xjitsu/jitsu-skills --skill changelog-gen
Clone the repo
git clone --depth 1 https://github.com/0xjitsu/jitsu-skills

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-gen

README.md
[![agentmods](https://agentmods.dev/badge/skills/0xjitsu/jitsu-skills/changelog-gen/github.svg)](https://agentmods.dev/skills/0xjitsu/jitsu-skills/changelog-gen)
Your own site
<a href="https://agentmods.dev/skills/0xjitsu/jitsu-skills/changelog-gen"><img src="https://agentmods.dev/badge/skills/0xjitsu/jitsu-skills/changelog-gen/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-gen

Your own site · 80×15
<a href="https://agentmods.dev/skills/0xjitsu/jitsu-skills/changelog-gen"><img src="https://agentmods.dev/badge/skills/0xjitsu/jitsu-skills/changelog-gen.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 98 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,199 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 unknown 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 $0.00098 $0.01199
Opus 5 $0.00049 $0.00600
Sonnet 5 $0.00020 $0.00240
Haiku 4.5 $0.00010 $0.00120

Measured 11d ago against content hash 19e40018019d, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

changelog-gen 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 11d 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-gen/SKILL.md · 163 lines

The source is not reproduced here

Licensed AGPL-3.0

The repository is licensed AGPL-3.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

Read it on GitHub

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. 11d ago First seen · 163 lines · 98 tokens per session scan A 19e40018019d

Subscribe to this mod's changes

changelog-gen is a skill published in the GitHub repository 0xjitsu/jitsu-skills (1 stars, last pushed 4mo ago), licensed AGPL-3.0. It adds 98 tokens to every session and 1,199 once invoked, about $0.0005 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

changelog-gen

A changelog generator that turns Git history into a version-by-version record of project changes. A changelog is a readable summary of new features, fixes, breaking changes, documentation, and other updates.

laolaoshiren/claude-code-skills-zh · 19 tokens

changelog-rules

Shared changelog conventions and formatting rules referenced by /create-changelog and /update-changelog. Not typically invoked directly.

tobihagemann/turbo · 29 tokens

update-changelog

Update the Unreleased section of CHANGELOG.md based on current changes. No-op if CHANGELOG.md does not exist. Use when the user asks to "update changelog", "add to changelog", "update the changelog", "changelog entry", "add changelog entry", or "log this change".

tobihagemann/turbo · 68 tokens

create-changelog

Create a CHANGELOG.md following keepachangelog.com conventions with version history backfilled from GitHub releases or git tags. Use when the user asks to "create a changelog", "add a changelog", "initialize changelog", "start a changelog", "set up changelog", "generate changelog", or "backfill changelog".

tobihagemann/turbo · 75 tokens

git

Granular git operations with conventional commits - stage, commit, push, PR, merge. Auto-splits commits by type/scope, blocks on secrets, delegates verbose work to git-manager subagent. GitHub CLI conventions: --body-file for PR bodies, treat gh pr checks exit 8 (pending) as retry not failure, guard run-id assignment…

vanducng/skills · 95 tokens

skill-management

Manage the lifecycle of agent skills in this repo - create new skills via skill-creator, pull/sync upstream skills with the vd CLI, validate frontmatter, bump versions, and ship releases through conventional commits. Use when the user says 'create a skill', 'add a skill', 'sync skills', 'release vd', 'bump version'…

vanducng/skills · 117 tokens