changelog-generator

changelog-generator is a skill for Claude Code, Codex from decebals/claude-code-java. It costs 40 tokens per session (2,442 once invoked), scanned A, original, MIT.

A release-note generator for Java projects that turns Git commit history into a changelog. It detects the project's version-number format before preparing the entries.

In plain words
What is it for?
Use it before a release, after a milestone, or when you need to update a CHANGELOG.md file from conventional commits.
Why use it?
It removes the need to review commits and work out the release format by hand. It can also show what changed since the previous release.

Skill for Claude CodeCodex

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

Good fit Use it before a release, after a milestone, or when you need to update a CHANGELOG.md file from conventional commits.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/decebals/claude-code-java/changelog-generator
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 decebals/claude-code-java --skill changelog-generator
Clone the repo
git clone --depth 1 https://github.com/decebals/claude-code-java

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-generator

README.md
[![agentmods](https://agentmods.dev/badge/skills/decebals/claude-code-java/changelog-generator/github.svg)](https://agentmods.dev/skills/decebals/claude-code-java/changelog-generator)
Your own site
<a href="https://agentmods.dev/skills/decebals/claude-code-java/changelog-generator"><img src="https://agentmods.dev/badge/skills/decebals/claude-code-java/changelog-generator/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-generator

Your own site · 80×15
<a href="https://agentmods.dev/skills/decebals/claude-code-java/changelog-generator"><img src="https://agentmods.dev/badge/skills/decebals/claude-code-java/changelog-generator.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 40 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,442 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. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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 $0.00040 $0.02442
Opus 5.5 $0.00016 $0.00977
Sonnet 5.5 $0.00008 $0.00488
Haiku 4.5 $0.00004 $0.00244

Measured 1mo ago against content hash 29c233be251b, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

changelog-generator 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 1mo 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-generator/SKILL.md · 339 lines

How it starts

The opening of the file, as written. The whole thing — 339 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Changelog Generator Skill

Generate changelogs from conventional commits for Java projects.

When to Use

  • Before a release
  • User says "generate changelog" / "update changelog" / "what changed since last release"
  • After completing a milestone

Versioning Convention Detection

Detect versioning style using this priority order:

1. Check CLAUDE.md (if exists)

grep -A5 "## Versioning" CLAUDE.md 2>/dev/null

Look for explicit convention:

## Versioning
This project uses Semantic Versioning (x.y.z).
Tag format: `release-x.y.z`

2. Fallback: Detect from git tags

git tag --sort=-version:refname | head -10
Pattern detected Versioning style
v3.15.0, 3.15.0 SemVer (x.y.z)
release-3.15.0 SemVer with prefix
v2.1, 2.1 Two-component (x.y)
2026.01, 26.1 CalVer
No pattern Ask user

3. Fallback: Detect from CHANGELOG.md

grep -E "^\#+ \[.*\]" CHANGELOG.md | head -5

Extract version format from existing entries.

4. Last resort: Ask user

No versioning convention detected. Which format does this project use?
- Semantic Versioning (x.y.z) - e.g., 3.15.0
- Two-component (x.y) - e.g., 2.1
- Calendar Versioning - e.g., 2026.01

Supported Versioning Styles

Style Format Tag examples Version bump
SemVer x.y.z v3.15.0, release-3.15.0 major.minor.patch
Two-component x.y v2.1, 2.1 major.minor
CalVer YYYY.MM[.patch] 2026.01, 2026.01.1 year.month[.patch]

Legacy Projects (CLAUDE.md without versioning section)

If CLAUDE.md exists but has no versioning info:

  1. Don't assume - detect from tags/changelog
  2. If detected, optionally suggest adding to CLAUDE.md:
    Detected versioning: SemVer (x.y.z) with tag prefix 'release-'
    Want me to add this to CLAUDE.md for future reference?
    

Output Format

Supports two formats - detect from existing CHANGELOG.md or ask user preference.

Read the full file on GitHub · 339 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. 1mo ago First seen · 339 lines · 40 tokens per session scan A 29c233be251b

Subscribe to this mod's changes

changelog-generator is a skill published in the GitHub repository decebals/claude-code-java (755 stars, last pushed 1mo ago), licensed MIT. It adds 40 tokens to every session and 2,442 once invoked, about $0.0002 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 2026-08-30.