Automatically Generating Changelogs from Git Commits with Claude: A Complete Guide

The Changelog Generator skill in the ComposioHQ/awesome-claude-skills repository enables Claude to automatically scan git history, categorize commits, and format professional changelogs using only markdown prompts without external scripts or dependencies.

The changelog-generator skill provides a pure-markdown method for automatically generating changelogs from git commits with Claude, eliminating the need for custom parsers or CI/CD pipelines. This skill, housed in the ComposioHQ/awesome-claude-skills repository, leverages Claude's LLM capabilities to interpret commit messages, classify changes, and output structured release notes directly from your git history.

Changelog Generator Skill Architecture

The skill definition resides in changelog-generator/SKILL.md and follows the standard Claude Skills pattern with YAML front-matter and a structured markdown body.

Metadata Declaration

The file opens with YAML front-matter declaring the skill name (changelog-generator) and a concise description of its purpose. This metadata allows Claude to identify when to invoke the skill based on user intent.

Runtime Instruction Sections

The markdown body contains four critical sections that Claude reads at runtime:

• When to Use This Skill — Outlines scenarios including release-note preparation, weekly summaries, and app-store submissions
• What This Skill Does — Enumerates Claude's steps: scanning git history, categorizing commits, translating technical messages into user-friendly language, formatting output, filtering noise, and applying best-practice guidelines
• How to Use — Provides three usage patterns expressed as plain-text prompts
• Example Output — Shows a fully-rendered markdown changelog demonstrating the final structure

How to Automatically Generate Changelogs from Git Commits with Claude

When you invoke the skill, Claude executes git commands to retrieve commit messages within the requested range, applies heuristic classification to group commits by type (features, improvements, fixes), and rewrites technical messages into plain English while preserving intent.

Basic Usage Patterns

You can trigger the Changelog Generator using natural language prompts.

For commits since the last tag:

Create a changelog from commits since last release

For a specific date range:

Create a changelog for all commits between March 1 and March 15

For custom style guidelines:

Create a changelog for commits since v2.4.0, using my changelog guidelines from CHANGELOG_STYLE.md

Saving Output to File

To write the generated changelog directly to your repository, add a follow-up instruction:

Save the generated changelog to CHANGELOG.md

Programmatic Integration with the Claude Skills API

When using the Claude Skills API, include the skill identifier changelog-generator in the skills array and pass your prompt as a user message.

Example implementation in Python:

import anthropic

client = anthropic.Anthropic(api_key="YOUR_API_KEY")
response = client.messages.create(
    model="claude-3-5-sonnet-20241022",
    skills=["changelog-generator"],
    messages=[{"role": "user", "content": "Create a changelog for commits from the past 7 days"}]
)
print(response.content)

Zero-Dependency Architecture

Unlike traditional changelog tools that require Node.js packages, Python scripts, or GitHub Actions, this skill requires no external scripts or runtime dependencies. All heavy-lifting—including git parsing, categorization, and language transformation—is performed by Claude's LLM itself.

This architecture makes the skill portable across Claude.ai, Claude Code, and the Claude API without installation steps or version conflicts.

Summary

• The Changelog Generator skill is defined in changelog-generator/SKILL.md within the ComposioHQ/awesome-claude-skills repository
• It uses a four-section markdown structure (When to Use, What This Skill Does, How to Use, Example Output) to guide Claude's behavior
• You can invoke it via natural language prompts for basic usage, date ranges, or custom style guidelines
• The Claude Skills API accepts the skill identifier changelog-generator in the skills array for programmatic access
• The approach requires zero dependencies because Claude handles all git parsing and text transformation internally

Frequently Asked Questions

Does the Changelog Generator skill require installing any git hooks or npm packages?

No. The skill requires no external scripts or runtime dependencies. Claude performs all git parsing, commit categorization, and language transformation using its built-in capabilities, making it portable across any environment where Claude runs.

Can I customize the formatting style of generated changelogs?

Yes. You can reference external style guidelines by instructing Claude to use a specific file, such as: "Create a changelog for commits since v2.4.0, using my changelog guidelines from CHANGELOG_STYLE.md". Claude will analyze your style file and apply those conventions to the output.

How does Claude determine which commits belong in which category?

Claude applies a heuristic classification system that analyzes commit message content to group entries into categories like features, improvements, fixes, and other types. The LLM interprets the technical intent of each message and translates internal jargon into user-friendly language while preserving the original meaning.

Is this skill compatible with Claude Code and the Anthropic API, or only the web interface?

The skill works across all Claude platforms including Claude.ai, Claude Code, and the Claude API. When using the API, you must include "changelog-generator" in the skills array of your request, as shown in the Python implementation example.

{
  "mcpServers": {
    "instagit": {
      "command": "npx",
      "args": ["-y", "instagit@latest"]
    }
  }
}