changelog

Generate changelog

Run the helper script to parse git history, then present and optionally write the results.

Inputs

• $ARGUMENTS — optional version tag or commit range (e.g., v1.3.0, v1.2.0..v1.3.0, HEAD~20..HEAD)

Steps

1. Run the helper script

python scripts/parse_commits.py $ARGUMENTS

Capture the JSON output. The script handles range detection, commit parsing, conventional commit classification, keyword heuristics, PR/issue extraction, and deduplication.

Max 200 commits per run.

2. Handle errors

If the JSON contains an error field:

• not_a_git_repo — tell user to run from inside a git repository
• no_commits — tell user no commits were found in the given range, suggest a different range

Stop here on error.

3. Present the changelog entry

Using the categories object from the JSON, format a Keep a Changelog entry:

## [Unreleased] - YYYY-MM-DD

### Breaking Changes
- {text from entries}

### Added
- {text from entries}

### Changed
- {text from entries}

### Fixed
- {text from entries}

### Removed
- {text from entries}

### Security
- {text from entries}

Only include categories that have entries. Use the text field from each entry directly — the script already formats entries with imperative mood and PR references.

Show the user:

• Number of commits analyzed (total_commits_analyzed)
• Number of entries generated (total_changelog_entries)
• Number skipped as internal (total_skipped)
• The full formatted entry

4. Ask the user

Ask whether they want to:

1. Write the entry to CHANGELOG.md
2. Just see the output (done)

5. Write to CHANGELOG.md

If the user wants to write:

If CHANGELOG.md exists:

• Read it with the Read tool
• Insert the new entry after the file header (before the first ## [ line)
• Preserve all existing content

If CHANGELOG.md does not exist:

• Create it with the standard header:

# Changelog

All notable changes to this project will be documented in this file.

The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).

{generated entry here}