Update Changelog

Add a new entry to the project's CHANGELOG.md file: $ARGUMENTS

Usage Examples

• /add-to-changelog 1.1.0 added "New markdown to BlockDoc conversion feature"
• /add-to-changelog 1.0.2 fixed "Bug in HTML renderer causing incorrect output"

Current Changelog State

• Existing changelog: @CHANGELOG.md (if exists)
• Project version files: @package.json or @setup.py (if exists)

Task

Add the specified change entry to CHANGELOG.md:

Arguments:

• Version: First argument (e.g., "1.1.0")
• Change Type: Second argument (added/changed/deprecated/removed/fixed/security)
• Message: Third argument (description of the change)

Requirements:

1. Create CHANGELOG.md with standard header if it doesn't exist
2. Find or create version section with today's date
3. Add entry under appropriate change type section
4. Follow Keep a Changelog format and Semantic Versioning
5. Update package version files if this is a new version

The changelog should follow Keep a Changelog format.