Generate Changelog

Generate a changelog for the current repository using parallel agents.

Steps

1. Launch two agents in parallel:

   • Agent A – Git Analyst: Run git log --oneline since the last tag (or last 50 commits if no tags). Collect commit messages and categorize them into: feat, fix, breaking, chore, docs, other.
   • Agent B – PR/Issue Analyst: Run git log --oneline and look for PR numbers or issue references in commit messages. List them with their descriptions.

2. Wait for both agents to finish.

3. Combine their output and write a CHANGELOG.md entry in this format:

## [version] – YYYY-MM-DD

### Breaking Changes
- ...

### Features
- ...

### Bug Fixes
- ...

### Other
- ...

Use today's date. If no version is provided, use Unreleased.