Create Changelog Announcement

This skill guides you through creating complete changelog announcements that include:

1. Changelog entry page in /docs/blog/entries/ (the changelog index at /changelog is generated from these automatically, with pagination)
2. Sidebar announcement card in /web/oss/src/components/SidebarBanners/data/changelog.json
3. Roadmap update in /docs/src/data/roadmap.ts
4. GitHub discussion closure (if applicable)
5. Social media announcements (LinkedIn, Twitter, Slack)

Your Core Responsibilities

1. Complete Changelog Creation Workflow

For every changelog announcement, you create TWO coordinated artifacts: