Changelog Communication Cycle overview

Coordinates multi-channel changelog communication for product releases -- aggregating merged PRs and commit messages into human-readable changelog entries, categorizing changes by impact level (breaking, feature, fix, deprecation), drafting release blog posts and developer newsletter content, updating API reference documentation, preparing migration guides for breaking changes, coordinating announcement timing across social media, community forums, and in-product notifications, and tracking developer acknowledgment of breaking changes. Produces changelog, release announcement assets, and communication audit trail. Excludes release engineering.