Go 1.27 draft release notes describe generic methods, encoding/json/v2 backing encoding/json, and a post-quantum crypto/mldsa package

Sources: draft release notes, third-party tour, HN discussion
Summary: The Go 1.27 draft release notes describe generic methods, a switch of encoding/json to the encoding/json/v2 implementation, and a new post-quantum crypto/mldsa package. Go 1.27 is not released. The draft notes state the release is expected in August 2026.
Comments: The Hacker News submission points at a third-party interactive tour of the changes rather than an official announcement.
Why it matters: Replacing the encoding/json implementation and adding generic methods touches nearly every Go codebase, and the release is expected in August 2026 so the migration window is now.
Follow-up: Track the actual Go 1.27 release and the final release notes.