Release Overview

Core 2.5.1 is the current framework release. Review the notes for the version you are adopting and follow the compatibility policy. Core and adapter versions are independent; see Core support and the adapter directory.

Core version	Release notes
2.5.1	Security and behavior corrections
2.5.0	Conformance package and VFS hardening
2.4.0	Streaming quickstart, MCP examples, and recall benchmark
2.3.6	Formatter runtime and mutable-state fixes
2.3.5	Scheduler in-flight dispatch handling
2.3.4	JSON Schema semantics and HTTP failure tests
2.3.3	Final tool authorization and release gates
2.3.2	Changes and upgrade guidance
2.3.1	Changes and upgrade guidance
2.3.0	Changes and upgrade guidance
2.2.0	Changes and upgrade guidance
2.1.0	Changes and upgrade guidance

See the complete changelog for earlier history and the release requirements for artifact verification.