What changed in each release.

v1.1.2

Latest release

• Kept mcp::core::Result on tl::expected for stable C++17/C++23 static-library compatibility
• Removed unused plugin/adapters extension targets and unused vendored tcb span
• Added an opt-in Streamable HTTP benchmark target
• Cleaned stale release docs and root TODO noise

v1.1.1

• Implemented SEP-1699 SSE retry/reconnection in the SDK client HTTP transport
• Fixed SSEClient last_event_id_ tracking for priming events with empty data
• Updated conformance status: server 109/110, client 448/448 (OpenSSL)

v1.1.0

• Separated HTTP transport behind CXXMCP_ENABLE_HTTP compile-time flag (default OFF) so the core SDK builds without cpp-httplib
• Added CXXMCP_ENABLE_AUTH flag to the release-blocking CI matrix
• Fixed CMake export set to include cpp_httplib when HTTP is enabled
• Fixed CI validation scripts for VERSION-file variable references
• Added MinGW provisional compatibility policy documentation

v1.0.0

• Added explicit protocol-version coverage for the 2025-11-25 MCP snapshot
• Added lightweight WWW-Authenticate parser to optional cxxmcp::auth surface
• Changed default in-memory token store to keep entries separated by resource/issuer/client key
• Documented external cxxmcp-examples auth-lite coverage

v1.0.0 (pre-release)

• Reframed public SDK around Peer / Service entry points
• Added HTTP URI and auth header support for client transport
• Added HTTP auth-lite server behavior with configurable WWW-Authenticate
• Added optional cxxmcp::auth scaffold target for OAuth 2.1 / DPoP
• Applied client HTTP bearer-token helpers to POST, SSE GET, and session DELETE
• Added ClientPeer and ServerPeer examples
• Routed all request handling through Peer boundary (tools, prompts, resources, completions, sampling, logging, tasks)
• Added cancellation-aware client inbound handler overloads
• Added ServerBuilder::with_handler() for aggregate handler installation