Features
C# NativeAOT monomorphized dispatch
Generated C# module exports now dispatch directly to statically-known generic entrypoints for reducers, procedures, HTTP handlers, views, and anonymous views when building with NativeAOT-LLVM. This eliminates virtual dispatch overhead at the module boundary and improves NativeAOT module performance.
(#5610)
MCP support on Maincloud
The SpacetimeDB MCP endpoint (/v1/mcp) is now available on Maincloud. You can connect AI agents and MCP-compatible tools directly to your Maincloud databases. This release also adds cluster-aware routing so that MCP requests sent to any node are automatically proxied to the leader replica, along with egress tracking for MCP tool calls.
Bug Fixes
TypeScript SDK: route mid-session websocket errors to onDisconnect
The TypeScript SDK's ws.onerror handler previously treated every websocket error as a connection failure, even on established connections. This fired onConnectError instead of onDisconnect, silently disabled the outbound send path, and left the client in a stalled state with no reconnect. Mid-session errors now close the socket and fire onDisconnect with the error, allowing existing reconnect handling to take over.
(#5707)
Fix C++ auto-increment macro symbol collisions
C++ auto-increment field macros previously used __LINE__ to generate symbols, causing collisions when two table definitions in separate files had an auto-increment field on the same line number. Macros now use table and field names to guarantee unique symbols.
(#5836)
Fix spacetime dev C# complaint on macOS
The spacetime dev command no longer incorrectly warns about C# on macOS when C# is not in use.
(#5867)
What's Changed
- Allow monomorphization for C# NativeAOT reducers, procedures, HTTP handlers, and views in #5610
- Add MCP request routing to leader replica in #5849
- Add egress tracking for MCP requests in #5793
- Route TypeScript SDK mid-session websocket errors to onDisconnect in #5707
- Fix C++ auto-increment macro symbol collisions in #5836
- Fix
spacetime devC# warning on macOS in #5867
Full Changelog: v2.9.0...v2.10.0