Epistates/TurboMCP

Added

• Explicit Transport Selection with transports Attribute: New optional macro parameter for specifying which transports a server uses
  • Reduces generated code by only creating methods for specified transports
  • Eliminates cfg warnings on Nightly Rust when transports are specified
  • Supported values: stdio, http, websocket, tcp, unix
  • Example: #[server(name = "my-server", version = "0.1.0", transports = ["stdio"])]
  • Compile-time validation with helpful error messages
  • Fully backward compatible (omitting attribute generates all transports as before)

Changed

• Schema-Generation Now Unconditional: Moved schemars from optional to always-enabled dependency

  • Schema generation is now available by default (required for MCP spec compliance)
  • Only affects build-time dependencies (zero runtime overhead)
  • Simplified mental model: users don't have to remember to enable schema-generation feature
  • Still works with default-features = false if needed

• Macro Warnings Strategy: Removed #[allow(unexpected_cfgs)] from generated code

  • Cfg warnings on Nightly Rust now provide actionable guidance
  • Guides users toward explicit transport specification
  • Cleaner design: warnings point to solutions rather than hiding issues
  • Stable Rust (1.89+) unaffected (no warnings by default)

Fixed

• Code Quality: Removed anti-pattern of suppressing warnings in generated code
• Schema Module: Removed fallback implementations and unused cfg guards

Technical Details

• Added transport validation in attrs.rs
• Conditional method generation in bidirectional_wrapper.rs
• Wire transport attribute through macro pipeline in server.rs and compile_time_router.rs
• Added comprehensive examples/transports_demo.rs showing all usage patterns

Backward Compatibility

• ✅ Zero breaking changes
• ✅ All existing code continues to work
• ✅ Fully backward compatible with 2.0.3

Special Thanks:

https://github.com/IgnisDa for #1