fix: re-export SDK version constants from generated index

The generated/ module now exports SDK version constants alongside
the auto-generated schemas:

- LATEST_PROTOCOL_VERSION (SDK production version, not spec draft)
- DEFAULT_NEGOTIATED_PROTOCOL_VERSION
- SUPPORTED_PROTOCOL_VERSIONS
- JSONRPC_VERSION

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: ochafik

src/generated/index.ts

@@ -1,22 +1,27 @@
 /**
- * Generated Zod schemas from spec.types.ts with SDK-specific extensions.
+ * Generated Zod Schemas from MCP Specification
  *
- * This module re-exports all generated schemas and adds SDK-specific schemas
- * that are not part of the MCP specification but are needed for SDK functionality.
+ * This module provides auto-generated Zod schemas from spec.types.ts,
+ * plus SDK version constants.
  *
- * ## Usage
+ * For production use with SDK-specific refinements and extras,
+ * import from '@modelcontextprotocol/sdk/types.js'.
  *
- * For now, continue using `@modelcontextprotocol/sdk/types.js` for production.
- * This generated module is available for reference and comparison.
- *
- * ## Structure
- *
- * - `spec.schemas.ts` - Auto-generated from spec.types.ts via ts-to-zod
- * - `index.ts` (this file) - Re-exports + SDK-specific extras
+ * @see spec.types.ts - Source TypeScript interfaces from MCP spec
+ * @see spec.schemas.ts - Auto-generated Zod schemas
+ * @see ../types.ts - Production schemas with SDK refinements
  */
 
 // Re-export all generated schemas
 export * from './spec.schemas.js';
 
-// Re-export types from spec (for convenience)
+// Re-export spec types (interfaces/types from MCP specification)
 export * from '../spec.types.js';
+
+// Re-export SDK version constants (these differ from spec's DRAFT version)
+export {
+    LATEST_PROTOCOL_VERSION,
+    DEFAULT_NEGOTIATED_PROTOCOL_VERSION,
+    SUPPORTED_PROTOCOL_VERSIONS,
+    JSONRPC_VERSION,
+} from '../types.js';