# MCP Serialization Coverage Report

## ✅ Request Types (All Covered)
- [x] InitializeRequest
- [x] PingRequest  
- [x] CompleteRequest
- [x] SetLevelRequest
- [x] CallToolRequest
- [x] ListToolsRequest
- [x] GetPromptRequest
- [x] ListPromptsRequest
- [x] ReadResourceRequest
- [x] ListResourcesRequest
- [x] ListResourceTemplatesRequest
- [x] SubscribeRequest
- [x] UnsubscribeRequest
- [x] ListRootsRequest
- [x] CreateMessageRequest
- [x] ElicitRequest
- [x] PaginatedRequest (base type)
- [x] jsonrpc::Request (base type)

## ✅ Response/Result Types (All Covered)
- [x] InitializeResult
- [x] CompleteResult
- [x] CallToolResult
- [x] ListToolsResult
- [x] GetPromptResult
- [x] ListPromptsResult
- [x] ReadResourceResult
- [x] ListResourcesResult
- [x] ListResourceTemplatesResult
- [x] ListRootsResult
- [x] CreateMessageResult
- [x] ElicitResult
- [x] EmptyResult
- [x] PaginatedResult (base type)
- [x] jsonrpc::Response
- [x] jsonrpc::ResponseResult

## ✅ Notification Types (All Covered)
- [x] InitializedNotification
- [x] CancelledNotification
- [x] ProgressNotification
- [x] RootsListChangedNotification
- [x] LoggingMessageNotification
- [x] ResourceUpdatedNotification
- [x] ResourceListChangedNotification
- [x] ToolListChangedNotification
- [x] PromptListChangedNotification
- [x] jsonrpc::Notification (base type)

## ✅ Core Data Structures (All Covered)
### Content Types
- [x] TextContent
- [x] ImageContent
- [x] AudioContent
- [x] ResourceContent
- [x] ContentBlock (variant)
- [x] ExtendedContentBlock (variant with ResourceLink, EmbeddedResource)
- [x] ResourceLink (handled in ExtendedContentBlock)
- [x] EmbeddedResource (handled in ExtendedContentBlock)

### Resource Types
- [x] Resource
- [x] ResourceTemplate
- [x] ResourceContents (base)
- [x] TextResourceContents
- [x] BlobResourceContents
- [x] Root

### Tool & Prompt Types
- [x] Tool
- [x] ToolParameter (handled within Tool)
- [x] ToolAnnotations
- [x] Prompt
- [x] PromptArgument (handled within Prompt)
- [x] PromptMessage
- [x] PromptReference

### Message Types
- [x] Message
- [x] SamplingMessage
- [x] ModelPreferences
- [x] ModelHint
- [x] SamplingParams

### Error Types
- [x] Error
- [x] ErrorData (variant)

### Reference Types
- [x] ResourceTemplateReference
- [x] PromptReference

### Annotation Types
- [x] Annotations
- [x] ToolAnnotations
- [x] BaseMetadata

## ✅ Capability Types (All Covered)
- [x] ServerCapabilities
- [x] ClientCapabilities
- [x] RootsCapability
- [x] ResourcesCapability
- [x] PromptsCapability
- [x] EmptyCapability

## ✅ Helper/Utility Types (All Covered)
- [x] Implementation (ServerInfo/ClientInfo)
- [x] RequestId (variant<string, int>)
- [x] ProgressToken (same as RequestId)
- [x] Cursor (string alias)
- [x] Metadata (map<string, MetadataValue>)
- [x] Role (enum)
- [x] LoggingLevel (enum)

## ✅ Schema Types (Handled in Context)
- [x] StringSchema (handled within ElicitRequest)
- [x] NumberSchema (handled within ElicitRequest)
- [x] BooleanSchema (handled within ElicitRequest)
- [x] EnumSchema (handled within ElicitRequest)
- [x] PrimitiveSchemaDefinition (variant, handled within ElicitRequest)

## Summary
**Total Coverage: 100%** 

All MCP types defined in the types.h file have corresponding serialization and deserialization functions. The implementation uses:
- Template functions for common patterns (vectors, optionals)
- Variant pattern matching for discriminated unions
- Proper error handling with JsonException
- Enum string conversions
- Support for nested and complex types