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Changelog

v0.4.0

  • Breaking pre-1.0 namespace change: moved shared JSON-RPC/core APIs to Voltaic.Core and MCP APIs to Voltaic.Mcp
  • Added Voltaic.A2A for A2A v1.0 Agent Card models, task/message/artifact models, security declarations, push notification config models, and protocol errors
  • Added dependency-light A2AClient for JSON-RPC over HTTP with A2A-Version: 1.0 and SSE streaming support
  • Added dependency-light A2AHttpJsonClient for the A2A HTTP+JSON binding without depending on ASP.NET Core or System.Net.ServerSentEvents
  • Added dependency-light A2AGrpcClient and Watson-backed A2AGrpcServer for A2A gRPC over HTTP/2 without ASP.NET Core
  • Added A2ACardResolver for /.well-known/agent-card.json discovery
  • Added A2AHttpServer on HttpListener with public and extended Agent Cards, JSON-RPC, HTTP+JSON REST routes, SSE streaming, task projection, in-memory task storage, live task subscriptions, CORS, optional auth, push notification config storage, and return-immediately handling
  • Added IA2AAgentHandler, A2AAgentEventQueue, A2ATaskUpdater, IA2ATaskStore, and InMemoryA2ATaskStore for direct-style agent implementation
  • Added official a2a-dotnet compatibility coverage based on inspected source commit 8fe65cfaa65a72b2d63bc9bef2e2d32fddc12a18, including JSON-RPC method/envelope/header checks, HTTP+JSON route/body checks, official-style server request acceptance, and SSE parsing
  • Added A2A Touchstone suites covering serialization, Agent Card discovery, JSON-RPC, HTTP+JSON, gRPC, streaming, task lifecycle, push notification config CRUD, extended Agent Cards, return-immediately behavior, and compatibility oracle checks
  • Added Sample.A2AServer, Test.A2AServer, and Test.A2AClient
  • Reorganized library source under src/Voltaic/Core, src/Voltaic/Mcp, and src/Voltaic/A2A, including A2A protobuf definitions under src/Voltaic/A2A/Protos
  • Updated README, package metadata, API coverage documentation, and source-layout tests for the new namespace layout and A2A support

v0.3.0

  • Updated package version and MCP default protocol version to 2025-11-25, while retaining 2025-03-26 negotiation support
  • Added shared MCP endpoint infrastructure for tools, resources, prompts, capability reporting, pagination, and protocol validation errors
  • Expanded ToolDefinition metadata and added McpToolCallResult support for structured content and full tool-call result returns
  • Added resource models and server registration APIs for static resources, resource templates, resources/list, resources/templates/list, and resources/read
  • Added prompt models and server registration APIs for prompts/list, prompts/get, and required prompt argument validation
  • Added completion provider APIs and completion/complete handling for prompt and resource completions
  • Added MCP utility models and handlers for logging/setLevel, notifications/cancelled, notifications/progress, and notifications/message
  • Added lightweight JSON Schema validation for common tool input and structured-output schema cases
  • Tightened Streamable HTTP behavior for required Accept headers, MCP-Protocol-Version, notification 202 Accepted responses, and terminated-session 404 responses
  • Added MCP resource/prompt/tool notification helpers for HTTP, TCP, and WebSocket transports where server-to-client notifications are available
  • Added Touchstone-based shared test descriptors plus console, xUnit, and NUnit runners under src/
  • Expanded Test.Shared into a 253-case matrix covering public API validation, JSON-RPC TCP integration, Streamable HTTP behavior, MCP registry operations, model serialization, framing edge cases, client connection lifecycle, auth/CORS/session behavior, stdio subprocess integration, and TCP/WebSocket MCP parity
  • Added protocol-level HTTP tests covering initialize, unsupported versions, tools, resources, templates, prompts, SSE notification delivery, and JSON result export
  • Updated Sample.McpServer and README with structured-output, resource, template, prompt, Streamable HTTP, authentication, and Touchstone testing examples

v0.2.0

  • Fixed Streamable HTTP /mcp and legacy /events SSE connections so they emit an immediate : connected prelude and flush as soon as the stream is established
  • Fixed idle SSE heartbeat behavior by restoring keep-alive comments (: keep-alive) when no notifications are queued
  • Added raw HttpClient regression tests that verify immediate SSE liveness and keep-alive delivery on the wire
  • Breaking change: ClientConnection.DequeueAsync(CancellationToken) now throws OperationCanceledException when cancelled instead of returning null
  • Clarified Streamable HTTP client usage and endpoint documentation in the README

v0.1.11

  • Fixed IDisposable implementation across all 9 disposable classes to follow the full Dispose pattern
  • All classes now implement protected virtual void Dispose(bool disposing) with GC.SuppressFinalize(this)
  • Added _IsDisposed guard flags to prevent double-disposal in all classes
  • Fixed double-disposal bugs in JsonRpcClient, McpClient, and McpWebsocketsClient where Disconnect()/Shutdown() previously disposed resources that Dispose() also disposed
  • Fixed listener disposal in JsonRpcServer, McpHttpServer, and McpWebsocketsServer; now calls Dispose() instead of Close()/Stop()
  • Fixed TcpClient?.Close() to TcpClient?.Dispose() in ClientConnection
  • Removed resource disposal from Disconnect()/Shutdown() methods to prevent double-disposal; these methods now only manage connection state

v0.1.10

  • Added AuthenticationHandler property to McpHttpServer for optional async request authentication
  • Added AuthenticationResult class with IsAuthenticated, Principal, Claims, StatusCode, and ErrorMessage properties
  • Health check (/) and ping JSON-RPC method bypass authentication to allow connectivity validation without credentials
  • CORS preflight (OPTIONS) requests bypass authentication
  • When AuthenticationHandler is not set, behavior is unchanged from previous versions

v0.1.x

  • Initial release

Previous Versions

Notes from previous versions will be pasted here.