Release History

Unreleased maintenance changes

• Fixed HTTP response leaks and pending-request cleanup after SSE or stdio failures.
• Completed stdio and server-side SSE shutdown lifecycles.
• Corrected notification response behavior and request timeout consistency.
• Isolated feature stores per server and made package scanning tolerate unloadable optional classes.
• Added per-page caches for prompt, resource, and resource-template lists.
• Added string JSON-RPC IDs, strict initialization lifecycle checks, and truthful dynamic capabilities.
• Completed resource templates, completion, resource subscriptions, cancellation, logging, progress, Roots, Sampling, and generic notification callbacks.
• Added opaque-cursor page APIs while retaining the page-number APIs for compatibility.
• Added negotiation for MCP 2024-11-05, 2025-03-26, and 2025-06-18 in one SDK; server version lists are preference ordered.
• Added client and server Streamable HTTP adapters. JSON-RPC batching, removed again in 2025-06-18, is intentionally unsupported.
• Added tool annotations, progress messages, completion-context request models, resource links, structured tool output, and elicitation. Passing completion context into server provider methods remains planned work.
• Ensured parameterless tools always expose a non-null object inputSchema and made every tool parameter require @ToolArg during scanning.
• Scoped tool cancellation by session and request ID; session shutdown now interrupts only its own running tools.
• Added strict initialize field validation and capability checks before server-initiated Roots or Sampling requests.
• Added embedded-resource blob representation and validated Tool, Prompt, and Resource return collections before serialization.
• Converted client-side server-request handler failures into JSON-RPC INTERNAL_ERROR without terminating receive loops.

Streamable HTTP currently supports ordinary JSON POST responses and the optional GET event stream. POST text/event-stream responses are buffered rather than dispatched incrementally. GET-stream readiness is asynchronous, and reconnect/resumption plus full idle-session expiry remain planned work.

aj-mcp-common 1.5 / aj-mcp-client 1.3 / aj-mcp-server 1.2 — 2025-06-10

• Added pagination support.

1.0 — 2025-06-01

• Initial release.