Issues

• Empty members in the Accept header cause a 500

  bug
  modelcontextprotocol/ruby-sdk#609 · Filter by author dominikklein opened on Oct 15, 2026

• Error responses carry "id": null, which the MCP schema does not allow

  bug
  modelcontextprotocol/ruby-sdk#606 · Filter by author dominikklein opened on Oct 14, 2026

• String request ids are limited to letters, digits, "_" and "-"

  bug
  modelcontextprotocol/ruby-sdk#603 · Filter by author dominikklein opened on Oct 14, 2026
  

• Methods of undeclared capabilities return -32603 instead of -32601

  bug
  modelcontextprotocol/ruby-sdk#602 · Filter by author dominikklein opened on Oct 14, 2026
  

• Requests with "id": null are run like notifications

  bug
  modelcontextprotocol/ruby-sdk#601 · Filter by author dominikklein opened on Oct 14, 2026
  

• Support modelcontextprotocol/experimental-ext-triggers-events

  enhancement
  modelcontextprotocol/ruby-sdk#594 · Filter by author dwery opened on Oct 11, 2026
  

• SEP-2640: Skills Extension

  enhancement
  modelcontextprotocol/ruby-sdk#568 · Filter by author anirudhmungre opened on Sep 22, 2026
  1

  

• SEP-2663: Tasks Extension

  enhancement
  modelcontextprotocol/ruby-sdk#391 · Filter by author localden opened on Jun 6, 2026