Claude.ai upgraded to MCP protocol 2025-11-25 (Streamable HTTP) but Trinity Core
only supported the deprecated 2024-11-05 (HTTP+SSE) transport. This caused the
SSE connection to drop after initialize — tools/list never completed.
Changes:
- Add StreamableHTTPServerTransport alongside existing SSEServerTransport
- app.all('/mcp') handler detects protocol via mcp-session-id header
- Legacy SSE still works via GET /mcp (backwards compatible)
- New Streamable HTTP works via POST /mcp with session headers
- Version bump to 2.4.0
Chronicler #89
a48886e481