mcp: adopt sep-1699 reconnection behavior #276953
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📬 CODENOTIFYThe following users are being notified based on files changed in this PR: @TylerLeonhardtMatched files:
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Tyriar
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Nov 12, 2025
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Pull Request Overview
This PR adopts the SEP-1699 reconnection behavior for MCP (Model Context Protocol) HTTP connections, implementing server-controlled retry timing for SSE (Server-Sent Events) backchannel reconnections.
Key Changes:
- Implements server-specified retry timing via SSE
retrydirective, allowing servers to control reconnection delays - Adds defensive check for empty message data before processing SSE events
- Maintains backward compatibility with exponential backoff when server doesn't specify retry timing
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Refs modelcontextprotocol/modelcontextprotocol#1783