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fix: a client that leaves the MCP-Protocol-Version label off its requests is served, where Plug refused every call - #347
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cyberpapiii merged 1 commit intoOct 8, 2026
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…ests is served, where Plug refused every call Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
cyberpapiii
enabled auto-merge (squash)
October 8, 2026 13:39
cyberpapiii
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October 8, 2026 13:45
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Grok Bot's calls all failed with
missing MCP-Protocol-Version header. Its client stopped sending the header afterinitialize, and Plug required it on every later request.Plug now serves a request that leaves the header out, on the version the session settled at
initialize. A header that names a version Plug does not serve is still refused.🤖 Generated with Claude Code