fix(streamable-http): prevent SSE reconnect loops with shadow channels#660

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its-mash wants to merge 7 commits intomodelcontextprotocol:mainfrom

mcpmux:fix/sse-channel-replacement-conflict

Commits on Feb 14, 2026

fix(streamable-http): return 409 Conflict when standalone SSE stream already active

its-mash
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claude
committed
fix(streamable-http): handle resume with completed request-wise channel

its-mash
and
claude
committed
fix: allow SSE channel replacement instead of 409 Conflict

its-mash
and
claude
committed
fix: skip cache replay when replacing active SSE stream

its-mash
and
claude
committed
fix: use shadow channels to prevent SSE reconnect loops
its-mash
committed
test: comprehensive shadow channel tests (15 cases)

its-mash
and
claude
committed
fix: use correct HTTP status codes for session errors per MCP spec

its-mash
and
claude
committed