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bbassieandClaude Opus 5.5
235a15b9cc
Every message sent over a link is kept in the send buffer until the other side acknowledges it with a heartbeat, so it can be resent if the session resumes. Nothing forced a peer to acknowledge, so a client that kept heartbeating without a sequence number while subscribed to a busy event made the controller buffer messages until it ran out of memory. Store buffered messages serialised, track their total size, and close the connection once it goes over maxSendBufferSize. The controller sets this to 64 MiB for the connections it accepts. A client that far behind could not resume in a reasonable time anyway. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>