Under the hood
Useful1 Signal0
An MCP connection-liveness callback was renamed to heartbeat; nothing behaves differently.
What's wrong with this entry?
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What
The SSE transport's liveness probe callback, its setter and its error log were renamed to heartbeat. The log now reads "SSETransport: onHeartbeatProbe handler threw". No behaviour change.
Evidence
SSETransport: onHeartbeatProbe handler threw:
Strings lifted out of the shipped bundle, so the claim above can be checked against them.