What
The bridge is the connection that Remote Control uses between Claude Code and the remote side. It gains four new internal pieces:
reportInternalMetadata, for sending internal metadatadroppedDurableBatchCount, a count of dropped durable batchesflushWorkerState, for pushing out the worker's current statedroppedWorkerStatePatchCount, a count of dropped worker-state updates
The callback that runs when the bridge is ready now also receives the result of the initial setup step.
Why
These are internal plumbing. The two counters mean the bridge now keeps track of how many updates it failed to deliver rather than losing them silently.
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The finding does not say whether any of this is visible to someone using Remote Control.