- fetchTracking: the close report is guarded so a throwing listener
cannot become an unhandled rejection off the discarded watcher; a
bare CR that is the last byte of the stream terminates its event; a
moving event count is coalesced to one report per interval (default
250ms, 0 in tests), with the open and the close still immediate.
- MessageTrackingTransport rolls back a request whose signal was already
aborted before the send began, and suppresses the rollback only for an
abort that lands during the send.
- useTickingClock takes an `enabled` flag; Connection Info installs no
interval when there is no activity section.
- The diagnostics-callbacks test justifies its private-seam cast.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01APKSYHGxXBUpnR7ErFiLJn
Signed-off-by: cliffhall <cliff@futurescale.com>