What
The background step that re-appends session metadata now checks, after its await, whether the session file or session id changed while it was waiting, and bails out if so. Without that check a session switch mid-write could land metadata in the transcript you moved to.
Details
- The guard is opt-in through a new parameter on the re-append call, so existing callers choose whether the check applies.
- The configuration cache now emits an
installedevent when a config is installed or written through, so other code can observe disk reads and writes.
Evidence
reAppendSessionMetadataAsync
Strings lifted out of the shipped bundle, so the claim above can be checked against them.