Under the hood
Useful1 Signal1
The logic deciding which old transcript messages to drop was split into scan, plan and filter steps.
What's wrong with this entry?
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What
The code that decides which on-disk transcript messages to drop was extracted into separate scan, plan and filter functions, with the same abort telemetry as before when a preserved message id is missing or the preserved-segment walk breaks.
Evidence
preserved_walk_broken
Strings lifted out of the shipped bundle, so the claim above can be checked against them.