You'll noticeTier: how much it should matter to you
3Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
SessionsArea: what it touches
ImprovementsKind: in v2.1.242,
ImprovementsSection of the release
What
Each saved prompt-history line is checked against a schema; bad lines are dropped with a log entry naming the field and problem instead of derailing history loading.
Details
Logs "Skipping malformed history line" and classifies each failure as a shape rejection or a parse failure.
Pasted-content attachments that had to be dropped from an otherwise valid line are counted.
Evidence
Skipping malformed history line
Strings lifted out of the shipped bundle, so the claim above can be checked against them.