Under the hood
Useful2 Signal1
Shell snapshot files now include the session id in their name when that id is safe to use.
What's wrong with this entry?
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What
Files written into the shell snapshots directory now have the session id appended to their name, but only when that id passes a strict character and length check; otherwise the filename is unchanged. Message and tool-use ids get the same check before being used in filenames.
Evidence
shell-snapshots
Strings lifted out of the shipped bundle, so the claim above can be checked against them.