Under the hood
Useful2 Signal2
Hooks now get an explicit session with id, working directory and project root instead of guessing from globals.
What's wrong with this entry?
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What
Hook entry points now receive an explicit session built from the session id, original working directory and project root, rather than reading ambient state. Covers ConfigChange, FileChanged, CwdChanged, Notification, DirectoryAdded, SessionEnd, StopFailure, WorktreeCreate and Remove, PreCompact and PostCompact, and Elicitation.
Evidence
hook_event_name: "CwdChanged"
Strings lifted out of the shipped bundle, so the claim above can be checked against them.