You'll noticeTier: how much it should matter to you
1Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
HooksArea: what it touches
ImprovementsKind: in v2.1.317,
ImprovementsSection of the release
What
A hook is an action you set up to run automatically at a certain point in a session. When Claude Code blocks a hook, it explains why. It now has three more reasons, each for a script it cannot check on your machine:
The script may run through csh or tcsh, two older shells.
The script is a makefile.
The script is an awk script, and what awk would run from it cannot be checked.
Why
Hooks of these kinds are refused with a clear reason, so you know what to change instead of guessing why the hook did not run.
