You'll noticeTier: how much it should matter to you
3Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
HooksArea: what it touches
ImprovementsKind: in v2.1.248,
ImprovementsSection of the release
What
Hook configuration validation now checks each matcher with rules specific to the event it is attached to, and the resulting error names that event instead of failing generically.
Details
Event rules live in a lookup table keyed by event name; a tool.call entry is read from it.
Evidence
SITE_RULES
Strings lifted out of the shipped bundle, so the claim above can be checked against them.