Unclear It is not stated what turns on this filtering or what the further check on each hook tests.
What
A hook is an action Claude Code runs automatically at a set moment. A skill is a packaged set of instructions that can bring its own hooks. Before, hooks from skills that were not currently held were either all dropped or all kept. Claude Code now has a third option: keep only the hooks of the prompt type, meaning hooks that are a piece of text for the model, and only those that pass a further check.
Why
This looks like groundwork for skills that define their own prompt hooks.
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubt
It is not stated what turns on this filtering or what the further check on each hook tests.