What the reviewer found
PreToolUse on Bash|PowerShell runs the headroom CLI's own subcommand 'headroom init hook ensure'; the CLI is a separately installed binary whose code is not in the packet, so what 'ensure' checks or changes is unreviewed. It runs on every shell tool call with a 15 second timeout and could block them.
unreviewed-script— runs a script that could not be readbroad-matcher— intercepts every tool call
What was read
The file as it ships in headroomlabs-ai/headroom:
plugins/headroom-agent-hooks/hooks/hooks.json
What the static scan said
The 26-rule scan found nothing in this file; the review read it anyway.
How this review was made
Fable 5.1 read the files above on 7 September 2026 and answered three questions: is it dangerous to whoever installs it, is each scanner finding real, and what should the installer know. The verdict is bound to the file's hash; when the file changes, it is scanned afresh and reviewed again. A script that changes while the definition does not is not re-reviewed — that is a known gap. How the scan and the review work.