Before sending an HTTP hook, Claude Code now compares its own proxy, TLS-trust, and resolver configuration against the person's actual environment, checking a fixed list of relevant variables. If they diverge, the hook is refused rather than sent through a potentially mismatched network path.
HTTP hooks refuse to send when the sandboxed process's network trust settings diverge from the user's own
An HTTP hook is refused if Claude Code's proxy, TLS-trust or resolver settings differ from your own environment.
You'll noticeTier: how much it should matter to you
3Useful: my rating, 1 to 5
3Signal: worth watching, 1 to 5
HooksArea: what it touches
ImprovementsKind: in v2.1.257,
ImprovementsSection of the release