Derives the named SubHandle under the given Handle.
Silent-failure contract (R7): on derivation failure the hook logs
via console.error and keeps returning null — there is no thrown or
returned error signal. The structured { handle, error } shape is
a post-freeze v1.1 candidate (BL-50).
Derives the named SubHandle under the given Handle.
Silent-failure contract (R7): on derivation failure the hook logs via console.error and keeps returning null — there is no thrown or returned error signal. The structured
{ handle, error }shape is a post-freeze v1.1 candidate (BL-50).