The jcode journal reader, the Claude transcript reader and the Command Code
transcript reader each carried their own copy of the same reverse chunked line
scan; they now share one tested helper. jcode's managed hook script drops its
hand-rolled curl for buildPosixAgentHookPostCommand, which also gains it the
raw-JSON transport and the --noproxy guard the bespoke copy was missing.
Co-authored-by: czzczz <chanzrz_zbf@foxmail.com>