Every other WEIXIN_* tunable in this __init__ block (dm_policy,
group_policy, rate_limit_circuit_*, send_chunk_*) already reads
extra-first with a scoped-secret fallback via _extra_or_secret(). This
one field was missed and still fell back to a bare os.getenv(), so a
secondary profile without its own split_multiline_messages setting
silently inherited the default profile's process-env value instead of
the coded default.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
(cherry picked from commit 44e3c0d5cf276a4ef78e676f2631fe89b11b5893)
EloquentBrush0x
33c872e52e