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agessaman
2cf65abf62
pushPostToClient sizes the body with strlen(post.text) for the payload and the expected ACK alike. The web API will store "a\0b", and pushing it whole sends text the receiver cannot see -- it stops at the NUL -- while hashing the pending ACK over a span the receiver never reproduces. The push would then never be acknowledged and would retry into the failure backoff. Same defect the core builder had; this is a second, hand-rolled builder. Also proves MC-R4 end to end at last: a genuinely encrypted guest PLAIN through a real registered room identity, watching the injector for an ACK that must not appear. The seam was only covered in three separate halves before -- core honours a veto, _may_ack computes one, a mocked constructor receives one -- none of which would have caught the wiring being dropped.