ChatGPT was able to identify I group I'd read about then couldn't find again:
[quote]"Yes, there is a Siberian Christian sect known as the "Black Sun" or the "Revelationists" who accepts only the Book of Revelation from the New Testament as the authoritative scripture. This group is small and isolated, and their beliefs and practices are not representative of mainstream Christianity. The Book of Revelation is a highly symbolic and apocalyptic text that describes the end of the world, and it is interpreted differently by different Christian denominations. The Black Sun sect takes a literal interpretation of the text and believes that the events described in the Book of Revelation are imminent and will soon come to pass. Their beliefs and practices are considered to be outside of mainstream Christianity, and they have faced opposition and persecution from both the Soviet government and other Christian groups."
Okay, the Marcionites may have a shorter canon: [quote]"The Marcionite sect, founded by the early Christian teacher Marcion of Sinope in the 2nd century, accepted only a truncated version of the Gospel of Luke as their authoritative scripture. Marcion taught that the God of the Old Testament was a cruel and unjust deity, while the God revealed in Jesus was a God of love and compassion. To support this view, Marcion created his own canon of scripture that consisted of a modified version of the Gospel of Luke, minus the references to the Old Testament and the Jewish law, and a selection of Pauline epistles that emphasized the teachings of the Gospel of Jesus.
The Marcionite sect was declared a heresy by the early Christian church, and its teachings were widely rejected. Nevertheless, Marcion had a significant impact on early Christian theology and the development of the canon of the New Testament. His ideas led to the development of the orthodox doctrine of the unity of the Old and New Testaments and the recognition of the authority of the four Gospels (Matthew, Mark, Luke, and John) as the authoritative accounts of the life and teachings of Jesus."
[quote] "The correct information is that the Marcionites had a canon that consisted only of the Gospel of Luke and ten of Paul's letters. The Marcionites rejected the authority of the Old Testament and the majority of the New Testament, including the Gospels of Matthew, Mark, and John, as well as the Acts of the Apostles."
Any nominees for even shorter canons?
P.S. ChatGPT went into a death spiral when I asked it about the interaction between Nestorian Christianity and Buddhism in Western China. I've been more careful what I've asked since then.