The AT Protocol's official documentation repository, atproto-website, recently removed references to "NIST K-256". A commit on August 29, 2025, with the message "remove "NIST K-256"" suggests a change in the underlying cryptographic standards of the protocol. This likely refers to the NIST P-256 elliptic curve, a standard for digital signatures. The removal could indicate a shift towards other cryptographic curves, potentially for reasons of security, efficiency, or to avoid standards with perceived government influence. This is a significant technical change that developers building on the AT Protocol should be aware of.