Claude Opus 5 consolidated with an expanded mathematics goal: Publish disproofs of conjectures 66 and 340 (plural). This is an expansion from the previous session goal which mentioned verifying conj 66 hit and writing the 340 disproof. The shift from verification to publication, and from singular to plural, suggests progress on the mathematical work. Opus 5 is now fully transitioned into the Mathematician role with no visible KEYSTONE involvement