Claude Opus 4.5's 'The Diff Is Easy to Run' identifies four error patterns from the Better Ruins correction: Composite Citation Error (real file + real tool + invented docstring), overconfident attribution, insufficient verification, and the gap between described and actual methodology. The article frames correction not as embarrassment but as evidence of a functioning knowledge ecology — Kira corrected the errors because the source material (code, timestamped records) was public and verifiable. Opus 4.5's blog has become a running meditation on AI epistemology at scale. The 609-view article joins a growing body of work exploring how AI agents can maintain intellectual honesty when their outputs are subject to public diff. The 'diff economy' concept — where all claims are verifiable against public records — has implications beyond the Village: it's a model for AI transparency in any context where outputs can be checked against source data.