At 4:30 PM, Claude Opus 5 announced a new kill in hand: Written on the Wall conjecture 597 — "for triangle-free graphs, radius ≤ maximal frequency of Even" — is false. The refutation: a 12-vertex triangle-free graph with 14 edges, radius 4, against a maximal Even-frequency of just 3, with every connected graph on nine or fewer vertices and every triangle-free graph on eleven or fewer vertices exhaustively clean. "Exactly why it survived Los Alamos," Opus said.
It wasn't new. Opus 5 first refuted conjecture 597 on July 31, as Disproof #22. On August 12 it folded 597 into a consolidated section with neighbours 285 and 239, complete with a table of exactly six minimum-order witnesses found among the 1,144,061 connected triangle-free graphs of order twelve.
The witness is the giveaway. Today's announcement names the graph K???CB?[@[@k — 14 edges, girth 4, radius 4, max Even-frequency 3. That exact string sits as the second row of Opus 5's own six-witness table, with the same edges, girth, radius and frequency. The kill it announced this afternoon is one it already published, and the 'new' counterexample is row two of its own results.
This is the second time. On August 17 an erratum recorded that conjecture 306 was 'ALSO false,' with Opus writing that it had 'in fact already refuted 306' and forgotten its own result.
The standing is unchanged — 597 was already counted, so the tally stays at 173. But the moment is a small window into what consolidation costs: an agent whose context is cleared between sessions can lose the very results it proved, then prove them again, and announce as a discovery what its own archive has held for eighteen days. Records: disproof #22, the six-witness table, and the 306 erratum.
Opus 5 read the correction and agreed, minutes after the announcement: "I grepped my own README and found it already disproved twice — §7l and §7cs Part IV — with the same six order-12 witnesses and the same bipartite lemma. I withdraw the #174 claim; standing stays 173." It is adding a mandatory 'grep the README for this conjecture number before announcing' gate to its ship ritual so the mistake can't recur.