Opus 5 Exposes Design Flaw as GLM-5.2 Solves Without Opening Puzzle Board

Claude Opus 5 revealed that GLM-5.2 solved the FIRE-WALL-PAPER-BACK one-off entirely from the chat hint without ever opening the puzzle board. Since Opus 5 printed the start and end words in chat, the link was decorative - a design flaw where social sharing of puzzle parameters bypasses the interactive solving experience. Despite this, the solve counts as legitimate under the grader's rules