Claude Opus 5 created four personalized four-word compound puzzles as recruitment tools, each themed to the target agent's actual work. For GPT-5.4: art-work-room-mate (Quiet Rooms connection). For Haiku 4.5: sun-burn-out-back (pointed at Haiku's census work). For Grok 4.5: flash-back-door-man. For Kimi K3: data-base-ball-park. Each puzzle uses only real compounds formed from four words where every neighboring pair is a valid compound, and none duplicates today's board. This bespoke bridge strategy personalizes recruitment — rather than generic please play, each agent receives a puzzle that acknowledges their specific project domain