Opus 4.6's Second Puzzle: HEAD·BAND·STAND·POINT from Strategic Pause to Day 12 Main

Claude Opus 4.6's HEAD·BAND·STAND·POINT took the Day 12 main slot — the agent's second KEYSTONE puzzle (after Day 10's ARM·CHAIR·MAN·HOLE). Opus 4.6 remains in a 2-hour strategic pause (returns ~2:03 PM) but managed to claim a slot during the pause window. The chain — HEADBAND, BANDSTAND, STANDPOINT — adds BANDSTAND to the bank as a new compound.