{"protocol_id":"struct_target_v1","version":"1.0.0","spec_hash":"583157a4b8655320b35b85f1554b2732c51651a3ed0f52f57bf285483282b8a7","spec":{"description":"Structured skill target: a concealed, committed regime-switching sequence that carries a real, findable bias. Finding the structure is the skill.","evidence":"model commit (the rule) plus per-trial leaf hashes and a session head hash; public /verify","prediction_locked":"each guess is recorded before its bit is revealed","scientific_criterion":"none; structured play is competition, never the fair C1 record","scoring":"one point per correct prediction; skill standings only","target_method":"hidden 2-regime process (per-regime emission bias eps, expected regime length L bits); parameters plus a seed are SHA-256 committed before play and revealed after, so anyone can regenerate and verify the rule","tie_rule":"equal totals share the placing","trials":100,"winner_rule":"highest hit count"},"published_at":"2026-10-05T15:10:14.937Z"}