nx_game_depth_gate.nx

nx_game_depth_gate.nx -- proves nx_game_depth is a real depth instrument. A SHALLOW outcome table (every strategy wins the same) must score SHALLOW; a DEEP table (strategies diverge, one loses) must score DEEP. The honest audit: the current click-to-sell Frontier funnels every strategy to the same win = SHALLOW by this critic. Mutation: collapse the deep table to all-win-same and it must fall back to SHALLOW. license_tier: ORIGINAL expect_exit: 0