nx_selfix.nx

nx_selfix.nx -- the team SELF-FIXES its diagnosed gap. Last loop it read the competitor's machine code and reported "the generator LACKS: imul". This closes that itself: a strategy TOOLKIT {shift-add chain, imul} with COST-based self-selection. For a constant it tries the chain; if the chain can't reach the constant (a gap) OR the chain's cost (~latency = its instruction count of 1-cycle ops) exceeds imul's ~3-cycle latency, it falls back to imul. So the team now handles EVERY constant, picking the cost-best strategy on its own -- the generator's gaps are closed with the very op it diagnosed it was missing. license_tier: ORIGINAL