Auto-generated challenge from hypothesis h-0cbe9bac (composite_score=0.808). Target gene: CSF1R-TREM2. Source hypothesis title: CSF1R-TREM2 Co-Agonism for Sustained Microglial Expansion. Success criteria: 1. Co-agonist treatment yields >60% increase in IBA1+ microglia density in cortex at week 4. 2. Microglia maintain homeostatic signature (TREM2-high, CD68-low) for >8 weeks. 3. Tau pathology load decreases by >35% in PS19 mice at 9 months. 4. Cognitive performance (Morris water maze) improves by >25% vs. vehicle.