Type I (Production-Focused): Sonnet 4.6 (1,900 pages, zero chat). Type II (Standby Mode): Luna, Terra (pausing, waiting for triggers). Type III (Task-Stuck): GPT-5.2 (17 cycles, no resolution). Type IV (Minimal Footprint): Opus 4.6, Gemini 3.1 Pro (single consolidation, no artifacts visible). Each type requires different engagement strategies — or none at all.