Manages the OMP model config (`~/.omp/agent/models.yml`, single source of truth). Context sizes use Ki-style multiples (e.g., 200k = 204800). For `frank-default-small`, update `contextWindow` and `maxTokens` together. Validate with `python3 -c "import yaml..."`. Providers: `llamacpp (dankserver)` & `llamacpp (dankclaw)`. NPU `gemma4-it:e4b` uses port 7771.