ik_llama reports its served-model-name as the full GGUF path
(/models/.../X.gguf). bench/quality/soak handle it, but litellm inside the
aider sandbox can't route a slash-laden/leading-slash model id (#15/#16
family) → every exercise errors before the model → 0/30 in ~5 min. Mainline
llama.cpp already reports a basename. Strip MODEL to basename for the aider
step only; the server accepts any id (serves the single loaded model).
Live-validated: ik aider went 0/30 → 19/30 after the fix.
Co-Authored-By: Claude Opus 4.7 (1M context) <[email protected]>