engine_overrides give nodes picked by GPU class, id or labels their own engine versions; node add --disable-engine keeps one off a node; what vLLM cannot do on a node is a warning rather than a refused node; the CUDA requirement follows the version; a hand-named binary is no longer replaced by an installed one. Refs #2 (items 4 and 7). Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>