New output: docs/img/performance-single-vllm.{png,svg} — just the two
recommended single-3090 vLLM routes (long-vision 198K + long-text 218K).
Designed for the launch tweet so the image scope matches the tweet text
exactly (no dual, no llama.cpp, no Luce).
Also made the substrate footer line conditional on which engines actually
appear in the chart — vLLM-only charts no longer show llama.cpp/Luce
substrate cruft.
Co-Authored-By: Claude Opus 4.7 (1M context) <[email protected]>
