README: note Modal usage (Best Use of Modal sponsor prize)

README.md

@@ -43,6 +43,15 @@ B judge panel · 1–5 sparring bots · 7 the Masher · 8 the Executioner ·
 *(This Space is a `gradio.Server` app — Gradio's engine serves the custom canvas at `/`,
 and the `trace_digest` endpoint runs through Gradio's queue, callable with `gradio_client`.)*
 
+## ⚡ Built with Modal
+
+The entire model program ran on **[Modal](https://modal.com)**: all six fine-tune
+generations (TRL behavior-cloning on A100s), every evaluation and the
+classifier-free-guidance sweep, the GGUF conversion (llama.cpp), and the vLLM
+CFG inference gateway. The published fine-tune that ships in this app was trained,
+evaluated, and converted end-to-end on Modal — comfortably inside the $250 credit
+grant. Recipe + reproduce commands: [model card](https://huggingface.co/Jainamshahhh/parry-tactician-1.5b-merged).
+
 ## 🎖️ Badge artifacts (everything is public)
 
 | Badge | Evidence |