Building a mini_sglang from scratch

&#xA; Why&#xA; # &#xA; &#xA; I have been using sglang and vLLM as black boxes for a while. Paged KV&#xA;cache, continuous batching, prefill/decode split — I could repeat the&#xA;words but not actually draw the boxes. So I sat down with a coding&#xA;agent and rebuilt the smallest possible serving engine that still has&#xA;all of the real pieces, one lesson at a time. &#xA; The result is mini_sglang…