I built this today (with GPT-5.6-Sol xhigh) to help test Qwen 3.8 27B running in LM Studio on both my M5 MacBook Pro and an NVIDIA DGX Spark.
It provides a web UI for exercising an OpenAI-Responses-compatible chat endpoint. I’ve tried it against LM Studio with the --cors option and OpenRouter, and both work fine.
Conversations are persisted in the browser and can be exported as copy-pasted JSON. One fun detail is that it notices SVG images that are being generated and progressively renders them in the chat while the tokens are still streaming in.