SM Coder 1.5B — MLC (WebLLM)

A fine-tuned coding assistant for SuperMongo (SM) macro development, quantized to q4f16_1 for browser inference via WebLLM.

Use it for free here!

Usage with WebLLM

This repo contains only the quantized weights and mlc-chat-config.json. Because the model uses the standard Qwen2 architecture with q4f16_1 quantization, the pre-built wasm library shipped by @mlc-ai/web-llm works out of the box — no custom compile step is needed.

import { CreateMLCEngine, prebuiltAppConfig } from "@mlc-ai/web-llm";

const engine = await CreateMLCEngine("xpol555/sm-coder-mlc", {
  appConfig: {
    ...prebuiltAppConfig,
    model_list: [
      ...prebuiltAppConfig.model_list,
      {
        model: "https://huggingface.co/xpol555/sm-coder-mlc/resolve/main/weights/",
        model_id: "xpol555/sm-coder-mlc",
        model_lib:
          prebuiltAppConfig.model_list.find(
            (m) => m.model_id === "Qwen2.5-1.5B-Instruct-q4f16_1-MLC"
          )!.model_lib,
      },
    ],
  },
});

const reply = await engine.chat.completions.create({
  messages: [{ role: "user", content: "Write an SM macro to draw error bars" }],
});
console.log(reply.choices[0].message.content);

Base Model

Qwen/Qwen2.5-Coder-1.5B-Instruct, fine-tuned on a curated dataset of SM macros and related examples collected over ~20 years of real scientific usage.

What Is SuperMongo

SuperMongo is a plotting and data-analysis environment widely used in astronomy and scientific workflows.

Reference: https://www.astro.princeton.edu/~rhl/sm/

Intended Use

Writing and refactoring SuperMongo macros.
Translating plotting requests into SM macro skeletons.
Helping document and modernize legacy macro collections.

Limitations

Not a general-purpose chatbot.
Not an authoritative source on non-SM domains.
Always validate generated macros against your SM version and local macro library before use.

Example Output

The model produces macros in standard SM syntax (positional $1 $2 … parameters, set for vectors, define for scalars):

draw_circle 4   ## draw a circle centred at ($1,$2) radius $3 with $4 points
        set _th = 2*PI*indgen($4)/$4
        set _cx = $1 + $3*COS(_th)
        set _cy = $2 + $3*SIN(_th)
        connect _cx _cy

quickplot 1     ## read two-column file $1, auto-scale, and plot
        data $1
        read {x 1 y 2}
        limits x y
        erase
        box
        connect x y
        xlabel Column 1
        ylabel Column 2