Fine-Tuning a 0.6B Model to Run an Agent Entirely in Your Browser
I built a mini agent harness in JavaScript, fine-tuned Qwen3-0.6B on my RTX 3060 to be its brain, and ran the whole thing over WebGPU — no server, no API keys. The model went from 30% to 77.5% on a prior-auth review task. The GPU crashed four times during training and quantization turned out to be the real boss fight.
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