Super cool and well thought out!

I'm working on something similar focused on being able to easily jump between the two (cloud and fully local) using a Bring Your Own [API] Key model – all data/config/settings/prompts are fully stored locally and provider API calls are routed directly (never pass through our servers). Currently using mlc-llm for models & inference fully local in the browser (Qwen3-1.7b has been working great)

[1] https://hypersonic.chat/