Add the ability to use custom LiveError component.

[laureano-arcanio]

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Feature Request

Hi there!

I'm working on a generative UI concept powered by an LLM-based code generator, where the UI components are dynamically generated through LLM outputs.

Since the code is AI-generated, it occasionally contains errors or incomplete implementations. I'd like to integrate a custom LiveError component that can handle these errors gracefully and trigger logic to automatically re-fetch or regenerate the component code when an error occurs.

I believe this would improve the resilience of the live editing experience in LLM-driven workflows.

Would you be open to adding support for this feature? I'd be happy to contribute with a PR if you're on board!

Thanks so much for your work!

[laureano-arcanio]

Not sure this is a workaround or your intention, but for now I'm importing LiveContext and creating a component myself. Probably good to document or change to recieve callbacks onError and/or children ? Thanks