[bgrainger]

Completely agree, and I've started writing more Roslyn analyzers to provide quick feedback to the LLM (assuming you're using it in something like VS Code that exposes the `problems` tool to the model).

I also want C# semantics even more closely integrated with the LLM. I'm imagining a stronger version of Structured Model Outputs that knows all the valid tokens that could be generated following a "." (including instance methods, extension properties, etc.) and prevents invalid code from even being generated in the first place, rather than needing a roundtrip through a Roslyn analyzer or the compiler to feed more text back to the model. (Perhaps there's some leeway to allow calls to not-yet-written methods to be generated.) Or maybe this idea is just a crutch I'm inventing for current frontier models and future models will be smart enough that they don't need it?