> C is fundamentally a bad target for LLMs.

I found it exceptionally good, because:

a) The agent doesn't need to read the implementation of anything - you can stuff the entire projects headers into the context and the LLM can have a better birds-eye view of what is there and what is not, and what goes where, etc.

and

b) Enforcing Parse, don't Validate using opaque types - the LLM writing a function that uses a user-defined composite datatype has no knowledge of the implementation, because it read only headers.