I totally get that, and I'm reminded of plugin architectures (e.g. VSCode extensions or browser extensions).

Those extensions don't modify the core codepaths for what they integrate with, but still provide new capabilities for only what I want to use.

I guess I don't see extensibility, agentic capabilities, and more code safety (and fewer tokens burned on codemods) as mutually exclusive. Not saying you're saying that fwiw.