I was under the impression Aider did exactly what you're describing using it's repo map feature.
Not really, repo map only gives LLMs an overview of the codebase, but aider doesn't automatically bring files into the context - you have to explicitly add the files you wish for it to see in their entirety to the context. Claude Code/Codex and most other tools do this automatically, that's why they're much more autonomous.
Aider regularly asks me the authorization to access files that I didn't explicitly add.