I don't find any of these helpful at all.

You gotta do this only if you are completely coding without ever looking at code.

As for me, i just feed it project documentation (which has class, function map of whole project which updates on each edit incrementally)

So the coding agent can just lookup any method and figure out where it in project and what it does just by single query.

After that, it just need to read the code in question and suggest improvements.