What you're missing is how to use the tools properly. With solid documentation, good project management practices, a well-organized code structure and tests, any junior engineer should be able to read up on your codebase, write linted code following your codebase style, verify it via tests and write you a report of what was done, challenges faced etc. State of the art coding agents will do that at superhuman speeds.

If you haven't set things up properly (important info lives only in people’s heads / meetings, tasks dont have clear acceptance criteria, ...) then you aren't ready for Junior Developers yet. You need to wait until your Coding Agents are at Senior level.