> Aider fails to implement a significant fraction of the proposed ideas.
Yeah, that can be improved a lot with a better agent for code. While aider is fast and cheap, going with something like plandex or opendavin makes a massive difference... both in quality and cost. For example plandex will burn $1 on a simple script, but I can expect that script to work as requested. A mixed approach could be deepseek coder with an agent - a bit worse quality, but still cheaper to do more iterations.