I'm also in the boat that says things should be better, but instead of improving the agent I decided to try to implement the agent management (in: https://beolis.com).

It still leverages agents (people are used to them already) but can deal with executing it on a different vm, dealing with git worktrees, etc (not that coding agents themselves cannot be improved, but I think the sw development infrastructure around it has a lot to improve too).

All fair, but just to note on the "who doesn't like 10% free performance", that bug has the following note:

CORRECTION NOTICE: We've since found a compiler bug in LLVM 19 that artificially boosted the new interpreter's numbers. The numbers are closer to geomean 3-5% speedup. I apologize for reporting incorrect figures previously due to the compiler bug.

I'm working on a tool to manage developing with Agents for teams, using a UI like a Kanban board and workflows, so the development starts from a given workflow and not from a prompt, the idea being that instead of starting from a prompt/talk with the agent you define the ticket, create a plan, review and then have workflows that cover the implementation -- I find that I have better results than trying to do a chat with the agent for implementing.

I've been full time on it for 4 months already and dogfooding: https://beolis.com -- starting to look for feedback, although I would say it's not where I want to be yet, but getting there.