When did you create that workflow? I ask because I used to have something with a lot of carefully designed stuff like that back in Spring, but as the Summer progressed I found that getting out of the agent's way more and more has worked really well. I've been coding for 17 years, so this year has been a real journey as I've let go of some of the control of "this is how each step must be done". Those years of experience do mean that problems jump out pretty readily after the fact and and once you point out the problems to the agent it's pretty good at correcting them.
Today, I generally spend a few hours on a spec, let the agent run for 4 to 6 hours and I'm 90% there, with maybe a couple of days of tweaks, then a couple of days of iterations coming from user feedback after that. I've stopped using skills almost entirely now, mainly using them just to keep discovery of MCP or API docs out of context until needed. I have a few bullet points on testing and style in AGENTS.md, but I'm pretty sure it would probably run pretty close to what I'm looking for even without those these days.