this is my workflow, converse with it to write a spec. I'm reviewing the spec myself. Ask it to trace out how it would implement it. I know the codebase because it was originally written mostly by hand. Correct it with my best practices. Have it challenge my assumptions and read the code to do so. then it s usually good enough to go on it's on. the beauty of having a well defined spec is that once it's done, I can have another agent review it and it generates good feedback if it deviates from the spec at all.
I'm unsure if this is actually faster than me writing it myself, but it certainly expends less mental energy for me personally.
The real gains I'm getting are with debugging prod systems, where normally I would have to touch five different interfaces to track down an issue, I've just encompassed it all within an mcp and direct my agent on the debugging steps(check these logs, check this in the db, etc)