My @GithubCopilot experience with #AI coding

I've been using Github Copilot for a few months now and thought I would share some of my experiences with it.  Overall, I would say my experience with Copilot is good, and it's enabled me to do some things that I would have taken much longer to do by myself.  It hasn't stretched beyond my personal reach but would certainly do so for some junior engineers.

1. I have multiple GitHub accounts. I like the fact that I can use my corporate GitHub account to cover my charges on it, even though to do work I am checking in via a different account. 
   
   
2. With respect to Ask vs. Agent modes, I generally like to work in Agent mode unless I want Copilot to just answer a question without making code changes. Ask is show, Agent is do. 
   
   
3. I've experimented with a few agents: 
1. The default, ChatGPT 4.5 is decent, but pretty much at the Junior engineer level. 
   
   
2. ChatGPT Codex Max is more senior, but also very slow. It's like the old fart of the agents. I can't wait areound for Codex Max to get off it's duffer. 
   
   
3. Claude seems to be young, eager and a lot more skilled and detail oriented. I'll probably stick with Claude for a while. 
   
   
4. Claude can stumble down a rat hole and go pretty deep. Cancel intermediate actions or press the stop button if you want to interrupt its thought processes and redirect it. 
   
   
4. The Eclipse (yeah, I'm definitely an Old Fart as far as that goes) GitHub Copilot integration is more limited in what it can do as compared to Copilot in IntelliJ or VS-Code. It may be enough to finally make me make the switch to IntelliJ, but that is several decades of muscle memory I am loathe to give up.
   
   
5. OpenSpec is truly awesome for organizing and documenting work with AI.  So far, I've only used it with Claude, am I'm very happy with the results.  I've used it to add a feature to my CDA to FHIR Parser, and it came up with a very complete set of requirements, design, and implementation plan.  Yes, I DID have to add some detail but not really correct anything.  As an adjunct to AI development, it is very helpful.