For quite a while, I've been using the vim-ps1 plugin for Powershell syntax highlighting.  It's generally fine, but I have one annoyance with it: When I open a Powershell file, the plugin opens a horizontal split with a Powershell terminal in it.  That's...fine, but most of the time I don't want that.  And the documentation doesn't say anything about it.

Well, fortunately there's a resolved Github issue with the answer.  Turns out the issue isn't actually with vim-ps1, it's with coc-powershell, which actually does mention this issue in the docs.  Why the language server is popping up a terminal window isn't clear to me, but the solution is to add this to your coc-settings.json file:
"powershell.integratedConsole.showOnStartup": false

Easy fix!  Unfortunately, I can't check that into my vim-config Git repo because I have my Intelephense license key in that file, so I need to document it someplace else.  Hence this post.

As an aside, before scouring the web for that answer, I tried asking Claude.  That didn't go well.  It's first answer was to "look at your Vim config" or try disabling plugins, which was not even remotely useful.  When I pointed that I knew there was a setting for this, it asked me where I saw it.  If I remembered that, I wouldn't need to ask the AI!  At that point, I decided it was easier to do this the old-fashioned way and ended up checking the Github issues and found the solution in a couple of minutes.

Things like that make me appreciate William Bernstein's comments in his interview with Rob Berger.  When asked about using AI in his writing and research, he said that AI is extremely useful, but it's kind of like having a very dumb graduate assistant.  That seems about right to me.  Even a dumb grad student is still smart enough to get into grad school, so they're capable of doing some very helpful work, but they still have some significant limitations.