What's a good wiki system for personal notes?

I am looking for a simple flat-file system with markdown formatting.
A static website generator like Pelican (local only) seems good enough, but it may be limited for a wiki.

Update:

I'll stick to #Pelican and activate the Markdown extension "Wikilinks" (like [[link name]]), and it's pretty much sufficient.

https://docs.getpelican.com

Other more qualified apps would be #Joplin, #Turtl, #Zettlr, #Obsidian.

Pelican 4.11.0

Pelican is a static site generator, written in Python. Highlights include: Write your content directly with your editor of choice in reStructuredText or Markdown formats, Includes a simple CLI tool...

PELICAN