This is a real problem, and it’s not just in markdown files and docs. Claude loves to write things we’ve “discovered” in comments and then later in treats the comments as gospel truth.

You have to constantly tend the garden and weed these things out.

Whenever Claude makes some error ask it where and why? And then dig out the weed.

And of course if it’s in the context, probably time for a handover doc (which will need weeding) and started fresh.