My coding agent keeps memory in flat markdown files. One fact per file, a frontmatter header, an index that loads at the start of every session. Ninety files, two weeks old, twenty five sessions.
Every one of those files makes claims about my machine. This path holds that project. This command exists. This credential lives under that id. Claims decay, and nothing in the format tells you when one goes bad. So I wrote a script to walk the memory and check each claim against the machine as it is right now.
The first run told me 45 of 90 files were rotten. Fifty percent.
That number was wrong, and the way it was wrong turned out to be the interesting part.
What is actually checkable
