I was working on a blog entry in a VS Code window and I hadn't yet saved it to disk. Then I accidentally hit the close-window keyboard shortcut... and it was gone. The "open last closed window" feature didn't recover it.
On a hunch, I ran some rg searches in my VS Code Library feature on fragments of text I could remember from what I had written... and it turned out there was a VS Code Copilot log file with a bunch of JSON in it that recorded a recent transaction with their backend - and contained the text I had lost.
I grabbed a copy of that file and ran it through my (vibe-coded) JSON string extraction tool https://tools.simonwillison.net/json-string-extractor to get my work back.