27 small things that run in a browser tab. No install, no account, no build step. Open one and it runs. Next to each one is a write-up of how it was made, and the write-ups are the point: the section that matters is usually "the place it goes wrong", because that is the part nobody warns you about. 23 of them we wrote by hand. 4 were built by describing them in plain words, and for those we kept the actual transcripts — dead ends included. We keep the two lists separate.