DocTunnel: an AI agent builds a file transfer service from an empty folder

DocTunnel is your own file transfer service: drop files on a page, share a long link, and everything disappears after the days you choose. No accounts, no subscription, one program on your own server, up to 1 GB. It was conceived and written entirely by autonomous AI agents. This video shows the real build: the brief, the time-stamped terminal, the tests that go from red to green, the compiler errors and the fixes, the measurements and the cost. And what it means for working with AI agents: who decides, what can go wrong, and what it costs. Chapters 0:00 Intro 0:38 The problem 1:16 What DocTunnel does 1:49 Demo in the browser, up to 1 GB 2:44 Safe, in plain words 3:19 What it takes to run 3:55 How it was made 4:30 Part 2: the build, step by step 5:09 The brief 5:34 Round 1: reading first 6:00 The test, red first 6:25 Building, compiling, green 6:54 Where the time went 7:50 The heart of the program 8:34 Round 2: four extensions 9:35 The first compiler error 10:32 The password: key derivation 11:05 Admin link and download counter 11:48 The page, and the second compiler error 13:10 Afterwards: one gigabyte, streamed 13:53 What this build does not prove 14:23 The cost of the build 14:43 Part 3: working with AI agents 15:11 The brief is a working agreement 15:43 Boundaries, set up front 16:38 The loop 17:09 Where the human decides 17:44 What can go wrong 18:20 From one agent to an organisation 18:44 The same approach, other programs 19:21 Summary 20:01 Appendix: round 1, uncut 23:31 Appendix: round 2, uncut 30:54 Thanks for watching Books, Expert Days and more: https://florisknol.com