Writing about building AI software that holds up in real use.https://mattbilo.com/https://mattbilo.com/blog/make-it-so-it-cant/https://mattbilo.com/blog/make-it-so-it-cant/Telling an AI "never move money" is a wish it can misread, ignore, or be talked out of. Making a money-move fail to compile is a guarantee. The difference between asking for safe behaviour and designing so the unsafe thing can't exist.Sat, 01 Aug 2026 00:00:00 GMTbuilding with AIAI agentssafetyhttps://mattbilo.com/blog/your-demo-never-crashes/https://mattbilo.com/blog/your-demo-never-crashes/A demo is a performance where nothing fails, because in a demo there is no wrong moment. Production is the same feature with one difference: the wrong moment is always available. Two holes I found in my own app, and the tests that catch them.Tue, 28 Jul 2026 00:00:00 GMTbuilding with AIreliabilitytestinghttps://mattbilo.com/blog/the-invisible-debt/https://mattbilo.com/blog/the-invisible-debt/I sat in a meeting about a system my own team built, and I couldn't answer the simple questions. Neither could most of the room. So how does a team work this hard and still not understand its own code?Fri, 24 Jul 2026 00:00:00 GMTbuilding with AIunderstanding