The one where I spent a weekend losing an argument with an AI agent, and what autism has to do with it.

The one where an unplanned side effect turns out to be the whole point.

The one where four is the magic number for tolerating duplicated test setup.

The one where production data tells you what your fixture personas should be.

The one where fixture files start reading like the setup chapter of a novel.

The one where UX design from 1999 solves the fixture archetype problem.

The one where I do the math on why you can't create a fixture for every possible state.