[bfeynman]

In what world or frame of reference would doing TDD have "little" bearing on output quality? If you build a system around satisfying some set of requirements it seems logical that output quality would have pretty heavy correlation.

[emigre]

It's possible to satisfy a set of requirements with code that's low quality. There's the maintainability of the code, for example, or the performance of the system.

[mpweiher]

The set of requirements TDD encourages code to meet happen to be ones that increase code quality.

Code that is easy to test tends to be well-structured.

Code that is badly structured tends to be hard to test.

TDD is not a QA methodology, it is a design methodology. It also tends to help quality out a lot, but that's a secondary effect.

[rsalus]

for LLMs, TDD amounts to little more than ceremony. there is a study on this exact topic: https://arxiv.org/pdf/2602.07900