If you're vibe coding, I highly recommend TDD. It makes it very easy for a coding agent to iterate on it. You gotta bonk it sometimes when it tries to delete a problematic test etc, but hallucinating a test suite along with your app really helps a lot. (I've been vibe coding a scripting language/compiler for a video game project I'm working on in this way, and it's been fascinating and mostly great.)

▲

Havoc 16 hours ago | parent [-]

Do you write the test yourself or get the agent to do it?

▲

hu3 14 hours ago | parent | next [-]

No OP but I also guide LLMs with TDD and it's a mixture of LLMs write tests for happy paths and I write tests for edge cases.

Also when I use LLM to fix a bug, I tell it to write a test to prevent regression of the bug at the end of the session, after the bug is fixed.

	▲	Havoc 10 hours ago \| parent \| next [-]
		> Also when I use LLM to fix a bug, I tell it to write a test to prevent regression of the bug at the end of the session, after the bug is fixed. Oh that’s clever. Thanks
	▲	wilg 13 hours ago \| parent \| prev [-]
		I try to get the agent to create a failing test first, so we can verify its fix is real.

▲

wilg 13 hours ago | parent | prev [-]

I get the agent to do it generally. (I realize this seems incestuous, but its fairly easy to validate the tests are sensible as you add features, because the biggest risk is regressions as the AI does something dumb later.)