That's the thing though - they're using logs. My theory is that LLMs are intrinsically quite good at that because they're good at sifting text.

Getting then to drive something like a debugger interface seems harder from my experience (although the ChatDBG people showed some success - my experiments did too, but it took the tweaks I described).

My experiments are with Claude Opus 4, in Claude Code, primarily.

Look also at Delta Debugging which didn't need an LLM.