How I built a time-travel debugger for LLM agents on Burr, and what "replay the unchanged branch and prove nothing changed" actually takes.
This story is from 2026-10-05. It is preserved in the archive; the latest stories are on the live feed.
Rewind: counterfactual replay for agent pipelines Every agent trace tool I've used has the same ceiling. It shows me a waterfall of steps, I spot that step six produced something stupid, and then I'm stuck. To find out why — or whether it was the model, the retrieval, or the prompt — I have to re-r…
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- 2026-10-05 17:25 · DEV Community — AI
How I built a time-travel debugger for LLM agents on Burr, and what "replay the unchanged branch and prove nothing changed" actually takes.