[thedavidprice]

I (we) have seen these pieces before: replay, time-travel debugging, tracing, APM, event sourcing, etc. What I haven’t seen is the whole thing work as described in a production setting. I.e. capture enough of a production run that you can replay it locally, get the same inputs/results, and then trace a bad value back to where it came from.

Has anyone seen prior tech that got this whole combination viably working? Or is there true (potential) novelty here in the combination of production replay + value provenance + usable workflow?