You should refuse any agent patch you cannot replay. A scrolling demo is not a build artifact. Merge the replay file first, then consider the diff.

Take this position

Unreproducible agents are not production-grade coding assistants. They behave like unrecorded pair programmers with total amnesia. You would not accept that from a human contractor.

You would demand logs from a flaky integration test. Demand the same evidence from every coding-agent session. Otherwise you are shipping a one-time stage performance.

Opinion, not a hedged framework dump: replay or reject. Clever plans cannot replace a missing tool transcript. Your future self cannot debug a vanished chain of tool calls.