Deterministic Replay Beats Verbose Logging for Debugging Agents

Verbose logs describe what happened, but deterministic replay lets an engineer re-run the exact decision sequence, which is what actually closes investigations.

Log volume grows faster than log usefulness. When an agent made a bad call, the question is rarely what happened; it is why the state at that moment made the bad call look legal.

What replay gives you that logs cannot

• The exact inputs the agent saw, not a paraphrase of them.
• The ability to test a fix against the original failing sequence.
• A shared artifact the whole team can step through without guessing.

Use the audit schema, architecture guide, and examples to rebuild the exact decision sequence behind a suspicious run.