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Diff Every Tool Call: Replaying Agent Runs from a JSONL Trace

Production failed on Friday. My final transcript looked clean. The agent answered, cited sources, and summarized. The raw trace told a different story. It called the same endpoint three times with stale arguments.
Re-running the agent wasted tokens and time. Replaying the trace took seconds. I built

Key takeaways:

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Read the full article: https://ainexusdaily.vercel.app/article/2026-08-31-diff-every-tool-call-replaying-agent-runs-from-a-jsonl-trace


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