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How to explore synthetic agent runs without installing anything with Tracecrate

Open the hosted demo and follow the 30-second walkthrough on synthetic runs.

Who it is forA curious reader or evaluator who wants to see what a trace workbench does before deciding to install it.

The problemIt is hard to judge a trace tool from its description alone.

The outcomeA quick tour of Timeline, Insights, Compare, and export using the two synthetic pagination runs that load automatically.

What you need first

  • Node.js 22.12 or newer (24 recommended) and npm for local use
  • A modern desktop browser with Web Workers support
  • Trace files you are authorized to inspect: Claude Code JSONL, Codex rollout JSONL, OTLP JSON, or TraceCrate native JSON

Steps

  1. Open https://fankchen.github.io/tracecrate/ in a desktop browser.
  2. In Timeline, open a tool event and try a search or a kind filter.
  3. Open Insights, then Compare, and read the recorded differences.
  4. Choose Export report, then Structure only, then Show redacted preview.
  5. Remember that the demo labels baseline and optimized are manufactured, not measured improvements.

Prompt for your agent

Open the hosted TraceCrate demo at https://fankchen.github.io/tracecrate/ and follow its walkthrough on the two synthetic pagination runs. Expected output: a short summary of the Timeline filters, the Compare differences, and the redacted export preview. Verify that the summary does not describe the demo labels as measured results.

Caveat. The hosted demo uses only synthetic data, and a static host still receives ordinary request metadata such as IP address and user agent.

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