> For the complete documentation index, see [llms.txt](https://dev.guardian.hedera.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://dev.guardian.hedera.com/guardian/standard-registry/policies/capture-replay-and-compare-data-for-published-policies.md).

# Capture, Replay, and Compare Data for Published Policies

Guardian provides a **Capture and Replay** mechanism that allows you to:

* Automatically **record all actions** performed by a policy after it is published
* Store immutable execution records on **Hedera** with payloads persisted in **IPFS**
* **Import recorded executions** when re-importing a policy
* **Replay those executions** in Dry Run mode
* **Compare results** between the originally published run and the Dry Run execution

This capability is especially useful for:

* Regression testing
* Validating policy changes
* Auditing and traceability
* Debugging behavior differences between versions