> For the complete documentation index, see [llms.txt](https://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://guardian.hedera.com/docs/3.5.1/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


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://guardian.hedera.com/docs/3.5.1/guardian/standard-registry/policies/capture-replay-and-compare-data-for-published-policies.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.