> For the complete documentation index, see [llms.txt](https://docs.thallo.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.thallo.io/registry-integration/challenges.md). # Challenges Integrating two systems in a two-way fashion has a lot of nuanced challenges. You have to consider the data structures of both systems, where the trigger points in each system reside, the state machines of the data structures in both systems, and how these state machines operate with one another and which system is the source of truth for data. But the main challenges lie within the security and data integrity between the two systems. Next we'll explore why this is so important. --- # 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://docs.thallo.io/registry-integration/challenges.md?ask=&goal= ``` `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.