Developing in core files

Hi Everyone- We are new to SuiteCRM (implemented in July 2017). In order to meet our business needs we needed to develop additional items for SuiteCRM. In doing so, we developed/programmed in core files. By doing this, if we were to update, I believe it would cause a mess. When you add custom code, how difficult are updates? How can you develop so that you can develop in Suite, and take advantage of updates?

Any advice or suggestions are appreciated! :slight_smile:

Does this help?

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