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Starting in March 2023, Slack began rolling out a new collection of features collectively called Save it for Later. It gives you a new Later section on Slack where things you save for later (with or without a reminder attached to it) are kept.
This new collection of features replaces our previous Saved Items (also known as starred items, or just stars) and Reminders features.
As part of this new feature roll out, the existing APIs to interface with saved items and reminders have become degraded or useless. There are no direct APIs for Save it for Later to integrate with. With the current suite of built-in functions, web API methods, events, and triggers offered by Slack it is possible to recreate some (but certainly not all) use cases the impacted APIs supported.
We aim to give ample notice for every platform feature developers would consider a “breaking change.” We apologize we were unable to provide this information to developers ahead of the Save it for Later release.
Save it for Later began gradually rolling out to users in March 2023. Everyone has it now. Expect the APIs mentioned above to be marked deprecated and set for retirement in September 2023.