Comment by atsbbg
What are the limits on Retroaction? Can Retroactive changes revise history?
For example, if I change the code / transactions in a step, how do you reconcile what state to prepare for which transactions. For example, you'll need to reconcile deleted and duplicated calls to the DB?
Generally we recommend against retroaction--the assumed model is that every workflow finishes on the code version it started. This is managed automatically in our hosted version (DBOS Cloud) and there's an API for self-hosting: https://docs.dbos.dev/typescript/tutorials/development/self-...
That said, we know sometimes you have to do surgery on a long-running workflow, and we're looking at adding better tooling for it. It's completely doable because all the state is stored in Postgres tables (https://docs.dbos.dev/explanations/system-tables).