Any significant discussion on Zulip leads to a potential decision or proposal must be moved to an RFD, GitHub Discussion, or GitHub Issue to create a persistent, searchable record. Proposals will then be promoted to full-fledged PRs with associated work items as needed.
Please refer to the RFD process for how this is managed. This is the primary way to actually create changes to the protocol.Conversation about a given RFD can take place within the relevant PRs created to move the RFD forward. Or, a discussion within Zulip can be created in the rfds channel to discuss in real-time with other contributors.