What are the set(s) of core-events that are covered by the protocol.

Link to problem area:

Working out the scope of protocol use cases.

For example, what events are required to send a E2EE message between two parties. Similarly for receive.
Or a different one, what is the set of events required to securely CRUD a room with N participants, etc. As well as issue #2124.

Issue

What is wrong?

There is no succinct list/statement of what are the set of core-events in the protocol. But the idea exists with some prominence ("... Matrix specification defines a number of event types which are considered core to the protocol."). It would also be useful in some other contexts (#129, #2124).

How can we improve?

Have a single page listing the set of core-events. Defining the core-event set is aided by a definition of scope. Say, for example, "Events required to pass a E2EE message between two parties.", or some variation on that .

Related:

Issue #129: This is at a higher level than the use case described there. Naturally, the statement/list of the core-events (hyperlinked) would likely have helped that author:

It's also difficult to use the specification as a reference for events because they are distributed across several sections in the document.

Review the protocol event sections referenced by the issue, along with related issues #129 and #2124, to establish the scope of “core-events.” Done means agreeing on a use-case scope and adding a single page that lists the corresponding event set.