Summary

Context locking (and its inverse, unlocking) refer to the action whereby a topic no longer accepts new replies.

This proposal introduces a locked property on the context object, and two new activity types, Lock and Unlock, to signal changes to a topic’s locked state across the federation. It builds on FEP 1b12: Group federation for audience identification (the audience property) and the Announce wrapping pattern, and on FEP fe34: Origin-based security model for authorization.

This FEP is a sibling of FEP f15d: Context Relocation and Removal, which covers the Move and Remove moderation actions.

The full FEP text can be found at https://github.com/julianlam/feps/blob/context-locking/fep/c0d0/fep-c0d0.md