A reminder for people who want to limit their #Meta intake:

#WhatsApp > #Signal (https://signal.org)
#Instagram > #Pixelfed (https://pixelfed.org)
#Threads > #Mastodon (https://joinmastodon.org)
#Facebook > #Friendica (https://friendi.ca), #Hubzilla (https://hubzilla.org)

Existing implementations of Conversation Containers (#Streams and #Hubzilla) add a context property to top-level posts of conversations. This is also what FEP-171b currently prescribes.

However, as I noted in the FEP, this is not consistent with FEP-7888 recommendations.
context property is supposed to be used for grouping objects, and in Conversation Containers we have a collection of conversation activities, not posts.

A property that links top-level post to its conversation container should be called differently. For example, threadContext or conversationContext

Note.threadContext == Add.target.id

context can still be used, but for linking to the collection of posts (although I would prefer to use thread for that purpose).