ActivityPub/Primer

This is a primer for implementation of ActivityPub.

Basic concepts

• ActivityPub/Primer/Namespace
• ActivityPub/Primer/Object identifiers

Properties

• ActivityPub/Primer/Required properties
• ActivityPub/Primer/Cardinality of properties
• ActivityPub/Primer/Streams
• ActivityPub/Primer/Server-Managed Collections

Client to Server API

• ActivityPub/Primer/API
• ActivityPub/Primer/Outbox
• ActivityPub/Primer/Copying addresses between Activity and object
• ActivityPub/Primer/proxyUrl endpoint
• ActivityPub/Primer/Tracking read status of objects

Server to Server Protocol

• ActivityPub/Primer/Inbox forwarding

Handling activities

• ActivityPub/Primer/Referring to activities
• ActivityPub/Primer/Out-of-order activities

Activity types

• ActivityPub/Primer/Delete activity
• ActivityPub/Primer/Follow activity
• ActivityPub/Primer/Accept activity
• ActivityPub/Primer/Announce activity
• ActivityPub/Primer/Reject activity
• ActivityPub/Primer/Like activity
• ActivityPub/Primer/Add activity
• ActivityPub/Primer/Remove activity

Handling posts

• ActivityPub/Primer/Addressing
• ActivityPub/Primer/HTML

Handling conversations

• ActivityPub/Primer/Threading
• ActivityPub/Primer/Replies
• ActivityPub/Primer/Context

Other specifications

• ActivityPub/Primer/Caching
• ActivityPub/Primer/HTTP status codes for delivery
• ActivityPub/Primer/Authentication Authorization
• ActivityPub/Primer/Testing

Abuse considerations

• ActivityPub/Primer/Detecting and Reporting CSAM