Activity

A feed record capturing that a member performed a verb on an object. Activity is append-only and drives the public social feed.

Structure:

• actor_identity_user_id — who did the action
• verb — what they did (created, replied, rsvped)
• object_type — what kind of thing they acted on (conversation, community, event, message, profile)
• object_id — which specific object
• visibility — public / circle / private

Allowed:

• activity feed
• activity record
• activity verb

Forbidden:

• post (a post implies authored content; activity records are derivative of actions, not primary content)
• event (ambiguous with social event; activity records are not events)
• log (implies system/infrastructure logging; activity is a product-facing feed)
• presence (distinct; see: presence)

Notes:

• Activity is written automatically by the social service when members perform actions. Members do not directly create activity records.
• The visibility enum uses circle (not followers). The followers value was removed in migration 004.
• verb values should be past-tense action words: created, replied, rsvped. Do not use gerunds (creating, replying).

Related:

• presence (distinct real-time signal; see: presence)
• notification (activity can trigger notifications)
• visibility