Body Required

• id string(uuid) Required

  Unique id for this event. Stable across redeliveries, so it is the dedupe key. Assigned when the state change is recorded rather than when the message is dispatched.

• type string Required

  The topic name, identical to the channel address. Route on this.

  Value is article.liked.

• api_version string Required

  The Commune-Version value this payload conforms to. Present on the message itself, not only on the request header, so an event persisted to a consumer's own store stays self-describing.

• occurred_at string(date-time) Required

  RFC 3339 timestamp of the state change, not of the delivery attempt. Use it to order events, since delivery order is not guaranteed.

• newsletter_id string(uuid) | null Required

  The newsletter the change belongs to. This is the tenant boundary: a consumer only ever receives events for newsletters its credential can read. Null only for events that are genuinely not newsletter-scoped, which none of the topics Commune publishes currently are.

• actor object | null Required

  Who caused the change, and null when nobody outside Commune did.

  Populated on a change made through this API's write operations, and null on every other change: an edit a creator made in the product, an import arriving from a provider, a scheduled job, a delivery result reported by the sending provider. Null is therefore the common case and stays a legitimate value. Read it as "this change came in through the API under this credential", never as "nothing caused this".

  It never names a person, only the credential.

  It answers "did this change come in through the API, and under which credential". It is not the field to drop the echo of your own write with: use idempotency_key, which you chose and therefore already know, whereas id here is Commune's own identifier for your credential and no operation reports it back to you. A creator can read that identifier in Commune, but it changes when the credential is replaced, so matching on it puts the loop back silently after a rotation.

  Additional properties are NOT allowed.

  Hide actor attributes Show actor attributes object | null

  • type string Required

    api_key for a change made through this API, which is the only value emitted today. user is reserved for a change a named person made through an authenticated session and system for an unattended job; neither is emitted.

    An OAuth access token reports as api_key as well. The two credentials are interchangeable everywhere else in this API, and a separate value here would be a distinction a consumer cannot act on.

    Values are user, api_key, or system.

  • id string Required

    Identifier of the actor within its type. For api_key it is the credential's own id and never its secret, and it is the same value that appears in a creator's list of credentials, so an event can be traced back to the integration that caused it.

  • label string | null

    Human-readable name for display. Best effort, may be null.

• idempotency_key string | null Required

  The Idempotency-Key of the API write that caused this change, so a consumer can tie an event back to its own request and collapse the duplicates a retried write would otherwise produce.

  This is how a consumer that writes recognises its own work. Keep the keys you send, and skip any event carrying one of them. You chose the value, so you know it before the event arrives. actor cannot do this job, because Commune's id for your credential is not something this API reports to you.

  Null for every change that did not come in through this API, which is most of them: an edit made in Commune, an import, a scheduled job and a delivery result all have no originating request to key on.

  It reaches every endpoint registered for the newsletter, not only the one that made the write, so choose opaque keys such as UUIDs rather than keys carrying your own business identifiers.

  Maximum length is 255.

• data object Required

  Event-specific body. Narrowed by each concrete event schema below.

  Hide data attributes Show data attributes object

  • article_id string(uuid) Required
  • title string Required
  • url string(uri) | null

    Canonical public URL. Follows the newsletter's custom website domain when it has an active one, otherwise the Commune-hosted path.

  • reader object | null Required

    The person who gave or withdrew the like. A like requires a Commune account, so this is null only in the case UserRef describes, an account that has since been deleted.

    Hide reader attributes Show reader attributes object | null

    • user_id string Required
    • username string | null
    • display_name string | null
    • avatar_url string(uri) | null
  • direction string Required

    added when the like was given, removed when it was taken back.

    Values are added or removed.

  • like_count integer Required

    The article's whole like tally after this change, counted in the same transaction that made it. The same number Article.stats.likes reports. Carried on both directions, so a consumer never has to add or subtract to stay correct.

    Minimum value is 0.

  • changed_at string(date-time) Required

    When the like was given or withdrawn. Equal to occurred_at.