Schema: https://gerrit.wikimedia.org/r/c/schemas/event/secondary/+/773382/2/jsonschema/analytics/mediawiki/wikistories_consumption_event/1.0.0.json (there's an example of an event at the bottom of the schema)
Instrumentation plan: https://docs.google.com/document/d/10saUCO6lIl8CsSJ4wOOuEfDlyagdP3DMXFP9q4ByMP8/edit#heading=h.187jptb4zpka
Events to log:
* story_impression
* story_view
Fields to log for each event is described in the plan and the schema.
Example event logging from javascript
```lang=js
mw.eventLog.submit( 'analytics/mediawiki/wikistories_consumption_event', {
"$schema": "/analytics/mediawiki/wikistories_consumption_event/1.0.0",
"meta": {
"stream": "mediawiki.wikistories_consumption_event",
"domain": "id.m.wikipedia.org",
"dt": "2022-11-11T00:40:00.649Z"
},
"event_type": "story_view",
"activity_session_id": "46e8e1f264c66cbf13fa",
"pageview_id": "0578dbb2215dc583d147",
"access_method": "mobile web",
"page_title": "Istanbul",
"page_story_count": 3,
"page_visible_time": 84124,
"story_open_time": 29018,
"referrer_type": "internal",
"story_title": "Kucing_Istanbul",
"story_frame_count": 6,
"story_frames_viewed": 6,
"story_completed": true,
"next_story_opened": false,
"experiment_group": "wikistories",
"experiment_entry_date": "2022-10-27",
"session_is_first_of_day": true,
"session_days": [ 1, 4, 5, 9, 16 ]
} );
```