​
Chat rooms

Studio: Channels → Add rule: pattern chat:*, Kind Presence, Subscribe and Publish Signed-in users, History depth 100, Message size limit 8192, Publish rate limit 5 per second. App: subscribe to chat:<room>, load history(50), render, send("message", { text }). Show typing with send("typing"). Save messages you must keep to a messages table (the channel is a delivery layer, not storage).

​
Online users

Studio: same rule, Presence on. App: join with { presence: { name } }, render presenceState(), listen to the presence event; group by user_id.

​
Notifications for one person

Studio: Add rule: pattern user:{{ auth.id }}, Kind Private, Subscribe Signed-in users, Publish Secret keys & Studio; Settings → Apps may publish off. App: subscribe to user:<your id>; your server publishes (Publishing). Also write a notifications record so a missed message is still visible.

​
Per-organization feed

Studio: pattern org:{{ auth.org }}, Kind Presence, Subscribe and Publish Signed-in users. App: after switchOrg("acme"), subscribe to org:acme. Re-subscribe on TOKEN_REFRESHED.

​
A live table

Studio: table → Settings → Behaviour → Broadcast changes on. App: Live records: load, then merge created / updated / deleted by id.

​
Collaborative cursors

Studio: pattern doc:*, Kind Presence, Publish rate limit 30 per second, Ephemeral (nothing kept). App: send cursor events at most every 50 ms; render others’ cursors from from.

​
Order tracking

Studio: pattern order:*, Kind Protected (open to listen, only servers publish). App: the customer subscribes to order:<id> and updates the status chip; your flow publishes status events as the order progresses.

​
A live admin dashboard

Studio: pattern metrics:*, Kind Protected, Subscribe role:admin. App: use a stream (stream(["metrics:orders"])) so no socket is needed.

​
Design rules

Channel rules

The Studio form.

Troubleshooting

When it doesn’t work.