ludic/docs/language/annotations/annot-owned.md
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docs(api): per-symbol pages, fuzzy search, deep token linking, hover cards
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Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
2026-08-29 17:53:22 +03:00

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Markdown

---
id: annot-owned
name: @Owned
category: annotations
kind: annotation
tokens: @Owned
sig: @Owned model Name { … }
tip: Give a model a network owner slot so its instances can be assigned to a peer.
order: 50
---
<code>@Owned</code> declares that every instance of a model carries a network owner — it adds an owner slot to the model (the runtime's <code>@L_owner</code> array), which the builtins <code>owner</code>, <code>set_owner</code>, and <code>is_owner</code> read and assign. A fresh instance starts unowned (<code>-1</code>) until the authority assigns it. Ownership is what gates who may write <code>@Sync(to: owner)</code> fields and who runs <code>@Predicted</code> control handlers, and it is stored in the world snapshot so it round-trips through replication and rollback. Mark the models that represent a player's avatar or units; leave shared scenery unowned.
```ludic
program OwnedModel {
@Sync property Position { column: int = 0, row: int = 0 }
@Owned model Player { @Sync Position } # each Player instance has an owner slot
entry {
spawn Player { Position { column: 5, row: 6 } }
for (Position) in query [Position, {Player}] {
let player_id = self()
print(owner(player_id)) # -1 — unowned until assigned
set_owner(player_id, 0)
print(is_owner(player_id)) # 1 — the local peer now owns it
}
}
}
```