Spacetimedb Client Unreal

Use this skill for Unreal Engine client implementation.

Core Unreal patterns

Generate Unreal bindings with the project module details:

spacetime generate --lang unrealcpp --uproject-dir path/to/Game.uproject --module-path spacetimedb --unreal-module-name Game

Connection shape:

UDbConnection* Conn = UDbConnection::Builder()
    ->WithUri(TEXT("ws://localhost:3000"))
    ->WithDatabaseName(TEXT("my-database"))
    ->OnConnect(OnConnectDelegate)
    ->OnConnectError(OnConnectErrorDelegate)
    ->OnDisconnect(OnDisconnectDelegate)
    ->Build();

Runtime rules

• The Unreal SDK processes messages automatically through WebSocket callbacks and UDbConnection ticking; do not add a manual polling loop unless the project already has one.
• Use generated Conn->Db table objects for subscribed cache reads and Conn->Reducers for reducer calls.
• Bind OnInsert, OnDelete, OnUpdate, and reducer delegates before subscribing when startup events matter.
• SubscribeToAllTables() is useful for examples; production code should subscribe to specific SQL/query sets.
• Use generated Unreal class and delegate names from the project. Do not copy sample UUserTable or FUserType identifiers unless they exist locally.
• Keep plugin setup, generated code, and gameplay classes separate unless the existing project layout combines them.

Reference map

Guidance

• Keep Unreal connection ticking and callback binding patterns consistent with the reference.
• Use generated Unreal class names from the local project rather than copying sample identifiers blindly.
• Route complete Unreal tutorial work to spacetimedb-tutorials.