Spacetimedb Client Rust

Use this skill for Rust client implementation.

Core Rust patterns

Generate Rust bindings and import generated names from the local module:

spacetime generate --lang rust --out-dir client/src/module_bindings --module-path spacetimedb

use module_bindings::DbConnection;

let conn = DbConnection::builder()
    .with_uri("ws://localhost:3000")
    .with_database_name("my-database")
    .on_connect(|ctx, identity, _token| {
        log::info!("connected: {identity}");
        ctx.subscription_builder().subscribe_to_all_tables();
    })
    .on_connect_error(|_ctx, err| log::error!("connect error: {err}"))
    .on_disconnect(|_ctx, err| log::info!("disconnected: {err:?}"))
    .build()?;

conn.run_threaded();

Runtime rules

• Advance the connection with run_threaded, run_async, or frame_tick; callbacks and cache updates require one of these.
• Read subscribed rows through conn.db.<table>().iter(), .count(), and generated unique/index handles.
• Register on_insert, on_delete, and on_update callbacks on generated table handles; on_update requires a primary key.
• Use conn.reducers.<reducer>(...) or ctx.reducers() in trait-generic callback contexts.
• Keep generated binding module names and feature flags aligned with the local project.

Reference map

Guidance

• Match generated module names and binding paths from the local project.
• Keep connection lifecycle, subscription callbacks, and reducer calls aligned with the Rust SDK reference.
• Route Rust server module schema or reducer code to table and reducer skills rather than this client skill.