Wavelet

Wavelet is a reactive backend that pushes pre-computed SQL query results to apps and AI agents over WebSocket.

Core Concepts

• Streams -- event ingestion tables. Defined with typed columns.
• Views -- SQL materialized views that incrementally recompute when source data changes.
• Subscriptions -- WebSocket connections that receive diffs when a view changes.
• filterBy -- JWT-based per-tenant row filtering, enforced server-side.

Config File: wavelet.config.ts

Everything is defined in a single config file. The full type signature:

import { defineConfig, sql } from '@risingwave/wavelet'

export default defineConfig({