Resonate Saga Pattern — Rust

SDK note (0.6.0). The Rust SDK is in active development. The saga pattern below uses only documented surface (ctx.run, Result<T>, ? propagation). Verify against the current SDK source before shipping.

Overview

A saga is a long-running transaction split into smaller steps, each with a compensating action. Forward steps run top-to-bottom; on failure, compensations run bottom-to-top. Rust expresses this naturally via Result<T> + ? for forward propagation and a tracked "completed" list for compensation dispatch.

For the language-agnostic mental model, see resonate-saga-pattern-typescript.

When to use

• Multi-step workflow where intermediate state is visible to other systems
• Each step is idempotent or inexpensive to retry individually
• Compensation logic exists for every committed step
• You need "all or nothing" consistency without a distributed transaction

Basic shape