Capabilities Overview

Each Dex capability is a distributed-system abstraction. Durable Execution is not a single feature — it is the set of these abstractions working together so backend engineers can persist both data and actions without rebuilding orchestration by hand.

Capabilities are grouped the same way as on superdurable.io/dex:

Basic

Familiar control-flow concepts made durable:

• Durable variables
• Branch & loop
• Backoff retry
• Durable timer

Advanced

Communication, concurrency, and recovery:

• RPC
• Channels
• Fan-out + fan-in
• Error handling & SAGA
• Multi-threading
• Locking
• Waiting
• Storage sync
• And more

Each page covers: why it exists, code examples, a brief implementation sketch, and how teams traditionally work around the problem.