Does your use case span team, domain, namespace, region, or cloud boundaries?
Yes
No
Use a single namespace with Workflows and Activities.
Do you need separate namespaces for security, fault isolation, or modularity?
Yes
No
Is Nexus SDK support available for your language?
Yes
No
Do you plan to split into separate namespaces later?
Yes
No
✓ Use Nexus
Is cross-namespace a future goal, not urgent now?
Yes
No
✓ Use Nexus in a single namespace for separation of concerns and easier future migration.
Need cleaner contracts than Child Workflows provide?
Yes
No
✓ Build in isolated namespaces now. Use Nexus to connect them later.
Use Child Workflows in a single namespace. Migration to Nexus is straightforward later.
Question
Use Nexus
Alternative path