Temporal Signals for Automated Coordination#

In Temporal Signals for Manual Interaction, you learned how external systems and humans send signals to running workflows. Signals are not limited to human input. They are a general-purpose communication channel between workflows, and they become powerful coordination primitives when workflows signal each other programmatically.

This article covers automated signal patterns: cross-workflow signaling, distributed mutexes built on signals, blocking semantics, and the anti-patterns that will burn you.