# Observability

Read in this order:

1. [Overview](overview.md): choose between Event Center, TriggerFlow runtime stream, DevTools, and coding-agent guidance.
2. [Event Center](event-center.md): framework-level observation events and compatibility rules.
3. [DevTools](devtools.md): observation bridge, evaluation bridge, and interactive wrappers.

Observation events observe what happened. TriggerFlow `emit` / `when` changes flow control, and TriggerFlow runtime stream sends live data to consumers.
