> For the complete documentation index, see [llms.txt](https://docs.ergo.services/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.ergo.services/extra-library/actors.md).

# Actors

An extra library of actors implementations not included in the standard Ergo Framework library. This library contains packages with a narrow specialization. It also includes packages with external dependencies, as Ergo Framework adheres to a "zero dependency" policy.

## [Leader](/extra-library/actors/leader.md)

Distributed leader election actor implementing Raft-inspired consensus algorithm. Provides coordination primitives for building systems that require single leader selection across a cluster.

**Use cases:** Task schedulers, resource managers, single-writer databases, distributed locks, cluster coordinators.

## [Metrics](/extra-library/actors/metrics.md)

Prometheus metrics exporter actor that automatically collects and exposes Ergo node and network telemetry via HTTP endpoint. Provides observability for monitoring cluster health and resource usage.

**Use cases:** Production monitoring, performance analysis, capacity planning, debugging distributed systems.