# 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. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.ergo.services/extra-library/actors.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.