> 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/advanced.md).

# Advanced

- [Handling Sync Requests](https://docs.ergo.services/advanced/handle-sync.md): Handling synchronous requests in the asynchronous actor model
- [Important Delivery Flag](https://docs.ergo.services/advanced/important-delivery.md): Guaranteed message delivery with acknowledgment
- [Pub/Sub Internals](https://docs.ergo.services/advanced/pub-sub-internals.md): How the Pub/Sub system works internally
- [Message Versioning](https://docs.ergo.services/advanced/message-versioning.md): Evolving message contracts in distributed clusters
- [Building a Cluster](https://docs.ergo.services/advanced/building-a-cluster.md): Building production clusters with Ergo technologies
- [Debugging](https://docs.ergo.services/advanced/debugging.md)
- [Distributed Tracing](https://docs.ergo.services/advanced/distributed-tracing.md): Distributed tracing across actor message chains
- [Inspecting Actor State](https://docs.ergo.services/advanced/inspecting-state.md): HandleInspect as the observability surface of an actor, and what it makes possible
- [Inspecting With Observer](https://docs.ergo.services/advanced/observer.md): Real-time inspection and management of Ergo nodes
- [Inspecting With an AI Agent](https://docs.ergo.services/advanced/mcp.md): What your AI agent can do with a live Ergo cluster over MCP