> This page is for NeMo Relay, version dev.
> For other versions, use one of these documentation indexes:
> - Latest (v0.11.1) (default): https://docs.nvidia.com/nemo/relay/latest/llms.txt
> - dev: https://docs.nvidia.com/nemo/relay/dev/llms.txt
> - v0.11.1: https://docs.nvidia.com/nemo/relay/v0.11.1/llms.txt
> - v0.10.4: https://docs.nvidia.com/nemo/relay/v0.10.4/llms.txt
> - v0.9.4: https://docs.nvidia.com/nemo/relay/v0.9.4/llms.txt
> - v0.8.4: https://docs.nvidia.com/nemo/relay/v0.8.4/llms.txt
> - v0.7.3: https://docs.nvidia.com/nemo/relay/v0.7.3/llms.txt

> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://docs.nvidia.com/nemo/relay/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://docs.nvidia.com/nemo/relay/_mcp/server.

# Module composition

> Services supplied by the SDK or an embedding application. Component services supplied by plugin-host or an embedding application.

Generated from `cargo doc --no-deps -p nemo-relay-builtins -p nemo-relay-diagnostics -p nemo-relay-logging -p nemo-relay-plugin-host -p nemo-relay-codecs -p nemo-relay -p nemo-relay-runtime -p nemo-relay-model-pricing -p nemo-relay-resource-metrics -p nemo-relay-observability -p nemo-relay-adaptive -p nemo-relay-pii-redaction -p nemo-relay-ffi -p nemo-relay-types -p nemo-relay-plugin -p nemo-relay-worker-proto -p nemo-relay-worker`.

Services supplied by the SDK or an embedding application. Component services supplied by plugin-host or an embedding application.

## Structs

* [RuntimeServices](/nemo/relay/dev/reference/api/rust-library-reference/nemo-relay-runtime/composition/struct-runtimeservices): Composition callbacks owned by the embedding host, independent from the runtime engine.

## Functions

* [install_runtime_services](/nemo/relay/dev/reference/api/rust-library-reference/nemo-relay-runtime/composition/fn-install-runtime-services): Install composition once; subsequent initialization entry points preserve the chosen host.
* [services](/nemo/relay/dev/reference/api/rust-library-reference/nemo-relay-runtime/composition/fn-services): Return the host services, or an uncomposed engine with no built-in components.

## Type Aliases

* [SnapshotSink](/nemo/relay/dev/reference/api/rust-library-reference/nemo-relay-runtime/composition/type-snapshotsink): Callback receiving a resource snapshot without owning a collection implementation.