> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://docs.nvidia.com/nemo/relay/v0.5.0/reference/api/rust-library-reference/nemo-relay-plugin/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://docs.nvidia.com/nemo/relay/_mcp/server.

# nemo-relay-plugin

> Stable native plugin ABI and Rust authoring helpers for NeMo Relay.

Generated from `cargo doc --no-deps -p nemo-relay -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`.

Stable native plugin ABI and Rust authoring helpers for NeMo Relay.

This crate intentionally does not depend on the `nemo-relay` runtime crate. Native plugins built with it communicate with a host through versioned C-compatible tables and host-owned string handles.

## Macros

* [nemo\_relay\_plugin](/reference/api/rust-library-reference/nemo-relay-plugin/macro-nemo-relay-plugin): Exports a concrete plugin constructor as a native plugin entry symbol body.

## Structs

* [AnnotatedLlmRequest](/reference/api/rust-library-reference/nemo-relay-plugin/struct-annotatedllmrequest): Structured view of an LLM request, produced by a Codec from opaque [`LlmRequest`](/reference/api/rust-library-reference/nemo-relay-plugin/struct-llmrequest) content.
* [AnnotatedLlmResponse](/reference/api/rust-library-reference/nemo-relay-plugin/struct-annotatedllmresponse): Structured view of an LLM response, produced by a response codec from raw JSON API output.
* [CategoryProfile](/reference/api/rust-library-reference/nemo-relay-plugin/struct-categoryprofile): Category-specific profile data.
* [ConfigDiagnostic](/reference/api/rust-library-reference/nemo-relay-plugin/struct-configdiagnostic): Structured validation diagnostic for plugin validation.
* [EventCategory](/reference/api/rust-library-reference/nemo-relay-plugin/struct-eventcategory): Semantic category carried by ATOF `category`.
* [LlmAttributes](/reference/api/rust-library-reference/nemo-relay-plugin/struct-llmattributes): Bitflags that modify LLM-call behavior and observability.
* [LlmNext](/reference/api/rust-library-reference/nemo-relay-plugin/struct-llmnext): Typed continuation passed to LLM execution intercepts.
* [LlmRequest](/reference/api/rust-library-reference/nemo-relay-plugin/struct-llmrequest): JSON-shaped LLM request payload passed through the runtime.
* [LlmRequestInterceptOutcome](/reference/api/rust-library-reference/nemo-relay-plugin/struct-llmrequestinterceptoutcome): Result of an LLM request intercept that can schedule lifecycle marks.
* [LlmStream](/reference/api/rust-library-reference/nemo-relay-plugin/struct-llmstream): Host- or plugin-owned stream returned across the native LLM stream ABI.
* [LlmStreamNext](/reference/api/rust-library-reference/nemo-relay-plugin/struct-llmstreamnext): Typed continuation passed to LLM stream execution intercepts.
* [NemoRelayNativeHostApiV1](/reference/api/rust-library-reference/nemo-relay-plugin/struct-nemorelaynativehostapiv1): Versioned host API table passed to native plugin entry symbols.
* [NemoRelayNativeLlmStreamV1](/reference/api/rust-library-reference/nemo-relay-plugin/struct-nemorelaynativellmstreamv1): Native LLM JSON stream handle table.
* [NemoRelayNativePluginContext](/reference/api/rust-library-reference/nemo-relay-plugin/struct-nemorelaynativeplugincontext): Opaque plugin registration context borrowed from the host during registration.
* [NemoRelayNativePluginV1](/reference/api/rust-library-reference/nemo-relay-plugin/struct-nemorelaynativepluginv1): Versioned plugin descriptor returned by native plugin entry symbols.
* [NemoRelayNativeScopeHandle](/reference/api/rust-library-reference/nemo-relay-plugin/struct-nemorelaynativescopehandle): Opaque host-owned scope handle.
* [NemoRelayNativeScopeStack](/reference/api/rust-library-reference/nemo-relay-plugin/struct-nemorelaynativescopestack): Opaque host-owned scope stack handle.
* [NemoRelayNativeScopeStackBinding](/reference/api/rust-library-reference/nemo-relay-plugin/struct-nemorelaynativescopestackbinding): Opaque host-owned captured scope-stack binding.
* [NemoRelayNativeString](/reference/api/rust-library-reference/nemo-relay-plugin/struct-nemorelaynativestring): Opaque host-owned UTF-8 string or JSON byte buffer.
* [PendingMarkSpec](/reference/api/rust-library-reference/nemo-relay-plugin/struct-pendingmarkspec): Mark requested by middleware for materialization by a lifecycle owner.
* [PluginContext](/reference/api/rust-library-reference/nemo-relay-plugin/struct-plugincontext): Borrowed safe wrapper around a host plugin registration context.
* [PluginRuntime](/reference/api/rust-library-reference/nemo-relay-plugin/struct-pluginruntime): Cloneable high-level runtime handle for host APIs available to native plugins.
* [ScopeAttributes](/reference/api/rust-library-reference/nemo-relay-plugin/struct-scopeattributes): Bitflags that modify scope behavior and observability.
* [ScopeGuard](/reference/api/rust-library-reference/nemo-relay-plugin/struct-scopeguard): RAII guard for a host scope opened by [`PluginRuntime::scope`](/reference/api/rust-library-reference/nemo-relay-plugin/struct-pluginruntime).
* [ScopeHandle](/reference/api/rust-library-reference/nemo-relay-plugin/struct-scopehandle): Host-owned scope handle returned by native scope APIs.
* [ScopeStack](/reference/api/rust-library-reference/nemo-relay-plugin/struct-scopestack): Host-owned isolated scope stack returned by native scope-stack APIs.
* [ScopeStackBinding](/reference/api/rust-library-reference/nemo-relay-plugin/struct-scopestackbinding): Captured thread-local scope-stack binding.
* [ThreadScopeStackGuard](/reference/api/rust-library-reference/nemo-relay-plugin/struct-threadscopestackguard): RAII guard that restores the previous thread-local scope stack on drop.
* [ToolAttributes](/reference/api/rust-library-reference/nemo-relay-plugin/struct-toolattributes): Bitflags that modify tool-call behavior and observability.
* [ToolExecutionInterceptOutcome](/reference/api/rust-library-reference/nemo-relay-plugin/struct-toolexecutioninterceptoutcome): Canonical result returned by a tool execution intercept.
* [ToolNext](/reference/api/rust-library-reference/nemo-relay-plugin/struct-toolnext): Typed continuation passed to tool execution intercepts.

## Enums

* [DiagnosticLevel](/reference/api/rust-library-reference/nemo-relay-plugin/enum-diagnosticlevel): Diagnostic severity returned by plugin validation.
* [Event](/reference/api/rust-library-reference/nemo-relay-plugin/enum-event): Tagged union covering the two ATOF event kinds emitted by the runtime.
* [HandleAttributes](/reference/api/rust-library-reference/nemo-relay-plugin/enum-handleattributes): Attribute bitflags attached to a concrete handle kind.
* [NemoRelayNativeScopeType](/reference/api/rust-library-reference/nemo-relay-plugin/enum-nemorelaynativescopetype): Scope category used by native plugins when opening scopes.
* [NemoRelayStatus](/reference/api/rust-library-reference/nemo-relay-plugin/enum-nemorelaystatus): Status codes returned by stable native ABI functions.
* [ScopeCategory](/reference/api/rust-library-reference/nemo-relay-plugin/enum-scopecategory): Agent Trajectory Observability Format (ATOF) lifecycle phase for a scope event.
* [ScopeType](/reference/api/rust-library-reference/nemo-relay-plugin/enum-scopetype): Semantic category attached to a scope lifecycle span.

## Constants

* [NEMO\_RELAY\_NATIVE\_ABI\_VERSION](/reference/api/rust-library-reference/nemo-relay-plugin/constant-nemo-relay-native-abi-version): Native plugin ABI version supported by this crate.

## Traits

* [NativePlugin](/reference/api/rust-library-reference/nemo-relay-plugin/trait-nativeplugin): Trait implemented by Rust native plugins.

## Functions

* [capture\_scope\_stack\_thread](/reference/api/rust-library-reference/nemo-relay-plugin/fn-capture-scope-stack-thread): Captures the current thread-local scope-stack binding.
* [create\_scope\_stack](/reference/api/rust-library-reference/nemo-relay-plugin/fn-create-scope-stack): Creates a new independent scope stack.
* [current\_scope](/reference/api/rust-library-reference/nemo-relay-plugin/fn-current-scope): Retrieves the current scope handle.
* [emit\_mark](/reference/api/rust-library-reference/nemo-relay-plugin/fn-emit-mark): Emits a mark event under the current scope.
* [export\_plugin](/reference/api/rust-library-reference/nemo-relay-plugin/fn-export-plugin): Initializes a native plugin descriptor for a Rust SDK plugin value.
* [pop\_scope](/reference/api/rust-library-reference/nemo-relay-plugin/fn-pop-scope): Pops a scope and emits its end event.
* [push\_scope](/reference/api/rust-library-reference/nemo-relay-plugin/fn-push-scope): Pushes a scope and emits its start event.

## Type Aliases

* [Json](/reference/api/rust-library-reference/nemo-relay-plugin/type-json): Type alias for [`serde_json::Value`](https://docs.rs/serde_json/1.0.149/serde_json/value/enum.Value.html), used as the universal JSON representation throughout NeMo Relay APIs.
* [LlmJsonStream](/reference/api/rust-library-reference/nemo-relay-plugin/type-llmjsonstream): Synchronous JSON chunk stream used by native LLM stream intercept helpers.
* [NemoRelayNativeEventSubscriberCb](/reference/api/rust-library-reference/nemo-relay-plugin/type-nemorelaynativeeventsubscribercb): Native event subscriber callback.
* [NemoRelayNativeFreeFn](/reference/api/rust-library-reference/nemo-relay-plugin/type-nemorelaynativefreefn): Optional destructor for user data captured by native callbacks.
* [NemoRelayNativeJsonCb](/reference/api/rust-library-reference/nemo-relay-plugin/type-nemorelaynativejsoncb): Native JSON transform callback for LLM response sanitizers.
* [NemoRelayNativeLlmConditionalCb](/reference/api/rust-library-reference/nemo-relay-plugin/type-nemorelaynativellmconditionalcb): Native LLM conditional-execution callback.
* [NemoRelayNativeLlmExecutionCb](/reference/api/rust-library-reference/nemo-relay-plugin/type-nemorelaynativellmexecutioncb): Native LLM execution intercept callback.
* [NemoRelayNativeLlmNextFn](/reference/api/rust-library-reference/nemo-relay-plugin/type-nemorelaynativellmnextfn): Runtime-provided continuation for LLM execution intercepts.
* [NemoRelayNativeLlmRequestCb](/reference/api/rust-library-reference/nemo-relay-plugin/type-nemorelaynativellmrequestcb): Native LLM request transform callback for request sanitizers.
* [NemoRelayNativeLlmRequestInterceptCb](/reference/api/rust-library-reference/nemo-relay-plugin/type-nemorelaynativellmrequestinterceptcb): Native LLM request intercept callback.
* [NemoRelayNativeLlmStreamCancelFn](/reference/api/rust-library-reference/nemo-relay-plugin/type-nemorelaynativellmstreamcancelfn): Optional native stream cancellation callback.
* [NemoRelayNativeLlmStreamDropFn](/reference/api/rust-library-reference/nemo-relay-plugin/type-nemorelaynativellmstreamdropfn): Optional native stream destructor callback.
* [NemoRelayNativeLlmStreamExecutionCb](/reference/api/rust-library-reference/nemo-relay-plugin/type-nemorelaynativellmstreamexecutioncb): Native LLM stream execution intercept callback.
* [NemoRelayNativeLlmStreamNextFn](/reference/api/rust-library-reference/nemo-relay-plugin/type-nemorelaynativellmstreamnextfn): Runtime-provided continuation for LLM stream execution intercepts.
* [NemoRelayNativeLlmStreamPollFn](/reference/api/rust-library-reference/nemo-relay-plugin/type-nemorelaynativellmstreampollfn): Native stream poll callback.
* [NemoRelayNativePluginDropFn](/reference/api/rust-library-reference/nemo-relay-plugin/type-nemorelaynativeplugindropfn): Native plugin drop callback.
* [NemoRelayNativePluginEntry](/reference/api/rust-library-reference/nemo-relay-plugin/type-nemorelaynativepluginentry): Native entry symbol type loaded by the host.
* [NemoRelayNativePluginRegisterFn](/reference/api/rust-library-reference/nemo-relay-plugin/type-nemorelaynativepluginregisterfn): Native plugin registration callback.
* [NemoRelayNativePluginValidateFn](/reference/api/rust-library-reference/nemo-relay-plugin/type-nemorelaynativepluginvalidatefn): Native plugin validation callback.
* [NemoRelayNativeToolConditionalCb](/reference/api/rust-library-reference/nemo-relay-plugin/type-nemorelaynativetoolconditionalcb): Native tool conditional-execution callback.
* [NemoRelayNativeToolExecutionCb](/reference/api/rust-library-reference/nemo-relay-plugin/type-nemorelaynativetoolexecutioncb): Native tool execution intercept callback.
* [NemoRelayNativeToolJsonCb](/reference/api/rust-library-reference/nemo-relay-plugin/type-nemorelaynativetooljsoncb): Native JSON transform callback for tool request/response sanitizers and tool request intercepts.
* [NemoRelayNativeToolNextFn](/reference/api/rust-library-reference/nemo-relay-plugin/type-nemorelaynativetoolnextfn): Runtime-provided continuation for tool execution intercepts.
* [NemoRelayNativeWithScopeStackCb](/reference/api/rust-library-reference/nemo-relay-plugin/type-nemorelaynativewithscopestackcb): Native callback executed while a host scope stack is temporarily active.
* [Result](/reference/api/rust-library-reference/nemo-relay-plugin/type-result): Result type used by the Rust native plugin SDK.

> Stable native plugin ABI and Rust authoring helpers for NeMo Relay.

## Docs

- [Macro nemo_relay_plugin](https://docs.nvidia.com/nemo/relay/v0.5.0/reference/api/rust-library-reference/nemo-relay-plugin/macro-nemo-relay-plugin.md): Exports a concrete plugin constructor as a native plugin entry symbol body.
- [Struct Annotated LlmRequest](https://docs.nvidia.com/nemo/relay/v0.5.0/reference/api/rust-library-reference/nemo-relay-plugin/struct-annotatedllmrequest.md): Structured view of an LLM request, produced by a Codec from opaque `LlmRequest` content.
- [Struct Annotated LlmResponse](https://docs.nvidia.com/nemo/relay/v0.5.0/reference/api/rust-library-reference/nemo-relay-plugin/struct-annotatedllmresponse.md): Structured view of an LLM response, produced by a response codec from raw JSON API output.
- [Struct Category Profile](https://docs.nvidia.com/nemo/relay/v0.5.0/reference/api/rust-library-reference/nemo-relay-plugin/struct-categoryprofile.md): Category-specific profile data.
- [Struct Config Diagnostic](https://docs.nvidia.com/nemo/relay/v0.5.0/reference/api/rust-library-reference/nemo-relay-plugin/struct-configdiagnostic.md): Structured validation diagnostic for plugin validation.
- [Struct Event Category](https://docs.nvidia.com/nemo/relay/v0.5.0/reference/api/rust-library-reference/nemo-relay-plugin/struct-eventcategory.md): Semantic category carried by ATOF `category`.
- [Struct LlmAttributes](https://docs.nvidia.com/nemo/relay/v0.5.0/reference/api/rust-library-reference/nemo-relay-plugin/struct-llmattributes.md): Bitflags that modify LLM-call behavior and observability.
- [Struct LlmNext](https://docs.nvidia.com/nemo/relay/v0.5.0/reference/api/rust-library-reference/nemo-relay-plugin/struct-llmnext.md): Typed continuation passed to LLM execution intercepts.
- [Struct LlmRequest](https://docs.nvidia.com/nemo/relay/v0.5.0/reference/api/rust-library-reference/nemo-relay-plugin/struct-llmrequest.md): JSON-shaped LLM request payload passed through the runtime.
- [Struct LlmRequest Intercept Outcome](https://docs.nvidia.com/nemo/relay/v0.5.0/reference/api/rust-library-reference/nemo-relay-plugin/struct-llmrequestinterceptoutcome.md): Result of an LLM request intercept that can schedule lifecycle marks.
- [Struct LlmStream](https://docs.nvidia.com/nemo/relay/v0.5.0/reference/api/rust-library-reference/nemo-relay-plugin/struct-llmstream.md): Host- or plugin-owned stream returned across the native LLM stream ABI.
- [Struct LlmStream Next](https://docs.nvidia.com/nemo/relay/v0.5.0/reference/api/rust-library-reference/nemo-relay-plugin/struct-llmstreamnext.md): Typed continuation passed to LLM stream execution intercepts.
- [Struct Nemo Relay Native Host ApiV1](https://docs.nvidia.com/nemo/relay/v0.5.0/reference/api/rust-library-reference/nemo-relay-plugin/struct-nemorelaynativehostapiv1.md): Versioned host API table passed to native plugin entry symbols.
- [Struct Nemo Relay Native LlmStream V1](https://docs.nvidia.com/nemo/relay/v0.5.0/reference/api/rust-library-reference/nemo-relay-plugin/struct-nemorelaynativellmstreamv1.md): Native LLM JSON stream handle table.
- [Struct Nemo Relay Native Plugin Context](https://docs.nvidia.com/nemo/relay/v0.5.0/reference/api/rust-library-reference/nemo-relay-plugin/struct-nemorelaynativeplugincontext.md): Opaque plugin registration context borrowed from the host during registration.
- [Struct Nemo Relay Native Plugin V1](https://docs.nvidia.com/nemo/relay/v0.5.0/reference/api/rust-library-reference/nemo-relay-plugin/struct-nemorelaynativepluginv1.md): Versioned plugin descriptor returned by native plugin entry symbols.
- [Struct Nemo Relay Native Scope Handle](https://docs.nvidia.com/nemo/relay/v0.5.0/reference/api/rust-library-reference/nemo-relay-plugin/struct-nemorelaynativescopehandle.md): Opaque host-owned scope handle.
- [Struct Nemo Relay Native Scope Stack](https://docs.nvidia.com/nemo/relay/v0.5.0/reference/api/rust-library-reference/nemo-relay-plugin/struct-nemorelaynativescopestack.md): Opaque host-owned scope stack handle.
- [Struct Nemo Relay Native Scope Stack Binding](https://docs.nvidia.com/nemo/relay/v0.5.0/reference/api/rust-library-reference/nemo-relay-plugin/struct-nemorelaynativescopestackbinding.md): Opaque host-owned captured scope-stack binding.
- [Struct Nemo Relay Native String](https://docs.nvidia.com/nemo/relay/v0.5.0/reference/api/rust-library-reference/nemo-relay-plugin/struct-nemorelaynativestring.md): Opaque host-owned UTF-8 string or JSON byte buffer.
- [Struct Pending Mark Spec](https://docs.nvidia.com/nemo/relay/v0.5.0/reference/api/rust-library-reference/nemo-relay-plugin/struct-pendingmarkspec.md): Mark requested by middleware for materialization by a lifecycle owner.
- [Struct Plugin Context](https://docs.nvidia.com/nemo/relay/v0.5.0/reference/api/rust-library-reference/nemo-relay-plugin/struct-plugincontext.md): Borrowed safe wrapper around a host plugin registration context.
- [Struct Plugin Runtime](https://docs.nvidia.com/nemo/relay/v0.5.0/reference/api/rust-library-reference/nemo-relay-plugin/struct-pluginruntime.md): Cloneable high-level runtime handle for host APIs available to native plugins.
- [Struct Scope Attributes](https://docs.nvidia.com/nemo/relay/v0.5.0/reference/api/rust-library-reference/nemo-relay-plugin/struct-scopeattributes.md): Bitflags that modify scope behavior and observability.
- [Struct Scope Guard](https://docs.nvidia.com/nemo/relay/v0.5.0/reference/api/rust-library-reference/nemo-relay-plugin/struct-scopeguard.md): RAII guard for a host scope opened by `PluginRuntime::scope`.
- [Struct Scope Handle](https://docs.nvidia.com/nemo/relay/v0.5.0/reference/api/rust-library-reference/nemo-relay-plugin/struct-scopehandle.md): Host-owned scope handle returned by native scope APIs.
- [Struct Scope Stack](https://docs.nvidia.com/nemo/relay/v0.5.0/reference/api/rust-library-reference/nemo-relay-plugin/struct-scopestack.md): Host-owned isolated scope stack returned by native scope-stack APIs.
- [Struct Scope Stack Binding](https://docs.nvidia.com/nemo/relay/v0.5.0/reference/api/rust-library-reference/nemo-relay-plugin/struct-scopestackbinding.md): Captured thread-local scope-stack binding.
- [Struct Thread Scope Stack Guard](https://docs.nvidia.com/nemo/relay/v0.5.0/reference/api/rust-library-reference/nemo-relay-plugin/struct-threadscopestackguard.md): RAII guard that restores the previous thread-local scope stack on drop.
- [Struct Tool Attributes](https://docs.nvidia.com/nemo/relay/v0.5.0/reference/api/rust-library-reference/nemo-relay-plugin/struct-toolattributes.md): Bitflags that modify tool-call behavior and observability.
- [Struct Tool Execution Intercept Outcome](https://docs.nvidia.com/nemo/relay/v0.5.0/reference/api/rust-library-reference/nemo-relay-plugin/struct-toolexecutioninterceptoutcome.md): Canonical result returned by a tool execution intercept.
- [Struct Tool Next](https://docs.nvidia.com/nemo/relay/v0.5.0/reference/api/rust-library-reference/nemo-relay-plugin/struct-toolnext.md): Typed continuation passed to tool execution intercepts.
- [Enum Diagnostic Level](https://docs.nvidia.com/nemo/relay/v0.5.0/reference/api/rust-library-reference/nemo-relay-plugin/enum-diagnosticlevel.md): Diagnostic severity returned by plugin validation.
- [Enum Event](https://docs.nvidia.com/nemo/relay/v0.5.0/reference/api/rust-library-reference/nemo-relay-plugin/enum-event.md): Tagged union covering the two ATOF event kinds emitted by the runtime.
- [Enum Handle Attributes](https://docs.nvidia.com/nemo/relay/v0.5.0/reference/api/rust-library-reference/nemo-relay-plugin/enum-handleattributes.md): Attribute bitflags attached to a concrete handle kind.
- [Enum Nemo Relay Native Scope Type](https://docs.nvidia.com/nemo/relay/v0.5.0/reference/api/rust-library-reference/nemo-relay-plugin/enum-nemorelaynativescopetype.md): Scope category used by native plugins when opening scopes.
- [Enum Nemo Relay Status](https://docs.nvidia.com/nemo/relay/v0.5.0/reference/api/rust-library-reference/nemo-relay-plugin/enum-nemorelaystatus.md): Status codes returned by stable native ABI functions.
- [Enum Scope Category](https://docs.nvidia.com/nemo/relay/v0.5.0/reference/api/rust-library-reference/nemo-relay-plugin/enum-scopecategory.md): Agent Trajectory Observability Format (ATOF) lifecycle phase for a scope event.
- [Enum Scope Type](https://docs.nvidia.com/nemo/relay/v0.5.0/reference/api/rust-library-reference/nemo-relay-plugin/enum-scopetype.md): Semantic category attached to a scope lifecycle span.
- [Constant NEMO_RELAY_NATIVE_ABI_VERSION](https://docs.nvidia.com/nemo/relay/v0.5.0/reference/api/rust-library-reference/nemo-relay-plugin/constant-nemo-relay-native-abi-version.md): Native plugin ABI version supported by this crate.
- [Trait Native Plugin](https://docs.nvidia.com/nemo/relay/v0.5.0/reference/api/rust-library-reference/nemo-relay-plugin/trait-nativeplugin.md): Trait implemented by Rust native plugins.
- [Function capture_scope_stack_thread](https://docs.nvidia.com/nemo/relay/v0.5.0/reference/api/rust-library-reference/nemo-relay-plugin/fn-capture-scope-stack-thread.md): Captures the current thread-local scope-stack binding.
- [Function create_scope_stack](https://docs.nvidia.com/nemo/relay/v0.5.0/reference/api/rust-library-reference/nemo-relay-plugin/fn-create-scope-stack.md): Creates a new independent scope stack.
- [Function current_scope](https://docs.nvidia.com/nemo/relay/v0.5.0/reference/api/rust-library-reference/nemo-relay-plugin/fn-current-scope.md): Retrieves the current scope handle.
- [Function emit_mark](https://docs.nvidia.com/nemo/relay/v0.5.0/reference/api/rust-library-reference/nemo-relay-plugin/fn-emit-mark.md): Emits a mark event under the current scope.
- [Function export_plugin](https://docs.nvidia.com/nemo/relay/v0.5.0/reference/api/rust-library-reference/nemo-relay-plugin/fn-export-plugin.md): Initializes a native plugin descriptor for a Rust SDK plugin value.
- [Function pop_scope](https://docs.nvidia.com/nemo/relay/v0.5.0/reference/api/rust-library-reference/nemo-relay-plugin/fn-pop-scope.md): Pops a scope and emits its end event.
- [Function push_scope](https://docs.nvidia.com/nemo/relay/v0.5.0/reference/api/rust-library-reference/nemo-relay-plugin/fn-push-scope.md): Pushes a scope and emits its start event.
- [Type Alias Json](https://docs.nvidia.com/nemo/relay/v0.5.0/reference/api/rust-library-reference/nemo-relay-plugin/type-json.md): Type alias for `serde_json::Value`, used as the universal JSON representation throughout NeMo Relay APIs.
- [Type Alias LlmJson Stream](https://docs.nvidia.com/nemo/relay/v0.5.0/reference/api/rust-library-reference/nemo-relay-plugin/type-llmjsonstream.md): Synchronous JSON chunk stream used by native LLM stream intercept helpers.
- [Type Alias Nemo Relay Native Event Subscriber Cb](https://docs.nvidia.com/nemo/relay/v0.5.0/reference/api/rust-library-reference/nemo-relay-plugin/type-nemorelaynativeeventsubscribercb.md): Native event subscriber callback.
- [Type Alias Nemo Relay Native Free Fn](https://docs.nvidia.com/nemo/relay/v0.5.0/reference/api/rust-library-reference/nemo-relay-plugin/type-nemorelaynativefreefn.md): Optional destructor for user data captured by native callbacks.
- [Type Alias Nemo Relay Native Json Cb](https://docs.nvidia.com/nemo/relay/v0.5.0/reference/api/rust-library-reference/nemo-relay-plugin/type-nemorelaynativejsoncb.md): Native JSON transform callback for LLM response sanitizers.
- [Type Alias Nemo Relay Native LlmConditional Cb](https://docs.nvidia.com/nemo/relay/v0.5.0/reference/api/rust-library-reference/nemo-relay-plugin/type-nemorelaynativellmconditionalcb.md): Native LLM conditional-execution callback.
- [Type Alias Nemo Relay Native LlmExecution Cb](https://docs.nvidia.com/nemo/relay/v0.5.0/reference/api/rust-library-reference/nemo-relay-plugin/type-nemorelaynativellmexecutioncb.md): Native LLM execution intercept callback.
- [Type Alias Nemo Relay Native LlmNext Fn](https://docs.nvidia.com/nemo/relay/v0.5.0/reference/api/rust-library-reference/nemo-relay-plugin/type-nemorelaynativellmnextfn.md): Runtime-provided continuation for LLM execution intercepts.
- [Type Alias Nemo Relay Native LlmRequest Cb](https://docs.nvidia.com/nemo/relay/v0.5.0/reference/api/rust-library-reference/nemo-relay-plugin/type-nemorelaynativellmrequestcb.md): Native LLM request transform callback for request sanitizers.
- [Type Alias Nemo Relay Native LlmRequest Intercept Cb](https://docs.nvidia.com/nemo/relay/v0.5.0/reference/api/rust-library-reference/nemo-relay-plugin/type-nemorelaynativellmrequestinterceptcb.md): Native LLM request intercept callback.
- [Type Alias Nemo Relay Native LlmStream Cancel Fn](https://docs.nvidia.com/nemo/relay/v0.5.0/reference/api/rust-library-reference/nemo-relay-plugin/type-nemorelaynativellmstreamcancelfn.md): Optional native stream cancellation callback.
- [Type Alias Nemo Relay Native LlmStream Drop Fn](https://docs.nvidia.com/nemo/relay/v0.5.0/reference/api/rust-library-reference/nemo-relay-plugin/type-nemorelaynativellmstreamdropfn.md): Optional native stream destructor callback.
- [Type Alias Nemo Relay Native LlmStream Execution Cb](https://docs.nvidia.com/nemo/relay/v0.5.0/reference/api/rust-library-reference/nemo-relay-plugin/type-nemorelaynativellmstreamexecutioncb.md): Native LLM stream execution intercept callback.
- [Type Alias Nemo Relay Native LlmStream Next Fn](https://docs.nvidia.com/nemo/relay/v0.5.0/reference/api/rust-library-reference/nemo-relay-plugin/type-nemorelaynativellmstreamnextfn.md): Runtime-provided continuation for LLM stream execution intercepts.
- [Type Alias Nemo Relay Native LlmStream Poll Fn](https://docs.nvidia.com/nemo/relay/v0.5.0/reference/api/rust-library-reference/nemo-relay-plugin/type-nemorelaynativellmstreampollfn.md): Native stream poll callback.
- [Type Alias Nemo Relay Native Plugin Drop Fn](https://docs.nvidia.com/nemo/relay/v0.5.0/reference/api/rust-library-reference/nemo-relay-plugin/type-nemorelaynativeplugindropfn.md): Native plugin drop callback.
- [Type Alias Nemo Relay Native Plugin Entry](https://docs.nvidia.com/nemo/relay/v0.5.0/reference/api/rust-library-reference/nemo-relay-plugin/type-nemorelaynativepluginentry.md): Native entry symbol type loaded by the host.
- [Type Alias Nemo Relay Native Plugin Register Fn](https://docs.nvidia.com/nemo/relay/v0.5.0/reference/api/rust-library-reference/nemo-relay-plugin/type-nemorelaynativepluginregisterfn.md): Native plugin registration callback.
- [Type Alias Nemo Relay Native Plugin Validate Fn](https://docs.nvidia.com/nemo/relay/v0.5.0/reference/api/rust-library-reference/nemo-relay-plugin/type-nemorelaynativepluginvalidatefn.md): Native plugin validation callback.
- [Type Alias Nemo Relay Native Tool Conditional Cb](https://docs.nvidia.com/nemo/relay/v0.5.0/reference/api/rust-library-reference/nemo-relay-plugin/type-nemorelaynativetoolconditionalcb.md): Native tool conditional-execution callback.
- [Type Alias Nemo Relay Native Tool Execution Cb](https://docs.nvidia.com/nemo/relay/v0.5.0/reference/api/rust-library-reference/nemo-relay-plugin/type-nemorelaynativetoolexecutioncb.md): Native tool execution intercept callback.
- [Type Alias Nemo Relay Native Tool Json Cb](https://docs.nvidia.com/nemo/relay/v0.5.0/reference/api/rust-library-reference/nemo-relay-plugin/type-nemorelaynativetooljsoncb.md): Native JSON transform callback for tool request/response sanitizers and tool request intercepts.
- [Type Alias Nemo Relay Native Tool Next Fn](https://docs.nvidia.com/nemo/relay/v0.5.0/reference/api/rust-library-reference/nemo-relay-plugin/type-nemorelaynativetoolnextfn.md): Runtime-provided continuation for tool execution intercepts.
- [Type Alias Nemo Relay Native With Scope Stack Cb](https://docs.nvidia.com/nemo/relay/v0.5.0/reference/api/rust-library-reference/nemo-relay-plugin/type-nemorelaynativewithscopestackcb.md): Native callback executed while a host scope stack is temporarily active.
- [Type Alias Result](https://docs.nvidia.com/nemo/relay/v0.5.0/reference/api/rust-library-reference/nemo-relay-plugin/type-result.md): Result type used by the Rust native plugin SDK.