> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/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 diagnostics

> Bounded, process-local diagnostic evidence, independent of logger startup.

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`.

Bounded, process-local diagnostic evidence, independent of logger startup.

Startup composition chooses collection once. Disabled handles skip lazy work; enabled components reserve summaries before recording. Recent evidence uses a shared circular history and a reclaimable detail pool. Neither history loss nor output delivery changes accepted numeric totals. Diagnostic evidence never assigns readiness, recovery, or deployment health.

The backing-storage budget excludes caller-owned inputs, producer handles, independently decoded snapshot copies, allocator overhead, and user callback captures. Existing operational output and legacy reports have separate budgets.

## Startup and recording

Select settings once before giving producers their handles. Install the chosen context with [`Diagnostics::install_process_default`](/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-diagnostics) before using convenience constructors, or inject it explicitly into logging and plugin composition. Neither path requires logging to initialize first.

```rust
use nemo_relay::diagnostics::*;

let diagnostics = Diagnostics::from_settings(
    SourceIdentity {
        instance_id: uuid::Uuid::now_v7(),
        process_id: Some(std::process::id()),
        process_role: "embedded".into(),
        relay_version: env!("CARGO_PKG_VERSION").into(),
    },
    DiagnosticsSettings { enabled: true, ..Default::default() },
)?;
let code = BuiltinDiagnosticCode::Failure(FailureCode::Logging(LoggingFailureCode::SinkWriteFailed));
let recorder = diagnostics.register_component(ComponentRegistration::new("example", &[code]))?;
recorder.record_lazy(|| Observation::new(
    Classification::failure(FailureCode::Logging(LoggingFailureCode::SinkWriteFailed), FailureClass::Io)
        .expect("supported catalogue pair"),
    "Producer-approved safe detail",
    std::num::NonZeroU64::MIN, // occurrence delta, never a cumulative total
))?;
let page = diagnostics.snapshot(&DiagnosticQuery::default())?;
let bounded_json: &[u8] = page.as_bytes();
```

Disabled contexts use the same producer calls and skip their lazy factories; reads return [`DiagnosticError::Disabled`](/reference/api/rust-library-reference/nemo-relay/diagnostics/enum-diagnosticerror). Held snapshot leases use a reserved query workspace until dropped. Decoding [`SnapshotLease::to_snapshot`](/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-snapshotlease) instead creates an independent caller-owned DTO outside the service's memory budget.

## Re-exports

* `pub use classifiers::PluginErrorClassifier;`

## Modules

* [classifiers](/reference/api/rust-library-reference/nemo-relay/diagnostics/classifiers): Producer-owned pure mappings from existing typed errors to catalogue values. Pure classification for the integrated plugin-operation producer.
* [embedded](/reference/api/rust-library-reference/nemo-relay/diagnostics/embedded): Configuration-driven service and bounded copies for embedded language runtimes. Configuration-driven embedded service and bounded language-adapter copies.

## Structs

* [Classification](/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-classification): Shared classification payload for producers, projections, and decoded evidence.
* [ClassificationError](/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-classificationerror): A cause is missing, forbidden, or unsupported by the selected catalogue code.
* [ComponentIdentity](/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-componentidentity): Identity of one registered component within a diagnostic source.
* [ComponentMemoryFootprint](/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-componentmemoryfootprint): Assigned diagnostic storage for one component incarnation, not its heap or RSS.
* [ComponentMemoryUsage](/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-componentmemoryusage): One retained registration's diagnostic backing.
* [ComponentMemoryView](/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-componentmemoryview): Borrowed component row from copied query storage. Never borrows live history.
* [ComponentOwner](/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-componentowner): Restricted lifecycle capability returned only to the registration owner.
* [ComponentOwnership](/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-componentownership): Bounded attribution for a component refresh or an originating observation.
* [ComponentRecorder](/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-componentrecorder): Producer capability scoped to one admitted registration.
* [ComponentRegistration](/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-componentregistration): Expected codes and attribution are admitted together with the summary.
* [ComponentSnapshot](/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-componentsnapshot): One retained row per component registration instance.
* [ComponentView](/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-componentview): Borrowed view of a component copied into a query workspace.
* [DiagnosticCapability](/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-diagnosticcapability): Capability coverage, including explicitly deferred producer integrations.
* [DiagnosticCorrelation](/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-diagnosticcorrelation): Optional caller correlation identifiers, excluded from aggregation keys.
* [DiagnosticCount](/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-diagnosticcount): Magnitude of an occurrence or loss counter, including overflow visibility.
* [DiagnosticCounter](/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-diagnosticcounter): Lifetime occurrences for one code in its containing component instance.
* [DiagnosticCoverage](/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-diagnosticcoverage): Explicit evidence, retention, saturation, and producer integration coverage.
* [DiagnosticCursor](/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-diagnosticcursor): Opaque continuation bound to source, capture revision, offsets, and scope.
* [DiagnosticDetail](/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-diagnosticdetail): Restricted optional recent evidence, independent of the accepted numeric summary.
* [DiagnosticDiscovery](/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-diagnosticdiscovery): Side-effect-free discovery, available even when snapshot queries are disabled.
* [DiagnosticEvent](/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-diagnosticevent): One recent observation with its actual class and original configuration attribution.
* [DiagnosticLifetimeSummary](/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-diagnosticlifetimesummary): Fixed lifetime totals and monotonic timing for a context or component instance.
* [DiagnosticLimits](/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-diagnosticlimits): Independent capacities of one diagnostic context. All backing allocations are admitted during startup; these limits are not a whole-process RSS ceiling.
* [DiagnosticLoss](/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-diagnosticloss): Source loss state reserved independently of optional evidence capacity.
* [DiagnosticMemoryPage](/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-diagnosticmemorypage): Bounded independent memory view; inspection neither records nor freezes history.
* [DiagnosticMemoryUsage](/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-diagnosticmemoryusage): Backing capacity and current occupancy of one context.
* [DiagnosticNumber](/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-diagnosticnumber): Unsigned diagnostic integer serialized losslessly as a decimal string.
* [DiagnosticOrigin](/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-diagnosticorigin): Original bounded configuration attribution carried by one observation.
* [DiagnosticOutputSummary](/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-diagnosticoutputsummary): Allowlisted operational output, constructed independently of retained detail.
* [DiagnosticProducerSupport](/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-diagnosticproducersupport): One finite integration entry. Support is independent of collection enablement, configured/admitted registrations, observed evidence, and read authority.
* [DiagnosticQuery](/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-diagnosticquery): Portable bounded selection; consumers never reset or mutate evidence.
* [DiagnosticRefreshSummary](/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-diagnosticrefreshsummary): One current resettable counting period, with no retained historical summary.
* [DiagnosticRetention](/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-diagnosticretention): Boundaries of returned retained evidence, separate from cumulative counters.
* [DiagnosticSnapshot](/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-diagnosticsnapshot): Read evidence from one source incarnation, using the canonical snapshot schema.
* [DiagnosticTotals](/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-diagnostictotals): Fixed numeric accounting for one explicitly identified lifetime or refresh scope.
* [DiagnosticWindow](/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-diagnosticwindow): Fixed-resolution outcome series for the containing component instance.
* [DiagnosticWindowBucket](/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-diagnosticwindowbucket): An aggregate bucket using component-relative elapsed time, never raw process ticks.
* [DiagnosticWindowCoverage](/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-diagnosticwindowcoverage): Actual observation interval and limitations of a fixed-bucket window.
* [Diagnostics](/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-diagnostics): Independent diagnostics context with immutable startup enablement.
* [DiagnosticsReader](/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-diagnosticsreader): Read capability for one context, without recording or lifecycle authority.
* [DiagnosticsSettings](/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-diagnosticssettings): Startup-only runtime setting. Collection is compiled normally and off unless the owner enables this context explicitly.
* [EntryMemoryFootprint](/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-entrymemoryfootprint): Occupied backing for one retained observation; these quantities overlap.
* [EntryMemoryUsage](/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-entrymemoryusage): One retained entry, identified within the enclosing source incarnation.
* [EntryMemoryView](/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-entrymemoryview): Borrowed retained-entry footprint from copied query storage, without its text.
* [EventView](/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-eventview): Borrowed view of an event copied into a query workspace.
* [ExtensionClassHandle](/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-extensionclasshandle): An admitted custom cause descriptor belonging to one registered extension. Its immutable metadata is bounded and does not create another counter series.
* [ExtensionHandle](/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-extensionhandle): A registered extension identity. A stale handle cannot create a new code.
* [ExtensionRegistration](/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-extensionregistration): Extension vocabulary is scoped to a producer namespace and admitted once.
* [MemoryInspectionLease](/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-memoryinspectionlease): Memory inspection holds the same bounded permit as an ordinary snapshot. Borrowed iterators refer only to the copied page; dropping releases all storage.
* [MemoryLimitEvent](/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-memorylimitevent): One cumulative environment limit event.
* [MemorySelectionTotals](/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-memoryselectiontotals): Whole-selection totals, distinct from the rows present in this page.
* [Observation](/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-observation): One observation. Its count is a positive input delta, never a cumulative total.
* [OriginRecorder](/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-originrecorder): An operation's bounded original configuration attribution.
* [PluginExecutionName](/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-pluginexecutionname): A plugin execution mechanism name, preserving values unknown to this reader. Typed conversion accepts only the corresponding catalogue enum.
* [PluginObservationContext](/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-pluginobservationcontext): Shared plugin-operation facts for producers, projections, and decoded evidence.
* [PluginPhaseName](/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-pluginphasename): A plugin lifecycle phase name, preserving values unknown to this reader. Typed conversion accepts only the corresponding catalogue enum.
* [ProjectionGuard](/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-projectionguard): Bounded projection subscription, or inert disabled-mode handle.
* [RecordReceipt](/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-recordreceipt): Accepted lifetime and current-summary update.
* [RemoteDiagnosticOrigin](/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-remotediagnosticorigin): Fixed-size provenance retained by an authorized ingestion adapter.
* [ResourceMemoryMeasurement](/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-resourcememorymeasurement): One available measurement; an absent field means not reported (unsupported or unreadable).
* [ResourceMemoryMetrics](/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-resourcememorymetrics): Memory-only projection; fixed fields and eight limit slots bound all copies.
* [ResourceMemorySample](/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-resourcememorysample): Collection identity and memory values, copied without an unbounded retained graph.
* [ResourceMemoryView](/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-resourcememoryview): Independent resource result joined after diagnostic capture releases its lock.
* [ResourceProcessIdentity](/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-resourceprocessidentity): Verified root incarnation from the same collection, never PID alone.
* [SnapshotLease](/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-snapshotlease): A bounded serialized page. Dropping the lease returns its workspace permit; it owns copied bytes and never pins retained history or a component lease.
* [SourceIdentity](/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-sourceidentity): Identity of one Relay process or explicitly owned runtime incarnation.
* [WindowSettings](/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-windowsettings): Fixed-duration component outcome windows; no code/class Cartesian product.

## Enums

* [BuiltinDiagnosticCode](/reference/api/rust-library-reference/nemo-relay/diagnostics/enum-builtindiagnosticcode): Fixed-size canonical authoring value with one authoritative hierarchy.
* [CliFailureCode](/reference/api/rust-library-reference/nemo-relay/diagnostics/enum-clifailurecode): Failures at integrated CLI operation boundaries; causes come from producers.
* [CommonPluginFailureCode](/reference/api/rust-library-reference/nemo-relay/diagnostics/enum-commonpluginfailurecode): Plugin failures supported by phase-one activation recording.
* [DaemonFailureCode](/reference/api/rust-library-reference/nemo-relay/diagnostics/enum-daemonfailurecode): Failures observed by daemon operation owners, independent of health policy.
* [DiagnosticAvailability](/reference/api/rust-library-reference/nemo-relay/diagnostics/enum-diagnosticavailability): Availability of evidence, without applying deployment or application health.
* [DiagnosticDetailRef](/reference/api/rust-library-reference/nemo-relay/diagnostics/enum-diagnosticdetailref): Borrowed producer-approved detail. A Display source is formatted into capped storage only when the enabled recorder invokes its lazy observation factory.
* [DiagnosticDomain](/reference/api/rust-library-reference/nemo-relay/diagnostics/enum-diagnosticdomain): Top-level owning subsystem, derived from its catalogue code.
* [DiagnosticError](/reference/api/rust-library-reference/nemo-relay/diagnostics/enum-diagnosticerror): Validation, admission, or availability failure, independent of operational logging.
* [DiagnosticOutcome](/reference/api/rust-library-reference/nemo-relay/diagnostics/enum-diagnosticoutcome): Observed operation outcome; severity does not imply this value.
* [DiagnosticReadReason](/reference/api/rust-library-reference/nemo-relay/diagnostics/enum-diagnosticreadreason): Stable reasons shared by canonical snapshot adapters. These are operation results, never a source health classification or a producer failure code. Include a fallback arm when matching: future releases can add reasons.
* [DiagnosticSeverity](/reference/api/rust-library-reference/nemo-relay/diagnostics/enum-diagnosticseverity): Severity of evidence, independent of an operation's outcome.
* [DiagnosticSummaryScope](/reference/api/rust-library-reference/nemo-relay/diagnostics/enum-diagnosticsummaryscope): Scope of summary and outcome-window values in a filtered response.
* [EvidenceDisposition](/reference/api/rust-library-reference/nemo-relay/diagnostics/enum-evidencedisposition): Evidence retention is independent of numeric acceptance.
* [FailureClass](/reference/api/rust-library-reference/nemo-relay/diagnostics/enum-failureclass): Supported general cause, independent of health, retries, and operation outcome.
* [FailureCode](/reference/api/rust-library-reference/nemo-relay/diagnostics/enum-failurecode): Failure event hierarchy for integrated producers.
* [LoggingFailureCode](/reference/api/rust-library-reference/nemo-relay/diagnostics/enum-loggingfailurecode): Initial Logging failure vocabulary.
* [MemoryFieldScope](/reference/api/rust-library-reference/nemo-relay/diagnostics/enum-memoryfieldscope): Field-level scope; snapshot scope does not relabel system/environment data.
* [NoticeCode](/reference/api/rust-library-reference/nemo-relay/diagnostics/enum-noticecode): Bounded non-failure observations; they never acquire a failure class.
* [PluginDiagnosticFamily](/reference/api/rust-library-reference/nemo-relay/diagnostics/enum-plugindiagnosticfamily): Semantic family of related plugin diagnostic codes.
* [PluginExecution](/reference/api/rust-library-reference/nemo-relay/diagnostics/enum-pluginexecution): Producer-authored plugin execution mechanism, excluded from counter identity.
* [PluginFailureCode](/reference/api/rust-library-reference/nemo-relay/diagnostics/enum-pluginfailurecode): Plugin failure hierarchy for integrated producers.
* [PluginOperationFailureCode](/reference/api/rust-library-reference/nemo-relay/diagnostics/enum-pluginoperationfailurecode): Failures at observed dynamic-plugin operation boundaries.
* [PluginPhase](/reference/api/rust-library-reference/nemo-relay/diagnostics/enum-pluginphase): Observed plugin lifecycle phase or policy-gate context, independent of classification.
* [ProjectionError](/reference/api/rust-library-reference/nemo-relay/diagnostics/enum-projectionerror): Subscriber conversion or delivery failure after canonical acceptance.
* [RecordOutcome](/reference/api/rust-library-reference/nemo-relay/diagnostics/enum-recordoutcome): Accepted collection or intentional disablement.
* [ResourceAssociation](/reference/api/rust-library-reference/nemo-relay/diagnostics/enum-resourceassociation): Relationship between the diagnostic process and measured target.
* [ResourceMemoryAvailability](/reference/api/rust-library-reference/nemo-relay/diagnostics/enum-resourcememoryavailability): Availability of the latest-memory projection, independent of diagnostic reads.
* [ResourceMemoryNumber](/reference/api/rust-library-reference/nemo-relay/diagnostics/enum-resourcememorynumber): Exact integers and finite converted decimals retain distinct numeric kinds.
* [ResourceMemoryUnit](/reference/api/rust-library-reference/nemo-relay/diagnostics/enum-resourcememoryunit): Original unit family and canonical unit. Inspection performs no conversion.
* [ResourceSampleStream](/reference/api/rust-library-reference/nemo-relay/diagnostics/enum-resourcesamplestream): Independent baseline series producing this sample.
* [SuccessCode](/reference/api/rust-library-reference/nemo-relay/diagnostics/enum-successcode): Explicit successful operations; successes do not recover or clear failures.

## Constants

* [DIAGNOSTIC_CATALOGUE_VERSION](/reference/api/rust-library-reference/nemo-relay/diagnostics/constant-diagnostic-catalogue-version): Stable typed-catalogue revision, independent of the envelope version.
* [DIAGNOSTIC_DISCOVERY_VERSION](/reference/api/rust-library-reference/nemo-relay/diagnostics/constant-diagnostic-discovery-version): Version of the side-effect-free discovery contract.
* [DIAGNOSTIC_MEMORY_VERSION](/reference/api/rust-library-reference/nemo-relay/diagnostics/constant-diagnostic-memory-version): Initial version of the separate memory inspection envelope.
* [DIAGNOSTIC_SCHEMA_VERSION](/reference/api/rust-library-reference/nemo-relay/diagnostics/constant-diagnostic-schema-version): Initial version of the canonical diagnostic snapshot envelope.
* [MAX_DIAGNOSTIC_QUERY_BYTES](/reference/api/rust-library-reference/nemo-relay/diagnostics/constant-max-diagnostic-query-bytes): Maximum canonical UTF-8 query size, before JSON parsing. HTTP applies this ceiling to the encoded URI query as well. Native helpers also bound conversion.

## Traits

* [DiagnosticClassifier](/reference/api/rust-library-reference/nemo-relay/diagnostics/trait-diagnosticclassifier): Pure producer behavior: borrow original evidence and return shared classification metadata.

## Functions

* [decode_diagnostic_query](/reference/api/rust-library-reference/nemo-relay/diagnostics/fn-decode-diagnostic-query): Decode an optional schema selector and the shared query. Unknown selectors, duplicate fields (including nested ones), noncanonical numbers, and excessive nesting fail safely. No file lookup, service startup, or snapshot lease occurs.

## Type Aliases

* [DiagnosticObservation](/reference/api/rust-library-reference/nemo-relay/diagnostics/type-diagnosticobservation): Explicit authoring name for a borrowed observation.
* [ObservationTime](/reference/api/rust-library-reference/nemo-relay/diagnostics/type-observationtime): UTC wall-clock time when the source observed evidence or captured a snapshot.

> Bounded, process-local diagnostic evidence, independent of logger startup.

## Docs

- [Module classifiers](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/classifiers.md): Producer-owned pure mappings from existing typed errors to catalogue values. Pure classification for the integrated plugin-operation producer.
- [Struct Plugin Error Classifier](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/classifiers/struct-pluginerrorclassifier.md): Plugin-operation mapping before errors are flattened into reports or SDK strings.
- [Module embedded](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/embedded.md): Configuration-driven service and bounded copies for embedded language runtimes. Configuration-driven embedded service and bounded language-adapter copies.
- [Struct Embedded Diagnostic Info](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/embedded/struct-embeddeddiagnosticinfo.md): Independent budgets and coverage of the binding adapter; excludes language object overhead and caller-retained copies, and is not an RSS measurement.
- [Struct Embedded Diagnostic Page](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/embedded/struct-embeddeddiagnosticpage.md): Adapter-owned page payload. Its permit is returned deterministically on drop. Foreign results are caller-owned copies and must never retain this object.
- [Struct Embedded Diagnostics Reader](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/embedded/struct-embeddeddiagnosticsreader.md): Read-only embedded capability. Clones share the service's copy admission pool. Debug output deliberately contains no snapshot, query, or restricted detail.
- [Enum Embedded Diagnostic Error](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/embedded/enum-embeddeddiagnosticerror.md): Stable service/reader failure. Messages never contain retained evidence or query input.
- [Constant BINDING_COPY_CONCURRENCY](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/embedded/constant-binding-copy-concurrency.md): Independent simultaneous page-copy/foreign-conversion budget per service.
- [Constant DIAGNOSTIC_QUERY_INTEGER_FIELDS](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/embedded/constant-diagnostic-query-integer-fields.md): Query fields whose canonical JSON value is a lossless unsigned integer. Binding adapters use this descriptor when accepting native integer inputs.
- [Constant MAX_BINDING_QUERY_BYTES](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/embedded/constant-max-binding-query-bytes.md): Maximum encoded query accepted by an embedded reader, before JSON parsing.
- [Function decode_query](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/embedded/fn-decode-query.md): Decode bounded input without copying an unbounded foreign query graph.
- [Function reader](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/embedded/fn-reader.md): Obtain an inspection capability without initializing the service or logger. The service is selected by ordinary plugin-host initialization configuration.
- [Struct Classification](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-classification.md): Shared classification payload for producers, projections, and decoded evidence.
- [Struct Classification Error](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-classificationerror.md): A cause is missing, forbidden, or unsupported by the selected catalogue code.
- [Struct Component Identity](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-componentidentity.md): Identity of one registered component within a diagnostic source.
- [Struct Component Memory Footprint](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-componentmemoryfootprint.md): Assigned diagnostic storage for one component incarnation, not its heap or RSS.
- [Struct Component Memory Usage](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-componentmemoryusage.md): One retained registration's diagnostic backing.
- [Struct Component Memory View](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-componentmemoryview.md): Borrowed component row from copied query storage. Never borrows live history.
- [Struct Component Owner](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-componentowner.md): Restricted lifecycle capability returned only to the registration owner.
- [Struct Component Ownership](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-componentownership.md): Bounded attribution for a component refresh or an originating observation.
- [Struct Component Recorder](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-componentrecorder.md): Producer capability scoped to one admitted registration.
- [Struct Component Registration](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-componentregistration.md): Expected codes and attribution are admitted together with the summary.
- [Struct Component Snapshot](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-componentsnapshot.md): One retained row per component registration instance.
- [Struct Component View](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-componentview.md): Borrowed view of a component copied into a query workspace.
- [Struct Diagnostic Capability](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-diagnosticcapability.md): Capability coverage, including explicitly deferred producer integrations.
- [Struct Diagnostic Correlation](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-diagnosticcorrelation.md): Optional caller correlation identifiers, excluded from aggregation keys.
- [Struct Diagnostic Count](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-diagnosticcount.md): Magnitude of an occurrence or loss counter, including overflow visibility.
- [Struct Diagnostic Counter](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-diagnosticcounter.md): Lifetime occurrences for one code in its containing component instance.
- [Struct Diagnostic Coverage](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-diagnosticcoverage.md): Explicit evidence, retention, saturation, and producer integration coverage.
- [Struct Diagnostic Cursor](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-diagnosticcursor.md): Opaque continuation bound to source, capture revision, offsets, and scope.
- [Struct Diagnostic Detail](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-diagnosticdetail.md): Restricted optional recent evidence, independent of the accepted numeric summary.
- [Struct Diagnostic Discovery](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-diagnosticdiscovery.md): Side-effect-free discovery, available even when snapshot queries are disabled.
- [Struct Diagnostic Event](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-diagnosticevent.md): One recent observation with its actual class and original configuration attribution.
- [Struct Diagnostic Lifetime Summary](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-diagnosticlifetimesummary.md): Fixed lifetime totals and monotonic timing for a context or component instance.
- [Struct Diagnostic Limits](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-diagnosticlimits.md): Independent capacities of one diagnostic context. All backing allocations are admitted during startup; these limits are not a whole-process RSS ceiling.
- [Struct Diagnostic Loss](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-diagnosticloss.md): Source loss state reserved independently of optional evidence capacity.
- [Struct Diagnostic Memory Page](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-diagnosticmemorypage.md): Bounded independent memory view; inspection neither records nor freezes history.
- [Struct Diagnostic Memory Usage](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-diagnosticmemoryusage.md): Backing capacity and current occupancy of one context.
- [Struct Diagnostic Number](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-diagnosticnumber.md): Unsigned diagnostic integer serialized losslessly as a decimal string.
- [Struct Diagnostic Origin](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-diagnosticorigin.md): Original bounded configuration attribution carried by one observation.
- [Struct Diagnostic Output Summary](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-diagnosticoutputsummary.md): Allowlisted operational output, constructed independently of retained detail.
- [Struct Diagnostic Producer Support](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-diagnosticproducersupport.md): One finite integration entry. Support is independent of collection enablement, configured/admitted registrations, observed evidence, and read authority.
- [Struct Diagnostic Query](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-diagnosticquery.md): Portable bounded selection; consumers never reset or mutate evidence.
- [Struct Diagnostic Refresh Summary](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-diagnosticrefreshsummary.md): One current resettable counting period, with no retained historical summary.
- [Struct Diagnostic Retention](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-diagnosticretention.md): Boundaries of returned retained evidence, separate from cumulative counters.
- [Struct Diagnostic Snapshot](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-diagnosticsnapshot.md): Read evidence from one source incarnation, using the canonical snapshot schema.
- [Struct Diagnostic Totals](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-diagnostictotals.md): Fixed numeric accounting for one explicitly identified lifetime or refresh scope.
- [Struct Diagnostic Window](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-diagnosticwindow.md): Fixed-resolution outcome series for the containing component instance.
- [Struct Diagnostic Window Bucket](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-diagnosticwindowbucket.md): An aggregate bucket using component-relative elapsed time, never raw process ticks.
- [Struct Diagnostic Window Coverage](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-diagnosticwindowcoverage.md): Actual observation interval and limitations of a fixed-bucket window.
- [Struct Diagnostics](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-diagnostics.md): Independent diagnostics context with immutable startup enablement.
- [Struct Diagnostics Reader](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-diagnosticsreader.md): Read capability for one context, without recording or lifecycle authority.
- [Struct Diagnostics Settings](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-diagnosticssettings.md): Startup-only runtime setting. Collection is compiled normally and off unless the owner enables this context explicitly.
- [Struct Entry Memory Footprint](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-entrymemoryfootprint.md): Occupied backing for one retained observation; these quantities overlap.
- [Struct Entry Memory Usage](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-entrymemoryusage.md): One retained entry, identified within the enclosing source incarnation.
- [Struct Entry Memory View](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-entrymemoryview.md): Borrowed retained-entry footprint from copied query storage, without its text.
- [Struct Event View](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-eventview.md): Borrowed view of an event copied into a query workspace.
- [Struct Extension Class Handle](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-extensionclasshandle.md): An admitted custom cause descriptor belonging to one registered extension. Its immutable metadata is bounded and does not create another counter series.
- [Struct Extension Handle](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-extensionhandle.md): A registered extension identity. A stale handle cannot create a new code.
- [Struct Extension Registration](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-extensionregistration.md): Extension vocabulary is scoped to a producer namespace and admitted once.
- [Struct Memory Inspection Lease](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-memoryinspectionlease.md): Memory inspection holds the same bounded permit as an ordinary snapshot. Borrowed iterators refer only to the copied page; dropping releases all storage.
- [Struct Memory Limit Event](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-memorylimitevent.md): One cumulative environment limit event.
- [Struct Memory Selection Totals](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-memoryselectiontotals.md): Whole-selection totals, distinct from the rows present in this page.
- [Struct Observation](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-observation.md): One observation. Its count is a positive input delta, never a cumulative total.
- [Struct Origin Recorder](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-originrecorder.md): An operation's bounded original configuration attribution.
- [Struct Plugin Execution Name](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-pluginexecutionname.md): A plugin execution mechanism name, preserving values unknown to this reader. Typed conversion accepts only the corresponding catalogue enum.
- [Struct Plugin Observation Context](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-pluginobservationcontext.md): Shared plugin-operation facts for producers, projections, and decoded evidence.
- [Struct Plugin Phase Name](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-pluginphasename.md): A plugin lifecycle phase name, preserving values unknown to this reader. Typed conversion accepts only the corresponding catalogue enum.
- [Struct Projection Guard](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-projectionguard.md): Bounded projection subscription, or inert disabled-mode handle.
- [Struct Record Receipt](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-recordreceipt.md): Accepted lifetime and current-summary update.
- [Struct Remote Diagnostic Origin](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-remotediagnosticorigin.md): Fixed-size provenance retained by an authorized ingestion adapter.
- [Struct Resource Memory Measurement](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-resourcememorymeasurement.md): One available measurement; an absent field means not reported (unsupported or unreadable).
- [Struct Resource Memory Metrics](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-resourcememorymetrics.md): Memory-only projection; fixed fields and eight limit slots bound all copies.
- [Struct Resource Memory Sample](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-resourcememorysample.md): Collection identity and memory values, copied without an unbounded retained graph.
- [Struct Resource Memory View](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-resourcememoryview.md): Independent resource result joined after diagnostic capture releases its lock.
- [Struct Resource Process Identity](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-resourceprocessidentity.md): Verified root incarnation from the same collection, never PID alone.
- [Struct Snapshot Lease](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-snapshotlease.md): A bounded serialized page. Dropping the lease returns its workspace permit; it owns copied bytes and never pins retained history or a component lease.
- [Struct Source Identity](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-sourceidentity.md): Identity of one Relay process or explicitly owned runtime incarnation.
- [Struct Window Settings](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/struct-windowsettings.md): Fixed-duration component outcome windows; no code/class Cartesian product.
- [Enum Builtin Diagnostic Code](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/enum-builtindiagnosticcode.md): Fixed-size canonical authoring value with one authoritative hierarchy.
- [Enum CliFailure Code](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/enum-clifailurecode.md): Failures at integrated CLI operation boundaries; causes come from producers.
- [Enum Common Plugin Failure Code](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/enum-commonpluginfailurecode.md): Plugin failures supported by phase-one activation recording.
- [Enum Daemon Failure Code](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/enum-daemonfailurecode.md): Failures observed by daemon operation owners, independent of health policy.
- [Enum Diagnostic Availability](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/enum-diagnosticavailability.md): Availability of evidence, without applying deployment or application health.
- [Enum Diagnostic Detail Ref](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/enum-diagnosticdetailref.md): Borrowed producer-approved detail. A Display source is formatted into capped storage only when the enabled recorder invokes its lazy observation factory.
- [Enum Diagnostic Domain](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/enum-diagnosticdomain.md): Top-level owning subsystem, derived from its catalogue code.
- [Enum Diagnostic Error](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/enum-diagnosticerror.md): Validation, admission, or availability failure, independent of operational logging.
- [Enum Diagnostic Outcome](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/enum-diagnosticoutcome.md): Observed operation outcome; severity does not imply this value.
- [Enum Diagnostic Read Reason](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/enum-diagnosticreadreason.md): Stable reasons shared by canonical snapshot adapters. These are operation results, never a source health classification or a producer failure code. Include a fallback arm when matching: future releases can add reasons.
- [Enum Diagnostic Severity](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/enum-diagnosticseverity.md): Severity of evidence, independent of an operation's outcome.
- [Enum Diagnostic Summary Scope](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/enum-diagnosticsummaryscope.md): Scope of summary and outcome-window values in a filtered response.
- [Enum Evidence Disposition](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/enum-evidencedisposition.md): Evidence retention is independent of numeric acceptance.
- [Enum Failure Class](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/enum-failureclass.md): Supported general cause, independent of health, retries, and operation outcome.
- [Enum Failure Code](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/enum-failurecode.md): Failure event hierarchy for integrated producers.
- [Enum Logging Failure Code](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/enum-loggingfailurecode.md): Initial Logging failure vocabulary.
- [Enum Memory Field Scope](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/enum-memoryfieldscope.md): Field-level scope; snapshot scope does not relabel system/environment data.
- [Enum Notice Code](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/enum-noticecode.md): Bounded non-failure observations; they never acquire a failure class.
- [Enum Plugin Diagnostic Family](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/enum-plugindiagnosticfamily.md): Semantic family of related plugin diagnostic codes.
- [Enum Plugin Execution](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/enum-pluginexecution.md): Producer-authored plugin execution mechanism, excluded from counter identity.
- [Enum Plugin Failure Code](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/enum-pluginfailurecode.md): Plugin failure hierarchy for integrated producers.
- [Enum Plugin Operation Failure Code](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/enum-pluginoperationfailurecode.md): Failures at observed dynamic-plugin operation boundaries.
- [Enum Plugin Phase](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/enum-pluginphase.md): Observed plugin lifecycle phase or policy-gate context, independent of classification.
- [Enum Projection Error](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/enum-projectionerror.md): Subscriber conversion or delivery failure after canonical acceptance.
- [Enum Record Outcome](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/enum-recordoutcome.md): Accepted collection or intentional disablement.
- [Enum Resource Association](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/enum-resourceassociation.md): Relationship between the diagnostic process and measured target.
- [Enum Resource Memory Availability](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/enum-resourcememoryavailability.md): Availability of the latest-memory projection, independent of diagnostic reads.
- [Enum Resource Memory Number](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/enum-resourcememorynumber.md): Exact integers and finite converted decimals retain distinct numeric kinds.
- [Enum Resource Memory Unit](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/enum-resourcememoryunit.md): Original unit family and canonical unit. Inspection performs no conversion.
- [Enum Resource Sample Stream](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/enum-resourcesamplestream.md): Independent baseline series producing this sample.
- [Enum Success Code](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/enum-successcode.md): Explicit successful operations; successes do not recover or clear failures.
- [Constant DIAGNOSTIC_CATALOGUE_VERSION](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/constant-diagnostic-catalogue-version.md): Stable typed-catalogue revision, independent of the envelope version.
- [Constant DIAGNOSTIC_DISCOVERY_VERSION](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/constant-diagnostic-discovery-version.md): Version of the side-effect-free discovery contract.
- [Constant DIAGNOSTIC_MEMORY_VERSION](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/constant-diagnostic-memory-version.md): Initial version of the separate memory inspection envelope.
- [Constant DIAGNOSTIC_SCHEMA_VERSION](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/constant-diagnostic-schema-version.md): Initial version of the canonical diagnostic snapshot envelope.
- [Constant MAX_DIAGNOSTIC_QUERY_BYTES](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/constant-max-diagnostic-query-bytes.md): Maximum canonical UTF-8 query size, before JSON parsing. HTTP applies this ceiling to the encoded URI query as well. Native helpers also bound conversion.
- [Trait Diagnostic Classifier](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/trait-diagnosticclassifier.md): Pure producer behavior: borrow original evidence and return shared classification metadata.
- [Function decode_diagnostic_query](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/fn-decode-diagnostic-query.md): Decode an optional schema selector and the shared query. Unknown selectors, duplicate fields (including nested ones), noncanonical numbers, and excessive nesting fail safely. No file lookup, service startup, or snapshot lease occurs.
- [Type Alias Diagnostic Observation](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/type-diagnosticobservation.md): Explicit authoring name for a borrowed observation.
- [Type Alias Observation Time](https://docs.nvidia.com/nemo/relay/v0.11.0/reference/api/rust-library-reference/nemo-relay/diagnostics/type-observationtime.md): UTC wall-clock time when the source observed evidence or captured a snapshot.