feat(observability): promote selected Event metadata to OTel attributes - #802
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WalkthroughOpenTelemetry now validates metadata-promotion prefixes and copies selected Event metadata into OTLP attributes. The change covers span and mark processing, endpoint configuration, FFI construction, and Go, Node.js, and Python bindings. ChangesMetadata promotion
Estimated code review effort: 4 (Complex) | ~60 minutes Merge Risk: 🔵 Low · up to The opt-in metadata promotion leaves existing output unchanged by default. Merge is reasonable with explicit owner follow-up for the public configuration contract, documentation accuracy, and required helper documentation; the bounded risks are configuration misunderstandings and future contract drift rather than an immediate production failure. Sequence Diagram(s)sequenceDiagram
participant Client
participant Binding
participant FFI
participant OpenTelemetrySubscriber
participant OTLPExporter
Client->>Binding: configure metadata prefixes
Binding->>FFI: pass JSON prefix array
FFI->>OpenTelemetrySubscriber: validate and apply prefixes
OpenTelemetrySubscriber->>OpenTelemetrySubscriber: promote Event metadata
OpenTelemetrySubscriber->>OTLPExporter: export OTLP attributes
Possibly related PRs
🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
✨ Finishing Touches🧪 Generate unit tests (beta)
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In `@crates/core/src/observability/plugin_component.rs`:
- Around line 737-742: Add coverage in assert_trace_endpoint_editor_schema for
promote_metadata_prefixes, asserting it uses EditorFieldKind::List and has the
expected optional flag. Keep the existing schema assertions unchanged.
In `@crates/core/tests/unit/observability/attribute_projection_tests.rs`:
- Around line 182-198: Extend the attribute projection tests around the existing
values map assertions to inspect typed OpenTelemetry values directly, covering
string, boolean, and numeric array variants. Add cases for empty, mixed-type,
nested, null, and oversized unsigned arrays, and assert the expected handling or
rejection for each while preserving the existing scalar and issue assertions.
In `@crates/core/tests/unit/observability/otel_tests.rs`:
- Around line 495-556: Add test cases alongside
promotes_final_scope_and_mark_metadata_without_duplicate_span_keys for both
orphan marks and MarkProjection::Tool marks, asserting promoted metadata appears
on the resulting standalone/tool-projection spans without duplicate keys and
remains isolated from unrelated spans. Exercise both OpenTelemetryType variants
consistently with the existing test.
In `@python/tests/test_observability_plugin.py`:
- Line 140: Extend the relevant observability plugin test to configure a
non-empty promote_metadata_prefixes value and assert that the serialized output
preserves or applies that configured prefix, while retaining the existing
empty-list coverage.
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crates/core/src/observability/mod.rscrates/core/src/observability/otel.rscrates/core/src/observability/plugin_component.rscrates/core/tests/unit/observability/attribute_projection_tests.rscrates/core/tests/unit/observability/openinference_tests.rscrates/core/tests/unit/observability/otel_tests.rscrates/core/tests/unit/observability/plugin_component_tests.rscrates/ffi/nemo_relay.hcrates/ffi/src/api/observability.rscrates/ffi/tests/unit/api/plugin_tests.rscrates/node/observability.d.tscrates/node/observability.jscrates/node/src/api/mod.rscrates/node/tests/observability_plugin_tests.mjscrates/node/tests/otel_tests.mjscrates/python/src/py_types/observability.rsgo/nemo_relay/nemo_relay.gogo/nemo_relay/observability_plugin.gogo/nemo_relay/observability_plugin_test.gogo/nemo_relay/otel_test.gopython/nemo_relay/_native.pyipython/nemo_relay/observability.pypython/nemo_relay/observability.pyipython/tests/test_observability_plugin.pypython/tests/test_types.py
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and the full matrix across Rust, Python, Go, and Node.js.
Files:
crates/ffi/tests/unit/api/plugin_tests.rscrates/core/tests/unit/observability/plugin_component_tests.rscrates/node/src/api/mod.rscrates/python/src/py_types/observability.rscrates/core/tests/unit/observability/openinference_tests.rscrates/core/src/observability/plugin_component.rscrates/ffi/src/api/observability.rscrates/core/tests/unit/observability/otel_tests.rscrates/core/tests/unit/observability/attribute_projection_tests.rscrates/core/src/observability/mod.rscrates/core/src/observability/otel.rs
crates/ffi/**/*.rs
📄 CodeRabbit inference engine (.agents/skills/test-go-binding/SKILL.md)
If the change touched
crates/ffi, also usetest-ffi-surfacefor validation
Files:
crates/ffi/tests/unit/api/plugin_tests.rscrates/ffi/src/api/observability.rs
**/*.{rs,c,h}
📄 CodeRabbit inference engine (CONTRIBUTING.md)
Use the naming conventions appropriate to each language: Rust
snake_case, C FFI exports prefixednemo_relay_, GoPascalCase, Node.jscamelCase, Pythonsnake_case.
Files:
crates/ffi/tests/unit/api/plugin_tests.rscrates/ffi/nemo_relay.hcrates/core/tests/unit/observability/plugin_component_tests.rscrates/node/src/api/mod.rscrates/python/src/py_types/observability.rscrates/core/tests/unit/observability/openinference_tests.rscrates/core/src/observability/plugin_component.rscrates/ffi/src/api/observability.rscrates/core/tests/unit/observability/otel_tests.rscrates/core/tests/unit/observability/attribute_projection_tests.rscrates/core/src/observability/mod.rscrates/core/src/observability/otel.rs
**/*.{rs,toml}
📄 CodeRabbit inference engine (.agents/skills/prepare-pr/SKILL.md)
**/*.{rs,toml}: - [ ] Any Rust change ranjust test-rust
- Any Rust change ran
cargo fmt --all- Any Rust change ran
cargo clippy --workspace --all-targets -- -D warningsIf any Rust code changed, always run
just test-rust.
Files:
crates/ffi/tests/unit/api/plugin_tests.rscrates/core/tests/unit/observability/plugin_component_tests.rscrates/node/src/api/mod.rscrates/python/src/py_types/observability.rscrates/core/tests/unit/observability/openinference_tests.rscrates/core/src/observability/plugin_component.rscrates/ffi/src/api/observability.rscrates/core/tests/unit/observability/otel_tests.rscrates/core/tests/unit/observability/attribute_projection_tests.rscrates/core/src/observability/mod.rscrates/core/src/observability/otel.rs
**/*.{rs,h,c,cc,cpp}
📄 CodeRabbit inference engine (.agents/skills/validate-change/SKILL.md)
Use
test-ffi-surface.
Files:
crates/ffi/tests/unit/api/plugin_tests.rscrates/ffi/nemo_relay.hcrates/core/tests/unit/observability/plugin_component_tests.rscrates/node/src/api/mod.rscrates/python/src/py_types/observability.rscrates/core/tests/unit/observability/openinference_tests.rscrates/core/src/observability/plugin_component.rscrates/ffi/src/api/observability.rscrates/core/tests/unit/observability/otel_tests.rscrates/core/tests/unit/observability/attribute_projection_tests.rscrates/core/src/observability/mod.rscrates/core/src/observability/otel.rs
crates/ffi/nemo_relay.h
📄 CodeRabbit inference engine (.agents/skills/test-ffi-surface/SKILL.md)
Check the generated header diff when any exported symbol or type changed in the FFI surface
Update generated or generated-from-build surfaces such as
crates/ffi/nemo_relay.hthrough the proper build step.
Files:
crates/ffi/nemo_relay.h
crates/core/**/*.rs
📄 CodeRabbit inference engine (.agents/skills/test-go-binding/SKILL.md)
If the change touched
crates/coreor shared runtime semantics, also usevalidate-changefor broader validation
Files:
crates/core/tests/unit/observability/plugin_component_tests.rscrates/core/tests/unit/observability/openinference_tests.rscrates/core/src/observability/plugin_component.rscrates/core/tests/unit/observability/otel_tests.rscrates/core/tests/unit/observability/attribute_projection_tests.rscrates/core/src/observability/mod.rscrates/core/src/observability/otel.rs
crates/{core,adaptive,plugin,worker,worker-proto,types}/**/*.{rs,toml}
📄 CodeRabbit inference engine (.agents/skills/test-rust-core/SKILL.md)
For changes in the Rust core, adaptive, dynamic plugin, worker, worker-proto, or types crates, run
cargo fmt --all,just test-rust, andcargo clippy --workspace --all-targets -- -D warningsas the default validation sequence.
Files:
crates/core/tests/unit/observability/plugin_component_tests.rscrates/core/tests/unit/observability/openinference_tests.rscrates/core/src/observability/plugin_component.rscrates/core/tests/unit/observability/otel_tests.rscrates/core/tests/unit/observability/attribute_projection_tests.rscrates/core/src/observability/mod.rscrates/core/src/observability/otel.rs
crates/{core,adaptive,plugin,worker,worker-proto,types}/**/*
📄 CodeRabbit inference engine (.agents/skills/test-rust-core/SKILL.md)
crates/{core,adaptive,plugin,worker,worker-proto,types}/**/*: For changes affectingcrates/core,crates/adaptive, or shared Rust runtime semantics, expand validation to the full binding matrix withvalidate-change.
Use narrower crate-specific tests only as a local debug loop, not as the final validation for a Rust change.
If a public API, event shape, middleware behavior, plugin semantics, orcrates/core/crates/adaptivebehavior changes, also runvalidate-change.
If the change is isolated to one binding wrapper while Rust semantics remain unchanged, prefer that binding's build/test skill instead.
Files:
crates/core/tests/unit/observability/plugin_component_tests.rscrates/core/tests/unit/observability/openinference_tests.rscrates/core/src/observability/plugin_component.rscrates/core/tests/unit/observability/otel_tests.rscrates/core/tests/unit/observability/attribute_projection_tests.rscrates/core/src/observability/mod.rscrates/core/src/observability/otel.rs
crates/{core,adaptive}/**/*
📄 CodeRabbit inference engine (.agents/skills/test-rust-core/SKILL.md)
For shared-semantics or broad runtime changes in the core or adaptive crates, run
just ci=true test-rust.
crates/coreorcrates/adaptivechanges ran the full language matrix
Files:
crates/core/tests/unit/observability/plugin_component_tests.rscrates/core/tests/unit/observability/openinference_tests.rscrates/core/src/observability/plugin_component.rscrates/core/tests/unit/observability/otel_tests.rscrates/core/tests/unit/observability/attribute_projection_tests.rscrates/core/src/observability/mod.rscrates/core/src/observability/otel.rs
crates/{core,adaptive}/**/*.rs
⚙️ CodeRabbit configuration file
crates/{core,adaptive}/**/*.rs: Review the Rust runtime for async correctness, scope isolation, middleware ordering, and event lifecycle regressions.
Pay close attention to task-local/thread-local scope propagation, callback lifetimes, stream finalization, and root_uuid isolation.
Public API changes should preserve existing behavior unless tests and docs show the intended migration path.
Files:
crates/core/tests/unit/observability/plugin_component_tests.rscrates/core/tests/unit/observability/openinference_tests.rscrates/core/src/observability/plugin_component.rscrates/core/tests/unit/observability/otel_tests.rscrates/core/tests/unit/observability/attribute_projection_tests.rscrates/core/src/observability/mod.rscrates/core/src/observability/otel.rs
crates/node/src/**/*.rs
📄 CodeRabbit inference engine (.agents/skills/add-binding-feature/SKILL.md)
- Node.js binding in
crates/node/src/api/mod.rs
Files:
crates/node/src/api/mod.rs
go/nemo_relay/**/*.go
📄 CodeRabbit inference engine (.agents/skills/test-go-binding/SKILL.md)
go/nemo_relay/**/*.go: Format changed Go packages withcd go/nemo_relay && go fmt ./...
Run Go tests withjust test-goto build and test the NeMo Relay Go binding
Usejust build-gowhen you want an explicit build-only pass or need the artifact for other work
Usejust ci=true test-gowhen you need the CI-style coverage and JUnit path
On macOS, setDYLD_LIBRARY_PATHto the../../target/releasedirectory before running the rawgo testcommand directly
Files:
go/nemo_relay/observability_plugin_test.gogo/nemo_relay/observability_plugin.gogo/nemo_relay/otel_test.gogo/nemo_relay/nemo_relay.go
go/nemo_relay/**
📄 CodeRabbit inference engine (.agents/skills/maintain-optimizer/SKILL.md)
Keep shared plugin helpers in
go/nemo_relayaligned with plugin registration, composition, and lifecycle behavior.
Files:
go/nemo_relay/observability_plugin_test.gogo/nemo_relay/observability_plugin.gogo/nemo_relay/otel_test.gogo/nemo_relay/nemo_relay.go
**/*.go
📄 CodeRabbit inference engine (CONTRIBUTING.md)
**/*.go: Formatting:gofmt
Static analysis:go vet ./...| Go |
PascalCase|nemo_relay.ToolCall|
Files:
go/nemo_relay/observability_plugin_test.gogo/nemo_relay/observability_plugin.gogo/nemo_relay/otel_test.gogo/nemo_relay/nemo_relay.go
go/nemo_relay/*.go
📄 CodeRabbit inference engine (.agents/skills/add-binding-feature/SKILL.md)
- Go wrapper in
go/nemo_relay/nemo_relay.gowith doc comment
Files:
go/nemo_relay/observability_plugin_test.gogo/nemo_relay/observability_plugin.gogo/nemo_relay/otel_test.gogo/nemo_relay/nemo_relay.go
go/**/*.go
📄 CodeRabbit inference engine (.agents/skills/validate-change/SKILL.md)
Use
test-go-binding.
Files:
go/nemo_relay/observability_plugin_test.gogo/nemo_relay/observability_plugin.gogo/nemo_relay/otel_test.gogo/nemo_relay/nemo_relay.go
go/nemo_relay/**/*
⚙️ CodeRabbit configuration file
go/nemo_relay/**/*: Review Go binding changes for cgo memory ownership, race safety, callback cleanup, idiomatic exported APIs, and parity with Rust/FFI behavior.
Any API change should include focused Go tests and consider race-test behavior.
Files:
go/nemo_relay/observability_plugin_test.gogo/nemo_relay/observability_plugin.gogo/nemo_relay/otel_test.gogo/nemo_relay/nemo_relay.go
crates/python/**/*.rs
📄 CodeRabbit inference engine (.agents/skills/test-python-binding/SKILL.md)
crates/python/**/*.rs: When Rust files change as part of Python work, runcargo fmt --all,just test-rust, andcargo clippy --workspace --all-targets -- -D warnings.
When the native Rust bridge changes, add and run the Rust crate tests fornemo-relay-python, includingcargo test -p nemo-relay-python.
Files:
crates/python/src/py_types/observability.rs
crates/python/src/**/*.rs
📄 CodeRabbit inference engine (.agents/skills/add-binding-feature/SKILL.md)
- Python native binding in
crates/python/src/py_api/mod.rs
Files:
crates/python/src/py_types/observability.rs
crates/core/src/**/*.rs
📄 CodeRabbit inference engine (.agents/skills/add-binding-feature/SKILL.md)
crates/core/src/**/*.rs: 1. Core Rust
Implement the behavior first incrates/core/src/api/and
related core modules such ascrates/core/src/api/runtime/,
crates/core/src/codec/, orcrates/core/src/json.rs.
| Rust |snake_case|nemo_relay_tool_call|
Files:
crates/core/src/observability/plugin_component.rscrates/core/src/observability/mod.rscrates/core/src/observability/otel.rs
python/nemo_relay/*.py
📄 CodeRabbit inference engine (.agents/skills/add-binding-feature/SKILL.md)
- Python wrapper with docstring in
python/nemo_relay/<module>.py
Files:
python/nemo_relay/observability.py
crates/ffi/src/**/*.rs
📄 CodeRabbit inference engine (.agents/skills/add-binding-feature/SKILL.md)
crates/ffi/src/**/*.rs: 2. FFI / shared C surface
Add or update FFI wrappers in the relevantcrates/ffi/src/api/*.rs
module, re-export them throughcrates/ffi/src/api/mod.rs, and ensure the
generatedcrates/ffi/nemo_relay.hstays correct.
Files:
crates/ffi/src/api/observability.rs
crates/ffi/src/api/**/*.rs
📄 CodeRabbit inference engine (.agents/skills/add-binding-feature/SKILL.md)
crates/ffi/src/api/**/*.rs: - [ ] FFI wrapper in the relevantcrates/ffi/src/api/*.rsmodule and
re-export incrates/ffi/src/api/mod.rs
Files:
crates/ffi/src/api/observability.rs
crates/core/src/observability/{atif,otel,openinference}.rs
📄 CodeRabbit inference engine (.agents/skills/maintain-observability/SKILL.md)
crates/core/src/observability/{atif,otel,openinference}.rs: -crates/core/src/observability/atif.rs
crates/core/src/observability/otel.rscrates/core/src/observability/openinference.rs
Files:
crates/core/src/observability/otel.rs
🧠 Learnings (12)
📚 Learning: 2026-08-12T17:13:14.808Z
Learnt from: SandyChapman
Repo: NVIDIA/NeMo-Relay PR: 755
File: python/tests/integrations/langchain_tests/test_callbacks_scope_stack.py:185-185
Timestamp: 2026-08-12T17:13:14.808Z
Learning: In Python files, do not report Ruff UP017 findings unless pyproject.toml enables the UP rule set or the individual file explicitly enables UP017. The repository currently enables Ruff rule sets E, F, W, and I only.
Applied to files:
python/tests/test_observability_plugin.pypython/nemo_relay/observability.pypython/tests/test_types.py
📚 Learning: 2026-05-07T18:04:44.387Z
Learnt from: mnajafian-nv
Repo: NVIDIA/NeMo-Flow PR: 67
File: integrations/openclaw/src/modules.ts:1-2
Timestamp: 2026-05-07T18:04:44.387Z
Learning: In NVIDIA/NeMo-Flow, TypeScript source files should use `//` line comments for SPDX headers (e.g., `// SPDX-FileCopyrightText: ...` and `// SPDX-License-Identifier: ...`) rather than C-style block comments (`/* ... */`). The repo’s copyright checker enforces this mapping, so `//` SPDX headers in `.ts` files should not be flagged as a style violation.
Applied to files:
crates/node/observability.d.ts
📚 Learning: 2026-07-14T02:53:55.471Z
Learnt from: willkill07
Repo: NVIDIA/NeMo-Relay PR: 414
File: crates/node/observability.d.ts:61-61
Timestamp: 2026-07-14T02:53:55.471Z
Learning: In `crates/node/observability.d.ts` and `crates/node/observability.js`, treat `OtlpConfig`/`otlpConfig` and related helpers as an intentional mirror of the snake_case TOML/plugin configuration schema consumed by `plugin.initialize()`. Do not apply the usual “Node.js public APIs use camelCase” naming review expectation to this plugin-config schema surface. Instead, camelCase review expectations should apply to the native binding surface (e.g., `OpenTelemetrySubscriber`/`OpenInferenceSubscriber` constructors and their `attributeMappings`), which expose camelCase separately.
Applied to files:
crates/node/observability.d.tscrates/node/observability.js
📚 Learning: 2026-08-03T19:55:03.931Z
Learnt from: afourniernv
Repo: NVIDIA/NeMo-Relay PR: 558
File: crates/pii-redaction/src/rampart/mod.rs:265-274
Timestamp: 2026-08-03T19:55:03.931Z
Learning: In NeMo Relay first-party plugin registration helpers, treat the documented duplicate-registration `PluginError::RegistrationFailed` result from `register_plugin` as success when registration is intended to be idempotent. Do not locally reclassify this as `PluginError::Conflict`; changing the classification requires a core-wide review of the public API and FFI behavior.
Applied to files:
crates/ffi/tests/unit/api/plugin_tests.rscrates/core/tests/unit/observability/plugin_component_tests.rscrates/node/src/api/mod.rscrates/python/src/py_types/observability.rscrates/core/tests/unit/observability/openinference_tests.rscrates/core/src/observability/plugin_component.rscrates/ffi/src/api/observability.rscrates/core/tests/unit/observability/otel_tests.rscrates/core/tests/unit/observability/attribute_projection_tests.rscrates/core/src/observability/mod.rscrates/core/src/observability/otel.rs
📚 Learning: 2026-07-14T02:53:44.529Z
Learnt from: willkill07
Repo: NVIDIA/NeMo-Relay PR: 414
File: crates/node/tests/observability_plugin_tests.mjs:34-34
Timestamp: 2026-07-14T02:53:44.529Z
Learning: Do not flag camelCase style violations for keys returned by observability plugin configuration helpers (e.g., `observability.otlpConfig()` and similar helpers like `atofConfig()` / `atifConfig()`) in the Node observability module and its tests. These helpers intentionally return the snake_case plugin configuration schema consumed by `plugin.initialize()` and written/read via TOML. This is distinct from the Node public API / native subscriber options (e.g., fields like `attributeMappings`) which follow the camelCase guideline; only the plugin-config schema helpers should be exempt.
Applied to files:
crates/node/observability.jscrates/node/tests/observability_plugin_tests.mjs
📚 Learning: 2026-08-03T17:55:34.521Z
Learnt from: afourniernv
Repo: NVIDIA/NeMo-Relay PR: 558
File: crates/node/pii_rampart.js:50-59
Timestamp: 2026-08-03T17:55:34.521Z
Learning: In Node.js helper modules under `crates/node`, use `ComponentSpec` as the public component-wrapper API name, including for wrappers such as `plugin`, `adaptive`, `observability`, `model_pricing`, `pii_redaction`, and equivalent modules like `pii_rampart`. This established API name takes precedence over the general camelCase public API guideline for consistency.
Applied to files:
crates/node/observability.js
📚 Learning: 2026-08-13T22:55:06.939Z
Learnt from: bbednarski9
Repo: NVIDIA/NeMo-Relay PR: 780
File: crates/core/tests/unit/observability/otel_logs_tests.rs:48-61
Timestamp: 2026-08-13T22:55:06.939Z
Learning: In NVIDIA/NeMo-Relay OTLP observability tests, do not require plugin diagnostic fields for direct LogEventProcessor or metric-subscriber helper coverage, because those helpers intentionally omit plugin diagnostics. Assert runtime diagnostic fields only through activated-plugin coverage, where endpoint-specific diagnostic fields are available.
Applied to files:
crates/core/tests/unit/observability/plugin_component_tests.rscrates/core/tests/unit/observability/openinference_tests.rscrates/core/tests/unit/observability/otel_tests.rscrates/core/tests/unit/observability/attribute_projection_tests.rs
📚 Learning: 2026-07-28T23:57:11.641Z
Learnt from: willkill07
Repo: NVIDIA/NeMo-Relay PR: 570
File: crates/node/src/api/mod.rs:3265-3282
Timestamp: 2026-07-28T23:57:11.641Z
Learning: In the Node.js binding, `flushSubscribers()` is Promise-based/async and must be awaited. Any session-close or teardown path (e.g., the OpenClaw live smoke session-close flow) must await `flushSubscribers()` before continuing to live ATIF export assertions and before teardown, so queued subscriber delivery fully completes and tests/assertions observe the final state.
Applied to files:
crates/node/src/api/mod.rs
📚 Learning: 2026-07-28T20:33:25.156Z
Learnt from: willkill07
Repo: NVIDIA/NeMo-Relay PR: 572
File: go/nemo_relay/adaptive_runtime_test.go:214-238
Timestamp: 2026-07-28T20:33:25.156Z
Learning: When adding/adjusting Go unit tests for `BuildCacheRequestFacts` (request-ID validation and related request parsing), set `CacheRequestFactsInput.Provider` to a valid provider in all tests that are intended to isolate request-ID behavior—because `BuildCacheRequestFacts` does not validate `Provider`. Then add separate test coverage for malformed `AnnotatedRequest` JSON so JSON parsing failures are not conflated with `Provider`-related inputs.
Applied to files:
go/nemo_relay/observability_plugin_test.gogo/nemo_relay/otel_test.go
📚 Learning: 2026-07-28T20:07:29.880Z
Learnt from: willkill07
Repo: NVIDIA/NeMo-Relay PR: 571
File: crates/core/src/api/runtime/state.rs:996-1020
Timestamp: 2026-07-28T20:07:29.880Z
Learning: In NeMo Relay (RELAY-509), sanitizer callback failures must be treated as intentional fail-open behavior. When an event/tool (request/response) or LLM (request/response) sanitizer callback fails, the sanitizer chain should retain and publish the last valid event/payload snapshot (rather than dropping/invalidating the data) and log the failure including callback context (e.g., which sanitizer/callback failed and relevant identifiers). Apply this consistently across all sanitizer chains mentioned in the RELAY-509 documentation/migration guide.
Applied to files:
crates/core/src/observability/plugin_component.rscrates/core/src/observability/mod.rscrates/core/src/observability/otel.rs
📚 Learning: 2026-08-13T21:50:26.925Z
Learnt from: bbednarski9
Repo: NVIDIA/NeMo-Relay PR: 780
File: crates/core/src/observability/otel_metrics.rs:0-0
Timestamp: 2026-08-13T21:50:26.925Z
Learning: Within the observability Rust modules, keep signal-generic helpers such as `build_grpc_metadata`, `record_signal_runtime_diagnostic`, and `resolve_http_signal_endpoint` in `otel_signal`. The `otel_logs`, `otel_metrics`, and plugin-routing consumers should depend on these shared helpers without introducing a metrics-to-logs module dependency.
Applied to files:
crates/core/src/observability/plugin_component.rscrates/core/src/observability/mod.rscrates/core/src/observability/otel.rs
📚 Learning: 2026-08-15T00:46:41.611Z
Learnt from: CR
Repo: NVIDIA/NeMo-Relay PR: 0
File: .agents/skills/add-binding-feature/SKILL.md:0-0
Timestamp: 2026-08-15T00:46:41.611Z
Learning: Applies to crates/ffi/src/**/*.rs : 2. **FFI / shared C surface**
Add or update FFI wrappers in the relevant `crates/ffi/src/api/*.rs`
module, re-export them through `crates/ffi/src/api/mod.rs`, and ensure the
generated `crates/ffi/nemo_relay.h` stays correct.
Applied to files:
crates/ffi/src/api/observability.rs
🪛 golangci-lint (2.12.2)
go/nemo_relay/observability_plugin.go
[error] 68-68: undefined: OpenTelemetryType
(typecheck)
[error] 72-72: undefined: OtlpAttributeMapping
(typecheck)
🔇 Additional comments (36)
crates/node/observability.d.ts (1)
75-75: LGTM!python/nemo_relay/observability.py (1)
235-246: LGTM!python/nemo_relay/observability.pyi (1)
98-98: LGTM!go/nemo_relay/nemo_relay.go (1)
269-269: LGTM!Also applies to: 2237-2267, 2327-2329, 2394-2416
go/nemo_relay/observability_plugin.go (1)
68-85: LGTM!Also applies to: 333-344
go/nemo_relay/observability_plugin_test.go (1)
78-78: LGTM!Also applies to: 166-169
go/nemo_relay/otel_test.go (1)
69-71: LGTM!Also applies to: 82-99, 210-263
crates/node/observability.js (1)
74-75: LGTM!crates/node/src/api/mod.rs (1)
301-302: LGTM!Also applies to: 4558-4559
crates/node/tests/observability_plugin_tests.mjs (1)
54-54: LGTM!crates/node/tests/otel_tests.mjs (1)
7-7: LGTM!Also applies to: 52-52, 104-112, 135-143, 154-164
crates/python/src/py_types/observability.rs (1)
493-494: LGTM!Also applies to: 539-547, 569-569
python/nemo_relay/_native.pyi (1)
1120-1120: LGTM!python/tests/test_types.py (1)
711-711: LGTM!Also applies to: 723-730, 745-749, 792-804, 813-821
crates/core/src/observability/mod.rs (1)
339-380: LGTM!Also applies to: 531-674
crates/core/tests/unit/observability/attribute_projection_tests.rs (1)
8-12: LGTM!Also applies to: 201-242
crates/core/src/observability/otel.rs (1)
36-39: LGTM!Also applies to: 152-154, 207-229, 392-401, 426-436, 493-507, 538-538, 571-631, 1031-1047, 1153-1180, 1242-1276, 1345-1363, 1421-1466, 1479-1513
crates/core/tests/unit/observability/openinference_tests.rs (1)
798-798: LGTM!crates/core/tests/unit/observability/otel_tests.rs (1)
1091-1091: LGTM!crates/core/src/observability/plugin_component.rs (7)
73-73: LGTM!
326-328: LGTM!
2966-2967: LGTM!
3202-3202: LGTM!
3222-3222: LGTM!
3334-3334: LGTM!
3555-3566: LGTM!crates/core/tests/unit/observability/plugin_component_tests.rs (5)
773-773: LGTM!
960-960: LGTM!
988-988: LGTM!
1349-1378: LGTM!
1458-1477: LGTM!crates/ffi/nemo_relay.h (1)
1709-1732: LGTM!crates/ffi/src/api/observability.rs (3)
671-691: LGTM!
895-915: LGTM!
917-987: LGTM!crates/ffi/tests/unit/api/plugin_tests.rs (1)
1528-1587: LGTM!
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if we are going to do the language bindings async from this PR, we might want to include docs in this PR to make sure that lands for the configuration changes in time for 0.8.0 |
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Two notes on the promotion logic itself. Separately tracking the failing Codecov statuses and the missing endpoint docs.
Signed-off-by: Eric Evans <194135482+ericevans-nv@users.noreply.github.com>
Signed-off-by: Eric Evans <194135482+ericevans-nv@users.noreply.github.com>
Document Scope-end metadata as authoritative and verify that unsupported final values omit the promoted attribute instead of restoring a stale Scope-start value. Signed-off-by: Eric Evans <194135482+ericevans-nv@users.noreply.github.com>
Signed-off-by: Eric Evans <194135482+ericevans-nv@users.noreply.github.com>
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Inline comments:
In `@docs/configure-plugins/observability/opentelemetry.mdx`:
- Around line 146-154: Update the promote_metadata_prefixes documentation to
state that promotion supports primitive scalar values and homogeneous primitive
arrays, while unsupported metadata values are omitted. Document that invalid
prefixes such as "nv.*" fail endpoint validation with
observability.unsupported_value, replacing the implication that all sanitized
metadata is promotable or that invalid configuration is handled only through an
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**/*
📄 CodeRabbit inference engine (CONTRIBUTING.md)
**/*: Every commit in a pull request must include a Developer Certificate of Origin sign-off.
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UseSONAR_IGNORE_START/SONAR_IGNORE_ENDonly for documented false
positives that cannot be resolved in code or by improving the analyzer
configuration.
Keep the ignored block as small as possible, add a brief comment
explaining why the suppression is needed, and call it out in the PR description
so reviewers can explicitly sign off on it.
Keep the first line under 72 characters. Use the body for additional context when the change is not self-explanatory.
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Relevant tests passed under
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Pull request title follows Conventional Commit style and uses the correct
type
Use Conventional Commit style for PR titles:
Only check the contribution confirmation boxes when they are true. If either
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**/*: Tool execution callbacks and each execution-interceptnextcontinuation
return the canonicalToolExecutionResult { result, annotation }. A forwarding
intercept must preserve both fields inToolExecutionInterceptOutcome; Relay
retainspending_marksseparately.
Tool sanitize-response guardrails receive
onlyresult.
- Registration and duplicate-name behavior
- Deregistration and no-op missing-name behavior
- Ordering by priority
- Callback failure policy, including fail-open behavior when required
- Scope-local registration, inheritance, and cleanup on pop
- Parity coverage in every affected binding
**/*: Keep NeMo Relay optional
Use stable, documented framework or plugin APIs
Wrap tool and LLM paths at the correct framework boundary
Preserve the framework's original behavior when NeMo Relay is absent
Integration uses public framework or plugin A...
Files:
python/nemo_relay/_native.pyipython/tests/test_observability_plugin.pycrates/ffi/nemo_relay.hcrates/node/src/api/mod.rscrates/core/tests/unit/observability/otel_tests.rscrates/core/tests/unit/observability/plugin_component_tests.rsdocs/configure-plugins/observability/opentelemetry.mdxcrates/core/tests/unit/observability/attribute_projection_tests.rscrates/core/src/observability/mod.rscrates/core/src/observability/otel.rsgo/nemo_relay/nemo_relay.go
**/*.{py,pyi}
📄 CodeRabbit inference engine (.agents/skills/add-binding-feature/SKILL.md)
**/*.{py,pyi}: 3. Language-native bindings
Update Python, Go, and Node.js for every surface that should expose the
capability.
| Python |snake_case|nemo_relay.tools.call|
Files:
python/nemo_relay/_native.pyipython/tests/test_observability_plugin.py
**/*.{rs,py,pyi,go,js,ts}
📄 CodeRabbit inference engine (.agents/skills/add-binding-feature/SKILL.md)
**/*.{rs,py,pyi,go,js,ts}: 6. Validation
Run the validation matrix from thevalidate-changeskill for the affected
surfaces.
- Tests added in every affected language surface
Files:
python/nemo_relay/_native.pyipython/tests/test_observability_plugin.pycrates/node/src/api/mod.rscrates/core/tests/unit/observability/otel_tests.rscrates/core/tests/unit/observability/plugin_component_tests.rscrates/core/tests/unit/observability/attribute_projection_tests.rscrates/core/src/observability/mod.rscrates/core/src/observability/otel.rsgo/nemo_relay/nemo_relay.go
python/nemo_relay/*.pyi
📄 CodeRabbit inference engine (.agents/skills/add-binding-feature/SKILL.md)
- Python type stubs updated in the relevant
python/nemo_relay/*.pyimodules
Files:
python/nemo_relay/_native.pyi
python/nemo_relay/**/*
⚙️ CodeRabbit configuration file
python/nemo_relay/**/*: Review Python wrapper changes for typed API consistency, contextvars-based scope isolation, async behavior, and parity with the native extension.
Stubs and runtime implementations should stay aligned.
Files:
python/nemo_relay/_native.pyi
python/**/*.py
📄 CodeRabbit inference engine (.agents/skills/test-python-binding/SKILL.md)
python/**/*.py: Format changed Python wrapper and test files withuv run ruff format python python/plugin.
Runuv run ruff format python python/pluginafter changing Python wrapper or test files.
Files:
python/tests/test_observability_plugin.py
python/tests/**/*.py
📄 CodeRabbit inference engine (.agents/skills/test-python-binding/SKILL.md)
python/tests/**/*.py: Use pytest to run Python tests.
Do not add@pytest.mark.asyncioto tests; async tests are automatically detected by the async runner.
Do not add a-> Nonereturn type annotation to test functions.
When mocking a class, useunittest.mock.MagicMockorunittest.mock.AsyncMock, usingspecwhen necessary, rather than defining a new class.
Prefix mocked class names withmock, notfake.
Prefer pytest fixtures over helper methods.
If a fixture is needed in multiple test files, define it in aconftest.pyfile instead of repeating it.
Define fixtures using@pytest.fixture(name="<fixture_name>"[, scope="<scope>"])and a<fixture_name>_fixturefunction; specifyscopeonly when it is notfunction.
Preferpytest.mark.parametrizeover separate tests for different input types.
Run focused pytest tests first when the affected area is known, and run the full suite withjust test-pythonbefore review.
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Files:
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**/*.{rs,py}
📄 CodeRabbit inference engine (AGENTS.md)
Follow binding naming conventions: Rust and Python
snake_case, C FFI exports prefixednemo_relay_, GoPascalCasefor public APIs, Node.jscamelCase.
Files:
python/tests/test_observability_plugin.pycrates/node/src/api/mod.rscrates/core/tests/unit/observability/otel_tests.rscrates/core/tests/unit/observability/plugin_component_tests.rscrates/core/tests/unit/observability/attribute_projection_tests.rscrates/core/src/observability/mod.rscrates/core/src/observability/otel.rs
**/*.{rs,py,js,mjs,ts}
📄 CodeRabbit inference engine (AGENTS.md)
Keep async behavior on the existing tokio-based model. Bindings should preserve callback and future lifetimes rather than blocking or hiding async work unexpectedly.
Files:
python/tests/test_observability_plugin.pycrates/node/src/api/mod.rscrates/core/tests/unit/observability/otel_tests.rscrates/core/tests/unit/observability/plugin_component_tests.rscrates/core/tests/unit/observability/attribute_projection_tests.rscrates/core/src/observability/mod.rscrates/core/src/observability/otel.rs
**/*.{rs,py,go,js,ts,html,md,mdx,toml}
📄 CodeRabbit inference engine (CONTRIBUTING.md)
All source files must include an SPDX license header.
Files:
python/tests/test_observability_plugin.pycrates/node/src/api/mod.rscrates/core/tests/unit/observability/otel_tests.rscrates/core/tests/unit/observability/plugin_component_tests.rsdocs/configure-plugins/observability/opentelemetry.mdxcrates/core/tests/unit/observability/attribute_projection_tests.rscrates/core/src/observability/mod.rscrates/core/src/observability/otel.rsgo/nemo_relay/nemo_relay.go
**/*.py
📄 CodeRabbit inference engine (CONTRIBUTING.md)
**/*.py: Linting: Ruff with rule setsE,F,W,I
Formatting: Ruff formatter (line length 120, double quotes)
Type checking: tyUse
test-python-binding.
Files:
python/tests/test_observability_plugin.py
**/*.{rs,py,go,js,ts}
📄 CodeRabbit inference engine (CONTRIBUTING.md)
**/*.{rs,py,go,js,ts}: Run tests for every language affected by your changes. If your change touches the core Rust crate, run tests across all bindings since they all depend on it.
When adding new functionality, include tests in the appropriate test files for each affected language binding.
**/*.{rs,py,go,js,ts}: - [ ] Do all bindings expose the same logical knobs and semantics?
- Does every OpenTelemetry endpoint require a type and nonblank destination?
- Does each endpoint resolve
header_envvalues at activation and reject
missing, blank, or duplicate headers?- Are OpenTelemetry and OpenInference dependencies unconditional rather
than Cargo feature-gated?- Does
enable_full_payloadspreserve complete sanitized LLM request input
and annotations while leaving credential removal and sanitizers active?- Does Relay derive compliant trace and span IDs consistently across typed
OpenTelemetry endpoints while preserving lifecycle parentage?- Are mark events, start/end events, and orphan cases still handled correctly?
- Do examples and docs use each exporter's documented flush/deregister
order before shutdown?- Run the affected Rust crate tests plus
just test-rustif event
fields changed.- Run
just test-python,just test-go, andjust test-nodewhen
binding-native config or lifecycle changed.
Files:
python/tests/test_observability_plugin.pycrates/node/src/api/mod.rscrates/core/tests/unit/observability/otel_tests.rscrates/core/tests/unit/observability/plugin_component_tests.rscrates/core/tests/unit/observability/attribute_projection_tests.rscrates/core/src/observability/mod.rscrates/core/src/observability/otel.rsgo/nemo_relay/nemo_relay.go
{crates,python}/**/*.{rs,py}
📄 CodeRabbit inference engine (.agents/skills/maintain-dynamic-plugins/SKILL.md)
Rust and Python SDKs expose every supported registration surface.
Files:
python/tests/test_observability_plugin.pycrates/node/src/api/mod.rscrates/core/tests/unit/observability/otel_tests.rscrates/core/tests/unit/observability/plugin_component_tests.rscrates/core/tests/unit/observability/attribute_projection_tests.rscrates/core/src/observability/mod.rscrates/core/src/observability/otel.rs
**/*.{md,mdx,rs,py,go,js,ts}
📄 CodeRabbit inference engine (.agents/skills/maintain-observability/SKILL.md)
- Update docs and examples in the same branch.
Files:
python/tests/test_observability_plugin.pycrates/node/src/api/mod.rscrates/core/tests/unit/observability/otel_tests.rscrates/core/tests/unit/observability/plugin_component_tests.rsdocs/configure-plugins/observability/opentelemetry.mdxcrates/core/tests/unit/observability/attribute_projection_tests.rscrates/core/src/observability/mod.rscrates/core/src/observability/otel.rsgo/nemo_relay/nemo_relay.go
**/*.{py,rs,go,js,jsx,ts,tsx}
📄 CodeRabbit inference engine (.agents/skills/validate-change/SKILL.md)
**/*.{py,rs,go,js,jsx,ts,tsx}: If a language surface changed, always run that language's test target even when
Rust core did not change.
Files:
python/tests/test_observability_plugin.pycrates/node/src/api/mod.rscrates/core/tests/unit/observability/otel_tests.rscrates/core/tests/unit/observability/plugin_component_tests.rscrates/core/tests/unit/observability/attribute_projection_tests.rscrates/core/src/observability/mod.rscrates/core/src/observability/otel.rsgo/nemo_relay/nemo_relay.go
{crates/**/tests/**,python/tests/**,go/nemo_relay/**/*_test.go}
⚙️ CodeRabbit configuration file
{crates/**/tests/**,python/tests/**,go/nemo_relay/**/*_test.go}: Tests should cover the behavior promised by the changed API surface, including error paths and cross-request isolation where relevant.
Prefer assertions on lifecycle events, scope stacks, middleware ordering, and binding parity over shallow smoke tests.
Files:
python/tests/test_observability_plugin.pycrates/core/tests/unit/observability/otel_tests.rscrates/core/tests/unit/observability/plugin_component_tests.rscrates/core/tests/unit/observability/attribute_projection_tests.rs
crates/ffi/**
📄 CodeRabbit inference engine (.agents/skills/test-ffi-surface/SKILL.md)
Rebuild the FFI crate in release mode so the shared library and header stay in sync when making changes to crates/ffi
Files:
crates/ffi/nemo_relay.h
crates/ffi/nemo_relay.h
📄 CodeRabbit inference engine (.agents/skills/test-ffi-surface/SKILL.md)
Check the generated header diff when any exported symbol or type changed in the FFI surface
Update generated or generated-from-build surfaces such as
crates/ffi/nemo_relay.hthrough the proper build step.
Files:
crates/ffi/nemo_relay.h
**/*.{rs,c,h}
📄 CodeRabbit inference engine (CONTRIBUTING.md)
Use the naming conventions appropriate to each language: Rust
snake_case, C FFI exports prefixednemo_relay_, GoPascalCase, Node.jscamelCase, Pythonsnake_case.
Files:
crates/ffi/nemo_relay.hcrates/node/src/api/mod.rscrates/core/tests/unit/observability/otel_tests.rscrates/core/tests/unit/observability/plugin_component_tests.rscrates/core/tests/unit/observability/attribute_projection_tests.rscrates/core/src/observability/mod.rscrates/core/src/observability/otel.rs
**/*.{rs,h,c,cc,cpp}
📄 CodeRabbit inference engine (.agents/skills/validate-change/SKILL.md)
Use
test-ffi-surface.
Files:
crates/ffi/nemo_relay.hcrates/node/src/api/mod.rscrates/core/tests/unit/observability/otel_tests.rscrates/core/tests/unit/observability/plugin_component_tests.rscrates/core/tests/unit/observability/attribute_projection_tests.rscrates/core/src/observability/mod.rscrates/core/src/observability/otel.rs
crates/{python,ffi,node}/**/*
⚙️ CodeRabbit configuration file
crates/{python,ffi,node}/**/*: Treat binding changes as public API changes. Check for parity with the other language bindings, FFI ownership/lifetime safety,
callback error propagation, stable type conversion, and consistent async/stream semantics.
Flag changes that update one binding without corresponding tests or documentation for the same surface elsewhere.
Files:
crates/ffi/nemo_relay.hcrates/node/src/api/mod.rs
**/*.rs
📄 CodeRabbit inference engine (.agents/skills/test-ffi-surface/SKILL.md)
**/*.rs: Runcargo fmt --allfor all FFI work since it is Rust work
Runjust test-rustto validate FFI changes
Runcargo clippy --workspace --all-targets -- -D warningsto enforce strict linting on FFI workWhen Rust files changed as part of Go work, also run
cargo fmt --all,just test-rust, andcargo clippy --workspace --all-targets -- -D warnings
**/*.rs: Runcargo fmt --allwhen Rust files are changed as part of Node work
Runcargo clippy --workspace --all-targets -- -D warningswhen Rust files are changed as part of Node work
Runjust test-rustwhen Rust files are changed as part of Node work
**/*.rs: UseJson = serde_json::Valuein Rust-facing runtime APIs where the existing code expects JSON payloads.
UseResult<T>withFlowErrorin core runtime paths. Keep errors explicit and binding-appropriate at the wrapper layer.
**/*.rs: Formatting:cargo fmt(rustfmt defaults)
Linting:cargo clippy -- -D warnings-- all warnings are treated as errors
Dependency auditing:cargo deny check-- configured indeny.toml
**/*.rs: If any Rust code changed, also runcargo fmt --all.
If any Rust code changed, also runcargo clippy --workspace --all-targets -- -D warnings.
Usetest-rust-core. This always includesjust test-rust,
cargo fmt --all,cargo clippy --workspace --all-targets -- -D warnings,
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Files:
crates/node/src/api/mod.rscrates/core/tests/unit/observability/otel_tests.rscrates/core/tests/unit/observability/plugin_component_tests.rscrates/core/tests/unit/observability/attribute_projection_tests.rscrates/core/src/observability/mod.rscrates/core/src/observability/otel.rs
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📄 CodeRabbit inference engine (.agents/skills/prepare-pr/SKILL.md)
**/*.{rs,toml}: - [ ] Any Rust change ranjust test-rust
- Any Rust change ran
cargo fmt --all- Any Rust change ran
cargo clippy --workspace --all-targets -- -D warningsIf any Rust code changed, always run
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Files:
crates/node/src/api/mod.rscrates/core/tests/unit/observability/otel_tests.rscrates/core/tests/unit/observability/plugin_component_tests.rscrates/core/tests/unit/observability/attribute_projection_tests.rscrates/core/src/observability/mod.rscrates/core/src/observability/otel.rs
crates/node/src/**/*.rs
📄 CodeRabbit inference engine (.agents/skills/add-binding-feature/SKILL.md)
- Node.js binding in
crates/node/src/api/mod.rs
Files:
crates/node/src/api/mod.rs
crates/core/**/*.rs
📄 CodeRabbit inference engine (.agents/skills/test-go-binding/SKILL.md)
If the change touched
crates/coreor shared runtime semantics, also usevalidate-changefor broader validation
Files:
crates/core/tests/unit/observability/otel_tests.rscrates/core/tests/unit/observability/plugin_component_tests.rscrates/core/tests/unit/observability/attribute_projection_tests.rscrates/core/src/observability/mod.rscrates/core/src/observability/otel.rs
crates/{core,adaptive,plugin,worker,worker-proto,types}/**/*.{rs,toml}
📄 CodeRabbit inference engine (.agents/skills/test-rust-core/SKILL.md)
For changes in the Rust core, adaptive, dynamic plugin, worker, worker-proto, or types crates, run
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Files:
crates/core/tests/unit/observability/otel_tests.rscrates/core/tests/unit/observability/plugin_component_tests.rscrates/core/tests/unit/observability/attribute_projection_tests.rscrates/core/src/observability/mod.rscrates/core/src/observability/otel.rs
crates/{core,adaptive,plugin,worker,worker-proto,types}/**/*
📄 CodeRabbit inference engine (.agents/skills/test-rust-core/SKILL.md)
crates/{core,adaptive,plugin,worker,worker-proto,types}/**/*: For changes affectingcrates/core,crates/adaptive, or shared Rust runtime semantics, expand validation to the full binding matrix withvalidate-change.
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If a public API, event shape, middleware behavior, plugin semantics, orcrates/core/crates/adaptivebehavior changes, also runvalidate-change.
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Files:
crates/core/tests/unit/observability/otel_tests.rscrates/core/tests/unit/observability/plugin_component_tests.rscrates/core/tests/unit/observability/attribute_projection_tests.rscrates/core/src/observability/mod.rscrates/core/src/observability/otel.rs
crates/{core,adaptive}/**/*
📄 CodeRabbit inference engine (.agents/skills/test-rust-core/SKILL.md)
For shared-semantics or broad runtime changes in the core or adaptive crates, run
just ci=true test-rust.
crates/coreorcrates/adaptivechanges ran the full language matrix
Files:
crates/core/tests/unit/observability/otel_tests.rscrates/core/tests/unit/observability/plugin_component_tests.rscrates/core/tests/unit/observability/attribute_projection_tests.rscrates/core/src/observability/mod.rscrates/core/src/observability/otel.rs
crates/{core,adaptive}/**/*.rs
⚙️ CodeRabbit configuration file
crates/{core,adaptive}/**/*.rs: Review the Rust runtime for async correctness, scope isolation, middleware ordering, and event lifecycle regressions.
Pay close attention to task-local/thread-local scope propagation, callback lifetimes, stream finalization, and root_uuid isolation.
Public API changes should preserve existing behavior unless tests and docs show the intended migration path.
Files:
crates/core/tests/unit/observability/otel_tests.rscrates/core/tests/unit/observability/plugin_component_tests.rscrates/core/tests/unit/observability/attribute_projection_tests.rscrates/core/src/observability/mod.rscrates/core/src/observability/otel.rs
**/*.mdx
📄 CodeRabbit inference engine (.agents/skills/review-doc-style/SKILL.md)
MDX top-of-file SPDX comments must use {/* ... */} delimiters instead of HTML comment delimiters (Must-Fix)
**/*.mdx: In MDX files, top-of-file comments must use JSX comment delimiters:
{/*to open and*/}to close. Do not use HTML comments for MDX SPDX
headers.
New or regenerated MDX files use{/* ... */}for top-of-file SPDX comments
**/*.mdx: Usejust docsfor docs-site builds andjust docs-linkcheckwhen links
changed.
Files:
docs/configure-plugins/observability/opentelemetry.mdx
{docs,examples}/**/*
📄 CodeRabbit inference engine (.agents/skills/rename-surfaces/SKILL.md)
Update docs and examples.
Files:
docs/configure-plugins/observability/opentelemetry.mdx
**/*.{md,mdx,rst}
📄 CodeRabbit inference engine (.agents/skills/review-doc-style/assets/nvidia-style-technical-docs.md)
**/*.{md,mdx,rst}: Use title case consistently for technical documentation headings and table headers; avoid quotation marks, ampersands, and exclamation marks in headings, while preserving official product, event, research, and whitepaper title case.
Format code elements, commands, parameters, package names, expressions, directories, file names, and paths in monospace; represent path placeholders with angle brackets inside monospace.
Format UI buttons, menus, fields, and labels in bold, and separate consecutive UI navigation labels with>.
Use quotation marks for error messages and strings when appropriate, italics for newly introduced terms and publication titles, and plain text for keyboard shortcuts.
Represent GitHub repositories with owner/repository link text, such as[NVIDIA/NeMo](link), rather than generic repository wording.
Introduce every code block with a complete sentence; do not let a code block complete or interrupt the grammar of surrounding prose; use syntax highlighting when supported.
Keep inline method, function, and class references consistent with nearby documentation; omit empty parentheses in prose when no call is shown.
Use descriptive link text matching the destination title when possible; avoid raw URLs, generic anchors, long-sentence links, and unnecessary links that distract from procedures.
Ensure lists have a complete lead-in sentence, more than one item, no more than two levels, parallel construction, one idea or action per item, and appropriate punctuation; use bullets for unordered items and numbers for ordered tasks.
Format definition lists with a bold term followed by a complete, parallel, punctuated definition.
Use tables for reference information, decision support, compatibility matrices, and comparable choices; flag one-row tables, missing captions or lead-ins, sentence-case headers where title case is expected, unexplained empty cells, and code or links that would be clearer as prose.
Write procedure steps as imperative ...
Files:
docs/configure-plugins/observability/opentelemetry.mdx
docs/**/*.mdx
📄 CodeRabbit inference engine (.agents/skills/test-python-binding/SKILL.md)
For documentation-only changes, prefer
contribute-docsplus targeted command checks.
Files:
docs/configure-plugins/observability/opentelemetry.mdx
**/*.{md,mdx}
📄 CodeRabbit inference engine (AGENTS.md)
Keep stable public wrappers at the
scripts/root in docs and examples. Reference namespaced helper paths only when documenting internal maintenance work.
**/*.{md,mdx}: Prefer the documented public API, not internal shortcuts
Keep package names, repo references, and build commands current
When documenting contribution workflow, require an issue before external contribution PRs and note that NVIDIA contributors may use a GitHub or Linear issue.
Update entry-point docs when examples or reading paths change
Keep release-process and release-notes guidance in repo-maintainer docs such as
RELEASING.md, not as user-facing docs pages orCHANGELOG.md
Keep stable user-facing wrappers atscripts/root in docs and examples;
only point at namespaced helper paths when documenting internal maintenance
work
When detailed dynamic plugin guides exist, keep Rust native plugin examples,
Python worker plugin examples, andgrpc-v1protocol details on separate
pages.
Relevant getting-started or reference docs updated
Example commands still match current package names and paths
Dynamic plugin entry pages link to native, worker, Rust example, Python
example, and protocol pages when those pages exist
Images, diagrams, tables, and custom visual content remain legible and
fully accessible at representative desktop and narrow page widths
Release-policy docs still point to GitHub Releases as the only release-history source of truth
Files:
docs/configure-plugins/observability/opentelemetry.mdx
docs/**
📄 CodeRabbit inference engine (.agents/skills/contribute-docs/SKILL.md)
Run
just docswhen the docs site changed;./scripts/build-docs.sh htmlremains the compatibility wrapper
Files:
docs/configure-plugins/observability/opentelemetry.mdx
{docs/**,README.md,CONTRIBUTING.md,RELEASING.md,SECURITY.md}
⚙️ CodeRabbit configuration file
{docs/**,README.md,CONTRIBUTING.md,RELEASING.md,SECURITY.md}: Review documentation for technical accuracy against the current API, command correctness, and consistency across language bindings.
Flag stale examples, missing SPDX headers where required, and instructions that no longer match CI or pre-commit behavior.
Files:
docs/configure-plugins/observability/opentelemetry.mdx
crates/core/src/**/*.rs
📄 CodeRabbit inference engine (.agents/skills/add-binding-feature/SKILL.md)
crates/core/src/**/*.rs: 1. Core Rust
Implement the behavior first incrates/core/src/api/and
related core modules such ascrates/core/src/api/runtime/,
crates/core/src/codec/, orcrates/core/src/json.rs.
| Rust |snake_case|nemo_relay_tool_call|
Files:
crates/core/src/observability/mod.rscrates/core/src/observability/otel.rs
crates/core/src/observability/{atif,otel,openinference}.rs
📄 CodeRabbit inference engine (.agents/skills/maintain-observability/SKILL.md)
crates/core/src/observability/{atif,otel,openinference}.rs: -crates/core/src/observability/atif.rs
crates/core/src/observability/otel.rscrates/core/src/observability/openinference.rs
Files:
crates/core/src/observability/otel.rs
go/nemo_relay/**/*.go
📄 CodeRabbit inference engine (.agents/skills/test-go-binding/SKILL.md)
go/nemo_relay/**/*.go: Format changed Go packages withcd go/nemo_relay && go fmt ./...
Run Go tests withjust test-goto build and test the NeMo Relay Go binding
Usejust build-gowhen you want an explicit build-only pass or need the artifact for other work
Usejust ci=true test-gowhen you need the CI-style coverage and JUnit path
On macOS, setDYLD_LIBRARY_PATHto the../../target/releasedirectory before running the rawgo testcommand directly
Files:
go/nemo_relay/nemo_relay.go
go/nemo_relay/**
📄 CodeRabbit inference engine (.agents/skills/maintain-optimizer/SKILL.md)
Keep shared plugin helpers in
go/nemo_relayaligned with plugin registration, composition, and lifecycle behavior.
Files:
go/nemo_relay/nemo_relay.go
**/*.go
📄 CodeRabbit inference engine (CONTRIBUTING.md)
**/*.go: Formatting:gofmt
Static analysis:go vet ./...| Go |
PascalCase|nemo_relay.ToolCall|
Files:
go/nemo_relay/nemo_relay.go
go/nemo_relay/*.go
📄 CodeRabbit inference engine (.agents/skills/add-binding-feature/SKILL.md)
- Go wrapper in
go/nemo_relay/nemo_relay.gowith doc comment
Files:
go/nemo_relay/nemo_relay.go
go/**/*.go
📄 CodeRabbit inference engine (.agents/skills/validate-change/SKILL.md)
Use
test-go-binding.
Files:
go/nemo_relay/nemo_relay.go
go/nemo_relay/**/*
⚙️ CodeRabbit configuration file
go/nemo_relay/**/*: Review Go binding changes for cgo memory ownership, race safety, callback cleanup, idiomatic exported APIs, and parity with Rust/FFI behavior.
Any API change should include focused Go tests and consider race-test behavior.
Files:
go/nemo_relay/nemo_relay.go
🧠 Learnings (8)
📚 Learning: 2026-08-12T17:13:14.808Z
Learnt from: SandyChapman
Repo: NVIDIA/NeMo-Relay PR: 755
File: python/tests/integrations/langchain_tests/test_callbacks_scope_stack.py:185-185
Timestamp: 2026-08-12T17:13:14.808Z
Learning: In Python files, do not report Ruff UP017 findings unless pyproject.toml enables the UP rule set or the individual file explicitly enables UP017. The repository currently enables Ruff rule sets E, F, W, and I only.
Applied to files:
python/tests/test_observability_plugin.py
📚 Learning: 2026-07-28T23:57:11.641Z
Learnt from: willkill07
Repo: NVIDIA/NeMo-Relay PR: 570
File: crates/node/src/api/mod.rs:3265-3282
Timestamp: 2026-07-28T23:57:11.641Z
Learning: In the Node.js binding, `flushSubscribers()` is Promise-based/async and must be awaited. Any session-close or teardown path (e.g., the OpenClaw live smoke session-close flow) must await `flushSubscribers()` before continuing to live ATIF export assertions and before teardown, so queued subscriber delivery fully completes and tests/assertions observe the final state.
Applied to files:
crates/node/src/api/mod.rs
📚 Learning: 2026-08-03T19:55:03.931Z
Learnt from: afourniernv
Repo: NVIDIA/NeMo-Relay PR: 558
File: crates/pii-redaction/src/rampart/mod.rs:265-274
Timestamp: 2026-08-03T19:55:03.931Z
Learning: In NeMo Relay first-party plugin registration helpers, treat the documented duplicate-registration `PluginError::RegistrationFailed` result from `register_plugin` as success when registration is intended to be idempotent. Do not locally reclassify this as `PluginError::Conflict`; changing the classification requires a core-wide review of the public API and FFI behavior.
Applied to files:
crates/node/src/api/mod.rscrates/core/tests/unit/observability/otel_tests.rscrates/core/tests/unit/observability/plugin_component_tests.rscrates/core/tests/unit/observability/attribute_projection_tests.rscrates/core/src/observability/mod.rscrates/core/src/observability/otel.rs
📚 Learning: 2026-08-13T22:55:06.939Z
Learnt from: bbednarski9
Repo: NVIDIA/NeMo-Relay PR: 780
File: crates/core/tests/unit/observability/otel_logs_tests.rs:48-61
Timestamp: 2026-08-13T22:55:06.939Z
Learning: In NVIDIA/NeMo-Relay OTLP observability tests, do not require plugin diagnostic fields for direct LogEventProcessor or metric-subscriber helper coverage, because those helpers intentionally omit plugin diagnostics. Assert runtime diagnostic fields only through activated-plugin coverage, where endpoint-specific diagnostic fields are available.
Applied to files:
crates/core/tests/unit/observability/otel_tests.rscrates/core/tests/unit/observability/plugin_component_tests.rscrates/core/tests/unit/observability/attribute_projection_tests.rs
📚 Learning: 2026-07-14T02:53:59.997Z
Learnt from: willkill07
Repo: NVIDIA/NeMo-Relay PR: 415
File: docs/configure-plugins/observability/opentelemetry.mdx:98-113
Timestamp: 2026-07-14T02:53:59.997Z
Learning: In NeMo-Relay’s OpenTelemetry/OpenInference observability projection docs under docs/configure-plugins/observability/, document the projected-attribute contract as follows: (1) emit scalar top-level `data`/`metadata` fields as typed dotted OTLP attributes (for example, `nemo_relay.start.metadata.tenant`); (2) keep nested objects/arrays as JSON strings at their top-level OTLP attribute (rather than expanding them into nested OTLP attributes); and (3) do not reference the legacy `*_json` payload attributes (e.g., `data_json`, `metadata_json`, `input_json`) because they were intentionally removed as a breaking change.
Applied to files:
docs/configure-plugins/observability/opentelemetry.mdx
📚 Learning: 2026-07-28T20:07:29.880Z
Learnt from: willkill07
Repo: NVIDIA/NeMo-Relay PR: 571
File: crates/core/src/api/runtime/state.rs:996-1020
Timestamp: 2026-07-28T20:07:29.880Z
Learning: In NeMo Relay (RELAY-509), sanitizer callback failures must be treated as intentional fail-open behavior. When an event/tool (request/response) or LLM (request/response) sanitizer callback fails, the sanitizer chain should retain and publish the last valid event/payload snapshot (rather than dropping/invalidating the data) and log the failure including callback context (e.g., which sanitizer/callback failed and relevant identifiers). Apply this consistently across all sanitizer chains mentioned in the RELAY-509 documentation/migration guide.
Applied to files:
crates/core/src/observability/mod.rscrates/core/src/observability/otel.rs
📚 Learning: 2026-08-13T21:50:26.925Z
Learnt from: bbednarski9
Repo: NVIDIA/NeMo-Relay PR: 780
File: crates/core/src/observability/otel_metrics.rs:0-0
Timestamp: 2026-08-13T21:50:26.925Z
Learning: Within the observability Rust modules, keep signal-generic helpers such as `build_grpc_metadata`, `record_signal_runtime_diagnostic`, and `resolve_http_signal_endpoint` in `otel_signal`. The `otel_logs`, `otel_metrics`, and plugin-routing consumers should depend on these shared helpers without introducing a metrics-to-logs module dependency.
Applied to files:
crates/core/src/observability/mod.rscrates/core/src/observability/otel.rs
📚 Learning: 2026-08-15T00:46:41.611Z
Learnt from: CR
Repo: NVIDIA/NeMo-Relay PR: 0
File: .agents/skills/add-binding-feature/SKILL.md:0-0
Timestamp: 2026-08-15T00:46:41.611Z
Learning: Applies to go/nemo_relay/*.go : - [ ] Go wrapper in `go/nemo_relay/nemo_relay.go` with doc comment
Applied to files:
go/nemo_relay/nemo_relay.go
🔇 Additional comments (10)
crates/core/src/observability/mod.rs (1)
339-380: LGTM!Also applies to: 531-708
crates/core/tests/unit/observability/attribute_projection_tests.rs (1)
8-12: LGTM!Also applies to: 148-423
crates/core/src/observability/otel.rs (1)
36-39: LGTM!Also applies to: 152-154, 207-207, 229-229, 392-401, 426-427, 436-436, 493-507, 538-538, 571-631, 1031-1180, 1242-1276, 1345-1364, 1422-1514
crates/core/tests/unit/observability/otel_tests.rs (1)
495-762: LGTM!Also applies to: 1207-1207
crates/core/tests/unit/observability/plugin_component_tests.rs (1)
328-332: LGTM!Also applies to: 778-778, 965-965, 993-993, 1354-1354, 1383-1383, 1463-1482
crates/ffi/nemo_relay.h (1)
1709-1732: LGTM!Also applies to: 2939-2942, 2970-3010
crates/node/src/api/mod.rs (1)
301-302: LGTM!Also applies to: 2493-2535, 2555-2619, 4564-4565
python/nemo_relay/_native.pyi (1)
1120-1120: LGTM!Also applies to: 1727-1757
python/tests/test_observability_plugin.py (1)
140-157: LGTM!go/nemo_relay/nemo_relay.go (1)
70-75: LGTM!Also applies to: 275-275, 872-875, 916-918, 1013-1048, 2245-2277, 2336-2338, 2403-2426
github-actions
Bot
added
size:XL
|
could you check the validation of metadata between #800 and #802? I think they might disagree in some cases:
Json::Array(values) => match values.first().and_then(primitive_kind) { #802's metadata_array_to_otel disagrees: let Some(first) = values.first() else {
So an injector that adds nv.tags = [] passes #800's validation as OTel-compatible, lands in Event.metadata, and then #802 refuses to promote it and fires otel_metadata_promotion_value_unsupported on every event carrying it. One merged feature blesses a value the other treats as a warning-worthy error, and the operator gets recurring log noise for doing exactly what #800 permits. |
Signed-off-by: Eric Evans <194135482+ericevans-nv@users.noreply.github.com>
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Inline comments:
In `@crates/core/src/api/event.rs`:
- Around line 15-22: Add a Rust doc comment immediately above
is_valid_event_metadata_attribute_key describing that keys consist of non-empty
dot-separated segments containing only ASCII letters, digits, underscores, or
hyphens, and that empty or otherwise invalid segments are rejected.
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🧰 Additional context used
📓 Path-based instructions (23)
**/*.rs
📄 CodeRabbit inference engine (.agents/skills/test-ffi-surface/SKILL.md)
**/*.rs: Runcargo fmt --allfor all FFI work since it is Rust work
Runjust test-rustto validate FFI changes
Runcargo clippy --workspace --all-targets -- -D warningsto enforce strict linting on FFI workWhen Rust files changed as part of Go work, also run
cargo fmt --all,just test-rust, andcargo clippy --workspace --all-targets -- -D warnings
**/*.rs: Runcargo fmt --allwhen Rust files are changed as part of Node work
Runcargo clippy --workspace --all-targets -- -D warningswhen Rust files are changed as part of Node work
Runjust test-rustwhen Rust files are changed as part of Node work
**/*.rs: UseJson = serde_json::Valuein Rust-facing runtime APIs where the existing code expects JSON payloads.
UseResult<T>withFlowErrorin core runtime paths. Keep errors explicit and binding-appropriate at the wrapper layer.
**/*.rs: Formatting:cargo fmt(rustfmt defaults)
Linting:cargo clippy -- -D warnings-- all warnings are treated as errors
Dependency auditing:cargo deny check-- configured indeny.toml
**/*.rs: If any Rust code changed, also runcargo fmt --all.
If any Rust code changed, also runcargo clippy --workspace --all-targets -- -D warnings.
Usetest-rust-core. This always includesjust test-rust,
cargo fmt --all,cargo clippy --workspace --all-targets -- -D warnings,
and the full matrix across Rust, Python, Go, and Node.js.
Files:
crates/core/tests/unit/runtime_state_tests.rscrates/core/src/api/event.rscrates/core/tests/unit/observability/attribute_projection_tests.rscrates/core/src/api/runtime/state.rscrates/core/src/observability/mod.rs
crates/core/**/*.rs
📄 CodeRabbit inference engine (.agents/skills/test-go-binding/SKILL.md)
If the change touched
crates/coreor shared runtime semantics, also usevalidate-changefor broader validation
Files:
crates/core/tests/unit/runtime_state_tests.rscrates/core/src/api/event.rscrates/core/tests/unit/observability/attribute_projection_tests.rscrates/core/src/api/runtime/state.rscrates/core/src/observability/mod.rs
crates/{core,adaptive,plugin,worker,worker-proto,types}/**/*.{rs,toml}
📄 CodeRabbit inference engine (.agents/skills/test-rust-core/SKILL.md)
For changes in the Rust core, adaptive, dynamic plugin, worker, worker-proto, or types crates, run
cargo fmt --all,just test-rust, andcargo clippy --workspace --all-targets -- -D warningsas the default validation sequence.
Files:
crates/core/tests/unit/runtime_state_tests.rscrates/core/src/api/event.rscrates/core/tests/unit/observability/attribute_projection_tests.rscrates/core/src/api/runtime/state.rscrates/core/src/observability/mod.rs
crates/{core,adaptive,plugin,worker,worker-proto,types}/**/*
📄 CodeRabbit inference engine (.agents/skills/test-rust-core/SKILL.md)
crates/{core,adaptive,plugin,worker,worker-proto,types}/**/*: For changes affectingcrates/core,crates/adaptive, or shared Rust runtime semantics, expand validation to the full binding matrix withvalidate-change.
Use narrower crate-specific tests only as a local debug loop, not as the final validation for a Rust change.
If a public API, event shape, middleware behavior, plugin semantics, orcrates/core/crates/adaptivebehavior changes, also runvalidate-change.
If the change is isolated to one binding wrapper while Rust semantics remain unchanged, prefer that binding's build/test skill instead.
Files:
crates/core/tests/unit/runtime_state_tests.rscrates/core/src/api/event.rscrates/core/tests/unit/observability/attribute_projection_tests.rscrates/core/src/api/runtime/state.rscrates/core/src/observability/mod.rs
crates/{core,adaptive}/**/*
📄 CodeRabbit inference engine (.agents/skills/test-rust-core/SKILL.md)
For shared-semantics or broad runtime changes in the core or adaptive crates, run
just ci=true test-rust.
crates/coreorcrates/adaptivechanges ran the full language matrix
Files:
crates/core/tests/unit/runtime_state_tests.rscrates/core/src/api/event.rscrates/core/tests/unit/observability/attribute_projection_tests.rscrates/core/src/api/runtime/state.rscrates/core/src/observability/mod.rs
**/*.{rs,py,js,mjs,ts,go,c,h}
📄 CodeRabbit inference engine (AGENTS.md)
Keep SPDX headers on source, docs, scripts, and configuration files. The project is Apache-2.0.
Files:
crates/core/tests/unit/runtime_state_tests.rscrates/core/src/api/event.rscrates/core/tests/unit/observability/attribute_projection_tests.rscrates/core/src/api/runtime/state.rscrates/core/src/observability/mod.rs
**/*.{rs,py}
📄 CodeRabbit inference engine (AGENTS.md)
Follow binding naming conventions: Rust and Python
snake_case, C FFI exports prefixednemo_relay_, GoPascalCasefor public APIs, Node.jscamelCase.
Files:
crates/core/tests/unit/runtime_state_tests.rscrates/core/src/api/event.rscrates/core/tests/unit/observability/attribute_projection_tests.rscrates/core/src/api/runtime/state.rscrates/core/src/observability/mod.rs
**/*.{rs,py,js,mjs,ts}
📄 CodeRabbit inference engine (AGENTS.md)
Keep async behavior on the existing tokio-based model. Bindings should preserve callback and future lifetimes rather than blocking or hiding async work unexpectedly.
Files:
crates/core/tests/unit/runtime_state_tests.rscrates/core/src/api/event.rscrates/core/tests/unit/observability/attribute_projection_tests.rscrates/core/src/api/runtime/state.rscrates/core/src/observability/mod.rs
**/*.{rs,py,go,js,ts,html,md,mdx,toml}
📄 CodeRabbit inference engine (CONTRIBUTING.md)
All source files must include an SPDX license header.
Files:
crates/core/tests/unit/runtime_state_tests.rscrates/core/src/api/event.rscrates/core/tests/unit/observability/attribute_projection_tests.rscrates/core/src/api/runtime/state.rscrates/core/src/observability/mod.rs
**/*.{rs,c,h}
📄 CodeRabbit inference engine (CONTRIBUTING.md)
Use the naming conventions appropriate to each language: Rust
snake_case, C FFI exports prefixednemo_relay_, GoPascalCase, Node.jscamelCase, Pythonsnake_case.
Files:
crates/core/tests/unit/runtime_state_tests.rscrates/core/src/api/event.rscrates/core/tests/unit/observability/attribute_projection_tests.rscrates/core/src/api/runtime/state.rscrates/core/src/observability/mod.rs
**/*.{rs,py,go,js,ts}
📄 CodeRabbit inference engine (CONTRIBUTING.md)
**/*.{rs,py,go,js,ts}: Run tests for every language affected by your changes. If your change touches the core Rust crate, run tests across all bindings since they all depend on it.
When adding new functionality, include tests in the appropriate test files for each affected language binding.
**/*.{rs,py,go,js,ts}: - [ ] Do all bindings expose the same logical knobs and semantics?
- Does every OpenTelemetry endpoint require a type and nonblank destination?
- Does each endpoint resolve
header_envvalues at activation and reject
missing, blank, or duplicate headers?- Are OpenTelemetry and OpenInference dependencies unconditional rather
than Cargo feature-gated?- Does
enable_full_payloadspreserve complete sanitized LLM request input
and annotations while leaving credential removal and sanitizers active?- Does Relay derive compliant trace and span IDs consistently across typed
OpenTelemetry endpoints while preserving lifecycle parentage?- Are mark events, start/end events, and orphan cases still handled correctly?
- Do examples and docs use each exporter's documented flush/deregister
order before shutdown?- Run the affected Rust crate tests plus
just test-rustif event
fields changed.- Run
just test-python,just test-go, andjust test-nodewhen
binding-native config or lifecycle changed.
Files:
crates/core/tests/unit/runtime_state_tests.rscrates/core/src/api/event.rscrates/core/tests/unit/observability/attribute_projection_tests.rscrates/core/src/api/runtime/state.rscrates/core/src/observability/mod.rs
**/*
📄 CodeRabbit inference engine (CONTRIBUTING.md)
**/*: Every commit in a pull request must include a Developer Certificate of Origin sign-off.
CI must pass before merging.
UseSONAR_IGNORE_START/SONAR_IGNORE_ENDonly for documented false
positives that cannot be resolved in code or by improving the analyzer
configuration.
Keep the ignored block as small as possible, add a brief comment
explaining why the suppression is needed, and call it out in the PR description
so reviewers can explicitly sign off on it.
Keep the first line under 72 characters. Use the body for additional context when the change is not self-explanatory.
**/*: - [ ] Branch scope is coherent and reviewable
Relevant tests passed under
validate-changeDocs and examples updated for any public behavior changes
Pull request title follows Conventional Commit style and uses the correct
type
Use Conventional Commit style for PR titles:
Only check the contribution confirmation boxes when they are true. If either
confirmation cannot be made, stop before opening the PR and surface the blocker.SPDX license header on any new files
**/*: Tool execution callbacks and each execution-interceptnextcontinuation
return the canonicalToolExecutionResult { result, annotation }. A forwarding
intercept must preserve both fields inToolExecutionInterceptOutcome; Relay
retainspending_marksseparately.
Tool sanitize-response guardrails receive
onlyresult.
- Registration and duplicate-name behavior
- Deregistration and no-op missing-name behavior
- Ordering by priority
- Callback failure policy, including fail-open behavior when required
- Scope-local registration, inheritance, and cleanup on pop
- Parity coverage in every affected binding
**/*: Keep NeMo Relay optional
Use stable, documented framework or plugin APIs
Wrap tool and LLM paths at the correct framework boundary
Preserve the framework's original behavior when NeMo Relay is absent
Integration uses public framework or plugin A...
Files:
crates/core/tests/unit/runtime_state_tests.rscrates/core/src/api/event.rscrates/core/tests/unit/observability/attribute_projection_tests.rscrates/core/src/api/runtime/state.rscrates/core/src/observability/mod.rs
**/*.{rs,toml}
📄 CodeRabbit inference engine (.agents/skills/prepare-pr/SKILL.md)
**/*.{rs,toml}: - [ ] Any Rust change ranjust test-rust
- Any Rust change ran
cargo fmt --all- Any Rust change ran
cargo clippy --workspace --all-targets -- -D warningsIf any Rust code changed, always run
just test-rust.
Files:
crates/core/tests/unit/runtime_state_tests.rscrates/core/src/api/event.rscrates/core/tests/unit/observability/attribute_projection_tests.rscrates/core/src/api/runtime/state.rscrates/core/src/observability/mod.rs
**/*.{rs,py,pyi,go,js,ts}
📄 CodeRabbit inference engine (.agents/skills/add-binding-feature/SKILL.md)
**/*.{rs,py,pyi,go,js,ts}: 6. Validation
Run the validation matrix from thevalidate-changeskill for the affected
surfaces.
- Tests added in every affected language surface
Files:
crates/core/tests/unit/runtime_state_tests.rscrates/core/src/api/event.rscrates/core/tests/unit/observability/attribute_projection_tests.rscrates/core/src/api/runtime/state.rscrates/core/src/observability/mod.rs
{crates,python}/**/*.{rs,py}
📄 CodeRabbit inference engine (.agents/skills/maintain-dynamic-plugins/SKILL.md)
Rust and Python SDKs expose every supported registration surface.
Files:
crates/core/tests/unit/runtime_state_tests.rscrates/core/src/api/event.rscrates/core/tests/unit/observability/attribute_projection_tests.rscrates/core/src/api/runtime/state.rscrates/core/src/observability/mod.rs
**/*.{md,mdx,rs,py,go,js,ts}
📄 CodeRabbit inference engine (.agents/skills/maintain-observability/SKILL.md)
- Update docs and examples in the same branch.
Files:
crates/core/tests/unit/runtime_state_tests.rscrates/core/src/api/event.rscrates/core/tests/unit/observability/attribute_projection_tests.rscrates/core/src/api/runtime/state.rscrates/core/src/observability/mod.rs
**/*.{py,rs,go,js,jsx,ts,tsx}
📄 CodeRabbit inference engine (.agents/skills/validate-change/SKILL.md)
**/*.{py,rs,go,js,jsx,ts,tsx}: If a language surface changed, always run that language's test target even when
Rust core did not change.
Files:
crates/core/tests/unit/runtime_state_tests.rscrates/core/src/api/event.rscrates/core/tests/unit/observability/attribute_projection_tests.rscrates/core/src/api/runtime/state.rscrates/core/src/observability/mod.rs
**/*.{rs,h,c,cc,cpp}
📄 CodeRabbit inference engine (.agents/skills/validate-change/SKILL.md)
Use
test-ffi-surface.
Files:
crates/core/tests/unit/runtime_state_tests.rscrates/core/src/api/event.rscrates/core/tests/unit/observability/attribute_projection_tests.rscrates/core/src/api/runtime/state.rscrates/core/src/observability/mod.rs
crates/{core,adaptive}/**/*.rs
⚙️ CodeRabbit configuration file
crates/{core,adaptive}/**/*.rs: Review the Rust runtime for async correctness, scope isolation, middleware ordering, and event lifecycle regressions.
Pay close attention to task-local/thread-local scope propagation, callback lifetimes, stream finalization, and root_uuid isolation.
Public API changes should preserve existing behavior unless tests and docs show the intended migration path.
Files:
crates/core/tests/unit/runtime_state_tests.rscrates/core/src/api/event.rscrates/core/tests/unit/observability/attribute_projection_tests.rscrates/core/src/api/runtime/state.rscrates/core/src/observability/mod.rs
{crates/**/tests/**,python/tests/**,go/nemo_relay/**/*_test.go}
⚙️ CodeRabbit configuration file
{crates/**/tests/**,python/tests/**,go/nemo_relay/**/*_test.go}: Tests should cover the behavior promised by the changed API surface, including error paths and cross-request isolation where relevant.
Prefer assertions on lifecycle events, scope stacks, middleware ordering, and binding parity over shallow smoke tests.
Files:
crates/core/tests/unit/runtime_state_tests.rscrates/core/tests/unit/observability/attribute_projection_tests.rs
crates/core/src/**/*.rs
📄 CodeRabbit inference engine (.agents/skills/add-binding-feature/SKILL.md)
crates/core/src/**/*.rs: 1. Core Rust
Implement the behavior first incrates/core/src/api/and
related core modules such ascrates/core/src/api/runtime/,
crates/core/src/codec/, orcrates/core/src/json.rs.
| Rust |snake_case|nemo_relay_tool_call|
Files:
crates/core/src/api/event.rscrates/core/src/api/runtime/state.rscrates/core/src/observability/mod.rs
crates/core/src/api/**/*.rs
📄 CodeRabbit inference engine (.agents/skills/add-binding-feature/SKILL.md)
- Core function with doc comment in
crates/core/src/api/
Files:
crates/core/src/api/event.rscrates/core/src/api/runtime/state.rs
crates/core/src/api/runtime/state.rs
📄 CodeRabbit inference engine (.agents/skills/add-middleware/SKILL.md)
crates/core/src/api/runtime/state.rs: Add the registry field toNemoRelayContextStatein
crates/core/src/api/runtime/state.rs.
Add chain execution helpers toNemoRelayContextStatein
crates/core/src/api/runtime/state.rs.
Files:
crates/core/src/api/runtime/state.rs
🧠 Learnings (8)
📚 Learning: 2026-08-15T00:47:41.249Z
Learnt from: CR
Repo: NVIDIA/NeMo-Relay PR: 0
File: .agents/skills/maintain-observability/SKILL.md:0-0
Timestamp: 2026-08-15T00:47:41.249Z
Learning: Applies to **/*.{rs,py,go,js,ts} : - Run the affected Rust crate tests plus `just test-rust` if event
fields changed.
Applied to files:
crates/core/tests/unit/runtime_state_tests.rs
📚 Learning: 2026-08-03T19:55:03.931Z
Learnt from: afourniernv
Repo: NVIDIA/NeMo-Relay PR: 558
File: crates/pii-redaction/src/rampart/mod.rs:265-274
Timestamp: 2026-08-03T19:55:03.931Z
Learning: In NeMo Relay first-party plugin registration helpers, treat the documented duplicate-registration `PluginError::RegistrationFailed` result from `register_plugin` as success when registration is intended to be idempotent. Do not locally reclassify this as `PluginError::Conflict`; changing the classification requires a core-wide review of the public API and FFI behavior.
Applied to files:
crates/core/tests/unit/runtime_state_tests.rscrates/core/src/api/event.rscrates/core/tests/unit/observability/attribute_projection_tests.rscrates/core/src/api/runtime/state.rscrates/core/src/observability/mod.rs
📚 Learning: 2026-08-15T00:46:41.611Z
Learnt from: CR
Repo: NVIDIA/NeMo-Relay PR: 0
File: .agents/skills/add-binding-feature/SKILL.md:0-0
Timestamp: 2026-08-15T00:46:41.611Z
Learning: Applies to crates/core/src/api/**/*.rs : - [ ] Core function with doc comment in `crates/core/src/api/`
Applied to files:
crates/core/src/api/event.rs
📚 Learning: 2026-07-28T20:07:29.880Z
Learnt from: willkill07
Repo: NVIDIA/NeMo-Relay PR: 571
File: crates/core/src/api/runtime/state.rs:996-1020
Timestamp: 2026-07-28T20:07:29.880Z
Learning: In NeMo Relay (RELAY-509), sanitizer callback failures must be treated as intentional fail-open behavior. When an event/tool (request/response) or LLM (request/response) sanitizer callback fails, the sanitizer chain should retain and publish the last valid event/payload snapshot (rather than dropping/invalidating the data) and log the failure including callback context (e.g., which sanitizer/callback failed and relevant identifiers). Apply this consistently across all sanitizer chains mentioned in the RELAY-509 documentation/migration guide.
Applied to files:
crates/core/src/api/event.rscrates/core/src/api/runtime/state.rscrates/core/src/observability/mod.rs
📚 Learning: 2026-08-13T21:02:41.142Z
Learnt from: bbednarski9
Repo: NVIDIA/NeMo-Relay PR: 780
File: crates/core/src/api/llm.rs:0-0
Timestamp: 2026-08-13T21:02:41.142Z
Learning: In NeMo Relay API Rust code, validate middleware-generated pending marks and tool outcome marks independently. If a mark has invalid severity metadata, such as a typed severity with non-object metadata, log contextual information, skip only that invalid mark, and continue emitting subsequent marks. Do not abort an otherwise successful managed LLM or tool operation because of a post-intercept mark-validation failure.
Applied to files:
crates/core/src/api/event.rs
📚 Learning: 2026-08-13T22:55:06.939Z
Learnt from: bbednarski9
Repo: NVIDIA/NeMo-Relay PR: 780
File: crates/core/tests/unit/observability/otel_logs_tests.rs:48-61
Timestamp: 2026-08-13T22:55:06.939Z
Learning: In NVIDIA/NeMo-Relay OTLP observability tests, do not require plugin diagnostic fields for direct LogEventProcessor or metric-subscriber helper coverage, because those helpers intentionally omit plugin diagnostics. Assert runtime diagnostic fields only through activated-plugin coverage, where endpoint-specific diagnostic fields are available.
Applied to files:
crates/core/tests/unit/observability/attribute_projection_tests.rs
📚 Learning: 2026-07-28T03:31:05.964Z
Learnt from: willkill07
Repo: NVIDIA/NeMo-Relay PR: 564
File: crates/core/src/api/runtime/subscriber_dispatcher.rs:297-314
Timestamp: 2026-07-28T03:31:05.964Z
Learning: In this codebase’s runtime API, do not implement incremental native LLM stream forwarding via the native ABI v3 asynchronous middleware protocol (it can only settle a single JSON value via a one-shot completion handle and cannot forward stream chunks incrementally). If a latency-sensitive plugin needs streaming behavior, review for use of synchronous native stream intercepts or worker plugins instead of trying to chunk-deliver or incrementally forward over the ABI v3 async path.
Applied to files:
crates/core/src/api/runtime/state.rs
📚 Learning: 2026-08-13T21:50:26.925Z
Learnt from: bbednarski9
Repo: NVIDIA/NeMo-Relay PR: 780
File: crates/core/src/observability/otel_metrics.rs:0-0
Timestamp: 2026-08-13T21:50:26.925Z
Learning: Within the observability Rust modules, keep signal-generic helpers such as `build_grpc_metadata`, `record_signal_runtime_diagnostic`, and `resolve_http_signal_endpoint` in `otel_signal`. The `otel_logs`, `otel_metrics`, and plugin-routing consumers should depend on these shared helpers without introducing a metrics-to-logs module dependency.
Applied to files:
crates/core/src/observability/mod.rs
🔇 Additional comments (4)
crates/core/src/api/runtime/state.rs (1)
24-25: LGTM!Also applies to: 1788-1807
crates/core/src/observability/mod.rs (1)
6-6: LGTM!Also applies to: 339-376, 526-560, 561-605, 607-639, 641-667, 670-703
crates/core/tests/unit/observability/attribute_projection_tests.rs (1)
8-12: LGTM!Also applies to: 148-233, 235-268, 270-327, 329-356, 358-409, 411-452
crates/core/tests/unit/runtime_state_tests.rs (1)
36-39: LGTM!Also applies to: 65-68, 95-96
|
@bbednarski9 Thanks for the detailed review.
Agreed that the configuration documentation needs to land with the feature. I’ve updated the OpenTelemetry metadata promotion documentation in PR #803 to reflect the finalized behavior. When you have a chance, could you please review the changes for inclusion in 0.8.0?
Thanks for catching these inconsistencies. I aligned the contracts in
The precedence rules apply at different stages. “First wins” determines which injector can insert a key into one Event. Scope-end precedence applies later, when OpenTelemetry combines the separate Scope-start and Scope-end Events into one span. I’ll make that distinction explicit in PR #803.
Agreed. |
2 participants
Overview
Relay already exports Event metadata under lifecycle-specific Relay attribute names. This change adds an opt-in
promote_metadata_prefixessetting that also exposes matching metadata under its original key as a top-level OpenTelemetry attribute.The option defaults to an empty list, so existing OpenTelemetry output remains unchanged unless promotion is explicitly configured.
Follow-up documentation: PR #803.
Details
promote_metadata_prefixesto each OpenTelemetry trace endpoint.nv.selects keys beginning withnv.,nv_selects keys beginning withnv_, anduserselects keys such asusernameanduser_api_key.Validation completed:
just test-pythonpassed 682 tests.just test-nodepassed 386 tests.just test-gopassed.main, including Ruff, Python type checking, FFI header synchronization, Cargo formatting, Clippy, Cargo check, Go formatting and vet, and Node formatting.Where should the reviewer start?
Start with
crates/core/src/observability/mod.rsfor prefix validation and typed conversion, followed bycrates/core/src/observability/otel.rsfor Scope and Mark lifecycle behavior and collision handling.Related Issues: (use one of the action keywords Closes / Fixes / Resolves / Relates to)
Summary by CodeRabbit
New Features
Bug Fixes
Validation