feat(contrib/net/http): support OpenTelemetry client semantics

[marcotc]

What does this PR do?

This PR follows #5220 and applies its shared HTTP attributes to net/http client spans; later server PRs build on the same helpers. Keeping integration-specific request handling here leaves shared attribute definitions in #5220.

When DD_TRACE_OTEL_SEMANTICS_ENABLED=true, net/http client spans use OpenTelemetry HTTP client names and attributes instead of Datadog names and attributes.

Datadog semantics treat 4xx client responses as errors by default. OpenTelemetry semantics treat 4xx, 5xx, and invalid status codes as errors. DD_TRACE_HTTP_CLIENT_ERROR_STATUSES still overrides the default.

Existing Datadog behavior does not change when the flag is false or unset.

DataDog/system-tests#7455 covers this behavior.

Motivation

The OpenTelemetry HTTP semantics RFC defines the required cross-tracer behavior and is the primary implementation and review reference for this PR.

APMAPI-2121, part of APMAPI-2036, requires net/http client instrumentation to follow OpenTelemetry HTTP client semantic conventions when users enable the opt-in mode.

Reviewer's Checklist

• Changed code has unit tests for its functionality at or near 100% coverage.
• System-Tests covering this feature have been added and enabled with the va.b.c-dev version tag.
• There is a benchmark for any new code, or changes to existing code.
• If this interacts with the agent in a new way, a system test has been added.
• New code is free of linting errors. You can check this by running make lint locally.
• New code doesn't break existing tests. You can check this by running make test locally.
• Add an appropriate team label so this PR gets put in the right place for the release notes.
• All generated files are up to date. You can check this by running make generate locally.
• Non-trivial go.mod changes, e.g. adding new modules, are reviewed by @DataDog/dd-trace-go-guild. Make sure all nested modules are up to date by running make fix-modules locally.

[datadog-datadog-prod-us1]

✅ All CI checks and tests passed.

🎉 All green!

🧪 All tests passed
❄️ No new flaky tests detected

🎯 Code Coverage (details)
• Patch Coverage: 100.00%
• Overall Coverage: 72.87% (+13.00%)

_{This comment will be updated automatically if new data arrives.
🔗 Commit SHA: 2b55544 | Docs | View more details | Give us feedback!}

[github-actions]

Config Audit

PACKAGE: contrib/cloud.google.com/go/pubsubtrace
  STATUS      CONFIG                                            CALL_SITES
  UNMIGRATED  DD_GOOGLE_CLOUD_PUBSUB_PROPAGATION_AS_SPAN_LINKS  1

PACKAGE: contrib/confluentinc/confluent-kafka-go/kafkatrace
  STATUS      CONFIG                            CALL_SITES
  UNMIGRATED  DD_TRACE_KAFKA_ANALYTICS_ENABLED  1

PACKAGE: crashtracker
  STATUS      CONFIG                    CALL_SITES
  STILL_READ  DD_API_KEY                1
  STILL_READ  DD_SITE                   1
  STILL_READ  DD_TAGS                   1
  UNMIGRATED  DD_CRASHTRACKING_ENABLED  1

PACKAGE: ddtrace/opentelemetry/log
  STATUS      CONFIG                            CALL_SITES
  STILL_READ  DD_AGENT_HOST                     2
  STILL_READ  DD_ENV                            1
  STILL_READ  DD_SERVICE                        1
  STILL_READ  DD_TAGS                           1
  STILL_READ  DD_TRACE_AGENT_URL                2
  STILL_READ  DD_TRACE_REPORT_HOSTNAME          1
  STILL_READ  DD_VERSION                        1
  STILL_READ  OTEL_EXPORTER_OTLP_ENDPOINT       4
  STILL_READ  OTEL_EXPORTER_OTLP_HEADERS        2
  STILL_READ  OTEL_EXPORTER_OTLP_PROTOCOL       2
  UNMIGRATED  DD_HOSTNAME                       1
  UNMIGRATED  OTEL_BLRP_EXPORT_TIMEOUT          1
  UNMIGRATED  OTEL_BLRP_MAX_EXPORT_BATCH_SIZE   1
  UNMIGRATED  OTEL_BLRP_MAX_QUEUE_SIZE          1
  UNMIGRATED  OTEL_BLRP_SCHEDULE_DELAY          1
  UNMIGRATED  OTEL_EXPORTER_OTLP_LOGS_ENDPOINT  4
  UNMIGRATED  OTEL_EXPORTER_OTLP_LOGS_HEADERS   2
  UNMIGRATED  OTEL_EXPORTER_OTLP_LOGS_PROTOCOL  2
  UNMIGRATED  OTEL_EXPORTER_OTLP_LOGS_TIMEOUT   1
  UNMIGRATED  OTEL_EXPORTER_OTLP_TIMEOUT        1
  UNMIGRATED  OTEL_RESOURCE_ATTRIBUTES          1

PACKAGE: ddtrace/opentelemetry/metric
  STATUS      CONFIG                                             CALL_SITES
  STILL_READ  DD_AGENT_HOST                                      2
  STILL_READ  DD_ENV                                             1
  STILL_READ  DD_METRICS_OTEL_ENABLED                            1
  STILL_READ  DD_SERVICE                                         1
  STILL_READ  DD_TAGS                                            1
  STILL_READ  DD_TRACE_AGENT_URL                                 2
  STILL_READ  DD_TRACE_REPORT_HOSTNAME                           1
  STILL_READ  DD_VERSION                                         1
  STILL_READ  OTEL_EXPORTER_OTLP_ENDPOINT                        2
  STILL_READ  OTEL_EXPORTER_OTLP_HEADERS                         1
  STILL_READ  OTEL_EXPORTER_OTLP_METRICS_ENDPOINT                2
  STILL_READ  OTEL_EXPORTER_OTLP_METRICS_HEADERS                 1
  STILL_READ  OTEL_EXPORTER_OTLP_METRICS_PROTOCOL                2
  STILL_READ  OTEL_EXPORTER_OTLP_PROTOCOL                        2
  STILL_READ  OTEL_METRICS_EXPORTER                              1
  UNMIGRATED  DD_HOSTNAME                                        1
  UNMIGRATED  OTEL_EXPORTER_OTLP_METRICS_TEMPORALITY_PREFERENCE  1
  UNMIGRATED  OTEL_EXPORTER_OTLP_TIMEOUT                         1
  UNMIGRATED  OTEL_RESOURCE_ATTRIBUTES                           1
  UNMIGRATED  OTEL_SERVICE_NAME                                  1

PACKAGE: ddtrace/tracer
  STATUS      CONFIG                                    CALL_SITES
  STILL_READ  DD_TRACE_PROPAGATION_BEHAVIOR_EXTRACT     1
  STILL_READ  DD_TRACE_PROPAGATION_EXTRACT_FIRST        1
  STILL_READ  DD_TRACE_PROPAGATION_STYLE_EXTRACT        1
  STILL_READ  DD_TRACE_PROPAGATION_STYLE_INJECT         1
  UNMIGRATED  DD_APM_TRACING_ENABLED                    1
  UNMIGRATED  DD_TRACE_128_BIT_TRACEID_LOGGING_ENABLED  1
  UNMIGRATED  DD_TRACE_DEBUG_SEELOG_WORKAROUND          1
  UNMIGRATED  OTEL_TRACES_SAMPLER_ARG                   1

PACKAGE: instrumentation
  STATUS      CONFIG                                       CALL_SITES
  STILL_READ  DD_DATA_STREAMS_ENABLED                      1
  UNMIGRATED  DD_API_SECURITY_ENDPOINT_COLLECTION_ENABLED  1

PACKAGE: instrumentation/graphql
  STATUS      CONFIG                             CALL_SITES
  UNMIGRATED  DD_TRACE_GRAPHQL_ERROR_EXTENSIONS  1

PACKAGE: instrumentation/httptrace
  STATUS      CONFIG                                                 CALL_SITES
  UNMIGRATED  DD_GOOGLE_CLOUD_PUBSUB_PROPAGATION_AS_SPAN_LINKS       1
  UNMIGRATED  DD_TRACE_BAGGAGE_TAG_KEYS                              1
  UNMIGRATED  DD_TRACE_CLIENT_IP_ENABLED                             1
  UNMIGRATED  DD_TRACE_HTTP_SERVER_ERROR_STATUSES                    1
  UNMIGRATED  DD_TRACE_HTTP_URL_QUERY_STRING_ALLOWLIST               1
  UNMIGRATED  DD_TRACE_HTTP_URL_QUERY_STRING_ALLOWLIST_CLIENT        1
  UNMIGRATED  DD_TRACE_HTTP_URL_QUERY_STRING_ALLOWLIST_SERVER        1
  UNMIGRATED  DD_TRACE_HTTP_URL_QUERY_STRING_DISABLED                1
  UNMIGRATED  DD_TRACE_INFERRED_PROXY_SERVICES_ENABLED               1
  UNMIGRATED  DD_TRACE_OBFUSCATION_QUERY_STRING_REGEXP               2
  UNMIGRATED  DD_TRACE_RESOURCE_RENAMING_ALWAYS_SIMPLIFIED_ENDPOINT  1
  UNMIGRATED  DD_TRACE_RESOURCE_RENAMING_ENABLED                     1

PACKAGE: instrumentation/internal/namingschema
  STATUS      CONFIG                                             CALL_SITES
  STILL_READ  DD_SERVICE                                         1
  UNMIGRATED  DD_TRACE_REMOVE_INTEGRATION_SERVICE_NAMES_ENABLED  1

PACKAGE: internal
  STATUS      CONFIG                         CALL_SITES
  STILL_READ  DD_AGENT_HOST                  1
  STILL_READ  DD_TAGS                        1
  STILL_READ  DD_TRACE_AGENT_PORT            1
  STILL_READ  DD_TRACE_AGENT_URL             1
  UNMIGRATED  DD_EXTERNAL_ENV                1
  UNMIGRATED  DD_GIT_COMMIT_SHA              1
  UNMIGRATED  DD_GIT_REPOSITORY_URL          1
  UNMIGRATED  DD_TRACE_GIT_METADATA_ENABLED  1

PACKAGE: internal/appsec
  STATUS      CONFIG           CALL_SITES
  UNMIGRATED  DD_APPSEC_RULES  1

PACKAGE: internal/appsec/config
  STATUS      CONFIG                                                CALL_SITES
  UNMIGRATED  DD_API_SECURITY_DOWNSTREAM_BODY_ANALYSIS_SAMPLE_RATE  1
  UNMIGRATED  DD_API_SECURITY_ENABLED                               1
  UNMIGRATED  DD_API_SECURITY_MAX_DOWNSTREAM_REQUEST_BODY_ANALYSIS  1
  UNMIGRATED  DD_API_SECURITY_PROXY_SAMPLE_RATE                     1
  UNMIGRATED  DD_API_SECURITY_REQUEST_SAMPLE_RATE                   1
  UNMIGRATED  DD_API_SECURITY_SAMPLE_DELAY                          1
  UNMIGRATED  DD_APM_TRACING_ENABLED                                1
  UNMIGRATED  DD_APPSEC_AGENTIC_ONBOARDING                          1
  UNMIGRATED  DD_APPSEC_ENABLED                                     2
  UNMIGRATED  DD_APPSEC_MAX_STACK_TRACE_DEPTH                       1
  UNMIGRATED  DD_APPSEC_RASP_ENABLED                                1
  UNMIGRATED  DD_APPSEC_RULES                                       1
  UNMIGRATED  DD_APPSEC_SCA_ENABLED                                 1
  UNMIGRATED  DD_APPSEC_STACK_TRACE_ENABLED                         1
  UNMIGRATED  DD_APPSEC_TRACE_RATE_LIMIT                            1
  UNMIGRATED  DD_APPSEC_WAF_TIMEOUT                                 1

PACKAGE: internal/bazel
  STATUS      CONFIG                                  CALL_SITES
  UNMIGRATED  DD_TEST_OPTIMIZATION_MANIFEST_FILE      1
  UNMIGRATED  DD_TEST_OPTIMIZATION_PAYLOADS_IN_FILES  1

PACKAGE: internal/civisibility/envconfig
  STATUS      CONFIG                   CALL_SITES
  STILL_READ  DD_CIVISIBILITY_ENABLED  1

PACKAGE: internal/civisibility/integrations
  STATUS      CONFIG                                               CALL_SITES
  STILL_READ  DD_SERVICE                                           1
  STILL_READ  DD_TRACE_DEBUG                                       1
  UNMIGRATED  DD_CIVISIBILITY_CODE_COVERAGE_REPORT_UPLOAD_ENABLED  1
  UNMIGRATED  DD_CIVISIBILITY_EARLY_FLAKE_DETECTION_ENABLED        1
  UNMIGRATED  DD_CIVISIBILITY_EARLY_FLAKE_DETECTION_MAX_RETRIES    1
  UNMIGRATED  DD_CIVISIBILITY_FLAKY_RETRY_COUNT                    1
  UNMIGRATED  DD_CIVISIBILITY_FLAKY_RETRY_ENABLED                  1
  UNMIGRATED  DD_CIVISIBILITY_GIT_UPLOAD_ENABLED                   1
  UNMIGRATED  DD_CIVISIBILITY_IMPACTED_TESTS_DETECTION_ENABLED     1
  UNMIGRATED  DD_CIVISIBILITY_SUBTEST_FEATURES_ENABLED             1
  UNMIGRATED  DD_CIVISIBILITY_TOTAL_FLAKY_RETRY_COUNT              1
  UNMIGRATED  DD_TEST_MANAGEMENT_ATTEMPT_TO_FIX_RETRIES            1
  UNMIGRATED  DD_TEST_MANAGEMENT_ENABLED                           1

PACKAGE: internal/civisibility/integrations/gotesting
  STATUS      CONFIG                                                           CALL_SITES
  UNMIGRATED  DD_CIVISIBILITY_INTERNAL_PARALLEL_EARLY_FLAKE_DETECTION_ENABLED  2
  UNMIGRATED  DD_CIVISIBILITY_RETRY_EXECUTION_MODE                             1
  UNMIGRATED  DD_CIVISIBILITY_RETRY_PROCESS_MAX_CONCURRENCY                    1
  UNMIGRATED  DD_CIVISIBILITY_RETRY_PROCESS_TIMEOUT                            1
  UNMIGRATED  DD_TEST_MANAGEMENT_ENABLED                                       2

PACKAGE: internal/civisibility/integrations/logs
  STATUS      CONFIG                        CALL_SITES
  UNMIGRATED  DD_CIVISIBILITY_LOGS_ENABLED  1

PACKAGE: internal/civisibility/utils
  STATUS      CONFIG                              CALL_SITES
  STILL_READ  DD_SERVICE                          1
  UNMIGRATED  DD_ACTION_EXECUTION_ID              1
  UNMIGRATED  DD_PIPELINE_EXECUTION_ID            1
  UNMIGRATED  DD_TEST_OPTIMIZATION_ENV_DATA_FILE  1
  UNMIGRATED  DD_TEST_SESSION_NAME                1

PACKAGE: internal/civisibility/utils/net
  STATUS      CONFIG                             CALL_SITES
  STILL_READ  DD_API_KEY                         1
  STILL_READ  DD_CIVISIBILITY_AGENTLESS_ENABLED  1
  STILL_READ  DD_CIVISIBILITY_AGENTLESS_URL      1
  STILL_READ  DD_ENV                             1
  STILL_READ  DD_SERVICE                         1
  STILL_READ  DD_SITE                            1
  STILL_READ  DD_TAGS                            1
  STILL_READ  DD_VERSION                         1
  UNMIGRATED  DD_CODE_COVERAGE_FLAGS             1

PACKAGE: internal/civisibility/utils/telemetry
  STATUS      CONFIG                                         CALL_SITES
  UNMIGRATED  DD_CIVISIBILITY_AUTO_INSTRUMENTATION_PROVIDER  1

PACKAGE: internal/clientip
  STATUS      CONFIG                     CALL_SITES
  UNMIGRATED  DD_TRACE_CLIENT_IP_HEADER  1

PACKAGE: internal/globalconfig
  STATUS      CONFIG                           CALL_SITES
  UNMIGRATED  DD_INSTRUMENTATION_INSTALL_ID    1
  UNMIGRATED  DD_INSTRUMENTATION_INSTALL_TIME  1
  UNMIGRATED  DD_INSTRUMENTATION_INSTALL_TYPE  1

PACKAGE: internal/hostname
  STATUS      CONFIG       CALL_SITES
  UNMIGRATED  DD_HOSTNAME  1

PACKAGE: internal/namingschema
  STATUS      CONFIG                                             CALL_SITES
  UNMIGRATED  DD_TRACE_REMOVE_INTEGRATION_SERVICE_NAMES_ENABLED  1

PACKAGE: internal/processtags
  STATUS      CONFIG                                          CALL_SITES
  UNMIGRATED  DD_EXPERIMENTAL_PROPAGATE_PROCESS_TAGS_ENABLED  1

PACKAGE: internal/remoteconfig
  STATUS      CONFIG                                  CALL_SITES
  STILL_READ  DD_ENV                                  1
  UNMIGRATED  DD_RC_TUF_ROOT                          1
  UNMIGRATED  DD_REMOTE_CONFIGURATION_ENABLED         1
  UNMIGRATED  DD_REMOTE_CONFIG_POLL_INTERVAL_SECONDS  1

PACKAGE: internal/telemetry
  STATUS      CONFIG                                             CALL_SITES
  STILL_READ  DD_API_KEY                                         1
  STILL_READ  DD_SITE                                            1
  UNMIGRATED  DD_API_SECURITY_ENDPOINT_COLLECTION_MESSAGE_LIMIT  1
  UNMIGRATED  DD_INSTRUMENTATION_TELEMETRY_ENABLED               1
  UNMIGRATED  DD_TELEMETRY_DEBUG                                 1
  UNMIGRATED  DD_TELEMETRY_DEPENDENCY_COLLECTION_ENABLED         1
  UNMIGRATED  DD_TELEMETRY_EXTENDED_HEARTBEAT_INTERVAL           1
  UNMIGRATED  DD_TELEMETRY_HEARTBEAT_INTERVAL                    1
  UNMIGRATED  DD_TELEMETRY_LOG_COLLECTION_ENABLED                1
  UNMIGRATED  DD_TELEMETRY_METRICS_ENABLED                       1

PACKAGE: openfeature
  STATUS      CONFIG                                                     CALL_SITES
  STILL_READ  DD_ENV                                                     2
  STILL_READ  DD_SERVICE                                                 2
  STILL_READ  DD_VERSION                                                 2
  UNMIGRATED  DD_EXPERIMENTAL_FLAGGING_PROVIDER_SPAN_ENRICHMENT_ENABLED  1
  UNMIGRATED  DD_FLAGGING_EVALUATION_COUNTS_ENABLED                      1

PACKAGE: profiler
  STATUS      CONFIG                                    CALL_SITES
  STILL_READ  DD_API_KEY                                1
  STILL_READ  DD_ENV                                    1
  STILL_READ  DD_SERVICE                                1
  STILL_READ  DD_SITE                                   1
  STILL_READ  DD_TAGS                                   1
  STILL_READ  DD_TRACE_STARTUP_LOGS                     1
  STILL_READ  DD_VERSION                                1
  UNMIGRATED  DD_PROFILING_AGENTLESS                    1
  UNMIGRATED  DD_PROFILING_DEBUG_COMPRESSION_SETTINGS   1
  UNMIGRATED  DD_PROFILING_DELTA                        1
  UNMIGRATED  DD_PROFILING_ENABLED                      3
  UNMIGRATED  DD_PROFILING_ENDPOINT_COUNT_ENABLED       1
  UNMIGRATED  DD_PROFILING_EXECUTION_TRACE_ENABLED      1
  UNMIGRATED  DD_PROFILING_EXECUTION_TRACE_LIMIT_BYTES  1
  UNMIGRATED  DD_PROFILING_EXECUTION_TRACE_PERIOD       1
  UNMIGRATED  DD_PROFILING_FLUSH_ON_EXIT                1
  UNMIGRATED  DD_PROFILING_OUTPUT_DIR                   1
  UNMIGRATED  DD_PROFILING_UPLOAD_TIMEOUT               1
  UNMIGRATED  DD_PROFILING_URL                          1

[pr-commenter]

Benchmarks

Benchmark execution time: 2026-10-06 21:06:25

Comparing candidate commit 2b55544 in PR branch apmapi-2121-otel-http-client-semantics with baseline commit b8712d3 in branch apmapi-2121-otel-http-attributes.

📊 Benchmarking dashboard

Found 0 performance improvements and 0 performance regressions! Performance is the same for 340 metrics, 1 unstable metrics, 1 known flaky benchmarks.

Explanation

This is an A/B test comparing a candidate commit's performance against that of a baseline commit. Performance changes are noted in the tables below as:

• 🟩 = significantly better candidate vs. baseline
• 🟥 = significantly worse candidate vs. baseline

We compute a confidence interval (CI) over the relative difference of means between metrics from the candidate and baseline commits, considering the baseline as the reference.

If the CI is entirely outside the configured SIGNIFICANT_IMPACT_THRESHOLD (or the deprecated UNCONFIDENCE_THRESHOLD), the change is considered significant.

Feel free to reach out to #apm-benchmarking-platform on Slack if you have any questions.

More details about the CI and significant changes

You can imagine this CI as a range of values that is likely to contain the true difference of means between the candidate and baseline commits.

CIs of the difference of means are often centered around 0%, because often changes are not that big:

---------------------------------(------|---^--------)-------------------------------->
                              -0.6%    0%  0.3%     +1.2%
                                 |          |        |
         lower bound of the CI --'          |        |
sample mean (center of the CI) -------------'        |
         upper bound of the CI ----------------------'

As described above, a change is considered significant if the CI is entirely outside the configured SIGNIFICANT_IMPACT_THRESHOLD (or the deprecated UNCONFIDENCE_THRESHOLD).

For instance, for an execution time metric, this confidence interval indicates a significantly worse performance:

----------------------------------------|---------|---(---------^---------)---------->
                                       0%        1%  1.3%      2.2%      3.1%
                                                  |   |         |         |
       significant impact threshold --------------'   |         |         |
                      lower bound of CI --------------'         |         |
       sample mean (center of the CI) --------------------------'         |
                      upper bound of CI ----------------------------------'

Unstable benchmarks

These benchmarks have a confidence interval too wide to call a change; treat them as noise rather than signal.

scenario:BenchmarkContextWithSpan/detach-no-snapshot

• unstable execution_time [-1.449ns; +1.737ns] or [-4.968%; +5.956%]

Known flaky benchmarks

These benchmarks are marked as flaky and will not trigger a failure. Modify FLAKY_BENCHMARKS_REGEX to control which benchmarks are marked as flaky.

scenario:BenchmarkOTLPTraceWriterFlush

• 🟩 execution_time [-2.678µs; -1.764µs] or [-3.775%; -2.487%]

[Copilot]

Pull request overview

Adds OpenTelemetry HTTP client semantics to net/http instrumentation and aligns configuration, OTLP export, naming, and trace metrics.

Changes:

• Emits OTel HTTP client attributes, names, and error semantics.
• Applies global OTel-mode configuration overrides and typed OTLP attributes.
• Adds unit, system-test support, and benchmark coverage.

Reviewed changes

Copilot reviewed 29 out of 29 changed files in this pull request and generated 7 comments.

Show a summary per file

File	Description
internal/namingschema/namingschema.go	Loads effective schema from config.
internal/namingschema/namingschema_test.go	Tests schema refresh and overrides.
internal/config/config.go	Applies OTel configuration overrides.
internal/config/config_test.go	Tests override behavior and telemetry.
instrumentation/internal/namingschema/namingschema.go	Uses effective schema configuration.
instrumentation/internal/namingschema/namingschema_test.go	Tests OTel schema selection.
instrumentation/instrumentation.go	Exposes OTel semantics state.
instrumentation/instrumentation_test.go	Tests semantics state access.
instrumentation/httptrace/method.go	Normalizes HTTP methods.
instrumentation/httptrace/method_test.go	Tests method normalization.
ddtrace/tracer/stats.go	Reads OTel HTTP methods for stats.
ddtrace/tracer/stats_test.go	Tests OTel trace metrics.
ddtrace/tracer/spancontext_test.go	Tests peer-service suppression.
ddtrace/tracer/span_to_otlp.go	Converts semantic attributes to OTLP types.
ddtrace/tracer/span_to_otlp_test.go	Tests semantic OTLP conversion.
ddtrace/tracer/option.go	Loads naming from effective config.
ddtrace/tracer/option_test.go	Tests option overrides.
ddtrace/tracer/doc.go	Documents OTel semantics mode.
ddtrace/opentelemetry/span_test.go	Validates direct OTLP output.
ddtrace/ext/tags.go	Adds OTel HTTP attribute constants.
contrib/net/http/roundtripper_test.go	Tests client semantic behavior.
contrib/net/http/option.go	Configures OTel client defaults.
contrib/net/http/internal/wrap/roundtrip.go	Emits semantic request and response tags.
contrib/net/http/internal/wrap/roundtrip_test.go	Tests semantic tags and addressing.
contrib/net/http/internal/orchestrion/roundtrip.go	Adds semantics to auto-instrumentation.
contrib/net/http/internal/orchestrion/roundtrip_test.go	Tests Orchestrion defaults.
contrib/net/http/internal/config/config.go	Defines client error-status behavior.
contrib/net/http/internal/config/config_test.go	Tests status predicates.
.gitlab/benchmarks/micro/gitlab-ci.yml	Registers the new benchmark.

---

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[Copilot]

Pull request overview

Copilot reviewed 32 out of 32 changed files in this pull request and generated no new comments.

Suppressed comments (2)

contrib/net/http/internal/wrap/roundtrip.go:245

• OTel response handling never records resp.Proto, so normal client spans omit the known network.protocol.version (and a non-HTTP network.protocol.name). These are part of the HTTP response attributes emitted by the OpenTelemetry-Go reference named in the PR; add them before finishing the span and cover HTTP/1.1 and HTTP/2 responses.

			if cfg.OTelSemanticsEnabled {
				span.SetTag(ext.HTTPResponseStatusCode, statusCode)
			} else {
				span.SetTag(ext.HTTPCode, statusCode)
			}

internal/config/config.go:492

• parseSpanAttributeSchema already logs invalid values in internal/config/config_helpers.go:158, so this branch guarantees two warnings for one bad setting. The new test only counts this new message and therefore misses the existing “invalid value, ignoring” warning. Keep warning ownership in one layer and assert that only one warning is emitted.

		} else {
			log.Warn("DD_TRACE_SPAN_ATTRIBUTE_SCHEMA=%s is not a valid value, setting to default of v0", schemaStr)

[rarguelloF]

+1 on @genesor and @darccio comments

(added an additional one about noisy CONTRIBUTING.md changes)

[datadog-datadog-prod-us1]

More details

Targeted validation supports the opt-in HTTP client semantics, including integer OTLP attributes and method statistics, while preserving default Datadog behavior.

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[marcotc]

/merge

[gh-worker-devflow-routing-ef8351]

View all feedbacks in Devflow UI.

2026-10-07 19:45:18 UTC ℹ️ Start processing command /merge

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2026-10-07 19:45:22 UTC ℹ️ MergeQueue: pull request added to the queue

The expected merge time in main is approximately 37m (p90).

---

2026-10-07 20:06:58 UTC ℹ️ MergeQueue: This merge request was merged