Sourced from go.opentelemetry.io/otel's changelog.

[1.38.0/0.60.0/0.14.0/0.0.13] 2025-08-29

This release is the last to support [Go 1.23]. The next release will require at least [Go 1.24].

Added

• Add native histogram exemplar support in go.opentelemetry.io/otel/exporters/prometheus. (#6772)
• Add template attribute functions to the go.opentelmetry.io/otel/semconv/v1.34.0 package. (#6939)
  • ContainerLabel
  • DBOperationParameter
  • DBSystemParameter
  • HTTPRequestHeader
  • HTTPResponseHeader
  • K8SCronJobAnnotation
  • K8SCronJobLabel
  • K8SDaemonSetAnnotation
  • K8SDaemonSetLabel
  • K8SDeploymentAnnotation
  • K8SDeploymentLabel
  • K8SJobAnnotation
  • K8SJobLabel
  • K8SNamespaceAnnotation
  • K8SNamespaceLabel
  • K8SNodeAnnotation
  • K8SNodeLabel
  • K8SPodAnnotation
  • K8SPodLabel
  • K8SReplicaSetAnnotation
  • K8SReplicaSetLabel
  • K8SStatefulSetAnnotation
  • K8SStatefulSetLabel
  • ProcessEnvironmentVariable
  • RPCConnectRPCRequestMetadata
  • RPCConnectRPCResponseMetadata
  • RPCGRPCRequestMetadata
  • RPCGRPCResponseMetadata
• Add ErrorType attribute helper function to the go.opentelmetry.io/otel/semconv/v1.34.0 package. (#6962)
• Add WithAllowKeyDuplication in go.opentelemetry.io/otel/sdk/log which can be used to disable deduplication for log records. (#6968)
• Add WithCardinalityLimit option to configure the cardinality limit in go.opentelemetry.io/otel/sdk/metric. (#6996, #7065, #7081, #7164, #7165, #7179)
• Add Clone method to Record in go.opentelemetry.io/otel/log that returns a copy of the record with no shared state. (#7001)
• Add experimental self-observability span and batch span processor metrics in go.opentelemetry.io/otel/sdk/trace. Check the go.opentelemetry.io/otel/sdk/trace/internal/x package documentation for more information. (#7027, #6393, #7209)
• The go.opentelemetry.io/otel/semconv/v1.36.0 package. The package contains semantic conventions from the v1.36.0 version of the OpenTelemetry Semantic Conventions. See the migration documentation for information on how to upgrade from go.opentelemetry.io/otel/semconv/v1.34.0.(#7032, #7041)
• Add support for configuring Prometheus name translation using WithTranslationStrategy option in go.opentelemetry.io/otel/exporters/prometheus. The current default translation strategy when UTF-8 mode is enabled is NoUTF8EscapingWithSuffixes, but a future release will change the default strategy to UnderscoreEscapingWithSuffixes for compliance with the specification. (#7111)
• Add experimental self-observability log metrics in go.opentelemetry.io/otel/sdk/log. Check the go.opentelemetry.io/otel/sdk/log/internal/x package documentation for more information. (#7121)
• Add experimental self-observability trace exporter metrics in go.opentelemetry.io/otel/exporters/stdout/stdouttrace.

... (truncated)

• 84e3f3a Release v1.38.0 (#7271)
• 18424a4 Add tests for attribute JSON marshalling (#7268)
• 9798759 Statically define trace observability attributes (#7263)
• be1e57f Refactor BSP observability setup (#7264)
• d99c68c chore(deps): update module github.com/mgechev/revive to v1.12.0 (#7269)
• 0724539 Add benchmark for set equality (#7262)
• 5358fd7 Upgrade semconv dependencies to v1.37.0 (#7260)
• 25d0274 fix(deps): update module github.com/stretchr/testify to v1.11.1 (#7261)
• d0cab86 prometheus: Add support for setting Translation Strategy config option (#7111)
• 3342341 Generate the semconv/v1.37.0 packages (#7254)
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