PerfectSlayer · Oct 21, 2026 · Oct 22, 2026 · Oct 22, 2026 · Oct 22, 2026 · Oct 22, 2026
@@ -402,6 +402,7 @@
 /dd-java-agent/instrumentation/datadog/openfeature/  @DataDog/feature-flagging-and-experimentation-sdk
 /dd-openfeature/                                     @DataDog/feature-flagging-and-experimentation-sdk
 /dd-smoke-tests/openfeature/                         @DataDog/feature-flagging-and-experimentation-sdk
+/dd-smoke-tests/openfeature-legacy/                  @DataDog/feature-flagging-and-experimentation-sdk
 /products/feature-flagging/                          @DataDog/feature-flagging-and-experimentation-sdk
 
 # @DataDog/profiling-java

@@ -36,6 +36,8 @@
 1 datadog.opentracing.*
 1 datadog.slf4j.*
 1 datadog.trace.*
+# Legacy OpenFeature providers need compatibility advice after their bootstrap API was removed.
+0 datadog.trace.api.openfeature.Provider
 # remove this once https://github.com/raphw/byte-buddy/issues/558 is fixed
 0 datadog.trace.bootstrap.instrumentation.java.concurrent.RunnableWrapper
 1 datadog.trace.core.*

@@ -0,0 +1,26 @@
+import static org.gradle.api.JavaVersion.VERSION_11
+
+plugins {
+  id 'dd-trace-java.module.instrumentation'
+}
+
+// The providers released before the SDK bridge, linked to the agent bootstrap API it removed.
+muzzle {
+  pass {
+    group = 'com.datadoghq'
+    module = 'dd-openfeature'
+    versions = '[1.56.0,1.69.0)'
+  }
+}
+
+tracerJava {
+  addSourceSetFor(VERSION_11)
+}
+
+dependencies {
+  main_java11CompileOnly 'com.datadoghq:dd-openfeature:1.56.0'
+}
+
+tasks.named("compileMain_java11Java", JavaCompile) {
+  configureCompiler(it, VERSION_11)
+}
@@ -0,0 +1,127 @@
+# This is a Gradle generated file for dependency locking.
+# Manual edits can break the build and are not advised.
+# This file is expected to be part of source control.
+# To regenerate this file, run: ./gradlew :dd-java-agent:instrumentation:datadog:openfeature:dd-openfeature-1.56:dependencies --write-locks
+cafe.cryptography:curve25519-elisabeth:0.1.0=testRuntimeClasspath
+cafe.cryptography:ed25519-elisabeth:0.1.0=testRuntimeClasspath
+ch.qos.logback:logback-classic:1.2.13=testCompileClasspath,testRuntimeClasspath
+ch.qos.logback:logback-core:1.2.13=testCompileClasspath,testRuntimeClasspath
+com.blogspot.mydailyjava:weak-lock-free:0.17=buildTimeInstrumentationPlugin,compileClasspath,main_java11CompileClasspath,main_java11RuntimeClasspath,muzzleTooling,runtimeClasspath,testCompileClasspath,testRuntimeClasspath
+com.datadoghq.okhttp3:okhttp:3.12.15=testCompileClasspath,testRuntimeClasspath
+com.datadoghq.okio:okio:1.17.6=testCompileClasspath,testRuntimeClasspath
+com.datadoghq:dd-instrument-java:0.0.6=buildTimeInstrumentationPlugin,compileClasspath,main_java11CompileClasspath,main_java11RuntimeClasspath,muzzleBootstrap,muzzleTooling,runtimeClasspath,testCompileClasspath,testRuntimeClasspath
+com.datadoghq:dd-javac-plugin-client:0.2.2=buildTimeInstrumentationPlugin,compileClasspath,main_java11CompileClasspath,main_java11RuntimeClasspath,muzzleBootstrap,muzzleTooling,runtimeClasspath,testCompileClasspath,testRuntimeClasspath
+com.datadoghq:dd-openfeature:1.56.0=main_java11CompileClasspath
+com.datadoghq:dd-openfeature:1.67.0=legacySdk
+com.datadoghq:java-dogstatsd-client:4.4.5=testRuntimeClasspath
+com.datadoghq:sketches-java:0.8.3=testRuntimeClasspath
+com.github.javaparser:javaparser-core:3.25.6=codenarc
+com.github.jnr:jffi:1.3.15=testRuntimeClasspath
+com.github.jnr:jnr-a64asm:1.0.0=testRuntimeClasspath
+com.github.jnr:jnr-constants:0.10.4=testRuntimeClasspath
+com.github.jnr:jnr-enxio:0.32.20=testRuntimeClasspath
+com.github.jnr:jnr-ffi:2.2.19=testRuntimeClasspath
+com.github.jnr:jnr-posix:3.1.22=testRuntimeClasspath
+com.github.jnr:jnr-unixsocket:0.38.25=testRuntimeClasspath
+com.github.jnr:jnr-x86asm:1.0.2=testRuntimeClasspath
+com.github.spotbugs:spotbugs-annotations:4.10.4=compileClasspath,spotbugs
+com.github.spotbugs:spotbugs:4.10.4=spotbugs
+com.github.stephenc.jcip:jcip-annotations:1.0-1=spotbugs
+com.google.auto.service:auto-service-annotations:1.1.1=annotationProcessor,compileClasspath,testAnnotationProcessor,testCompileClasspath
+com.google.auto.service:auto-service:1.1.1=annotationProcessor,testAnnotationProcessor
+com.google.auto:auto-common:1.2.1=annotationProcessor,testAnnotationProcessor
+com.google.code.findbugs:jsr305:3.0.2=annotationProcessor,compileClasspath,spotbugs,testAnnotationProcessor,testCompileClasspath,testRuntimeClasspath
+com.google.code.gson:gson:2.14.0=spotbugs
+com.google.errorprone:error_prone_annotations:2.18.0=annotationProcessor,testAnnotationProcessor
+com.google.errorprone:error_prone_annotations:2.47.0=testCompileClasspath,testRuntimeClasspath
+com.google.errorprone:error_prone_annotations:2.48.0=spotbugs
+com.google.guava:failureaccess:1.0.1=annotationProcessor,testAnnotationProcessor
+com.google.guava:failureaccess:1.0.3=testCompileClasspath,testRuntimeClasspath
+com.google.guava:guava:32.0.1-jre=annotationProcessor,testAnnotationProcessor
+com.google.guava:guava:33.6.0-jre=testCompileClasspath,testRuntimeClasspath
+com.google.guava:listenablefuture:9999.0-empty-to-avoid-conflict-with-guava=annotationProcessor,testAnnotationProcessor,testCompileClasspath,testRuntimeClasspath
+com.google.j2objc:j2objc-annotations:2.8=annotationProcessor,testAnnotationProcessor
+com.google.j2objc:j2objc-annotations:3.1=testCompileClasspath,testRuntimeClasspath
+com.google.re2j:re2j:1.8=testRuntimeClasspath
+com.squareup.moshi:moshi:1.11.0=testCompileClasspath,testRuntimeClasspath
+com.squareup.okhttp3:logging-interceptor:3.12.12=testCompileClasspath,testRuntimeClasspath
+com.squareup.okhttp3:okhttp:3.12.12=testCompileClasspath,testRuntimeClasspath
+com.squareup.okio:okio:1.17.5=testCompileClasspath,testRuntimeClasspath
+com.thoughtworks.qdox:qdox:1.12.1=codenarc
+commons-fileupload:commons-fileupload:1.5=testCompileClasspath,testRuntimeClasspath
+commons-io:commons-io:2.11.0=testCompileClasspath,testRuntimeClasspath
+commons-io:commons-io:2.21.0=spotbugs
+de.thetaphi:forbiddenapis:3.11=compileClasspath,testCompileClasspath,testRuntimeClasspath
+dev.openfeature:sdk:1.18.2=main_java11CompileClasspath
+io.leangen.geantyref:geantyref:1.3.16=testRuntimeClasspath
+io.sqreen:libsqreen:17.5.0=testRuntimeClasspath
+javax.servlet:javax.servlet-api:3.1.0=testCompileClasspath,testRuntimeClasspath
+jaxen:jaxen:2.0.6=spotbugs
+junit:junit:4.13.2=testRuntimeClasspath
+net.bytebuddy:byte-buddy-agent:1.18.12=buildTimeInstrumentationPlugin,compileClasspath,main_java11CompileClasspath,main_java11RuntimeClasspath,muzzleTooling,runtimeClasspath,testCompileClasspath,testRuntimeClasspath
+net.bytebuddy:byte-buddy:1.18.12=buildTimeInstrumentationPlugin,compileClasspath,main_java11CompileClasspath,main_java11RuntimeClasspath,muzzleTooling,runtimeClasspath,testCompileClasspath,testRuntimeClasspath
+net.java.dev.jna:jna-platform:5.8.0=testRuntimeClasspath
+net.java.dev.jna:jna:5.8.0=testRuntimeClasspath
+net.sf.saxon:Saxon-HE:12.10=spotbugs
+org.apache.ant:ant-antlr:1.10.14=codenarc
+org.apache.ant:ant-junit:1.10.14=codenarc
+org.apache.bcel:bcel:6.12.0=spotbugs
+org.apache.commons:commons-lang3:3.20.0=spotbugs
+org.apache.commons:commons-text:1.15.0=spotbugs
+org.apache.logging.log4j:log4j-api:2.26.1=spotbugs
+org.apache.logging.log4j:log4j-core:2.26.1=spotbugs
+org.apiguardian:apiguardian-api:1.1.2=testCompileClasspath,testRuntimeClasspath
+org.checkerframework:checker-qual:3.33.0=annotationProcessor,testAnnotationProcessor
+org.codehaus.groovy:groovy-ant:3.0.23=codenarc
+org.codehaus.groovy:groovy-docgenerator:3.0.23=codenarc
+org.codehaus.groovy:groovy-groovydoc:3.0.23=codenarc
+org.codehaus.groovy:groovy-json:3.0.23=codenarc
+org.codehaus.groovy:groovy-json:3.0.25=testCompileClasspath,testRuntimeClasspath
+org.codehaus.groovy:groovy-templates:3.0.23=codenarc
+org.codehaus.groovy:groovy-xml:3.0.23=codenarc
+org.codehaus.groovy:groovy:3.0.23=codenarc
+org.codehaus.groovy:groovy:3.0.25=testCompileClasspath,testRuntimeClasspath
+org.codenarc:CodeNarc:3.7.0=codenarc
+org.dom4j:dom4j:2.2.0=spotbugs
+org.gmetrics:GMetrics:2.1.0=codenarc
+org.hamcrest:hamcrest-core:1.3=testRuntimeClasspath
+org.hamcrest:hamcrest:3.0=testCompileClasspath,testRuntimeClasspath
+org.jctools:jctools-core-jdk11:4.0.6=testRuntimeClasspath
+org.jctools:jctools-core:4.0.6=testRuntimeClasspath
+org.jspecify:jspecify:1.0.0=testCompileClasspath,testRuntimeClasspath
+org.junit.jupiter:junit-jupiter-api:5.14.1=testCompileClasspath,testRuntimeClasspath
+org.junit.jupiter:junit-jupiter-engine:5.14.1=testRuntimeClasspath
+org.junit.jupiter:junit-jupiter-params:5.14.1=testCompileClasspath,testRuntimeClasspath
+org.junit.jupiter:junit-jupiter:5.14.1=testCompileClasspath,testRuntimeClasspath
+org.junit.platform:junit-platform-commons:1.14.1=testCompileClasspath,testRuntimeClasspath
+org.junit.platform:junit-platform-engine:1.14.1=testCompileClasspath,testRuntimeClasspath
+org.junit.platform:junit-platform-launcher:1.14.1=testRuntimeClasspath
+org.junit.platform:junit-platform-runner:1.14.1=testRuntimeClasspath
+org.junit.platform:junit-platform-suite-api:1.14.1=testRuntimeClasspath
+org.junit.platform:junit-platform-suite-commons:1.14.1=testRuntimeClasspath
+org.junit:junit-bom:5.14.1=testCompileClasspath,testRuntimeClasspath
+org.mockito:mockito-core:4.4.0=testRuntimeClasspath
+org.objenesis:objenesis:3.3=testCompileClasspath,testRuntimeClasspath
+org.opentest4j:opentest4j:1.3.0=testCompileClasspath,testRuntimeClasspath
+org.ow2.asm:asm-analysis:9.10.1=spotbugs
+org.ow2.asm:asm-analysis:9.7.1=testRuntimeClasspath
+org.ow2.asm:asm-commons:9.10.1=spotbugs,testRuntimeClasspath
+org.ow2.asm:asm-tree:9.10.1=spotbugs,testRuntimeClasspath
+org.ow2.asm:asm-util:9.10.1=spotbugs
+org.ow2.asm:asm-util:9.7.1=testRuntimeClasspath
+org.ow2.asm:asm:9.10.1=buildTimeInstrumentationPlugin,compileClasspath,main_java11CompileClasspath,main_java11RuntimeClasspath,muzzleTooling,runtimeClasspath,spotbugs,testCompileClasspath,testRuntimeClasspath
+org.slf4j:jcl-over-slf4j:1.7.30=testCompileClasspath,testRuntimeClasspath
+org.slf4j:jul-to-slf4j:1.7.30=testCompileClasspath,testRuntimeClasspath
+org.slf4j:log4j-over-slf4j:1.7.30=testCompileClasspath,testRuntimeClasspath
+org.slf4j:slf4j-api:1.7.30=buildTimeInstrumentationPlugin,compileClasspath,main_java11RuntimeClasspath,muzzleBootstrap,muzzleTooling,runtimeClasspath
+org.slf4j:slf4j-api:1.7.32=testCompileClasspath,testRuntimeClasspath
+org.slf4j:slf4j-api:2.0.17=main_java11CompileClasspath,spotbugsSlf4j
+org.slf4j:slf4j-api:2.0.18=spotbugs
+org.slf4j:slf4j-simple:2.0.17=spotbugsSlf4j
+org.snakeyaml:snakeyaml-engine:2.9=buildTimeInstrumentationPlugin,main_java11RuntimeClasspath,muzzleTooling,runtimeClasspath,testRuntimeClasspath
+org.spockframework:spock-bom:2.4-groovy-3.0=testCompileClasspath,testRuntimeClasspath
+org.spockframework:spock-core:2.4-groovy-3.0=testCompileClasspath,testRuntimeClasspath
+org.tabletest:tabletest-junit:1.2.2=testCompileClasspath,testRuntimeClasspath
+org.tabletest:tabletest-parser:1.2.1=testCompileClasspath,testRuntimeClasspath
+org.xmlresolver:xmlresolver:5.3.3=spotbugs
+empty=main_java11AnnotationProcessor,spotbugsPlugins
@@ -0,0 +1,68 @@
+package datadog.trace.instrumentation.openfeature;
+
+import static datadog.trace.agent.tooling.bytebuddy.matcher.HierarchyMatchers.declaresMethod;
+import static datadog.trace.agent.tooling.bytebuddy.matcher.NameMatchers.named;
+import static datadog.trace.agent.tooling.bytebuddy.matcher.NameMatchers.namedOneOf;
+import static net.bytebuddy.matcher.ElementMatchers.takesArguments;
+
+import com.google.auto.service.AutoService;
+import datadog.trace.agent.tooling.Instrumenter;
+import datadog.trace.agent.tooling.InstrumenterModule;
+import java.util.Set;
+import net.bytebuddy.description.type.TypeDescription;
+import net.bytebuddy.matcher.ElementMatcher;
+
+/**
+ * Keeps legacy providers usable as default-value providers after their bootstrap API is removed.
+ */
+@SuppressWarnings("unused")
+@AutoService(InstrumenterModule.class)
+public class LegacyProviderInstrumentation extends InstrumenterModule
+    implements Instrumenter.ForSingleType,
+        Instrumenter.WithTypeStructure,
+        Instrumenter.HasMethodAdvice {
+  public LegacyProviderInstrumentation() {
+    super("openfeature");
+  }
+
+  @Override
+  protected boolean defaultEnabled() {
+    return true;
+  }
+
+  @Override
+  public boolean isApplicable(final Set<TargetSystem> enabledSystems) {
+    // Application safety must not depend on whether Feature Flags is enabled.
+    return true;
+  }
+
+  @Override
+  public String instrumentedType() {
+    return "datadog.trace.api.openfeature.Provider";
+  }
+
+  @Override
+  public ElementMatcher<TypeDescription> structureMatcher() {
+    // The current SDK's deprecated alias has no legacy evaluator to replace.
+    return declaresMethod(named("loadEvaluatorClass").and(takesArguments(0)));
+  }
+
+  @Override
+  public void methodAdvice(final MethodTransformer transformer) {
+    transformer.applyAdvice(
+        named("initialize").and(takesArguments(1)),
+        packageName + ".LegacyProviderAdvice$Initialize");
+    transformer.applyAdvice(
+        named("getProviderHooks").and(takesArguments(0)),
+        packageName + ".LegacyProviderAdvice$Hooks");
+    transformer.applyAdvice(
+        namedOneOf(
+                "getBooleanEvaluation",
+                "getStringEvaluation",
+                "getIntegerEvaluation",
+                "getDoubleEvaluation",
+                "getObjectEvaluation")
+            .and(takesArguments(3)),
+        packageName + ".LegacyProviderAdvice$Evaluation");
+  }
+}
@@ -0,0 +1,60 @@
+package datadog.trace.instrumentation.openfeature;
+
+import static java.util.Collections.emptyList;
+import static net.bytebuddy.asm.Advice.Argument;
+import static net.bytebuddy.asm.Advice.OnMethodEnter;
+import static net.bytebuddy.asm.Advice.OnMethodExit;
+import static net.bytebuddy.asm.Advice.OnNonDefaultValue;
+import static net.bytebuddy.asm.Advice.Return;
+
+import dev.openfeature.sdk.ErrorCode;
+import dev.openfeature.sdk.ProviderEvaluation;
+import dev.openfeature.sdk.Reason;
+import java.util.List;
+import org.slf4j.LoggerFactory;
+
+/** Avoids linking legacy evaluators to the removed agent bootstrap API. */
+@SuppressWarnings("unused")
+public class LegacyProviderAdvice {
+  public static class Initialize {
+    @OnMethodEnter(skipOn = OnNonDefaultValue.class)
+    public static boolean skipLegacyInitialization() {
+      return true;
+    }
+
+    @OnMethodExit(suppress = Throwable.class)
+    public static void warn() {
+      LoggerFactory.getLogger("datadog.trace.api.openfeature.Provider")
+          .warn(
+              "This dd-openfeature version is incompatible with the Datadog Java agent;"
+                  + " returning caller defaults. Upgrade dd-openfeature to enable Feature Flags.");
+    }
+  }
+
+  public static class Hooks {
+    @OnMethodExit(suppress = Throwable.class)
+    public static void returnNoHooks(@Return(readOnly = false) List<?> hooks) {
+      hooks = emptyList();
+    }
+  }
+
+  public static class Evaluation {
+    @OnMethodEnter(skipOn = OnNonDefaultValue.class)
+    public static boolean skipLegacyEvaluation() {
+      return true;
+    }
+
+    @OnMethodExit(suppress = Throwable.class)
+    public static void returnDefault(
+        @Argument(1) final Object defaultValue,
+        @Return(readOnly = false) ProviderEvaluation<?> evaluation) {
+      evaluation =
+          ProviderEvaluation.builder()
+              .value(defaultValue)
+              .reason(Reason.ERROR.name())
+              .errorCode(ErrorCode.PROVIDER_NOT_READY)
+              .errorMessage("Upgrade dd-openfeature to enable Feature Flags with this Java agent")
+              .build();
+    }
+  }
+}
@@ -0,0 +1,46 @@
+import static org.gradle.api.JavaVersion.VERSION_11
+
+import com.github.jengelman.gradle.plugins.shadow.tasks.ShadowJar
+
+plugins {
+  id 'application'
+  id 'com.gradleup.shadow'
+  id 'dd-trace-java.module.smoke-test'
+}
+
+description = 'Released dd-openfeature provider Smoke Tests.'
+
+testJvmConstraints {
+  minJavaVersion = VERSION_11
+}
+
+java {
+  toolchain {
+    languageVersion = JavaLanguageVersion.of(11)
+  }
+}
+
+tasks.withType(JavaCompile).configureEach {
+  configureCompiler(it, VERSION_11)
+}
+
+application {
+  mainClass = 'datadog.smoketest.openfeature.legacy.LegacyProviderApplication'
+}
+
+dependencies {
+  // A provider released before the SDK bridge, linked to the agent bootstrap API it removed.
+  implementation 'com.datadoghq:dd-openfeature:1.67.1'
+  testImplementation project(':dd-smoke-tests')
+}
+
+tasks.withType(Test).configureEach {
+  def shadowJarTask = tasks.named('shadowJar', ShadowJar)
+  dependsOn shadowJarTask
+  jvmArgumentProviders.add(new CommandLineArgumentProvider() {
+      @Override
+      Iterable<String> asArguments() {
+        return shadowJarTask.map { ["-Ddatadog.smoketest.shadowJar.path=${it.archiveFile.get()}"] }.get()
+      }
+    })
+}