diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1ebd56e3531..fe3600e8d15 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,90 @@
 
 ## Unreleased
 
+### API
+
+* Add null guards and API usage logging for tracing, metrics, propagation, and context APIs
+  ([#8913](https://github.com/open-telemetry/opentelemetry-java/pull/8913), [#8968](https://github.com/open-telemetry/opentelemetry-java/pull/8968))
+* Add stable `io.opentelemetry.api.impl.Base16EncodingUtils` and `TemporaryBuffers` utilities
+  ([#8929](https://github.com/open-telemetry/opentelemetry-java/pull/8929), [#8955](https://github.com/open-telemetry/opentelemetry-java/pull/8955))
+* Fix uncompilable Javadoc examples in context APIs
+  ([#8934](https://github.com/open-telemetry/opentelemetry-java/pull/8934))
+
+#### Incubating
+
+* Avoid false type warnings in `DeclarativeConfigProperties.toMap()`
+  ([#8921](https://github.com/open-telemetry/opentelemetry-java/pull/8921))
+
+#### Extensions
+
+* Trace propagators: Handle malformed URL escapes in Jaeger headers
+  ([#8912](https://github.com/open-telemetry/opentelemetry-java/pull/8912))
+* Trace propagators: Include the B3 debug header in multi-header propagation fields
+  ([#8930](https://github.com/open-telemetry/opentelemetry-java/pull/8930))
+* Trace propagators: Fix hexadecimal flag parsing in Jaeger headers
+  ([#8975](https://github.com/open-telemetry/opentelemetry-java/pull/8975))
+
+### SDK
+
+* Remove cross-module internal utility dependencies from resource and retry code
+  ([#8916](https://github.com/open-telemetry/opentelemetry-java/pull/8916))
+* Add experimental `SdkResourceProvider` support shared by tracer, meter, and logger providers
+  ([#8865](https://github.com/open-telemetry/opentelemetry-java/pull/8865))
+
+#### Traces
+
+* Retain invalid span links with attributes or trace state
+  ([#8917](https://github.com/open-telemetry/opentelemetry-java/pull/8917))
+
+#### Metrics
+
+* Use a dedicated export worker in `PeriodicMetricReader`, queue concurrent flushes, and add `setExporterTimeout()` with a default equal to the export interval
+  ([#8827](https://github.com/open-telemetry/opentelemetry-java/pull/8827))
+
+#### Exporters
+
+* Logging: Fall back to the observed timestamp in `SystemOutLogRecordExporter` when the timestamp is unset
+  ([#8944](https://github.com/open-telemetry/opentelemetry-java/pull/8944))
+* OTLP: Close the JDK HTTP response body on unsupported `Content-Encoding`
+  ([#8962](https://github.com/open-telemetry/opentelemetry-java/pull/8962))
+* OTLP: Match the `Host` header case-insensitively in the managed-channel gRPC sender
+  ([#8957](https://github.com/open-telemetry/opentelemetry-java/pull/8957))
+* OTLP: Fix exporter metric server attributes for hosts that `java.net.URI` cannot parse
+  ([#8941](https://github.com/open-telemetry/opentelemetry-java/pull/8941))
+* OTLP: Pass the original exception to the JDK HTTP sender's error callback
+  ([#8963](https://github.com/open-telemetry/opentelemetry-java/pull/8963))
+* OTLP: Retry OkHttp gRPC exports on the current thread to avoid rejection by bounded executors
+  ([#8965](https://github.com/open-telemetry/opentelemetry-java/pull/8965))
+* OTLP: Restore per-attempt retry logging in the OkHttp gRPC sender
+  ([#8967](https://github.com/open-telemetry/opentelemetry-java/pull/8967))
+* OTLP: Correct exporter builder Javadoc
+  ([#8996](https://github.com/open-telemetry/opentelemetry-java/pull/8996))
+* OTLP: Accept `0` as no limit for maximum request body and message sizes
+  ([#8945](https://github.com/open-telemetry/opentelemetry-java/pull/8945))
+* OTLP: gRPC exporter internal telemetry uses `rpc.status_code` instead of
+  `rpc.response.status.code` when `InternalTelemetryVersion` is set to `LATEST`
+  ([#9007](https://github.com/open-telemetry/opentelemetry-java/pull/9007))
+* Prometheus: Give exemplar `trace_id` and `span_id` precedence over filtered attributes
+  ([#8959](https://github.com/open-telemetry/opentelemetry-java/pull/8959))
+
+#### Extensions
+
+* **BREAKING** Incubator: Change `SamplingIntent.create()` and `getTraceStateUpdater()` from `Function` to `BiFunction` accepting the final `SamplingDecision`, and fix consistent sampling corner cases
+  ([#8952](https://github.com/open-telemetry/opentelemetry-java/pull/8952))
+* Autoconfigure: Match environment variables for configuration keys containing underscores
+  ([#8933](https://github.com/open-telemetry/opentelemetry-java/pull/8933), [#8951](https://github.com/open-telemetry/opentelemetry-java/pull/8951))
+* Autoconfigure: Support `PeriodicMetricReader` batch sizes through `otel.metric.export.max.batch.size`
+  ([#8935](https://github.com/open-telemetry/opentelemetry-java/pull/8935))
+* Autoconfigure: Correct SPI Javadoc
+  ([#8900](https://github.com/open-telemetry/opentelemetry-java/pull/8900))
+
+#### Testing
+
+* Add fluent metric point assertions to `MetricAssert`
+  ([#8994](https://github.com/open-telemetry/opentelemetry-java/pull/8994))
+* Add a builder supporting aggregation temporality selectors to `InMemoryMetricExporter`
+  ([#8993](https://github.com/open-telemetry/opentelemetry-java/pull/8993))
+
 ## Version 1.67.0 (2026-10-09)
 
 ### API
diff --git a/api/all/src/main/java/io/opentelemetry/api/impl/Base16EncodingUtils.java b/api/all/src/main/java/io/opentelemetry/api/impl/Base16EncodingUtils.java
index a0a236247fd..d25e90208b9 100644
--- a/api/all/src/main/java/io/opentelemetry/api/impl/Base16EncodingUtils.java
+++ b/api/all/src/main/java/io/opentelemetry/api/impl/Base16EncodingUtils.java
@@ -12,6 +12,8 @@
  *
  * <p>This class is not intended for use by application developers. Its API is stable and will not
  * be changed or removed in a backwards-incompatible manner.
+ *
+ * @since 1.68.0
  */
 public final class Base16EncodingUtils {
 
diff --git a/api/all/src/main/java/io/opentelemetry/api/impl/TemporaryBuffers.java b/api/all/src/main/java/io/opentelemetry/api/impl/TemporaryBuffers.java
index 10474037573..c3a6a1c2c82 100644
--- a/api/all/src/main/java/io/opentelemetry/api/impl/TemporaryBuffers.java
+++ b/api/all/src/main/java/io/opentelemetry/api/impl/TemporaryBuffers.java
@@ -14,6 +14,8 @@
  *
  * <p>This class is not intended for use by application developers. Its API is stable and will not
  * be changed or removed in a backwards-incompatible manner.
+ *
+ * @since 1.68.0
  */
 public final class TemporaryBuffers {
 
diff --git a/sdk/metrics/src/main/java/io/opentelemetry/sdk/metrics/export/PeriodicMetricReaderBuilder.java b/sdk/metrics/src/main/java/io/opentelemetry/sdk/metrics/export/PeriodicMetricReaderBuilder.java
index aa8eab4bf95..e0d7e342425 100644
--- a/sdk/metrics/src/main/java/io/opentelemetry/sdk/metrics/export/PeriodicMetricReaderBuilder.java
+++ b/sdk/metrics/src/main/java/io/opentelemetry/sdk/metrics/export/PeriodicMetricReaderBuilder.java
@@ -65,6 +65,8 @@ public PeriodicMetricReaderBuilder setInterval(Duration interval) {
    *
    * <p>When {@link #setMaxExportBatchSize(int)} is configured, the timeout applies to each
    * individual export(batch) invocation, not the aggregate export cycle.
+   *
+   * @since 1.68.0
    */
   public PeriodicMetricReaderBuilder setExporterTimeout(long timeout, TimeUnit unit) {
     requireNonNull(unit, "unit");
@@ -80,6 +82,8 @@ public PeriodicMetricReaderBuilder setExporterTimeout(long timeout, TimeUnit uni
    *
    * <p>When {@link #setMaxExportBatchSize(int)} is configured, the timeout applies to each
    * individual export(batch) invocation, not the aggregate export cycle.
+   *
+   * @since 1.68.0
    */
   public PeriodicMetricReaderBuilder setExporterTimeout(Duration timeout) {
     requireNonNull(timeout, "timeout");
diff --git a/sdk/testing/src/main/java/io/opentelemetry/sdk/testing/assertj/MetricAssert.java b/sdk/testing/src/main/java/io/opentelemetry/sdk/testing/assertj/MetricAssert.java
index 9b4e3cc9dbc..bcc2af929c1 100644
--- a/sdk/testing/src/main/java/io/opentelemetry/sdk/testing/assertj/MetricAssert.java
+++ b/sdk/testing/src/main/java/io/opentelemetry/sdk/testing/assertj/MetricAssert.java
@@ -125,6 +125,8 @@ public MetricAssert hasDoubleGaugeSatisfying(Consumer<DoubleGaugeAssert> asserti
   /**
    * Asserts this {@link MetricData} is a double gauge with points matching all of the given
    * assertions and no more, in any order.
+   *
+   * @since 1.68.0
    */
   @SafeVarargs
   @SuppressWarnings("varargs")
@@ -136,6 +138,8 @@ public final MetricAssert hasDoubleGaugePointsSatisfying(
   /**
    * Asserts this {@link MetricData} is a double gauge with points matching all of the given
    * assertions and no more, in any order.
+   *
+   * @since 1.68.0
    */
   public MetricAssert hasDoubleGaugePointsSatisfying(
       Iterable<? extends Consumer<DoublePointAssert>> assertions) {
@@ -162,6 +166,8 @@ public MetricAssert hasLongGaugeSatisfying(Consumer<LongGaugeAssert> assertion)
   /**
    * Asserts this {@link MetricData} is a long gauge with points matching all of the given
    * assertions and no more, in any order.
+   *
+   * @since 1.68.0
    */
   @SafeVarargs
   @SuppressWarnings("varargs")
@@ -172,6 +178,8 @@ public final MetricAssert hasLongGaugePointsSatisfying(Consumer<LongPointAssert>
   /**
    * Asserts this {@link MetricData} is a long gauge with points matching all of the given
    * assertions and no more, in any order.
+   *
+   * @since 1.68.0
    */
   public MetricAssert hasLongGaugePointsSatisfying(
       Iterable<? extends Consumer<LongPointAssert>> assertions) {
@@ -196,6 +204,8 @@ public MetricAssert hasDoubleSumSatisfying(Consumer<DoubleSumAssert> assertion)
   /**
    * Asserts this {@link MetricData} is a double sum with points matching all of the given
    * assertions and no more, in any order.
+   *
+   * @since 1.68.0
    */
   @SafeVarargs
   @SuppressWarnings("varargs")
@@ -207,6 +217,8 @@ public final MetricAssert hasDoubleSumPointsSatisfying(
   /**
    * Asserts this {@link MetricData} is a double sum with points matching all of the given
    * assertions and no more, in any order.
+   *
+   * @since 1.68.0
    */
   public MetricAssert hasDoubleSumPointsSatisfying(
       Iterable<? extends Consumer<DoublePointAssert>> assertions) {
@@ -231,6 +243,8 @@ public MetricAssert hasLongSumSatisfying(Consumer<LongSumAssert> assertion) {
   /**
    * Asserts this {@link MetricData} is a long sum with points matching all of the given assertions
    * and no more, in any order.
+   *
+   * @since 1.68.0
    */
   @SafeVarargs
   @SuppressWarnings("varargs")
@@ -241,6 +255,8 @@ public final MetricAssert hasLongSumPointsSatisfying(Consumer<LongPointAssert>..
   /**
    * Asserts this {@link MetricData} is a long sum with points matching all of the given assertions
    * and no more, in any order.
+   *
+   * @since 1.68.0
    */
   public MetricAssert hasLongSumPointsSatisfying(
       Iterable<? extends Consumer<LongPointAssert>> assertions) {
@@ -265,6 +281,8 @@ public MetricAssert hasHistogramSatisfying(Consumer<HistogramAssert> assertion)
   /**
    * Asserts this {@link MetricData} is a histogram with points matching all of the given assertions
    * and no more, in any order.
+   *
+   * @since 1.68.0
    */
   @SafeVarargs
   @SuppressWarnings("varargs")
@@ -276,6 +294,8 @@ public final MetricAssert hasHistogramPointsSatisfying(
   /**
    * Asserts this {@link MetricData} is a histogram with points matching all of the given assertions
    * and no more, in any order.
+   *
+   * @since 1.68.0
    */
   public MetricAssert hasHistogramPointsSatisfying(
       Iterable<? extends Consumer<HistogramPointAssert>> assertions) {
@@ -306,6 +326,8 @@ public MetricAssert hasExponentialHistogramSatisfying(
   /**
    * Asserts this {@link MetricData} is an exponential histogram with points matching all of the
    * given assertions and no more, in any order.
+   *
+   * @since 1.68.0
    */
   @SafeVarargs
   @SuppressWarnings("varargs")
@@ -318,6 +340,8 @@ public final MetricAssert hasExponentialHistogramPointsSatisfying(
   /**
    * Asserts this {@link MetricData} is an exponential histogram with points matching all of the
    * given assertions and no more, in any order.
+   *
+   * @since 1.68.0
    */
   public MetricAssert hasExponentialHistogramPointsSatisfying(
       Iterable<? extends Consumer<ExponentialHistogramPointAssert>> assertions) {
@@ -343,6 +367,8 @@ public MetricAssert hasSummarySatisfying(Consumer<SummaryAssert> assertion) {
   /**
    * Asserts this {@link MetricData} is a summary with points matching all of the given assertions
    * and no more, in any order.
+   *
+   * @since 1.68.0
    */
   @SafeVarargs
   @SuppressWarnings("varargs")
@@ -353,6 +379,8 @@ public final MetricAssert hasSummaryPointsSatisfying(Consumer<SummaryPointAssert
   /**
    * Asserts this {@link MetricData} is a summary with points matching all of the given assertions
    * and no more, in any order.
+   *
+   * @since 1.68.0
    */
   public MetricAssert hasSummaryPointsSatisfying(
       Iterable<? extends Consumer<SummaryPointAssert>> assertions) {