diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 77c0d292c..d6a5f76bd 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-    ".": "0.7.0"
+    ".": "0.8.0"
 }
diff --git a/CHANGELOG.md b/CHANGELOG.md
index b10bad3ce..6d5b9e5eb 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,49 @@
 # Changelog
 
+## [0.8.0](https://github.com/google/adk-java/compare/v0.7.0...v0.8.0) (2026-03-06)
+
+
+### ⚠ BREAKING CHANGES
+
+* remove methods with Optional params from LiveRequest.Builder
+* remove deprecated methods accepting Optional params in InvocationContext
+* remove deprecated BaseToolset.isToolSelected method
+* remove Optional parameters from LlmResponse.Builder's methods
+* remove support for legacy `transferToAgent`, superseded by `transfer_to_agent`
+
+### Features
+
+* add callbacks functionality to the agent executor ([7e8f9dc](https://github.com/google/adk-java/commit/7e8f9dcf82fe7e62aee625fbfaa8673d238ff184))
+* add example on how to expose agent via A2A protocol ([e3ea378](https://github.com/google/adk-java/commit/e3ea378051e5c4e5e5031657467145779e42db55))
+* Adding a Builder for EventsCompactionConfig ([05fbcfc](https://github.com/google/adk-java/commit/05fbcfc933923ae711cd12e7fc9e587fd8e2685c))
+* Adding a SessionKey for typeSafety ([d899f6f](https://github.com/google/adk-java/commit/d899f6f4ad52c84cb4ac8c90d0dc88c22487029c))
+* Adding plugin(Plugin... p) helper methods on App and Runner builders ([dc1a192](https://github.com/google/adk-java/commit/dc1a192a81a92870aa5a4af27a9dc90e81cdaf67))
+* implement partial event aggregation in RemoteA2AAgent ([e064067](https://github.com/google/adk-java/commit/e0640673d212b9849d312953f192f8da51fae85b))
+* remove deprecated BaseToolset.isToolSelected method ([d2f1145](https://github.com/google/adk-java/commit/d2f11456c3a99edd43b3dc0d04743ae7e9390ded))
+* remove deprecated methods accepting Optional params in InvocationContext ([88153c8](https://github.com/google/adk-java/commit/88153c833697a9b9c6ec735a69f48a92cbdfc54b))
+* remove methods with Optional params from LiveRequest.Builder ([84c62a4](https://github.com/google/adk-java/commit/84c62a48ef7b62641722824fe5ba1200606b7b17))
+* remove Optional parameters from LlmResponse.Builder's methods ([a3ac436](https://github.com/google/adk-java/commit/a3ac436bcfa241e90c07485e5da918ec8dbc2b4a))
+
+
+### Bug Fixes
+
+* Allow injecting ObjectMapper in FunctionTool, default to ObjectMapper (re. [#473](https://github.com/google/adk-java/issues/473)) ([71b1070](https://github.com/google/adk-java/commit/71b10701e753bddaa96d5e6579b759d2b9bb3e92))
+* downgrade otel.version to 1.51.0 ([117fedf](https://github.com/google/adk-java/commit/117fedf672bb67c4b078ac75ee81a7710452c5b5))
+* Ensure Gemini 3.1 models have events correctly buffered ([acffdb9](https://github.com/google/adk-java/commit/acffdb96bcd8133af99cb0b9426665ba73a83bbc))
+* Exit from rearrangeEventsForLatestFunctionResponse if size of events is less than 2 ([5bc3ef8](https://github.com/google/adk-java/commit/5bc3ef89e62eb3f32ba7e45657c9e40c88c3a5e9))
+* Fixed issue where events were marked empty if the first part had an empty text; now checks all parts for meaningful content ([a0cba25](https://github.com/google/adk-java/commit/a0cba25d691f4be72bea22b0649ecf2d2c110736))
+* prepare JSON serialization for Jackson 2.20.2 and Spring Boot 4.0.2 upgrades ([8c6591b](https://github.com/google/adk-java/commit/8c6591bc4ad86c376cdd70e1bb64f359fbf22fe9))
+
+
+### Miscellaneous Chores
+
+* revert: switch release please secret to use adk-java-releases-bot's token ([7eafd1b](https://github.com/google/adk-java/commit/7eafd1bd9b16e9ed83dfbc3d0983cfc415c0aaec))
+
+
+### Code Refactoring
+
+* remove support for legacy `transferToAgent`, superseded by `transfer_to_agent` ([c1ccb2e](https://github.com/google/adk-java/commit/c1ccb2e9d375fedcd7dbb594300e66a1a0488a91))
+
 ## [0.7.0](https://github.com/google/adk-java/compare/v0.6.0...v0.7.0) (2026-02-27)
 
 
diff --git a/README.md b/README.md
index d0471c1bf..4a5dab81f 100644
--- a/README.md
+++ b/README.md
@@ -50,13 +50,13 @@ If you're using Maven, add the following to your dependencies:
 <dependency>
   <groupId>com.google.adk</groupId>
   <artifactId>google-adk</artifactId>
-  <version>0.7.0</version>
+  <version>0.8.0</version>
 </dependency>
 <!-- Dev UI -->
 <dependency>
     <groupId>com.google.adk</groupId>
     <artifactId>google-adk-dev</artifactId>
-    <version>0.7.0</version>
+    <version>0.8.0</version>
 </dependency>
 ```
 
diff --git a/a2a/pom.xml b/a2a/pom.xml
index 05c740067..0e969600e 100644
--- a/a2a/pom.xml
+++ b/a2a/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>com.google.adk</groupId>
     <artifactId>google-adk-parent</artifactId>
-    <version>0.7.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+    <version>0.8.0</version><!-- {x-version-update:google-adk:current} -->
   </parent>
 
   <artifactId>google-adk-a2a</artifactId>
diff --git a/contrib/firestore-session-service/pom.xml b/contrib/firestore-session-service/pom.xml
index d3d49e824..0b421e361 100644
--- a/contrib/firestore-session-service/pom.xml
+++ b/contrib/firestore-session-service/pom.xml
@@ -20,7 +20,7 @@
     <parent>
         <groupId>com.google.adk</groupId>
         <artifactId>google-adk-parent</artifactId>
-        <version>0.7.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+        <version>0.8.0</version><!-- {x-version-update:google-adk:current} -->
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/contrib/langchain4j/pom.xml b/contrib/langchain4j/pom.xml
index 330339440..75dc8b58e 100644
--- a/contrib/langchain4j/pom.xml
+++ b/contrib/langchain4j/pom.xml
@@ -20,7 +20,7 @@
     <parent>
         <groupId>com.google.adk</groupId>
         <artifactId>google-adk-parent</artifactId>
-        <version>0.7.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+        <version>0.8.0</version><!-- {x-version-update:google-adk:current} -->
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/contrib/samples/a2a_basic/pom.xml b/contrib/samples/a2a_basic/pom.xml
index fc666cd71..13c8e50b2 100644
--- a/contrib/samples/a2a_basic/pom.xml
+++ b/contrib/samples/a2a_basic/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>com.google.adk</groupId>
     <artifactId>google-adk-samples</artifactId>
-    <version>0.7.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+    <version>0.8.0</version><!-- {x-version-update:google-adk:current} -->
     <relativePath>..</relativePath>
   </parent>
 
diff --git a/contrib/samples/a2a_server/pom.xml b/contrib/samples/a2a_server/pom.xml
index d47a0c984..83a29727f 100644
--- a/contrib/samples/a2a_server/pom.xml
+++ b/contrib/samples/a2a_server/pom.xml
@@ -1,13 +1,11 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<project xmlns="http://maven.apache.org/POM/4.0.0"
-         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
   <modelVersion>4.0.0</modelVersion>
 
   <parent>
     <groupId>com.google.adk</groupId>
     <artifactId>google-adk-samples</artifactId>
-    <version>0.7.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+    <version>0.8.0</version><!-- {x-version-update:google-adk:current} -->
     <relativePath>..</relativePath>
   </parent>
 
diff --git a/contrib/samples/configagent/pom.xml b/contrib/samples/configagent/pom.xml
index 552a6d826..b9e90a0e0 100644
--- a/contrib/samples/configagent/pom.xml
+++ b/contrib/samples/configagent/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <groupId>com.google.adk</groupId>
         <artifactId>google-adk-samples</artifactId>
-        <version>0.7.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+        <version>0.8.0</version><!-- {x-version-update:google-adk:current} -->
         <relativePath>..</relativePath>
     </parent>
 
diff --git a/contrib/samples/helloworld/pom.xml b/contrib/samples/helloworld/pom.xml
index bff6b86a6..8dd9b3a85 100644
--- a/contrib/samples/helloworld/pom.xml
+++ b/contrib/samples/helloworld/pom.xml
@@ -20,7 +20,7 @@
     <parent>
         <groupId>com.google.adk</groupId>
         <artifactId>google-adk-samples</artifactId>
-        <version>0.7.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+        <version>0.8.0</version><!-- {x-version-update:google-adk:current} -->
         <relativePath>..</relativePath>
     </parent>
 
diff --git a/contrib/samples/mcpfilesystem/pom.xml b/contrib/samples/mcpfilesystem/pom.xml
index 3e221f5f6..f1514a0ee 100644
--- a/contrib/samples/mcpfilesystem/pom.xml
+++ b/contrib/samples/mcpfilesystem/pom.xml
@@ -20,7 +20,7 @@
     <parent>
         <groupId>com.google.adk</groupId>
         <artifactId>google-adk-parent</artifactId>
-        <version>0.7.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+        <version>0.8.0</version><!-- {x-version-update:google-adk:current} -->
         <relativePath>../../..</relativePath>
     </parent>
 
diff --git a/contrib/samples/pom.xml b/contrib/samples/pom.xml
index f3c8359b8..413bd9722 100644
--- a/contrib/samples/pom.xml
+++ b/contrib/samples/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>com.google.adk</groupId>
     <artifactId>google-adk-parent</artifactId>
-    <version>0.7.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+    <version>0.8.0</version><!-- {x-version-update:google-adk:current} -->
     <relativePath>../..</relativePath>
   </parent>
 
diff --git a/contrib/spring-ai/pom.xml b/contrib/spring-ai/pom.xml
index e07deec9e..c80428650 100644
--- a/contrib/spring-ai/pom.xml
+++ b/contrib/spring-ai/pom.xml
@@ -20,7 +20,7 @@
     <parent>
         <groupId>com.google.adk</groupId>
         <artifactId>google-adk-parent</artifactId>
-        <version>0.7.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+        <version>0.8.0</version><!-- {x-version-update:google-adk:current} -->
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/core/pom.xml b/core/pom.xml
index 93c72e745..b455a9fc8 100644
--- a/core/pom.xml
+++ b/core/pom.xml
@@ -20,7 +20,7 @@
   <parent>
     <groupId>com.google.adk</groupId>
     <artifactId>google-adk-parent</artifactId>
-    <version>0.7.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+    <version>0.8.0</version><!-- {x-version-update:google-adk:current} -->
   </parent>
 
   <artifactId>google-adk</artifactId>
diff --git a/core/src/main/java/com/google/adk/Version.java b/core/src/main/java/com/google/adk/Version.java
index 10219a31b..1dc0282c3 100644
--- a/core/src/main/java/com/google/adk/Version.java
+++ b/core/src/main/java/com/google/adk/Version.java
@@ -22,7 +22,7 @@
  */
 public final class Version {
   // Don't touch this, release-please should keep it up to date.
-  public static final String JAVA_ADK_VERSION = "0.7.0"; // x-release-please-released-version
+  public static final String JAVA_ADK_VERSION = "0.8.0"; // x-release-please-released-version
 
   private Version() {}
 }
diff --git a/dev/pom.xml b/dev/pom.xml
index 6a0a03467..825d4b1cf 100644
--- a/dev/pom.xml
+++ b/dev/pom.xml
@@ -18,7 +18,7 @@
   <parent>
     <groupId>com.google.adk</groupId>
     <artifactId>google-adk-parent</artifactId>
-    <version>0.7.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+    <version>0.8.0</version><!-- {x-version-update:google-adk:current} -->
   </parent>
 
   <artifactId>google-adk-dev</artifactId>
diff --git a/maven_plugin/examples/custom_tools/pom.xml b/maven_plugin/examples/custom_tools/pom.xml
index 73e53e480..03978de9a 100644
--- a/maven_plugin/examples/custom_tools/pom.xml
+++ b/maven_plugin/examples/custom_tools/pom.xml
@@ -4,7 +4,7 @@
 
     <groupId>com.example</groupId>
     <artifactId>custom-tools-example</artifactId>
-    <version>0.7.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+    <version>0.8.0</version><!-- {x-version-update:google-adk:current} -->
     <packaging>jar</packaging>
 
     <name>ADK Custom Tools Example</name>
diff --git a/maven_plugin/examples/simple-agent/pom.xml b/maven_plugin/examples/simple-agent/pom.xml
index 8b6c14c26..eaf4be09b 100644
--- a/maven_plugin/examples/simple-agent/pom.xml
+++ b/maven_plugin/examples/simple-agent/pom.xml
@@ -4,7 +4,7 @@
 
     <groupId>com.example</groupId>
     <artifactId>simple-adk-agent</artifactId>
-    <version>0.7.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+    <version>0.8.0</version><!-- {x-version-update:google-adk:current} -->
     <packaging>jar</packaging>
 
     <name>Simple ADK Agent Example</name>
diff --git a/maven_plugin/pom.xml b/maven_plugin/pom.xml
index 373c6775d..3e09e863a 100644
--- a/maven_plugin/pom.xml
+++ b/maven_plugin/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <groupId>com.google.adk</groupId>
         <artifactId>google-adk-parent</artifactId>
-        <version>0.7.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+        <version>0.8.0</version><!-- {x-version-update:google-adk:current} -->
         <relativePath>../pom.xml</relativePath>
     </parent>
 
diff --git a/pom.xml b/pom.xml
index 34bef7755..d985cf33f 100644
--- a/pom.xml
+++ b/pom.xml
@@ -17,7 +17,7 @@
 
   <groupId>com.google.adk</groupId>
   <artifactId>google-adk-parent</artifactId>
-  <version>0.7.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+  <version>0.8.0</version><!-- {x-version-update:google-adk:current} -->
   <packaging>pom</packaging>
 
   <name>Google Agent Development Kit Maven Parent POM</name>
@@ -495,13 +495,13 @@
                   <checkstyleRules>
                     <module name="Checker">
                       <module name="TreeWalker">
-                        <module name="SuppressWarningsHolder" />
+                        <module name="SuppressWarningsHolder"/>
                         <module name="IllegalType">
-                          <property name="illegalClassNames" value="java.util.Optional" />
-                          <property name="tokens" value="PARAMETER_DEF" />
+                          <property name="illegalClassNames" value="java.util.Optional"/>
+                          <property name="tokens" value="PARAMETER_DEF"/>
                         </module>
                       </module>
-                      <module name="SuppressWarningsFilter" />
+                      <module name="SuppressWarningsFilter"/>
                     </module>
                   </checkstyleRules>
                 </configuration>
diff --git a/tutorials/city-time-weather/pom.xml b/tutorials/city-time-weather/pom.xml
index ef0c8f991..5e641b44c 100644
--- a/tutorials/city-time-weather/pom.xml
+++ b/tutorials/city-time-weather/pom.xml
@@ -20,7 +20,7 @@
   <parent>
     <groupId>com.google.adk</groupId>
     <artifactId>google-adk-parent</artifactId>
-    <version>0.7.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+    <version>0.8.0</version><!-- {x-version-update:google-adk:current} -->
     <relativePath>../../pom.xml</relativePath>
   </parent>
 
diff --git a/tutorials/live-audio-single-agent/pom.xml b/tutorials/live-audio-single-agent/pom.xml
index 77a3f3b55..9efd6489a 100644
--- a/tutorials/live-audio-single-agent/pom.xml
+++ b/tutorials/live-audio-single-agent/pom.xml
@@ -20,7 +20,7 @@
   <parent>
     <groupId>com.google.adk</groupId>
     <artifactId>google-adk-parent</artifactId>
-    <version>0.7.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+    <version>0.8.0</version><!-- {x-version-update:google-adk:current} -->
     <relativePath>../../pom.xml</relativePath>
   </parent>