diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 6180eb92e..a4f6ddcea 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-    ".": "1.5.0"
+    ".": "1.6.0"
 }
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 690eaf9b8..864e64dff 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,27 @@
 # Changelog
 
+## [1.6.0](https://github.com/google/adk-java/compare/v1.5.0...v1.6.0) (2026-06-26)
+
+
+### Features
+
+* Add ADK Issue Monitoring (Spam Detection) Agent sample for Java ([fd45dda](https://github.com/google/adk-java/commit/fd45dda7c07dfd241ff6650d41a323857bfd632e))
+* Add ADK Java Issue Triaging Agent sample ([fa94438](https://github.com/google/adk-java/commit/fa9443825bf9ecbaa6af5ee28f3fad8d162d74fa))
+* Add ADK PR Triaging Agent for google/adk-java ([f14f644](https://github.com/google/adk-java/commit/f14f6442c5a0f11d7772d8c47d92cc23013d0010))
+* Add chat-completions API support to ApigeeLlm ([df73784](https://github.com/google/adk-java/commit/df737840299cd2369a699abb4bd6028d7da1a630))
+* Add ClassPathSkillSource to load skills from the Java classpath ([587073a](https://github.com/google/adk-java/commit/587073a23ea781efd44990ad440b52caace3db4f))
+* Adds the ADK Stale Issue Auditor sample ([b6bd2dd](https://github.com/google/adk-java/commit/b6bd2dde4b1e26896815a23c686c9068b10e5397))
+* advance SequentialAgent to later sub-agents after a HITL resume when resumability is enabled ([407478b](https://github.com/google/adk-java/commit/407478bc131721c23318a3f8e8a06521490494e9))
+* Updated Spring AI to 2.0.0, ECJ, build works with Java 25 ([3f6665b](https://github.com/google/adk-java/commit/3f6665b2734d6c3a610c069f30fa305ea137f35a))
+
+
+### Bug Fixes
+
+* **core:** allow Long values to match INTEGER schema type ([a6d41cf](https://github.com/google/adk-java/commit/a6d41cff76682bc16b9871f3f3fd5a11cb1cccf9))
+* **gemini:** align streaming function-call handling with ADK Python ([37bb5e6](https://github.com/google/adk-java/commit/37bb5e6a7b01470d9f07a7b03ac3019bb7ddcc14))
+* map token usage metadata for Anthropic Claude model ([f76c5f9](https://github.com/google/adk-java/commit/f76c5f98ce15759723b1e21f4c0c6485a1c810fd))
+* Use existing secrets and built-in token in ADK docs release analyzer workflow ([456234f](https://github.com/google/adk-java/commit/456234f264f519796609bbfc0556932b34a7f7a0))
+
 ## [1.5.0](https://github.com/google/adk-java/compare/v1.4.0...v1.5.0) (2026-06-20)
 
 
diff --git a/README.md b/README.md
index 97cdf1910..f573b8e4c 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>1.5.0</version>
+  <version>1.6.0</version>
 </dependency>
 <!-- Dev UI -->
 <dependency>
     <groupId>com.google.adk</groupId>
     <artifactId>google-adk-dev</artifactId>
-    <version>1.5.0</version>
+    <version>1.6.0</version>
 </dependency>
 ```
 
diff --git a/a2a/pom.xml b/a2a/pom.xml
index 7e1973b08..9839518b8 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>1.5.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+    <version>1.6.0</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 e2b131604..8ee98a423 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>1.5.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+        <version>1.6.0</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 10a09d219..3538cedf3 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>1.5.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+        <version>1.6.0</version><!-- {x-version-update:google-adk:current} -->
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/contrib/planners/pom.xml b/contrib/planners/pom.xml
index e1a2c79e4..955f8c66a 100644
--- a/contrib/planners/pom.xml
+++ b/contrib/planners/pom.xml
@@ -20,7 +20,7 @@
     <parent>
         <groupId>com.google.adk</groupId>
         <artifactId>google-adk-parent</artifactId>
-        <version>1.5.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+        <version>1.6.0</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 210074fbd..efad538c1 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>1.5.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+    <version>1.6.0</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 34f4a4522..bba9e29af 100644
--- a/contrib/samples/a2a_server/pom.xml
+++ b/contrib/samples/a2a_server/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>com.google.adk</groupId>
     <artifactId>google-adk-samples</artifactId>
-    <version>1.5.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+    <version>1.6.0</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 ce4971247..19aaba508 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>1.5.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+        <version>1.6.0</version><!-- {x-version-update:google-adk:current} -->
         <relativePath>..</relativePath>
     </parent>
 
diff --git a/contrib/samples/github/adkprtriaging/pom.xml b/contrib/samples/github/adkprtriaging/pom.xml
index a398cc894..b2660c32f 100644
--- a/contrib/samples/github/adkprtriaging/pom.xml
+++ b/contrib/samples/github/adkprtriaging/pom.xml
@@ -20,7 +20,7 @@
     <parent>
         <groupId>com.google.adk</groupId>
         <artifactId>google-adk-samples</artifactId>
-        <version>1.5.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+        <version>1.6.0</version><!-- {x-version-update:google-adk:current} -->
         <relativePath>../..</relativePath>
     </parent>
 
diff --git a/contrib/samples/github/adkreleasedocs/pom.xml b/contrib/samples/github/adkreleasedocs/pom.xml
index c775c945d..5831277df 100644
--- a/contrib/samples/github/adkreleasedocs/pom.xml
+++ b/contrib/samples/github/adkreleasedocs/pom.xml
@@ -20,7 +20,7 @@
     <parent>
         <groupId>com.google.adk</groupId>
         <artifactId>google-adk-samples</artifactId>
-        <version>1.5.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+        <version>1.6.0</version><!-- {x-version-update:google-adk:current} -->
         <relativePath>../..</relativePath>
     </parent>
 
diff --git a/contrib/samples/github/adkspam/pom.xml b/contrib/samples/github/adkspam/pom.xml
index 066840879..c5650be87 100644
--- a/contrib/samples/github/adkspam/pom.xml
+++ b/contrib/samples/github/adkspam/pom.xml
@@ -20,7 +20,7 @@
     <parent>
         <groupId>com.google.adk</groupId>
         <artifactId>google-adk-samples</artifactId>
-        <version>1.5.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+        <version>1.6.0</version><!-- {x-version-update:google-adk:current} -->
         <relativePath>../..</relativePath>
     </parent>
 
diff --git a/contrib/samples/github/adkstale/pom.xml b/contrib/samples/github/adkstale/pom.xml
index b09675be3..c0ec8e387 100644
--- a/contrib/samples/github/adkstale/pom.xml
+++ b/contrib/samples/github/adkstale/pom.xml
@@ -20,7 +20,7 @@
     <parent>
         <groupId>com.google.adk</groupId>
         <artifactId>google-adk-samples</artifactId>
-        <version>1.5.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+        <version>1.6.0</version><!-- {x-version-update:google-adk:current} -->
         <relativePath>../..</relativePath>
     </parent>
 
diff --git a/contrib/samples/github/adktriaging/pom.xml b/contrib/samples/github/adktriaging/pom.xml
index 640170f70..597f8b7fe 100644
--- a/contrib/samples/github/adktriaging/pom.xml
+++ b/contrib/samples/github/adktriaging/pom.xml
@@ -20,7 +20,7 @@
     <parent>
         <groupId>com.google.adk</groupId>
         <artifactId>google-adk-samples</artifactId>
-        <version>1.5.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+        <version>1.6.0</version><!-- {x-version-update:google-adk:current} -->
         <relativePath>../..</relativePath>
     </parent>
 
diff --git a/contrib/samples/github/githubtools/pom.xml b/contrib/samples/github/githubtools/pom.xml
index 240a8f6d3..79c1138ee 100644
--- a/contrib/samples/github/githubtools/pom.xml
+++ b/contrib/samples/github/githubtools/pom.xml
@@ -20,7 +20,7 @@
     <parent>
         <groupId>com.google.adk</groupId>
         <artifactId>google-adk-samples</artifactId>
-        <version>1.5.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+        <version>1.6.0</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 70a4c22a2..a4ce077a3 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>1.5.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+        <version>1.6.0</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 867b2f14a..3c708055f 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>1.5.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+        <version>1.6.0</version><!-- {x-version-update:google-adk:current} -->
         <relativePath>../../..</relativePath>
     </parent>
 
diff --git a/contrib/samples/pom.xml b/contrib/samples/pom.xml
index 04ab3ffd5..e631e678a 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>1.5.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+    <version>1.6.0</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 ff107ac72..7d358503c 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>1.5.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+        <version>1.6.0</version><!-- {x-version-update:google-adk:current} -->
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/core/pom.xml b/core/pom.xml
index 20d3978c4..c06d50ef3 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>1.5.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+    <version>1.6.0</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 21f774b72..dc9aa665b 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 = "1.5.0"; // x-release-please-released-version
+  public static final String JAVA_ADK_VERSION = "1.6.0"; // x-release-please-released-version
 
   private Version() {}
 }
diff --git a/dev/pom.xml b/dev/pom.xml
index 1221c90e6..4178ad75b 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>1.5.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+    <version>1.6.0</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 9806b96b6..d4d2692a1 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>1.5.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+    <version>1.6.0</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 54076dc6e..b6b5aa4fa 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>1.5.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+    <version>1.6.0</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 f9308b2dd..5a6359903 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>1.5.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+        <version>1.6.0</version><!-- {x-version-update:google-adk:current} -->
         <relativePath>../pom.xml</relativePath>
     </parent>
 
diff --git a/pom.xml b/pom.xml
index 9d1b06182..b52ec31d8 100644
--- a/pom.xml
+++ b/pom.xml
@@ -17,7 +17,7 @@
 
   <groupId>com.google.adk</groupId>
   <artifactId>google-adk-parent</artifactId>
-  <version>1.5.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+  <version>1.6.0</version><!-- {x-version-update:google-adk:current} -->
   <packaging>pom</packaging>
 
   <name>Google Agent Development Kit Maven Parent POM</name>
diff --git a/tutorials/city-time-weather/pom.xml b/tutorials/city-time-weather/pom.xml
index d6cad47e5..95587ec6e 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>1.5.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+    <version>1.6.0</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 761c6cb67..7489516ce 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>1.5.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+    <version>1.6.0</version><!-- {x-version-update:google-adk:current} -->
     <relativePath>../../pom.xml</relativePath>
   </parent>