diff --git a/.github/workflows/release-runtime-interface-client.yml b/.github/workflows/release-runtime-interface-client.yml
new file mode 100644
index 00000000..43090d1b
--- /dev/null
+++ b/.github/workflows/release-runtime-interface-client.yml
@@ -0,0 +1,288 @@
+name: Release RIC to Maven Central
+
+# RIC ships a native JNI lib for 4 targets + a main JAR (5 artifacts). Each
+# native lib is built on its own architecture (x86_64 on ubuntu-latest,
+# aarch_64 on ubuntu-24.04-arm) instead of emulating with QEMU. A build matrix
+# produces the classifier JARs, then one job assembles and publishes them.
+
+on:
+  workflow_dispatch:
+    inputs:
+      releaseVersion:
+        description: 'Release version override (optional; defaults to the POM version without -SNAPSHOT)'
+        required: false
+        type: string
+      developmentVersion:
+        description: 'Next development version override (optional, must end with -SNAPSHOT)'
+        required: false
+        type: string
+      skip_publish:
+        description: 'Skip publish (dry-run validation)'
+        required: false
+        type: boolean
+        default: false
+
+permissions:
+  contents: write   # push release commit and tag
+  id-token: write   # assume the OIDC role for secret retrieval
+
+# Share the repo-wide "release" group with release.yml so RIC and the pure-Java
+# modules can never publish concurrently. Never cancel in-flight: it could leave
+# a half-published state.
+concurrency:
+  group: release
+  cancel-in-progress: false
+
+env:
+  MODULE: aws-lambda-java-runtime-interface-client
+  RELEASE_VERSION_INPUT: ${{ github.event.inputs.releaseVersion }}
+  DEVELOPMENT_VERSION_INPUT: ${{ github.event.inputs.developmentVersion }}
+  MAVEN_ARGS: "-B --no-transfer-progress"
+  AWS_REGION: ${{ vars.AWS_REGION_MAVEN_RELEASE }}
+  OIDC_ROLE_ARN: ${{ secrets.AWS_ROLE_MAVEN_RELEASE }}
+
+jobs:
+  # Build each architecture's native libs (glibc + musl) on a native runner.
+  build-natives:
+    strategy:
+      fail-fast: true
+      matrix:
+        include:
+          - arch: x86_64
+            runner: ubuntu-latest
+            profiles: linux-x86_64 linux_musl-x86_64
+          - arch: aarch64
+            runner: ubuntu-24.04-arm
+            profiles: linux-aarch64 linux_musl-aarch64
+    runs-on: ${{ matrix.runner }}
+    timeout-minutes: 45
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
+
+      - name: Set up JDK 8
+        uses: actions/setup-java@be666c2fcd27ec809703dec50e508c2fdc7f6654 # v5
+        with:
+          java-version: 8
+          distribution: corretto
+          cache: maven
+
+      - name: Resolve release version
+        run: |
+          CURRENT_VERSION=$(mvn -q -DforceStdout help:evaluate -Dexpression=project.version --file "$MODULE/pom.xml")
+          CURRENT_VERSION="${CURRENT_VERSION//[$'\r\n']/}"
+          if [[ "$CURRENT_VERSION" != *-SNAPSHOT ]]; then
+            echo "::error::POM version '$CURRENT_VERSION' is not a SNAPSHOT"
+            exit 1
+          fi
+          echo "EFFECTIVE_RELEASE_VERSION=${RELEASE_VERSION_INPUT:-${CURRENT_VERSION%-SNAPSHOT}}" >> "$GITHUB_ENV"
+
+      # -DskipTests: only installed so the module compiles, not released here.
+      - name: Install intra-repo dependencies
+        run: |
+          for dep in aws-lambda-java-core aws-lambda-java-serialization; do
+            mvn install -DskipTests --file "$dep/pom.xml"
+          done
+
+      # Build at the release version (matches the JAR names the release job
+      # attaches).
+      - name: Build native classifier JARs (${{ matrix.arch }})
+        env:
+          IS_JAVA_8: true
+        run: |
+          mvn versions:set -DnewVersion="$EFFECTIVE_RELEASE_VERSION" -DgenerateBackupPoms=false --file "$MODULE/pom.xml"
+          for profile in ${{ matrix.profiles }}; do
+            echo "::group::Building $profile"
+            mvn package -P "$profile" -DmultiArch=false -DskipTests --file "$MODULE/pom.xml"
+            echo "::endgroup::"
+          done
+
+      # JARs to attach + .so files to assemble the fat main JAR.
+      - name: Upload native artifacts
+        uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4
+        with:
+          name: ric-natives-${{ matrix.arch }}
+          if-no-files-found: error
+          path: |
+            ${{ env.MODULE }}/target/*-linux*.jar
+            ${{ env.MODULE }}/target/classes/jni/*.so
+
+  # Assemble all native builds and publish.
+  release:
+    needs: build-natives
+    runs-on: ubuntu-latest
+    environment: Release
+    timeout-minutes: 30
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
+        with:
+          fetch-depth: 0   # full history for tagging/pushing
+
+      - name: Set up JDK 8
+        uses: actions/setup-java@be666c2fcd27ec809703dec50e508c2fdc7f6654 # v5
+        with:
+          java-version: 8
+          distribution: corretto
+          cache: maven
+
+      - name: Validate inputs and resolve versions
+        run: |
+          CURRENT_VERSION=$(mvn -q -DforceStdout help:evaluate -Dexpression=project.version --file "$MODULE/pom.xml")
+          CURRENT_VERSION="${CURRENT_VERSION//[$'\r\n']/}"
+          if [[ "$CURRENT_VERSION" != *-SNAPSHOT ]]; then
+            echo "::error::POM version '$CURRENT_VERSION' is not a SNAPSHOT"
+            exit 1
+          fi
+
+          EFFECTIVE_RELEASE_VERSION="${RELEASE_VERSION_INPUT:-${CURRENT_VERSION%-SNAPSHOT}}"
+
+          # Next development version: use the override, or bump the patch.
+          if [[ -n "$DEVELOPMENT_VERSION_INPUT" ]]; then
+            if [[ "$DEVELOPMENT_VERSION_INPUT" != *-SNAPSHOT ]]; then
+              echo "::error::developmentVersion '$DEVELOPMENT_VERSION_INPUT' must end with -SNAPSHOT"
+              exit 1
+            fi
+            NEXT_DEV_VERSION="$DEVELOPMENT_VERSION_INPUT"
+          else
+            IFS='.' read -r MA MI PA <<< "$EFFECTIVE_RELEASE_VERSION"
+            NEXT_DEV_VERSION="${MA}.${MI}.$((PA + 1))-SNAPSHOT"
+          fi
+
+          echo "EFFECTIVE_RELEASE_VERSION=$EFFECTIVE_RELEASE_VERSION" >> "$GITHUB_ENV"
+          echo "NEXT_DEV_VERSION=$NEXT_DEV_VERSION" >> "$GITHUB_ENV"
+          echo "TAG_NAME=${MODULE}-${EFFECTIVE_RELEASE_VERSION}" >> "$GITHUB_ENV"
+          echo "::notice::Releasing $MODULE $EFFECTIVE_RELEASE_VERSION (next dev $NEXT_DEV_VERSION)"
+
+      - name: Configure git user
+        run: |
+          git config user.name "github-actions[bot]"
+          git config user.email "github-actions[bot]@users.noreply.github.com"
+
+      # -DskipTests: only installed so the module compiles, not released here.
+      - name: Install intra-repo dependencies
+        run: |
+          for dep in aws-lambda-java-core aws-lambda-java-serialization; do
+            mvn install -DskipTests --file "$dep/pom.xml"
+          done
+
+      - name: Set release version
+        run: mvn versions:set -DnewVersion="$EFFECTIVE_RELEASE_VERSION" -DgenerateBackupPoms=false --file "$MODULE/pom.xml"
+
+      # Test gate before publish.
+      - name: Run tests
+        env:
+          IS_JAVA_8: true
+        run: mvn test --file "$MODULE/pom.xml"
+
+      # JARs to attach + .so files for the fat main JAR.
+      - name: Download native artifacts
+        uses: actions/download-artifact@fa0a91b85d4f404e444e00e005971372dc801d16 # v4.1.8
+        with:
+          pattern: ric-natives-*
+          path: ric-natives
+
+      - name: Stage native artifacts
+        run: |
+          mkdir -p "$MODULE/target/classes/jni"
+          find ric-natives -name '*.jar' -exec cp {} "$MODULE/target/" \;
+          find ric-natives -name '*.so' -exec cp {} "$MODULE/target/classes/jni/" \;
+          echo "Staged native artifacts:"
+          ls -1 "$MODULE/target/"*-linux*.jar "$MODULE/target/classes/jni/"*.so
+
+      - name: Configure AWS credentials (OIDC)
+        if: ${{ github.event.inputs.skip_publish != 'true' }}
+        uses: aws-actions/configure-aws-credentials@7474bc4690e29a8392af63c5b98e7449536d5c3a # v4
+        with:
+          aws-region: ${{ env.AWS_REGION }}
+          role-to-assume: ${{ env.OIDC_ROLE_ARN }}
+          role-session-name: GitHubActionsRicMavenCentralRelease
+          role-duration-seconds: 3600
+
+      - name: Fetch signing key and Sonatype credentials
+        if: ${{ github.event.inputs.skip_publish != 'true' }}
+        run: |
+          # Shared secrets from LambdaMavenDeploy; nothing stored in GitHub.
+          GPG_JSON=$(aws secretsmanager get-secret-value --secret-id maven.gpg.keys --query SecretString --output text)
+          CREDS_JSON=$(aws secretsmanager get-secret-value --secret-id maven.sonatype.creds --query SecretString --output text)
+
+          GPG_PRIVATE_KEY=$(jq -r '.private' <<< "$GPG_JSON")
+          GPG_PASSPHRASE=$(jq -r '.passphrase' <<< "$GPG_JSON")
+          SONATYPE_USERNAME=$(jq -r '."maven-central-login"' <<< "$CREDS_JSON")
+          SONATYPE_PASSWORD=$(jq -r '."maven-central-password"' <<< "$CREDS_JSON")
+          echo "::add-mask::$GPG_PASSPHRASE"
+          echo "::add-mask::$SONATYPE_USERNAME"
+          echo "::add-mask::$SONATYPE_PASSWORD"
+
+          # Import the key with loopback pinentry so Maven can sign non-interactively.
+          GNUPGHOME=$(mktemp -d)
+          chmod 700 "$GNUPGHOME"
+          echo "allow-loopback-pinentry" > "$GNUPGHOME/gpg-agent.conf"
+          echo "pinentry-mode loopback" > "$GNUPGHOME/gpg.conf"
+          export GNUPGHOME
+          gpgconf --kill gpg-agent || true
+          gpg --batch --import <<< "$GPG_PRIVATE_KEY"
+          GPG_KEYNAME=$(gpg --list-secret-keys --with-colons | awk -F: '/^sec:/ {print $5; exit}')
+
+          # settings.xml with the Sonatype token (server id "central").
+          SETTINGS="$RUNNER_TEMP/settings.xml"
+          {
+            echo '<settings><servers><server>'
+            echo "<id>central</id>"
+            echo "<username>${SONATYPE_USERNAME}</username>"
+            echo "<password>${SONATYPE_PASSWORD}</password>"
+            echo '</server></servers></settings>'
+          } > "$SETTINGS"
+
+          echo "GNUPGHOME=$GNUPGHOME" >> "$GITHUB_ENV"
+          echo "GPG_KEYNAME=$GPG_KEYNAME" >> "$GITHUB_ENV"
+          echo "GPG_PASSPHRASE=$GPG_PASSPHRASE" >> "$GITHUB_ENV"
+          echo "MAVEN_SETTINGS=$SETTINGS" >> "$GITHUB_ENV"
+
+      # -DmultiArch=false builds only the host .so; the aarch_64 .so is already
+      # staged, so the main JAR still bundles all four. build-helper attaches
+      # the staged classifier JARs. Gate already ran, so -DskipTests.
+      - name: Publish to Maven Central
+        if: ${{ github.event.inputs.skip_publish != 'true' }}
+        env:
+          IS_JAVA_8: true
+        run: |
+          mvn deploy -Prelease -DskipTests -DmultiArch=false \
+            -s "$MAVEN_SETTINGS" \
+            -Dgpg.keyname="$GPG_KEYNAME" -Dgpg.passphrase="$GPG_PASSPHRASE" \
+            --file "$MODULE/pom.xml"
+
+      - name: Tag and push (only after publish succeeds)
+        if: ${{ github.event.inputs.skip_publish != 'true' }}
+        run: |
+          git commit -am "chore(ric): release ${EFFECTIVE_RELEASE_VERSION}"
+          git tag "$TAG_NAME"
+          mvn versions:set -DnewVersion="$NEXT_DEV_VERSION" -DgenerateBackupPoms=false --file "$MODULE/pom.xml"
+          git commit -am "chore(ric): prepare next development ${NEXT_DEV_VERSION}"
+          git push --atomic origin "HEAD:${GITHUB_REF_NAME}" "refs/tags/${TAG_NAME}"
+
+      # Dry-run: validate assembly, no publish/push.
+      - name: Dry-run assemble (no publish)
+        if: ${{ github.event.inputs.skip_publish == 'true' }}
+        env:
+          IS_JAVA_8: true
+        run: mvn package -DskipTests -DmultiArch=false --file "$MODULE/pom.xml"
+
+      # Nothing was pushed, so this only cleans the runner.
+      - name: Roll back local tag on failure
+        if: ${{ failure() && github.event.inputs.skip_publish != 'true' }}
+        run: |
+          git tag -d "$TAG_NAME" 2>/dev/null || true
+          echo "::warning::Release failed. The remote was not modified; safe to retry."
+
+      - name: Summary
+        if: ${{ github.event.inputs.skip_publish != 'true' }}
+        run: |
+          echo "## Release Summary" >> $GITHUB_STEP_SUMMARY
+          echo "" >> $GITHUB_STEP_SUMMARY
+          echo "| Field | Value |" >> $GITHUB_STEP_SUMMARY
+          echo "|-------|-------|" >> $GITHUB_STEP_SUMMARY
+          echo "| Module | \`$MODULE\` |" >> $GITHUB_STEP_SUMMARY
+          echo "| Version | \`$EFFECTIVE_RELEASE_VERSION\` |" >> $GITHUB_STEP_SUMMARY
+          echo "| Tag | \`$TAG_NAME\` |" >> $GITHUB_STEP_SUMMARY
+          echo "| Artifacts | main JAR + linux/linux_musl x x86_64/aarch_64 classifier JARs |" >> $GITHUB_STEP_SUMMARY
+          echo "| Built natively | x86_64 on ubuntu-latest, aarch_64 on ubuntu-24.04-arm (no QEMU) |" >> $GITHUB_STEP_SUMMARY
+          echo "| Maven Central | [com.amazonaws:$MODULE:$EFFECTIVE_RELEASE_VERSION](https://central.sonatype.com/artifact/com.amazonaws/$MODULE/$EFFECTIVE_RELEASE_VERSION) |" >> $GITHUB_STEP_SUMMARY
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
new file mode 100644
index 00000000..e148c013
--- /dev/null
+++ b/.github/workflows/release.yml
@@ -0,0 +1,235 @@
+name: Release to Maven Central
+
+# Builds, tests, and publishes a module to Maven Central in one environment.
+
+on:
+  workflow_dispatch:
+    inputs:
+      module:
+        description: 'Module to release (directory name, e.g. aws-lambda-java-log4j2)'
+        required: true
+        type: choice
+        # aws-lambda-java-runtime-interface-client is intentionally excluded: it
+        # ships a cross-compiled JNI native library and has its own dedicated
+        # pipeline, .github/workflows/release-runtime-interface-client.yml.
+        options:
+          - aws-lambda-java-core
+          - aws-lambda-java-events
+          - aws-lambda-java-events-sdk-transformer
+          - aws-lambda-java-log4j2
+          - aws-lambda-java-serialization
+          - aws-lambda-java-tests
+      releaseVersion:
+        description: 'Release version override (optional; defaults to the POM version without -SNAPSHOT)'
+        required: false
+        type: string
+      developmentVersion:
+        description: 'Next development version override (optional, must end with -SNAPSHOT)'
+        required: false
+        type: string
+      skip_publish:
+        description: 'Skip publish (dry-run validation)'
+        required: false
+        type: boolean
+        default: false
+
+permissions:
+  contents: write   
+  id-token: write   
+
+# Serialize all releases repo-wide to avoid concurrent pushes racing on the
+# default branch. Never cancel in-flight: it could leave a half-published state.
+concurrency:
+  group: release
+  cancel-in-progress: false
+
+env:
+  MODULE: ${{ github.event.inputs.module }}
+  RELEASE_VERSION_INPUT: ${{ github.event.inputs.releaseVersion }}
+  DEVELOPMENT_VERSION_INPUT: ${{ github.event.inputs.developmentVersion }}
+  # Batch mode + no transfer-progress spam for every Maven call (Maven 3.9+).
+  MAVEN_ARGS: "-B --no-transfer-progress"
+  AWS_REGION: ${{ vars.AWS_REGION_MAVEN_RELEASE }}
+  OIDC_ROLE_ARN: ${{ secrets.AWS_ROLE_MAVEN_RELEASE }}
+
+jobs:
+  release:
+    runs-on: ubuntu-latest
+    environment: Release
+    timeout-minutes: 30
+
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
+        with:
+          fetch-depth: 0   # full history for tagging/pushing
+
+      # Pinned JDK 8: building on a newer JDK can silently break the artifact.
+      - name: Set up JDK 8
+        uses: actions/setup-java@be666c2fcd27ec809703dec50e508c2fdc7f6654 # v5
+        with:
+          java-version: 8
+          distribution: corretto
+          cache: maven
+
+      - name: Validate inputs and resolve versions
+        run: |
+          if [[ ! -d "$MODULE" ]]; then
+            echo "::error::Module directory '$MODULE' does not exist"
+            exit 1
+          fi
+          if [[ ! -f "$MODULE/pom.xml" ]]; then
+            echo "::error::No pom.xml found in '$MODULE'"
+            exit 1
+          fi
+
+          # The POM version is the source of truth and must be a SNAPSHOT.
+          CURRENT_VERSION=$(mvn -q -DforceStdout help:evaluate -Dexpression=project.version --file "$MODULE/pom.xml")
+          CURRENT_VERSION="${CURRENT_VERSION//[$'\r\n']/}"
+          if [[ "$CURRENT_VERSION" != *-SNAPSHOT ]]; then
+            echo "::error::POM version '$CURRENT_VERSION' is not a SNAPSHOT"
+            exit 1
+          fi
+
+          # releaseVersion input is an optional override; default strips -SNAPSHOT.
+          EFFECTIVE_RELEASE_VERSION="${RELEASE_VERSION_INPUT:-${CURRENT_VERSION%-SNAPSHOT}}"
+
+          if [[ -n "$DEVELOPMENT_VERSION_INPUT" && "$DEVELOPMENT_VERSION_INPUT" != *-SNAPSHOT ]]; then
+            echo "::error::developmentVersion '$DEVELOPMENT_VERSION_INPUT' must end with -SNAPSHOT"
+            exit 1
+          fi
+
+          # Build the release plugin version args once; reused by both paths.
+          RELEASE_ARGS="-DreleaseVersion=$EFFECTIVE_RELEASE_VERSION"
+          if [[ -n "$DEVELOPMENT_VERSION_INPUT" ]]; then
+            RELEASE_ARGS="$RELEASE_ARGS -DdevelopmentVersion=$DEVELOPMENT_VERSION_INPUT"
+          fi
+
+          echo "EFFECTIVE_RELEASE_VERSION=$EFFECTIVE_RELEASE_VERSION" >> "$GITHUB_ENV"
+          echo "RELEASE_ARGS=$RELEASE_ARGS" >> "$GITHUB_ENV"
+          echo "::notice::Releasing $MODULE $EFFECTIVE_RELEASE_VERSION (POM currently $CURRENT_VERSION)"
+
+      - name: Configure git user
+        run: |
+          git config user.name "github-actions[bot]"
+          git config user.email "github-actions[bot]@users.noreply.github.com"
+
+      - name: Install intra-repo dependencies
+        run: |
+          # Installed so the target compiles. -DskipTests: not released here,
+          # only the target module gets the full verify gate below.
+          declare -A DEPS
+          DEPS[aws-lambda-java-core]=""
+          DEPS[aws-lambda-java-events]=""
+          DEPS[aws-lambda-java-serialization]=""
+          DEPS[aws-lambda-java-log4j2]="aws-lambda-java-core"
+          DEPS[aws-lambda-java-events-sdk-transformer]="aws-lambda-java-events"
+          DEPS[aws-lambda-java-tests]="aws-lambda-java-core aws-lambda-java-serialization aws-lambda-java-events"
+
+          DEP_LIST="${DEPS[$MODULE]}"
+          if [[ -n "$DEP_LIST" ]]; then
+            for dep in $DEP_LIST; do
+              echo "::group::Installing dependency: $dep"
+              mvn install -DskipTests --file "$dep/pom.xml"
+              echo "::endgroup::"
+            done
+          else
+            echo "::notice::No intra-repo dependencies for $MODULE"
+          fi
+
+      - name: Run tests
+        run: mvn verify --file "$MODULE/pom.xml"
+
+      - name: Configure AWS credentials (OIDC)
+        if: ${{ github.event.inputs.skip_publish != 'true' }}
+        uses: aws-actions/configure-aws-credentials@7474bc4690e29a8392af63c5b98e7449536d5c3a # v4
+        with:
+          aws-region: ${{ env.AWS_REGION }}
+          role-to-assume: ${{ env.OIDC_ROLE_ARN }}
+          role-session-name: GitHubActionsMavenCentralRelease
+          role-duration-seconds: 3600
+
+      - name: Fetch signing key and Sonatype credentials
+        if: ${{ github.event.inputs.skip_publish != 'true' }}
+        run: |
+          # Shared secrets from LambdaMavenDeploy; nothing stored in GitHub.
+          GPG_JSON=$(aws secretsmanager get-secret-value --secret-id maven.gpg.keys --query SecretString --output text)
+          CREDS_JSON=$(aws secretsmanager get-secret-value --secret-id maven.sonatype.creds --query SecretString --output text)
+
+          GPG_PRIVATE_KEY=$(jq -r '.private' <<< "$GPG_JSON")
+          GPG_PASSPHRASE=$(jq -r '.passphrase' <<< "$GPG_JSON")
+          SONATYPE_USERNAME=$(jq -r '."maven-central-login"' <<< "$CREDS_JSON")
+          SONATYPE_PASSWORD=$(jq -r '."maven-central-password"' <<< "$CREDS_JSON")
+          echo "::add-mask::$GPG_PASSPHRASE"
+          echo "::add-mask::$SONATYPE_USERNAME"
+          echo "::add-mask::$SONATYPE_PASSWORD"
+
+          # Import the key with loopback pinentry so Maven can sign non-interactively.
+          GNUPGHOME=$(mktemp -d)
+          chmod 700 "$GNUPGHOME"
+          echo "allow-loopback-pinentry" > "$GNUPGHOME/gpg-agent.conf"
+          echo "pinentry-mode loopback" > "$GNUPGHOME/gpg.conf"
+          export GNUPGHOME
+          gpgconf --kill gpg-agent || true
+          gpg --batch --import <<< "$GPG_PRIVATE_KEY"
+          GPG_KEYNAME=$(gpg --list-secret-keys --with-colons | awk -F: '/^sec:/ {print $5; exit}')
+
+          # settings.xml with the Sonatype token (server id "central").
+          SETTINGS="$RUNNER_TEMP/settings.xml"
+          {
+            echo '<settings><servers><server>'
+            echo "<id>central</id>"
+            echo "<username>${SONATYPE_USERNAME}</username>"
+            echo "<password>${SONATYPE_PASSWORD}</password>"
+            echo '</server></servers></settings>'
+          } > "$SETTINGS"
+
+          # Pass to later steps (values already masked).
+          echo "GNUPGHOME=$GNUPGHOME" >> "$GITHUB_ENV"
+          echo "GPG_KEYNAME=$GPG_KEYNAME" >> "$GITHUB_ENV"
+          echo "GPG_PASSPHRASE=$GPG_PASSPHRASE" >> "$GITHUB_ENV"
+          echo "MAVEN_SETTINGS=$SETTINGS" >> "$GITHUB_ENV"
+
+      # prepare/perform aren't atomic: prepare locally, publish, push only after.
+      - name: Release (prepare locally, publish, then push)
+        if: ${{ github.event.inputs.skip_publish != 'true' }}
+        run: |
+          # Prepare locally (no push): release commits + tag.
+          mvn release:prepare -DpushChanges=false $RELEASE_ARGS --file "$MODULE/pom.xml"
+
+          # perform forks a fresh build, so pass settings/gpg via -Darguments.
+          mvn release:perform -DlocalCheckout=true \
+            -Darguments="-s $MAVEN_SETTINGS -Prelease -Dgpg.keyname=$GPG_KEYNAME -Dgpg.passphrase=$GPG_PASSPHRASE" \
+            --file "$MODULE/pom.xml"
+
+          # Push commits + tag atomically, only after publish succeeded.
+          git push --atomic origin \
+            "HEAD:${GITHUB_REF_NAME}" \
+            "refs/tags/${MODULE}-${EFFECTIVE_RELEASE_VERSION}"
+
+      - name: Dry-run release (prepare only, no publish)
+        if: ${{ github.event.inputs.skip_publish == 'true' }}
+        run: |
+          mvn release:prepare -DdryRun=true $RELEASE_ARGS --file "$MODULE/pom.xml"
+          mvn release:clean --file "$MODULE/pom.xml" || true
+
+      # Nothing was pushed, so this only cleans the runner for a retry.
+      - name: Roll back release on failure
+        if: ${{ failure() && github.event.inputs.skip_publish != 'true' }}
+        run: |
+          mvn release:rollback --file "$MODULE/pom.xml" || true
+          mvn release:clean --file "$MODULE/pom.xml" || true
+          git tag -d "${MODULE}-${EFFECTIVE_RELEASE_VERSION}" 2>/dev/null || true
+          echo "::warning::Release failed before publish completed. The remote was not modified; the runner state has been rolled back. Safe to retry."
+
+      - name: Summary
+        if: ${{ github.event.inputs.skip_publish != 'true' }}
+        run: |
+          TAG_NAME="${MODULE}-${EFFECTIVE_RELEASE_VERSION}"
+          echo "## Release Summary" >> $GITHUB_STEP_SUMMARY
+          echo "" >> $GITHUB_STEP_SUMMARY
+          echo "| Field | Value |" >> $GITHUB_STEP_SUMMARY
+          echo "|-------|-------|" >> $GITHUB_STEP_SUMMARY
+          echo "| Module | \`$MODULE\` |" >> $GITHUB_STEP_SUMMARY
+          echo "| Version | \`$EFFECTIVE_RELEASE_VERSION\` |" >> $GITHUB_STEP_SUMMARY
+          echo "| Tag | \`$TAG_NAME\` |" >> $GITHUB_STEP_SUMMARY
+          echo "| Maven Central | [com.amazonaws:$MODULE:$EFFECTIVE_RELEASE_VERSION](https://central.sonatype.com/artifact/com.amazonaws/$MODULE/$EFFECTIVE_RELEASE_VERSION) |" >> $GITHUB_STEP_SUMMARY
diff --git a/aws-lambda-java-core/pom.xml b/aws-lambda-java-core/pom.xml
index 0a11aa51..e9464e3d 100644
--- a/aws-lambda-java-core/pom.xml
+++ b/aws-lambda-java-core/pom.xml
@@ -5,7 +5,7 @@
   
   <groupId>com.amazonaws</groupId>
   <artifactId>aws-lambda-java-core</artifactId>
-  <version>1.4.0</version>
+  <version>1.4.0-SNAPSHOT</version>
   <packaging>jar</packaging>
   
   <name>AWS Lambda Java Core Library</name>
@@ -22,6 +22,9 @@
   </licenses>
   <scm>
     <url>https://github.com/aws/aws-lambda-java-libs.git</url>
+    <connection>scm:git:https://github.com/aws/aws-lambda-java-libs.git</connection>
+    <developerConnection>scm:git:https://github.com/aws/aws-lambda-java-libs.git</developerConnection>
+    <tag>HEAD</tag>
   </scm>
   <developers>
     <developer>
@@ -38,6 +41,17 @@
 
   <build>
     <plugins>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-release-plugin</artifactId>
+        <version>3.1.1</version>
+        <configuration>
+          <tagNameFormat>aws-lambda-java-core-@{project.version}</tagNameFormat>
+          <autoVersionSubmodules>true</autoVersionSubmodules>
+          <releaseProfiles>release</releaseProfiles>
+          <goals>deploy</goals>
+        </configuration>
+      </plugin>
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-toolchains-plugin</artifactId>
@@ -140,6 +154,7 @@
             <extensions>true</extensions>
             <configuration>
               <publishingServerId>central</publishingServerId>
+              <autoPublish>true</autoPublish>
             </configuration>
           </plugin>
         </plugins>
diff --git a/aws-lambda-java-events-sdk-transformer/pom.xml b/aws-lambda-java-events-sdk-transformer/pom.xml
index 11054be1..1072f4cc 100644
--- a/aws-lambda-java-events-sdk-transformer/pom.xml
+++ b/aws-lambda-java-events-sdk-transformer/pom.xml
@@ -5,7 +5,7 @@
 
   <groupId>com.amazonaws</groupId>
   <artifactId>aws-lambda-java-events-sdk-transformer</artifactId>
-  <version>3.1.1</version>
+  <version>3.1.1-SNAPSHOT</version>
   <packaging>jar</packaging>
 
   <name>AWS Lambda Java Events SDK Transformer Library</name>
@@ -24,6 +24,9 @@
   </licenses>
   <scm>
     <url>https://github.com/aws/aws-lambda-java-libs.git</url>
+    <connection>scm:git:https://github.com/aws/aws-lambda-java-libs.git</connection>
+    <developerConnection>scm:git:https://github.com/aws/aws-lambda-java-libs.git</developerConnection>
+    <tag>HEAD</tag>
   </scm>
   <developers>
     <developer>
@@ -79,6 +82,17 @@
 
   <build>
     <plugins>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-release-plugin</artifactId>
+        <version>3.1.1</version>
+        <configuration>
+          <tagNameFormat>aws-lambda-java-events-sdk-transformer-@{project.version}</tagNameFormat>
+          <autoVersionSubmodules>true</autoVersionSubmodules>
+          <releaseProfiles>release</releaseProfiles>
+          <goals>deploy</goals>
+        </configuration>
+      </plugin>
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-toolchains-plugin</artifactId>
@@ -192,6 +206,7 @@
             <extensions>true</extensions>
             <configuration>
               <publishingServerId>central</publishingServerId>
+              <autoPublish>true</autoPublish>
             </configuration>
           </plugin>
         </plugins>
diff --git a/aws-lambda-java-events/pom.xml b/aws-lambda-java-events/pom.xml
index 1ac5d798..7ab9aa93 100644
--- a/aws-lambda-java-events/pom.xml
+++ b/aws-lambda-java-events/pom.xml
@@ -5,7 +5,7 @@
 
     <groupId>com.amazonaws</groupId>
     <artifactId>aws-lambda-java-events</artifactId>
-    <version>3.16.1</version>
+    <version>3.16.1-SNAPSHOT</version>
     <packaging>jar</packaging>
 
     <name>AWS Lambda Java Events Library</name>
@@ -22,6 +22,9 @@
     </licenses>
     <scm>
         <url>https://github.com/aws/aws-lambda-java-libs.git</url>
+        <connection>scm:git:https://github.com/aws/aws-lambda-java-libs.git</connection>
+        <developerConnection>scm:git:https://github.com/aws/aws-lambda-java-libs.git</developerConnection>
+        <tag>HEAD</tag>
     </scm>
     <developers>
         <developer>
@@ -65,6 +68,17 @@
                     </execution>
                 </executions>
             </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-release-plugin</artifactId>
+                <version>3.1.1</version>
+                <configuration>
+                    <tagNameFormat>aws-lambda-java-events-@{project.version}</tagNameFormat>
+                    <autoVersionSubmodules>true</autoVersionSubmodules>
+                    <releaseProfiles>release</releaseProfiles>
+                    <goals>deploy</goals>
+                </configuration>
+            </plugin>
         </plugins>
     </build>
 
@@ -187,6 +201,7 @@
                         <extensions>true</extensions>
                         <configuration>
                             <publishingServerId>central</publishingServerId>
+                            <autoPublish>true</autoPublish>
                         </configuration>
                     </plugin>
                     <plugin>
diff --git a/aws-lambda-java-log4j2/pom.xml b/aws-lambda-java-log4j2/pom.xml
index a03d3d3b..432c4f5c 100644
--- a/aws-lambda-java-log4j2/pom.xml
+++ b/aws-lambda-java-log4j2/pom.xml
@@ -5,7 +5,7 @@
 
     <groupId>com.amazonaws</groupId>
     <artifactId>aws-lambda-java-log4j2</artifactId>
-    <version>1.6.4</version>
+    <version>1.6.4-SNAPSHOT</version>
     <packaging>jar</packaging>
 
     <name>AWS Lambda Java Log4j 2.x Libraries</name>
@@ -22,6 +22,9 @@
     </licenses>
     <scm>
         <url>https://github.com/aws/aws-lambda-java-libs.git</url>
+        <connection>scm:git:https://github.com/aws/aws-lambda-java-libs.git</connection>
+        <developerConnection>scm:git:https://github.com/aws/aws-lambda-java-libs.git</developerConnection>
+        <tag>HEAD</tag>
     </scm>
     <developers>
         <developer>
@@ -77,6 +80,17 @@
 
     <build>
         <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-release-plugin</artifactId>
+                <version>3.1.1</version>
+                <configuration>
+                    <tagNameFormat>aws-lambda-java-log4j2-@{project.version}</tagNameFormat>
+                    <autoVersionSubmodules>true</autoVersionSubmodules>
+                    <releaseProfiles>release</releaseProfiles>
+                    <goals>deploy</goals>
+                </configuration>
+            </plugin>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-toolchains-plugin</artifactId>
@@ -183,6 +197,7 @@
                         <extensions>true</extensions>
                         <configuration>
                             <publishingServerId>central</publishingServerId>
+                            <autoPublish>true</autoPublish>
                         </configuration>
                     </plugin>
                 </plugins>
diff --git a/aws-lambda-java-runtime-interface-client/pom.xml b/aws-lambda-java-runtime-interface-client/pom.xml
index fa543df0..0cf33d82 100644
--- a/aws-lambda-java-runtime-interface-client/pom.xml
+++ b/aws-lambda-java-runtime-interface-client/pom.xml
@@ -4,7 +4,7 @@
     <modelVersion>4.0.0</modelVersion>
     <groupId>com.amazonaws</groupId>
     <artifactId>aws-lambda-java-runtime-interface-client</artifactId>
-    <version>2.11.0</version>
+    <version>2.11.0-SNAPSHOT</version>
     <packaging>jar</packaging>
 
     <name>AWS Lambda Java Runtime Interface Client</name>
@@ -21,6 +21,9 @@
     </licenses>
     <scm>
         <url>https://github.com/aws/aws-lambda-java-libs.git</url>
+        <connection>scm:git:https://github.com/aws/aws-lambda-java-libs.git</connection>
+        <developerConnection>scm:git:https://github.com/aws/aws-lambda-java-libs.git</developerConnection>
+        <tag>HEAD</tag>
     </scm>
     <developers>
         <developer>
@@ -115,6 +118,17 @@
             </extension>
         </extensions>
         <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-release-plugin</artifactId>
+                <version>3.1.1</version>
+                <configuration>
+                    <tagNameFormat>aws-lambda-java-runtime-interface-client-@{project.version}</tagNameFormat>
+                    <autoVersionSubmodules>true</autoVersionSubmodules>
+                    <releaseProfiles>release</releaseProfiles>
+                    <goals>deploy</goals>
+                </configuration>
+            </plugin>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-toolchains-plugin</artifactId>
@@ -402,6 +416,7 @@
                         <extensions>true</extensions>
                         <configuration>
                             <publishingServerId>central</publishingServerId>
+                            <autoPublish>true</autoPublish>
                         </configuration>
                     </plugin>
                     <plugin>
diff --git a/aws-lambda-java-serialization/pom.xml b/aws-lambda-java-serialization/pom.xml
index 503f3e76..613b204c 100644
--- a/aws-lambda-java-serialization/pom.xml
+++ b/aws-lambda-java-serialization/pom.xml
@@ -4,7 +4,7 @@
 
     <groupId>com.amazonaws</groupId>
     <artifactId>aws-lambda-java-serialization</artifactId>
-    <version>1.4.1</version>
+    <version>1.4.1-SNAPSHOT</version>
     <packaging>jar</packaging>
 
     <name>AWS Lambda Java Runtime Serialization</name>
@@ -19,6 +19,9 @@
     </licenses>
     <scm>
         <url>https://github.com/aws/aws-lambda-java-libs.git</url>
+        <connection>scm:git:https://github.com/aws/aws-lambda-java-libs.git</connection>
+        <developerConnection>scm:git:https://github.com/aws/aws-lambda-java-libs.git</developerConnection>
+        <tag>HEAD</tag>
     </scm>
     <developers>
         <developer>
@@ -175,6 +178,7 @@
                         <extensions>true</extensions>
                         <configuration>
                             <publishingServerId>central</publishingServerId>
+                            <autoPublish>true</autoPublish>
                         </configuration>
                     </plugin>
                 </plugins>
@@ -191,6 +195,17 @@
             </extension>
         </extensions>
         <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-release-plugin</artifactId>
+                <version>3.1.1</version>
+                <configuration>
+                    <tagNameFormat>aws-lambda-java-serialization-@{project.version}</tagNameFormat>
+                    <autoVersionSubmodules>true</autoVersionSubmodules>
+                    <releaseProfiles>release</releaseProfiles>
+                    <goals>deploy</goals>
+                </configuration>
+            </plugin>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-toolchains-plugin</artifactId>
diff --git a/aws-lambda-java-tests/pom.xml b/aws-lambda-java-tests/pom.xml
index 4a25586c..b1daf410 100644
--- a/aws-lambda-java-tests/pom.xml
+++ b/aws-lambda-java-tests/pom.xml
@@ -5,7 +5,7 @@
 
     <groupId>com.amazonaws</groupId>
     <artifactId>aws-lambda-java-tests</artifactId>
-    <version>1.1.3</version>
+    <version>1.1.3-SNAPSHOT</version>
     <packaging>jar</packaging>
 
     <name>AWS Lambda Java Tests</name>
@@ -20,6 +20,9 @@
     </licenses>
     <scm>
         <url>https://github.com/aws/aws-lambda-java-libs.git</url>
+        <connection>scm:git:https://github.com/aws/aws-lambda-java-libs.git</connection>
+        <developerConnection>scm:git:https://github.com/aws/aws-lambda-java-libs.git</developerConnection>
+        <tag>HEAD</tag>
     </scm>
     <developers>
         <developer>
@@ -236,6 +239,7 @@
                         <extensions>true</extensions>
                         <configuration>
                             <publishingServerId>central</publishingServerId>
+                            <autoPublish>true</autoPublish>
                         </configuration>
                     </plugin>
                 </plugins>
@@ -245,6 +249,17 @@
 
     <build>
         <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-release-plugin</artifactId>
+                <version>3.1.1</version>
+                <configuration>
+                    <tagNameFormat>aws-lambda-java-tests-@{project.version}</tagNameFormat>
+                    <autoVersionSubmodules>true</autoVersionSubmodules>
+                    <releaseProfiles>release</releaseProfiles>
+                    <goals>deploy</goals>
+                </configuration>
+            </plugin>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-toolchains-plugin</artifactId>