diff --git a/.github/workflows/create-release-pr.yml b/.github/workflows/create-release-pr.yml
index 136f7d36642..d8cc5c1450f 100644
--- a/.github/workflows/create-release-pr.yml
+++ b/.github/workflows/create-release-pr.yml
@@ -42,16 +42,14 @@ jobs:
           fi
           echo "Release v${AGENT_VERSION} does not exist. Proceeding."
 
-      - name: Fetch dev branch
+      - name: Fetch latest remote refs
         run: |
-          git fetch origin dev:dev
+          git fetch origin
 
       - name: Create staging branch
         run: |
           BRANCH_NAME="v${AGENT_VERSION}-stage"
-          git checkout -b "$BRANCH_NAME" origin/dev
-          COMMIT_SHA=$(git rev-parse HEAD)
-          echo "Staging branch: $BRANCH_NAME at $COMMIT_SHA"
+          git checkout -b "$BRANCH_NAME"
           echo "BRANCH_NAME=$BRANCH_NAME" >> $GITHUB_ENV
 
       - name: Generate changelog
@@ -139,6 +137,13 @@ jobs:
           git config user.email "amazon-ecs-bot@amazon.com"
           git commit -m "Release ${AGENT_VERSION}"
 
+      - name: Generate App Token
+        id: app-token
+        uses: actions/create-github-app-token@v3
+        with:
+          app-id: ${{ secrets.APP_ID }}
+          private-key: ${{ secrets.APP_PRIVATE_KEY }}
+
       - name: Push staging branch to origin
         run: |
           echo "Pushing branch ${BRANCH_NAME} to origin..."
@@ -146,7 +151,7 @@ jobs:
 
       - name: Create pull request
         env:
-          GH_TOKEN: ${{ secrets.ECS_AGENT_WORKFLOW_SECRET }}
+          GH_TOKEN: ${{ steps.app-token.outputs.token }}
         run: |
           PR_BODY=$(cat <<EOF
           ### Summary
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 77762e21813..ca7d46b6051 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,14 @@
 # Changelog
 
+# 1.999.99
+* Enhancement - Emit duration metrics for TACS connect/disconnect [#4928](https://github.com/aws/amazon-ecs-agent/pull/4928)
+* Enhancement - Bump github.com/aws/aws-sdk-go-v2/aws/protocol/eventstream from 1.6.10 to 1.7.8 in /agent [#4922](https://github.com/aws/amazon-ecs-agent/pull/4922)
+* Enhancement - Bump github.com/aws/aws-sdk-go-v2/aws/protocol/eventstream from 1.6.5 to 1.7.8 in /ecs-init [#4925](https://github.com/aws/amazon-ecs-agent/pull/4925)
+* Enhancement - Track and emit metric for disconnect time from ACS [#4920](https://github.com/aws/amazon-ecs-agent/pull/4920)
+* Enhancement - engine: skip execution role checks when task desired status is stopped [#4918](https://github.com/aws/amazon-ecs-agent/pull/4918)
+* Enhancement - Add NeuronDevices type and sysfs-based device discovery [#4919](https://github.com/aws/amazon-ecs-agent/pull/4919)
+* Bugfix - fix(netlib): Conditionally add IPv6 subnet to IPAM config when IPv6 … [#4916](https://github.com/aws/amazon-ecs-agent/pull/4916)
+
 # 1.102.2
 * Enhancement - Update SSM exec agent version to 3.3.4108.0 [#4912](https://github.com/aws/amazon-ecs-agent/pull/4912)
 * Enhancement - Update Go version to 1.25.8 [#4894](https://github.com/aws/amazon-ecs-agent/pull/4894)
diff --git a/VERSION b/VERSION
index acf18fb6640..1b55fc3447a 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-1.102.2
+1.999.99
diff --git a/agent/version/version.go b/agent/version/version.go
index fd0d3acb3b9..57c956c77df 100644
--- a/agent/version/version.go
+++ b/agent/version/version.go
@@ -22,10 +22,10 @@ package version
 // repository. Only the 'Version' const should change in checked-in source code
 
 // Version is the version of the Agent
-const Version = "1.102.2"
+const Version = "1.999.99"
 
 // GitDirty indicates the cleanliness of the git repo when this agent was built
 const GitDirty = true
 
 // GitShortHash is the short hash of this agent build
-const GitShortHash = "aa836854"
+const GitShortHash = "42ffd2f3"
diff --git a/ecs-init/ECSVERSION b/ecs-init/ECSVERSION
index acf18fb6640..1b55fc3447a 100644
--- a/ecs-init/ECSVERSION
+++ b/ecs-init/ECSVERSION
@@ -1 +1 @@
-1.102.2
+1.999.99
diff --git a/ecs-init/config/common.go b/ecs-init/config/common.go
index 8e53680b0cb..b4327cb485d 100644
--- a/ecs-init/config/common.go
+++ b/ecs-init/config/common.go
@@ -46,7 +46,7 @@ const (
 	// DefaultAgentVersion is the version of the agent that will be
 	// fetched if required. This should look like v1.2.3 or an
 	// 8-character sha, as is downloadable from S3.
-	DefaultAgentVersion = "v1.102.2"
+	DefaultAgentVersion = "v1.999.99"
 
 	// AgentPartitionBucketName is the name of the paritional s3 bucket that stores the agent
 	AgentPartitionBucketName = "amazon-ecs-agent"
diff --git a/packaging/amazon-linux-ami-integrated/ecs-agent.spec b/packaging/amazon-linux-ami-integrated/ecs-agent.spec
index 6d0fc832571..e37e121d0e0 100644
--- a/packaging/amazon-linux-ami-integrated/ecs-agent.spec
+++ b/packaging/amazon-linux-ami-integrated/ecs-agent.spec
@@ -27,7 +27,7 @@
 %global ebs_csi_driver_dir /var/lib/ecs/deps/daemons/ebs-csi-driver
 
 Name:           ecs-init
-Version:        1.102.2
+Version:        1.999.99
 Release:        1%{?dist}
 License:        Apache 2.0
 Summary:        Amazon Elastic Container Service initialization application
@@ -61,6 +61,15 @@ Requires:       procps
 # statements by reading out the vendor directory:
 #
 # find ../../ecs-init/vendor -name \*.go -exec dirname {} \; | sort | uniq | sed 's,^.*ecs-init/vendor/,,; s/^/bundled(golang(/; s/$/))/;' | sed 's/^/Provides:\t/' | expand -
+Provides:       bundled(golang(github.com/Azure/go-ansiterm))
+Provides:       bundled(golang(github.com/Azure/go-ansiterm/winterm))
+Provides:       bundled(golang(github.com/Microsoft/go-winio))
+Provides:       bundled(golang(github.com/Microsoft/go-winio/internal/fs))
+Provides:       bundled(golang(github.com/Microsoft/go-winio/internal/socket))
+Provides:       bundled(golang(github.com/Microsoft/go-winio/internal/stringbuffer))
+Provides:       bundled(golang(github.com/Microsoft/go-winio/pkg/guid))
+Provides:       bundled(golang(github.com/NVIDIA/go-nvml/pkg/dl))
+Provides:       bundled(golang(github.com/NVIDIA/go-nvml/pkg/nvml))
 Provides:       bundled(golang(github.com/aws/amazon-ecs-agent/ecs-agent/awsrulesfn))
 Provides:       bundled(golang(github.com/aws/amazon-ecs-agent/ecs-agent/ipcompatibility))
 Provides:       bundled(golang(github.com/aws/amazon-ecs-agent/ecs-agent/logger))
@@ -68,23 +77,6 @@ Provides:       bundled(golang(github.com/aws/amazon-ecs-agent/ecs-agent/utils))
 Provides:       bundled(golang(github.com/aws/amazon-ecs-agent/ecs-agent/utils/net))
 Provides:       bundled(golang(github.com/aws/amazon-ecs-agent/ecs-agent/utils/netlinkwrapper))
 Provides:       bundled(golang(github.com/aws/amazon-ecs-agent/ecs-agent/utils/netlinkwrapper/mocks))
-Provides:       bundled(golang(github.com/aws/aws-sdk-go/aws))
-Provides:       bundled(golang(github.com/aws/aws-sdk-go/aws/awserr))
-Provides:       bundled(golang(github.com/aws/aws-sdk-go/aws/awsutil))
-Provides:       bundled(golang(github.com/aws/aws-sdk-go/aws/client/metadata))
-Provides:       bundled(golang(github.com/aws/aws-sdk-go/aws/credentials))
-Provides:       bundled(golang(github.com/aws/aws-sdk-go/aws/endpoints))
-Provides:       bundled(golang(github.com/aws/aws-sdk-go/aws/request))
-Provides:       bundled(golang(github.com/aws/aws-sdk-go/aws/signer/v4))
-Provides:       bundled(golang(github.com/aws/aws-sdk-go/internal/context))
-Provides:       bundled(golang(github.com/aws/aws-sdk-go/internal/ini))
-Provides:       bundled(golang(github.com/aws/aws-sdk-go/internal/sdkio))
-Provides:       bundled(golang(github.com/aws/aws-sdk-go/internal/sdkmath))
-Provides:       bundled(golang(github.com/aws/aws-sdk-go/internal/shareddefaults))
-Provides:       bundled(golang(github.com/aws/aws-sdk-go/internal/strings))
-Provides:       bundled(golang(github.com/aws/aws-sdk-go/internal/sync/singleflight))
-Provides:       bundled(golang(github.com/aws/aws-sdk-go/private/protocol))
-Provides:       bundled(golang(github.com/aws/aws-sdk-go/private/protocol/rest))
 Provides:       bundled(golang(github.com/aws/aws-sdk-go-v2/aws))
 Provides:       bundled(golang(github.com/aws/aws-sdk-go-v2/aws/arn))
 Provides:       bundled(golang(github.com/aws/aws-sdk-go-v2/aws/defaults))
@@ -143,13 +135,30 @@ Provides:       bundled(golang(github.com/aws/aws-sdk-go-v2/service/s3/internal/
 Provides:       bundled(golang(github.com/aws/aws-sdk-go-v2/service/s3/types))
 Provides:       bundled(golang(github.com/aws/aws-sdk-go-v2/service/sso))
 Provides:       bundled(golang(github.com/aws/aws-sdk-go-v2/service/sso/internal/endpoints))
+Provides:       bundled(golang(github.com/aws/aws-sdk-go-v2/service/sso/types))
 Provides:       bundled(golang(github.com/aws/aws-sdk-go-v2/service/ssooidc))
 Provides:       bundled(golang(github.com/aws/aws-sdk-go-v2/service/ssooidc/internal/endpoints))
 Provides:       bundled(golang(github.com/aws/aws-sdk-go-v2/service/ssooidc/types))
-Provides:       bundled(golang(github.com/aws/aws-sdk-go-v2/service/sso/types))
 Provides:       bundled(golang(github.com/aws/aws-sdk-go-v2/service/sts))
 Provides:       bundled(golang(github.com/aws/aws-sdk-go-v2/service/sts/internal/endpoints))
 Provides:       bundled(golang(github.com/aws/aws-sdk-go-v2/service/sts/types))
+Provides:       bundled(golang(github.com/aws/aws-sdk-go/aws))
+Provides:       bundled(golang(github.com/aws/aws-sdk-go/aws/awserr))
+Provides:       bundled(golang(github.com/aws/aws-sdk-go/aws/awsutil))
+Provides:       bundled(golang(github.com/aws/aws-sdk-go/aws/client/metadata))
+Provides:       bundled(golang(github.com/aws/aws-sdk-go/aws/credentials))
+Provides:       bundled(golang(github.com/aws/aws-sdk-go/aws/endpoints))
+Provides:       bundled(golang(github.com/aws/aws-sdk-go/aws/request))
+Provides:       bundled(golang(github.com/aws/aws-sdk-go/aws/signer/v4))
+Provides:       bundled(golang(github.com/aws/aws-sdk-go/internal/context))
+Provides:       bundled(golang(github.com/aws/aws-sdk-go/internal/ini))
+Provides:       bundled(golang(github.com/aws/aws-sdk-go/internal/sdkio))
+Provides:       bundled(golang(github.com/aws/aws-sdk-go/internal/sdkmath))
+Provides:       bundled(golang(github.com/aws/aws-sdk-go/internal/shareddefaults))
+Provides:       bundled(golang(github.com/aws/aws-sdk-go/internal/strings))
+Provides:       bundled(golang(github.com/aws/aws-sdk-go/internal/sync/singleflight))
+Provides:       bundled(golang(github.com/aws/aws-sdk-go/private/protocol))
+Provides:       bundled(golang(github.com/aws/aws-sdk-go/private/protocol/rest))
 Provides:       bundled(golang(github.com/aws/smithy-go))
 Provides:       bundled(golang(github.com/aws/smithy-go/auth))
 Provides:       bundled(golang(github.com/aws/smithy-go/auth/bearer))
@@ -177,8 +186,6 @@ Provides:       bundled(golang(github.com/aws/smithy-go/tracing))
 Provides:       bundled(golang(github.com/aws/smithy-go/transport/http))
 Provides:       bundled(golang(github.com/aws/smithy-go/transport/http/internal/io))
 Provides:       bundled(golang(github.com/aws/smithy-go/waiter))
-Provides:       bundled(golang(github.com/Azure/go-ansiterm))
-Provides:       bundled(golang(github.com/Azure/go-ansiterm/winterm))
 Provides:       bundled(golang(github.com/cihub/seelog))
 Provides:       bundled(golang(github.com/cihub/seelog/archive))
 Provides:       bundled(golang(github.com/cihub/seelog/archive/gzip))
@@ -228,11 +235,6 @@ Provides:       bundled(golang(github.com/klauspost/compress/internal/cpuinfo))
 Provides:       bundled(golang(github.com/klauspost/compress/internal/snapref))
 Provides:       bundled(golang(github.com/klauspost/compress/zstd))
 Provides:       bundled(golang(github.com/klauspost/compress/zstd/internal/xxhash))
-Provides:       bundled(golang(github.com/Microsoft/go-winio))
-Provides:       bundled(golang(github.com/Microsoft/go-winio/internal/fs))
-Provides:       bundled(golang(github.com/Microsoft/go-winio/internal/socket))
-Provides:       bundled(golang(github.com/Microsoft/go-winio/internal/stringbuffer))
-Provides:       bundled(golang(github.com/Microsoft/go-winio/pkg/guid))
 Provides:       bundled(golang(github.com/moby/patternmatcher))
 Provides:       bundled(golang(github.com/moby/sys/sequential))
 Provides:       bundled(golang(github.com/moby/sys/user))
@@ -240,8 +242,6 @@ Provides:       bundled(golang(github.com/moby/sys/userns))
 Provides:       bundled(golang(github.com/moby/term))
 Provides:       bundled(golang(github.com/moby/term/windows))
 Provides:       bundled(golang(github.com/morikuni/aec))
-Provides:       bundled(golang(github.com/NVIDIA/go-nvml/pkg/dl))
-Provides:       bundled(golang(github.com/NVIDIA/go-nvml/pkg/nvml))
 Provides:       bundled(golang(github.com/opencontainers/go-digest))
 Provides:       bundled(golang(github.com/opencontainers/image-spec/specs-go))
 Provides:       bundled(golang(github.com/opencontainers/image-spec/specs-go/v1))
@@ -393,6 +393,9 @@ fi
 %endif
 
 %changelog
+* Tue Apr 14 2026 amazon-ecs-bot <amazon-ecs-bot@amazon.com> - 1.999.99-1
+- Cache Agent version 1.999.99
+
 * Mon Mar 30 2026 Amogh Rathore <amoghr@amazon.com> - 1.102.2-1
 - Cache Agent version 1.102.2
 
diff --git a/packaging/generic-deb-integrated/debian/changelog b/packaging/generic-deb-integrated/debian/changelog
index 83691971c4b..4e5381f5ead 100644
--- a/packaging/generic-deb-integrated/debian/changelog
+++ b/packaging/generic-deb-integrated/debian/changelog
@@ -1,3 +1,9 @@
+amazon-ecs-init (1.999.99-1) stable; urgency=medium
+
+  * Cache Agent version 1.999.99
+
+ -- amazon-ecs-bot <amazon-ecs-bot@amazon.com>  Tue, 14 Apr 2026 18:00:00 +0000
+
 amazon-ecs-init (1.102.2-1) stable; urgency=medium
 
   * Cache Agent version 1.102.2
diff --git a/packaging/generic-rpm-integrated/amazon-ecs-init.spec b/packaging/generic-rpm-integrated/amazon-ecs-init.spec
index cb02881f6f7..160f1a20eda 100644
--- a/packaging/generic-rpm-integrated/amazon-ecs-init.spec
+++ b/packaging/generic-rpm-integrated/amazon-ecs-init.spec
@@ -19,7 +19,7 @@
 %global agent_image ecs-agent-v%{version}.tar
 
 Name:           amazon-ecs-init
-Version:        1.102.2
+Version:        1.999.99
 Release:        1
 License:        Apache 2.0
 Summary:        Amazon Elastic Container Service initialization application
@@ -93,6 +93,9 @@ ln -sf %{basename:%{agent_image}} %{_cachedir}/ecs/ecs-agent.tar
 %systemd_postun_with_restart amazon-ecs-volume-plugin
 
 %changelog
+* Tue Apr 14 2026 amazon-ecs-bot <amazon-ecs-bot@amazon.com> - 1.999.99-1
+- Cache Agent version 1.999.99
+
 * Mon Mar 30 2026 Amogh Rathore <amoghr@amazon.com> - 1.102.2-1
 - Cache Agent version 1.102.2
 
diff --git a/packaging/suse/amazon-ecs-init.changes b/packaging/suse/amazon-ecs-init.changes
index d5e45bf7c50..98e6d446577 100644
--- a/packaging/suse/amazon-ecs-init.changes
+++ b/packaging/suse/amazon-ecs-init.changes
@@ -1,4 +1,8 @@
 -------------------------------------------------------------------
+Tue Apr 14, 18:00:00 UTC 2026 - amazon-ecs-bot@amazon.com - 1.999.99-1
+
+- Cache Agent version 1.999.99
+-------------------------------------------------------------------
 Mon Mar 30, 17:00:00 UTC 2026 - amoghr@amazon.com - 1.102.2-1
 
 - Cache Agent version 1.102.2
diff --git a/scripts/changelog/CHANGELOG_MASTER b/scripts/changelog/CHANGELOG_MASTER
index 93d4e1a47a7..725e5627777 100644
--- a/scripts/changelog/CHANGELOG_MASTER
+++ b/scripts/changelog/CHANGELOG_MASTER
@@ -1,3 +1,8 @@
+1.999.99-1
+amazon-ecs-bot <amazon-ecs-bot@amazon.com>
+2026-04-14T10:00:00-08:00
+Cache Agent version 1.999.99
+
 1.102.2-1
 Amogh Rathore <amoghr@amazon.com>
 2026-03-30T10:00:00-07:00
diff --git a/scripts/generate-release-changelog.sh b/scripts/generate-release-changelog.sh
index 2a20075d012..7ac4433c8a5 100755
--- a/scripts/generate-release-changelog.sh
+++ b/scripts/generate-release-changelog.sh
@@ -20,8 +20,8 @@ set -e
 OUTPUT_FILE="CHANGELOG.md"
 REPO_OWNER="aws"
 REPO_NAME="amazon-ecs-agent"
-BASE_BRANCH="master"
-DEV_BRANCH="dev"
+BASE_BRANCH="origin/master"
+DEV_BRANCH="origin/dev"
 AGENT_VERSION=""
 
 # Global arrays to store changelog entries by category
@@ -136,7 +136,7 @@ get_release_changes() {
 	local commits
 
 	# Exclude merge commits using --no-merges
-	commits=$(git log ${BASE_BRANCH}..${DEV_BRANCH} --no-merges --format=%H 2>/dev/null)
+	commits=$(git log ${BASE_BRANCH}..${DEV_BRANCH} --no-merges --format=%H)
 
 	if [ $? -ne 0 ]; then
 		log_error "Failed to get commits. Make sure you're in a git repository and both ${BASE_BRANCH} and ${DEV_BRANCH} branches exist"