diff --git a/Dockerfile b/Dockerfile
index c209bb2..3508521 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -163,4 +163,15 @@ RUN chmod 0644 /etc/profile.d/*.sh && chmod +x /usr/local/bin/start-vllm && chmo
 RUN chmod 0644 /etc/profile.d/*.sh
 RUN printf 'ulimit -S -c 0\n' > /etc/profile.d/90-nocoredump.sh && chmod 0644 /etc/profile.d/90-nocoredump.sh
 
+# 9. Install Custom RCCL (gfx1151) - Replaces standard library with manually built one
+COPY custom_libs/librccl.so.1.gz /tmp/librccl.so.1.gz
+RUN echo "Installing Custom RCCL..." && \
+  gzip -d /tmp/librccl.so.1.gz && \
+  chmod 755 /tmp/librccl.so.1 && \
+  # Replace /opt/rocm library strictly as managed_rccl_install.sh does
+  cp -fv /tmp/librccl.so.1 /opt/rocm/lib/librccl.so.1.0 && \
+  # Replace /opt/venv library
+  find /opt/venv -name "librccl.so.1" -exec cp -fv /tmp/librccl.so.1 {} + && \
+  rm /tmp/librccl.so.1
+
 CMD ["/bin/bash"]
diff --git a/scripts/build_rccl_gfx1151.sh b/scripts/build_rccl_gfx1151.sh
new file mode 100755
index 0000000..eba9195
--- /dev/null
+++ b/scripts/build_rccl_gfx1151.sh
@@ -0,0 +1,50 @@
+#!/bin/bash
+set -e
+# Configuration
+REPO_URL="https://github.com/kyuz0/rocm-systems.git"
+BRANCH="gfx1151-rccl"
+BUILD_DIR="build_gfx1151"
+ROCM_PATH=${ROCM_PATH:-/opt/rocm}
+# Project sub-directory
+PROJECT_DIR="projects/rccl"
+echo "=== Building RCCL for gfx1151 ==="
+echo "Repo: $REPO_URL"
+echo "Branch: $BRANCH"
+echo "ROCm Path: $ROCM_PATH"
+# 1. Clone/Fetch
+if [ -d "rocm-systems" ]; then
+    echo "Directory 'rocm-systems' exists. Updating..."
+    cd rocm-systems
+    git fetch origin
+    git checkout $BRANCH
+    git pull origin $BRANCH
+else
+    echo "Cloning repository..."
+    git clone -b $BRANCH $REPO_URL
+    cd rocm-systems
+fi
+# 2. Setup Build Directory
+echo "Entering project directory..."
+cd $PROJECT_DIR
+mkdir -p $BUILD_DIR
+cd $BUILD_DIR
+echo "Configuring CMake for gfx1151..."
+# We explicitly set GPU_TARGETS to gfx1151 to override the default list.
+# We also set AMDGPU_TARGETS for standard rocm-cmake compliance.
+CXX=$ROCM_PATH/bin/hipcc cmake .. \
+    -DCMAKE_CXX_COMPILER=$ROCM_PATH/bin/hipcc \
+    -DDEFAULT_GPUS="gfx1151" \
+    -DGPU_TARGETS="gfx1151" \
+    -DAMDGPU_TARGETS="gfx1151" \
+    -DCMAKE_INSTALL_PREFIX=./install \
+    -DBUILD_TESTS=OFF \
+    -DGENERATE_SYM_KERNELS=OFF \
+    -DENABLE_AMDSMI=OFF \
+    -DCMAKE_BUILD_TYPE=Release
+# 3. Build
+echo "Building librccl.so..."
+make -j$(nproc)
+echo "=== Build Complete ==="
+echo "Libraries are located in:"
+echo "  $(pwd)/librccl.so"
+echo "  $(pwd)/librccl.so.1"
diff --git a/scripts/manage_rccl_install.sh b/scripts/manage_rccl_install.sh
new file mode 100755
index 0000000..99c0509
--- /dev/null
+++ b/scripts/manage_rccl_install.sh
@@ -0,0 +1,93 @@
+#!/bin/bash
+set -e
+# Configuration
+# Paths identified from your environment
+ROCM_LIB_PATH="/opt/rocm/lib/librccl.so.1.0"
+VENV_LIB_PATH="/opt/venv/lib/python3.13/site-packages/_rocm_sdk_libraries_gfx1151/lib/librccl.so.1"
+BACKUP_DIR="./rccl_backups_$(date +%Y%m%d_%H%M%S)"
+# Files to replace
+# We assume the new library is named 'librccl.so' or 'librccl.so.1' in the current directory or provided as arg
+NEW_LIB="${1:-librccl.so.1}"
+usage() {
+    echo "Usage: $0 [install <path_to_new_lib> | restore]"
+    echo "  install: Backs up existing libs and installs the new one."
+    echo "  restore: Restores libraries from the most recent backup directory."
+    exit 1
+}
+do_install() {
+    if [ ! -f "$NEW_LIB" ]; then
+        echo "Error: New library file '$NEW_LIB' not found."
+        echo "Please provide the path to the newly built librccl.so.1"
+        exit 1
+    fi
+    echo "=== Installing Custom RCCL (gfx1151) ==="
+    echo "Creating backup directory: $BACKUP_DIR"
+    mkdir -p "$BACKUP_DIR"
+    # 1. Backup /opt/rocm location
+    if [ -f "$ROCM_LIB_PATH" ]; then
+        echo "Backing up $ROCM_LIB_PATH..."
+        cp -v "$ROCM_LIB_PATH" "$BACKUP_DIR/librccl.so.1.0.rocm.bak"
+    else
+        echo "Warning: $ROCM_LIB_PATH not found, skipping backup."
+    fi
+    # 2. Backup /opt/venv location
+    if [ -f "$VENV_LIB_PATH" ]; then
+        echo "Backing up $VENV_LIB_PATH..."
+        cp -v "$VENV_LIB_PATH" "$BACKUP_DIR/librccl.so.1.venv.bak"
+    else
+        echo "Warning: $VENV_LIB_PATH not found, skipping backup."
+    fi
+    # Save backup dir name for restore
+    echo "$BACKUP_DIR" > .last_rccl_backup
+    # 3. Install to /opt/rocm
+    echo "Installing to $ROCM_LIB_PATH..."
+    # We use sudo assuming root ownership as shown in your ls output
+    sudo cp -v "$NEW_LIB" "$ROCM_LIB_PATH"
+    # 4. Install to /opt/venv
+    if [ -d "$(dirname "$VENV_LIB_PATH")" ]; then
+        echo "Installing to $VENV_LIB_PATH..."
+        sudo cp -v "$NEW_LIB" "$VENV_LIB_PATH"
+    else
+        echo "Skipping venv install (directory not found)."
+    fi
+    echo "=== Installation Complete ==="
+}
+do_restore() {
+    if [ ! -f .last_rccl_backup ]; then
+        echo "Error: No previous backup record found (.last_rccl_backup)."
+        echo "Please manually restore from your backup directories."
+        exit 1
+    fi
+    
+    LAST_BACKUP=$(cat .last_rccl_backup)
+    echo "=== Restoring RCCL from $LAST_BACKUP ==="
+    if [ ! -d "$LAST_BACKUP" ]; then
+        echo "Error: Backup directory $LAST_BACKUP does not exist."
+        exit 1
+    fi
+    # Restore ROCm lib
+    if [ -f "$LAST_BACKUP/librccl.so.1.0.rocm.bak" ]; then
+        echo "Restoring $ROCM_LIB_PATH..."
+        sudo cp -v "$LAST_BACKUP/librccl.so.1.0.rocm.bak" "$ROCM_LIB_PATH"
+    fi
+    # Restore Venv lib
+    if [ -f "$LAST_BACKUP/librccl.so.1.venv.bak" ]; then
+        echo "Restoring $VENV_LIB_PATH..."
+        sudo cp -v "$LAST_BACKUP/librccl.so.1.venv.bak" "$VENV_LIB_PATH"
+    fi
+    echo "=== Restore Complete ==="
+}
+COMMAND="$1"
+shift
+case "$COMMAND" in
+    install)
+        NEW_LIB="${1:-librccl.so.1}"
+        do_install
+        ;;
+    restore)
+        do_restore
+        ;;
+    *)
+        usage
+        ;;
+esac