diff --git a/backup_script.sh b/backup_script.sh
new file mode 100644
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--- /dev/null
+++ b/backup_script.sh
@@ -0,0 +1,501 @@
+#!/bin/bash
+
+# ─── Config ───────────────────────────────────────────────────────────────────
+CONFIG_DIR="$HOME/.config/backup_project"
+INSTALL_PATH="/usr/local/bin/backup_project"
+
+# ─── Help ─────────────────────────────────────────────────────────────────────
+if [[ "$1" == "--help" || "$1" == "-h" ]]; then
+  cat <<EOF
+
+backup_project — Incremental folder backup with versioned naming
+
+USAGE:
+  backup_project [folder]                    Back up a folder (or current dir)
+  backup_project --set-version X.Y.Z [folder]  Set the next version number (respects existing folders)
+  backup_project --force X.Y.Z [folder]        Force exact version number (ignores existing folders, one-time)
+  backup_project --install                   Install script system-wide to /usr/local/bin
+  backup_project --help                      Show this help message
+
+EXAMPLES:
+  backup_project                             # backs up current directory
+  backup_project ~/Documents/this-project   # backs up specified folder
+  backup_project --set-version 2.0.15       # next backup will be 2.0.15 (or higher if folders exist)
+  backup_project --force 2.0.15             # next backup will be exactly 2.0.15
+  backup_project --force 2.0.15 ~/Documents/this-project
+
+NOTES:
+  - On first run for any folder, you will be prompted for a starting version (e.g. 2.0.12)
+  - Each folder has its own config stored in ~/.config/backup_project/
+  - Backups are created in the same parent directory as the source folder
+  - To reset a folder's config:  rm ~/.config/backup_project/<config>.cfg
+  - To view all configs:         ls ~/.config/backup_project/
+  - To uninstall:                sudo rm /usr/local/bin/backup_project
+
+EOF
+  exit 0
+fi
+
+# ─── Self-install ─────────────────────────────────────────────────────────────
+if [[ "$1" == "--install" ]]; then
+  echo "Installing backup_project to $INSTALL_PATH ..."
+  sudo cp "$0" "$INSTALL_PATH"
+  sudo chmod +x "$INSTALL_PATH"
+  echo "Done! You can now run 'backup_project [folder]' from anywhere."
+  exit 0
+fi
+
+# ─── Set version override ─────────────────────────────────────────────────────
+# Usage: backup_project --set-version 2.0.15 [folder]
+if [[ "$1" == "--set-version" ]]; then
+  NEW_VERSION="$2"
+  SOURCE="$(realpath "${3:-$(pwd)}")"
+
+  if ! echo "$NEW_VERSION" | grep -qP '^\d+(\.\d+)*\.\d+
+# If no argument given, use current directory
+if [ -z "$1" ]; then
+  SOURCE="$(pwd)"
+else
+  SOURCE="$1"
+fi
+
+# Strip trailing slash, resolve to absolute path
+SOURCE="$(realpath "${SOURCE%/}")"
+
+if [ ! -d "$SOURCE" ]; then
+  echo "Error: '$SOURCE' is not a directory."
+  exit 1
+fi
+
+# ─── Load or create config for this source folder ────────────────────────────
+mkdir -p "$CONFIG_DIR"
+
+CONFIG_KEY=$(echo "$SOURCE" | tr '/' '_' | tr ' ' '_')
+FOLDER_CONFIG="$CONFIG_DIR/${CONFIG_KEY}.cfg"
+
+if [ ! -f "$FOLDER_CONFIG" ]; then
+  echo "First time backing up '$(basename "$SOURCE")'."
+  read -rp "Enter starting version (e.g. 2.0.12): " FULL_VERSION
+
+  # Validate format: must be X.Y.Z (digits and dots, at least one dot, ends in digits)
+  if ! echo "$FULL_VERSION" | grep -qP '^\d+(\.\d+)*\.\d+$'; then
+    echo "Error: version must be in format like 2.0.12 or 1.0.0"
+    exit 1
+  fi
+
+  # Split into prefix (everything before last dot) and starting minor (last number)
+  BASE_VERSION="${FULL_VERSION%.*}"   # e.g. 2.0
+  START_MINOR="${FULL_VERSION##*.}"   # e.g. 12
+
+  echo "BASE_VERSION=$BASE_VERSION" > "$FOLDER_CONFIG"
+  echo "START_MINOR=$START_MINOR"  >> "$FOLDER_CONFIG"
+  echo "Saved: prefix='$BASE_VERSION', starting minor='$START_MINOR' for '$(basename "$SOURCE")'."
+else
+  source "$FOLDER_CONFIG"
+fi
+
+# ─── Find next version number ─────────────────────────────────────────────────
+BASE_NAME=$(basename "$SOURCE")
+PARENT_DIR=$(dirname "$SOURCE")
+
+if [ -n "$FORCE_MINOR" ]; then
+  # --force: use exactly this number, ignore existing folders, then clear the force
+  NEXT="$FORCE_MINOR"
+  echo "BASE_VERSION=$BASE_VERSION"  > "$FOLDER_CONFIG"
+  echo "START_MINOR=$FORCE_MINOR"   >> "$FOLDER_CONFIG"
+  echo "FORCE_MINOR="               >> "$FOLDER_CONFIG"
+else
+  # Find highest existing minor version >= START_MINOR
+  LAST=$(ls -d "${PARENT_DIR}/${BASE_NAME}-${BASE_VERSION}".* 2>/dev/null \
+    | grep -oP '\d+
+
+DEST="${PARENT_DIR}/${BASE_NAME}-${BASE_VERSION}.${NEXT}"
+
+# ─── Copy ─────────────────────────────────────────────────────────────────────
+cp -r "$SOURCE" "$DEST"
+echo "✓ Backed up '$(basename "$SOURCE")' → '$DEST'"
+; then
+    echo "Error: version must be in format like 2.0.15"
+    exit 1
+  fi
+
+  CONFIG_KEY=$(echo "$SOURCE" | tr '/' '_' | tr ' ' '_')
+  FOLDER_CONFIG="$CONFIG_DIR/${CONFIG_KEY}.cfg"
+
+  if [ ! -f "$FOLDER_CONFIG" ]; then
+    echo "Error: no config found for '$SOURCE'. Run a backup first."
+    exit 1
+  fi
+
+  BASE_VERSION="${NEW_VERSION%.*}"
+  START_MINOR="${NEW_VERSION##*.}"
+
+  echo "BASE_VERSION=$BASE_VERSION"   > "$FOLDER_CONFIG"
+  echo "START_MINOR=$START_MINOR"   >> "$FOLDER_CONFIG"
+  echo "FORCE_MINOR="               >> "$FOLDER_CONFIG"
+  echo "✓ Next backup of '$(basename "$SOURCE")' will be '$NEW_VERSION'"
+  exit 0
+fi
+
+# ─── Force version override ───────────────────────────────────────────────────
+# Usage: backup_project --force 2.0.15 [folder]
+if [[ "$1" == "--force" ]]; then
+  NEW_VERSION="$2"
+  SOURCE="$(realpath "${3:-$(pwd)}")"
+
+  if ! echo "$NEW_VERSION" | grep -qP '^\d+(\.\d+)*\.\d+
+
+# ─── Resolve source folder ────────────────────────────────────────────────────
+# If no argument given, use current directory
+if [ -z "$1" ]; then
+  SOURCE="$(pwd)"
+else
+  SOURCE="$1"
+fi
+
+# Strip trailing slash, resolve to absolute path
+SOURCE="$(realpath "${SOURCE%/}")"
+
+if [ ! -d "$SOURCE" ]; then
+  echo "Error: '$SOURCE' is not a directory."
+  exit 1
+fi
+
+# ─── Load or create config for this source folder ────────────────────────────
+mkdir -p "$CONFIG_DIR"
+
+CONFIG_KEY=$(echo "$SOURCE" | tr '/' '_' | tr ' ' '_')
+FOLDER_CONFIG="$CONFIG_DIR/${CONFIG_KEY}.cfg"
+
+if [ ! -f "$FOLDER_CONFIG" ]; then
+  echo "First time backing up '$(basename "$SOURCE")'."
+  read -rp "Enter starting version (e.g. 2.0.12): " FULL_VERSION
+
+  # Validate format: must be X.Y.Z (digits and dots, at least one dot, ends in digits)
+  if ! echo "$FULL_VERSION" | grep -qP '^\d+(\.\d+)*\.\d+$'; then
+    echo "Error: version must be in format like 2.0.12 or 1.0.0"
+    exit 1
+  fi
+
+  # Split into prefix (everything before last dot) and starting minor (last number)
+  BASE_VERSION="${FULL_VERSION%.*}"   # e.g. 2.0
+  START_MINOR="${FULL_VERSION##*.}"   # e.g. 12
+
+  echo "BASE_VERSION=$BASE_VERSION" > "$FOLDER_CONFIG"
+  echo "START_MINOR=$START_MINOR"  >> "$FOLDER_CONFIG"
+  echo "Saved: prefix='$BASE_VERSION', starting minor='$START_MINOR' for '$(basename "$SOURCE")'."
+else
+  source "$FOLDER_CONFIG"
+fi
+
+# ─── Find next version number ─────────────────────────────────────────────────
+BASE_NAME=$(basename "$SOURCE")
+PARENT_DIR=$(dirname "$SOURCE")
+
+# Find highest existing minor version, but only consider numbers >= START_MINOR
+LAST=$(ls -d "${PARENT_DIR}/${BASE_NAME}-${BASE_VERSION}".* 2>/dev/null \
+  | grep -oP '\d+$' \
+  | awk -v start="$START_MINOR" '$1 >= start' \
+  | sort -n \
+  | tail -1)
+
+if [ -z "$LAST" ]; then
+  NEXT="$START_MINOR"
+else
+  NEXT=$((LAST + 1))
+fi
+
+DEST="${PARENT_DIR}/${BASE_NAME}-${BASE_VERSION}.${NEXT}"
+
+# ─── Copy ─────────────────────────────────────────────────────────────────────
+cp -r "$SOURCE" "$DEST"
+echo "✓ Backed up '$(basename "$SOURCE")' → '$DEST'"
+; then
+    echo "Error: version must be in format like 2.0.15"
+    exit 1
+  fi
+
+  CONFIG_KEY=$(echo "$SOURCE" | tr '/' '_' | tr ' ' '_')
+  FOLDER_CONFIG="$CONFIG_DIR/${CONFIG_KEY}.cfg"
+
+  if [ ! -f "$FOLDER_CONFIG" ]; then
+    echo "Error: no config found for '$SOURCE'. Run a backup first."
+    exit 1
+  fi
+
+  BASE_VERSION="${NEW_VERSION%.*}"
+  FORCE_MINOR="${NEW_VERSION##*.}"
+
+  echo "BASE_VERSION=$BASE_VERSION"     > "$FOLDER_CONFIG"
+  echo "START_MINOR=$FORCE_MINOR"      >> "$FOLDER_CONFIG"
+  echo "FORCE_MINOR=$FORCE_MINOR"      >> "$FOLDER_CONFIG"
+  echo "✓ Next backup of '$(basename "$SOURCE")' will be forced to '$NEW_VERSION' (ignoring existing folders)"
+  exit 0
+fi
+
+# ─── Resolve source folder ────────────────────────────────────────────────────
+# If no argument given, use current directory
+if [ -z "$1" ]; then
+  SOURCE="$(pwd)"
+else
+  SOURCE="$1"
+fi
+
+# Strip trailing slash, resolve to absolute path
+SOURCE="$(realpath "${SOURCE%/}")"
+
+if [ ! -d "$SOURCE" ]; then
+  echo "Error: '$SOURCE' is not a directory."
+  exit 1
+fi
+
+# ─── Load or create config for this source folder ────────────────────────────
+mkdir -p "$CONFIG_DIR"
+
+CONFIG_KEY=$(echo "$SOURCE" | tr '/' '_' | tr ' ' '_')
+FOLDER_CONFIG="$CONFIG_DIR/${CONFIG_KEY}.cfg"
+
+if [ ! -f "$FOLDER_CONFIG" ]; then
+  echo "First time backing up '$(basename "$SOURCE")'."
+  read -rp "Enter starting version (e.g. 2.0.12): " FULL_VERSION
+
+  # Validate format: must be X.Y.Z (digits and dots, at least one dot, ends in digits)
+  if ! echo "$FULL_VERSION" | grep -qP '^\d+(\.\d+)*\.\d+$'; then
+    echo "Error: version must be in format like 2.0.12 or 1.0.0"
+    exit 1
+  fi
+
+  # Split into prefix (everything before last dot) and starting minor (last number)
+  BASE_VERSION="${FULL_VERSION%.*}"   # e.g. 2.0
+  START_MINOR="${FULL_VERSION##*.}"   # e.g. 12
+
+  echo "BASE_VERSION=$BASE_VERSION" > "$FOLDER_CONFIG"
+  echo "START_MINOR=$START_MINOR"  >> "$FOLDER_CONFIG"
+  echo "Saved: prefix='$BASE_VERSION', starting minor='$START_MINOR' for '$(basename "$SOURCE")'."
+else
+  source "$FOLDER_CONFIG"
+fi
+
+# ─── Find next version number ─────────────────────────────────────────────────
+BASE_NAME=$(basename "$SOURCE")
+PARENT_DIR=$(dirname "$SOURCE")
+
+# Find highest existing minor version, but only consider numbers >= START_MINOR
+LAST=$(ls -d "${PARENT_DIR}/${BASE_NAME}-${BASE_VERSION}".* 2>/dev/null \
+  | grep -oP '\d+$' \
+  | awk -v start="$START_MINOR" '$1 >= start' \
+  | sort -n \
+  | tail -1)
+
+if [ -z "$LAST" ]; then
+  NEXT="$START_MINOR"
+else
+  NEXT=$((LAST + 1))
+fi
+
+DEST="${PARENT_DIR}/${BASE_NAME}-${BASE_VERSION}.${NEXT}"
+
+# ─── Copy ─────────────────────────────────────────────────────────────────────
+cp -r "$SOURCE" "$DEST"
+echo "✓ Backed up '$(basename "$SOURCE")' → '$DEST'"
+ \
+    | awk -v start="$START_MINOR" '$1 >= start' \
+    | sort -n \
+    | tail -1)
+
+  if [ -z "$LAST" ]; then
+    NEXT="$START_MINOR"
+  else
+    NEXT=$((LAST + 1))
+  fi
+fi
+
+DEST="${PARENT_DIR}/${BASE_NAME}-${BASE_VERSION}.${NEXT}"
+
+# ─── Copy ─────────────────────────────────────────────────────────────────────
+cp -r "$SOURCE" "$DEST"
+echo "✓ Backed up '$(basename "$SOURCE")' → '$DEST'"
+; then
+    echo "Error: version must be in format like 2.0.15"
+    exit 1
+  fi
+
+  CONFIG_KEY=$(echo "$SOURCE" | tr '/' '_' | tr ' ' '_')
+  FOLDER_CONFIG="$CONFIG_DIR/${CONFIG_KEY}.cfg"
+
+  if [ ! -f "$FOLDER_CONFIG" ]; then
+    echo "Error: no config found for '$SOURCE'. Run a backup first."
+    exit 1
+  fi
+
+  BASE_VERSION="${NEW_VERSION%.*}"
+  START_MINOR="${NEW_VERSION##*.}"
+
+  echo "BASE_VERSION=$BASE_VERSION"   > "$FOLDER_CONFIG"
+  echo "START_MINOR=$START_MINOR"   >> "$FOLDER_CONFIG"
+  echo "FORCE_MINOR="               >> "$FOLDER_CONFIG"
+  echo "✓ Next backup of '$(basename "$SOURCE")' will be '$NEW_VERSION'"
+  exit 0
+fi
+
+# ─── Force version override ───────────────────────────────────────────────────
+# Usage: backup_project --force 2.0.15 [folder]
+if [[ "$1" == "--force" ]]; then
+  NEW_VERSION="$2"
+  SOURCE="$(realpath "${3:-$(pwd)}")"
+
+  if ! echo "$NEW_VERSION" | grep -qP '^\d+(\.\d+)*\.\d+
+
+# ─── Resolve source folder ────────────────────────────────────────────────────
+# If no argument given, use current directory
+if [ -z "$1" ]; then
+  SOURCE="$(pwd)"
+else
+  SOURCE="$1"
+fi
+
+# Strip trailing slash, resolve to absolute path
+SOURCE="$(realpath "${SOURCE%/}")"
+
+if [ ! -d "$SOURCE" ]; then
+  echo "Error: '$SOURCE' is not a directory."
+  exit 1
+fi
+
+# ─── Load or create config for this source folder ────────────────────────────
+mkdir -p "$CONFIG_DIR"
+
+CONFIG_KEY=$(echo "$SOURCE" | tr '/' '_' | tr ' ' '_')
+FOLDER_CONFIG="$CONFIG_DIR/${CONFIG_KEY}.cfg"
+
+if [ ! -f "$FOLDER_CONFIG" ]; then
+  echo "First time backing up '$(basename "$SOURCE")'."
+  read -rp "Enter starting version (e.g. 2.0.12): " FULL_VERSION
+
+  # Validate format: must be X.Y.Z (digits and dots, at least one dot, ends in digits)
+  if ! echo "$FULL_VERSION" | grep -qP '^\d+(\.\d+)*\.\d+$'; then
+    echo "Error: version must be in format like 2.0.12 or 1.0.0"
+    exit 1
+  fi
+
+  # Split into prefix (everything before last dot) and starting minor (last number)
+  BASE_VERSION="${FULL_VERSION%.*}"   # e.g. 2.0
+  START_MINOR="${FULL_VERSION##*.}"   # e.g. 12
+
+  echo "BASE_VERSION=$BASE_VERSION" > "$FOLDER_CONFIG"
+  echo "START_MINOR=$START_MINOR"  >> "$FOLDER_CONFIG"
+  echo "Saved: prefix='$BASE_VERSION', starting minor='$START_MINOR' for '$(basename "$SOURCE")'."
+else
+  source "$FOLDER_CONFIG"
+fi
+
+# ─── Find next version number ─────────────────────────────────────────────────
+BASE_NAME=$(basename "$SOURCE")
+PARENT_DIR=$(dirname "$SOURCE")
+
+# Find highest existing minor version, but only consider numbers >= START_MINOR
+LAST=$(ls -d "${PARENT_DIR}/${BASE_NAME}-${BASE_VERSION}".* 2>/dev/null \
+  | grep -oP '\d+$' \
+  | awk -v start="$START_MINOR" '$1 >= start' \
+  | sort -n \
+  | tail -1)
+
+if [ -z "$LAST" ]; then
+  NEXT="$START_MINOR"
+else
+  NEXT=$((LAST + 1))
+fi
+
+DEST="${PARENT_DIR}/${BASE_NAME}-${BASE_VERSION}.${NEXT}"
+
+# ─── Copy ─────────────────────────────────────────────────────────────────────
+cp -r "$SOURCE" "$DEST"
+echo "✓ Backed up '$(basename "$SOURCE")' → '$DEST'"
+; then
+    echo "Error: version must be in format like 2.0.15"
+    exit 1
+  fi
+
+  CONFIG_KEY=$(echo "$SOURCE" | tr '/' '_' | tr ' ' '_')
+  FOLDER_CONFIG="$CONFIG_DIR/${CONFIG_KEY}.cfg"
+
+  if [ ! -f "$FOLDER_CONFIG" ]; then
+    echo "Error: no config found for '$SOURCE'. Run a backup first."
+    exit 1
+  fi
+
+  BASE_VERSION="${NEW_VERSION%.*}"
+  FORCE_MINOR="${NEW_VERSION##*.}"
+
+  echo "BASE_VERSION=$BASE_VERSION"     > "$FOLDER_CONFIG"
+  echo "START_MINOR=$FORCE_MINOR"      >> "$FOLDER_CONFIG"
+  echo "FORCE_MINOR=$FORCE_MINOR"      >> "$FOLDER_CONFIG"
+  echo "✓ Next backup of '$(basename "$SOURCE")' will be forced to '$NEW_VERSION' (ignoring existing folders)"
+  exit 0
+fi
+
+# ─── Resolve source folder ────────────────────────────────────────────────────
+# If no argument given, use current directory
+if [ -z "$1" ]; then
+  SOURCE="$(pwd)"
+else
+  SOURCE="$1"
+fi
+
+# Strip trailing slash, resolve to absolute path
+SOURCE="$(realpath "${SOURCE%/}")"
+
+if [ ! -d "$SOURCE" ]; then
+  echo "Error: '$SOURCE' is not a directory."
+  exit 1
+fi
+
+# ─── Load or create config for this source folder ────────────────────────────
+mkdir -p "$CONFIG_DIR"
+
+CONFIG_KEY=$(echo "$SOURCE" | tr '/' '_' | tr ' ' '_')
+FOLDER_CONFIG="$CONFIG_DIR/${CONFIG_KEY}.cfg"
+
+if [ ! -f "$FOLDER_CONFIG" ]; then
+  echo "First time backing up '$(basename "$SOURCE")'."
+  read -rp "Enter starting version (e.g. 2.0.12): " FULL_VERSION
+
+  # Validate format: must be X.Y.Z (digits and dots, at least one dot, ends in digits)
+  if ! echo "$FULL_VERSION" | grep -qP '^\d+(\.\d+)*\.\d+$'; then
+    echo "Error: version must be in format like 2.0.12 or 1.0.0"
+    exit 1
+  fi
+
+  # Split into prefix (everything before last dot) and starting minor (last number)
+  BASE_VERSION="${FULL_VERSION%.*}"   # e.g. 2.0
+  START_MINOR="${FULL_VERSION##*.}"   # e.g. 12
+
+  echo "BASE_VERSION=$BASE_VERSION" > "$FOLDER_CONFIG"
+  echo "START_MINOR=$START_MINOR"  >> "$FOLDER_CONFIG"
+  echo "Saved: prefix='$BASE_VERSION', starting minor='$START_MINOR' for '$(basename "$SOURCE")'."
+else
+  source "$FOLDER_CONFIG"
+fi
+
+# ─── Find next version number ─────────────────────────────────────────────────
+BASE_NAME=$(basename "$SOURCE")
+PARENT_DIR=$(dirname "$SOURCE")
+
+# Find highest existing minor version, but only consider numbers >= START_MINOR
+LAST=$(ls -d "${PARENT_DIR}/${BASE_NAME}-${BASE_VERSION}".* 2>/dev/null \
+  | grep -oP '\d+$' \
+  | awk -v start="$START_MINOR" '$1 >= start' \
+  | sort -n \
+  | tail -1)
+
+if [ -z "$LAST" ]; then
+  NEXT="$START_MINOR"
+else
+  NEXT=$((LAST + 1))
+fi
+
+DEST="${PARENT_DIR}/${BASE_NAME}-${BASE_VERSION}.${NEXT}"
+
+# ─── Copy ─────────────────────────────────────────────────────────────────────
+cp -r "$SOURCE" "$DEST"
+echo "✓ Backed up '$(basename "$SOURCE")' → '$DEST'"