diff --git a/.editorconfig b/.editorconfig
index 007025f..0e36aef 100644
--- a/.editorconfig
+++ b/.editorconfig
@@ -28,7 +28,7 @@ indent_size = 1
 indent_size = 1
 indent_style = tab
 
-[{local/bin/*,**/*.sh,**/zshrc,config/*,scripts/*}]
+[{local/bin/*,local/dfm/*,**/*.sh,**/zshrc,config/*,scripts/*}]
 indent_size        = 2
 tab_width          = 2
 shell_variant      = bash # --language-variant
diff --git a/local/dfm/cmd/install.sh b/local/dfm/cmd/install.sh
new file mode 100755
index 0000000..a4744d1
--- /dev/null
+++ b/local/dfm/cmd/install.sh
@@ -0,0 +1,38 @@
+# Installation functions for dfm, the dotfile manager
+#
+# @author Ismo Vuorinen <https://github.com/ivuorinen>
+# @license MIT
+
+# @description Install all packages in the correct order
+function all()
+{
+  lib::log "Installing all packages..."
+  fonts
+  brew
+  asdf
+}
+
+# @description Install fonts
+function fonts()
+{
+  lib::log "Installing fonts..."
+  # implement fonts installation
+}
+
+# Install asdf and set it up.
+#
+# @description Install asdf
+function asdf()
+{
+  lib::log "Installing asdf..."
+  # implement asdf installation
+}
+
+# Install Homebrew and set it up.
+#
+# @description Installs Homebrew
+function brew()
+{
+  lib::log "Installing Homebrew..."
+  # implement Homebrew installation
+}
diff --git a/local/dfm/dfm b/local/dfm/dfm
new file mode 100755
index 0000000..3849215
--- /dev/null
+++ b/local/dfm/dfm
@@ -0,0 +1,58 @@
+#!/usr/bin/env bash
+# dfm - dotfiles manager
+
+set -euo pipefail
+
+# define default variables
+readonly SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+readonly CMD_DIR="${SCRIPT_DIR}/cmd"
+readonly LIB_DIR="${SCRIPT_DIR}/lib"
+readonly DEFAULT_CONFIG_PATH="$HOME/.config"
+readonly MAX_RETRIES=3
+export DEFAULT_INSTALL_DIR="$HOME/.local"
+export DEFAULT_VERBOSE=0
+export TEMP_DIR=$(mktemp -d)
+
+# Load the common and utility functions from the lib directory.
+source "${LIB_DIR}/common.sh"
+source "${LIB_DIR}/utils.sh"
+
+# Main function for the dfm script.
+#
+# The function checks if any arguments were provided. If no arguments are
+# provided, it lists all available commands. If a command name is provided,
+# it lists the available functions for that command. If a command and function
+# name are provided, it executes the function with the provided arguments.
+#
+# @param args The command-line arguments.
+# @return None
+main()
+{
+  if [[ $# -eq 0 ]]; then
+    main::list_available_commands
+    return 0
+  fi
+
+  local cmd="$1"
+  shift
+
+  if [[ $# -eq 0 ]]; then
+    # Näytä komennon saatavilla olevat funktiot
+    local cmd_file="${CMD_DIR}/${cmd}.sh"
+    if [[ -f "$cmd_file" ]]; then
+      list::print_group "Available functions for '$cmd'"
+      list::loop_functions "$cmd_file"
+    else
+      lib::error "Command '$cmd' not found"
+      return 1
+    fi
+    return 0
+  fi
+
+  local func="$1"
+  shift
+
+  main::execute_command "$cmd" "$func" "$@"
+}
+
+main "$@"
diff --git a/local/dfm/lib/common.sh b/local/dfm/lib/common.sh
new file mode 100755
index 0000000..aef8731
--- /dev/null
+++ b/local/dfm/lib/common.sh
@@ -0,0 +1,236 @@
+#!/usr/bin/env bash
+# dfm common functions for logging and error handling, etc.
+# Source this file to use the functions in your scripts.
+#
+# @author Ismo Vuorinen <https://github.com/ivuorinen>
+# @license MIT
+set -euo pipefail
+
+declare -A ERROR_CODES=(
+  [SUCCESS]=0
+  [INVALID_ARGUMENT]=1
+  [COMMAND_NOT_FOUND]=2
+  [FUNCTION_NOT_FOUND]=3
+  [EXECUTION_FAILED]=4
+)
+
+declare -A LOG_LEVELS=(
+  [DEBUG]=0
+  [INFO]=1
+  [WARN]=2
+  [ERROR]=3
+)
+LOG_LEVEL="${LOG_LEVEL:-INFO}"
+
+# Simple logging function
+#
+# @example
+# lib::log "Hello, world!"
+#
+# @description Log a message to the console
+# @param $* Message to log
+# @return void
+lib::log()
+{
+  printf '[%s] %s\n' "$(date '+%Y-%m-%d %H:%M:%S')" "$*"
+}
+
+# Simple error logging function
+#
+# @example
+# lib::error "Something went wrong"
+#
+# @description Log an error message to the console
+# @param $* Error message
+# @return void
+lib::error()
+{
+  printf '[%s] ERROR: %s\n' "$(date '+%Y-%m-%d %H:%M:%S')" "$*" >&2
+}
+
+# Handle an error by logging an error message to the console
+# and exiting with an error code based on the error type.
+#
+# @example
+# lib::error::handle $LINENO $0
+#
+# @description Handle an error
+# @param $1 Line number
+# @param $2 Command
+# @return void
+lib::error::handle()
+{
+  local exit_code=$?
+  local line_no=$1
+  local command=$2
+
+  case $exit_code in
+    ${ERROR_CODES[INVALID_ARGUMENT]})
+      lib::error "Invalid argument at line $line_no in command '$command'"
+      ;;
+    ${ERROR_CODES[COMMAND_NOT_FOUND]})
+      lib::error "Command not found at line $line_no"
+      ;;
+    ${ERROR_CODES[FUNCTION_NOT_FOUND]})
+      lib::error "Function not found at line $line_no in command '$command'"
+      ;;
+    ${ERROR_CODES[EXECUTION_FAILED]})
+      lib::error "Execution failed at line $line_no in command '$command'"
+      ;;
+    *)
+      lib::error "Unknown error ($exit_code) at line $line_no in command '$command'"
+      ;;
+  esac
+
+  return $exit_code
+}
+
+# Throw an error by logging an error message to the console and exiting
+# with an error code based on the error type. The error code name is used
+# to determine the error code from the ERROR_CODES associative array.
+# The error message is passed as arguments to the function.
+#
+# @example
+# lib::error::throw INVALID_ARGUMENT "Invalid argument"
+# lib::error::throw COMMAND_NOT_FOUND "Command not found"
+# lib::error::throw FUNCTION_NOT_FOUND "Function not found"
+# lib::error::throw EXECUTION_FAILED "Execution failed"
+#
+# @description Throw an error
+# @param $1 Error code name
+# @param $* Error message
+# @return void
+lib::error::throw()
+{
+  local code_name=$1
+  shift
+  local message=$*
+
+  lib::error "$message"
+  return "${ERROR_CODES[$code_name]}"
+}
+
+# Logs a message to the console if the current log level is set so that the
+# message is displayed. The log level is compared to the log level of the
+# message and if the message log level is greater than or equal to the current
+# log level, the message is displayed.
+# The log levels are defined in the LOG_LEVELS associative array.
+#
+# @example
+# logger::log "INFO" "This is an info message"
+# logger::log "DEBUG" "This is a debug message"
+# logger::log "WARN" "This is a warning message"
+# logger::log "ERROR" "This is an error message"
+#
+# @description Log a message to the console based on the log level setting.
+# @param $1 Log level
+# @param $2 Message
+# @return void
+logger::log()
+{
+  local level=$1
+  shift
+  local msg=$1
+
+  if [[ ${LOG_LEVELS[$level]} -ge ${LOG_LEVELS[$LOG_LEVEL]} ]]; then
+    printf '[%s] [%s]: %s\n' "$(date '+%Y-%m-%d %H:%M:%S')" "$level" "$msg" >&2
+  fi
+}
+
+# Logs a debug message to the console, if the current log level is set to DEBUG or greater.
+# The message is passed as arguments to the function.
+# The function is defined above.
+#
+# @example
+# logger::debug "This is a debug message"
+#
+# @description Log a debug message to the console
+# @param $* Message
+# @return void
+logger::debug()
+{
+  logger::log "DEBUG" "$@"
+}
+
+# Logs an info message to the console, if the current log level is set to INFO or greater.
+# The message is passed as arguments to the function.
+# The function is defined above.
+#
+# @example
+# logger::info "This is an info message"
+#
+# @description Log an info message to the console
+# @param $* Message
+# @return void
+logger::info()
+{
+  logger::log "INFO" "$@"
+}
+
+# Logs a warning message to the console, if the current log level is set to WARN or greater.
+# The message is passed as arguments to the function.
+# The function is defined above.
+#
+# @example
+# logger::warn "This is a warning message"
+#
+# @description Log a warning message to the console
+# @param $* Message
+# @return void
+logger::warn()
+{
+  logger::log "WARN" "$@"
+}
+
+# Logs an error message to the console, if the current log level is set to ERROR or greater.
+# The message is passed as arguments to the function.
+# The function is defined above.
+#
+# @example
+# logger::error "This is an error message"
+#
+# @description Log an error message to the console
+# @param $* Message
+# @return void
+logger::error()
+{
+  logger::log "ERROR" "$@"
+}
+
+# Cleanup function to remove temporary files and directories
+# when the script exits or is interrupted by a signal (e.g. Ctrl+C).
+# The function is registered with the `EXIT` trap.
+#
+# @description Remove temporary files and directories
+# @return void
+cleanup()
+{
+  local exit_code=$?
+  [ -d "$TEMP_DIR" ] && rm -rf "$TEMP_DIR"
+  exit $exit_code
+}
+
+# Register the cleanup function to run on EXIT signal.
+#
+# This will ensure that temporary files and directories are removed
+# when the script exits or is interrupted by a signal (e.g. Ctrl+C).
+# The cleanup function is defined above.
+trap cleanup EXIT
+
+# Handle errors by logging an error message to the console.
+#
+# The function is registered with the `ERR` trap.
+# The line number where the error occurred is passed as an argument to the function.
+# The function is defined above.
+#
+# @description Handle an error
+# @param $1 Line number
+# @return void
+handle_error()
+{
+  local exit_code=$?
+  local line_no=$1
+  logger::error "Failed at line ${line_no} with exit code ${exit_code}"
+}
+
+trap 'handle_error ${LINENO}' ERR
diff --git a/local/dfm/lib/utils.sh b/local/dfm/lib/utils.sh
new file mode 100755
index 0000000..a0828be
--- /dev/null
+++ b/local/dfm/lib/utils.sh
@@ -0,0 +1,334 @@
+#!/usr/bin/env bash
+# dfm utility functions for common tasks
+# Source this file to use the functions in your scripts.
+#
+# @author Ismo Vuorinen <https://github.com/ivuorinen>
+# @license MIT
+set -euo pipefail
+
+# ANSI escape codes
+readonly RESET="\033[0m"
+readonly BOLD="\033[1m"
+readonly DIM="\033[2m"
+readonly ITALIC="\033[3m"
+readonly UNDERLINE="\033[4m"
+
+# Colors
+readonly BLACK="\033[30m"
+readonly RED="\033[31m"
+readonly GREEN="\033[32m"
+readonly YELLOW="\033[33m"
+readonly BLUE="\033[34m"
+readonly MAGENTA="\033[35m"
+readonly CYAN="\033[36m"
+readonly WHITE="\033[37m"
+
+# Function to print formatted line
+list::print_formatted()
+{
+  local format=$1
+  shift
+  printf "${format}%s${RESET}\n" "$@"
+}
+
+# Function to print a header
+list::print_header()
+{
+  printf "\n  ${BOLD}${BLUE}%s${RESET}\n" "$1"
+  printf "%s\n" "  $(printf '%.s─' {1..60})"
+}
+
+# Function to print a group header
+list::print_group()
+{
+  local group=$1
+  printf "\n  ${YELLOW}${BOLD}%s${RESET}\n\n" "$group"
+}
+
+# Function to print a command
+list::print_command()
+{
+  local cmd=$1
+  local desc=${2:-""}
+  printf "  ${BOLD}${CYAN}%-15s${RESET} ${DIM}%s${RESET}\n" "$cmd" "$desc"
+}
+
+# Function to print a subcommand
+list::print_subcommand()
+{
+  local cmd=$1
+  local desc=${2:-""}
+  printf "    ${GREEN}%-13s${RESET} ${desc}\n" "$cmd"
+}
+
+list::loop_functions()
+{
+  while IFS= read -r func; do
+    # Get the function description from the function definition in the
+    # command file. If no description is found, print only the function name.
+    # The description is printed without the @description prefix.
+    # If the function is not found, print only the function name.
+    # The function name is printed with a bullet point.
+    local doc
+    doc=$(main::get_function_description "$cmd_file" "$func")
+    if [[ -n "$doc" ]]; then
+      list::print_subcommand "$func:" "${doc#*@description}"
+    else
+      list::print_subcommand "$func" ""
+    fi
+  done < <(main::get_command_functions "$cmd_file")
+}
+
+# Get the documentation for a function from a command file.
+list::get_function_docs()
+{
+  local cmd_file="$1"
+  local func="$2"
+
+  awk -v func="$func" '
+        # Start collecting documentation when a function is found and the line contains @
+        /^[[:space:]]*#[[:space:]]*@/ {
+            tag = $2
+            sub(/^[[:space:]]*#[[:space:]]*@[[:space:]]*[a-zA-Z]+[[:space:]]*/, "")
+            docs[tag] = $0
+            last_tag = tag
+        }
+
+        # Collect multi-line documentation
+        /^[[:space:]]*#/ && last_tag && !/^[[:space:]]*#[[:space:]]*@/ {
+            sub(/^[[:space:]]*#[[:space:]]*/, "")
+            docs[last_tag] = docs[last_tag] " " $0
+        }
+
+        # Empty line or comment line ends documentation
+        !/^[[:space:]]*#/ {
+            last_tag = ""
+        }
+
+        # When the function is found, print the documentation
+        $0 ~ "^[[:space:]]*(function[[:space:]]+)?" func "\\(\\)" {
+            for (tag in docs) {
+                printf "@%s %s\n", tag, docs[tag]
+            }
+        }
+    ' "$cmd_file"
+}
+
+# Check if a command exists in the current environment and return 0 if it does.
+# Otherwise, return 1.
+#
+# @example
+# if utils::is_installed curl; then
+#    echo "curl is installed"
+# else
+#  echo "curl is not installed"
+# fi
+#
+# @description Check if a command exists
+# @param $1 Command to check
+# @return 0 if the command exists, 1 otherwise
+utils::is_installed()
+{
+  command -v "$1" > /dev/null 2>&1
+}
+
+# Check if a directory exists in the current env PATH and return 0 if it does.
+# Otherwise, return 1.
+#
+# @example
+# if utils::in_path /usr/local/bin; then
+#   echo "/usr/local/bin is in PATH"
+# else
+#  echo "/usr/local/bin is not in PATH"
+# fi
+#
+# @description Check if a directory is in PATH
+# @param $1 Directory to check
+# @return 0 if the directory is in PATH, 1 otherwise
+utils::in_path()
+{
+  local cmd=$1
+  local result=1
+  IFS=: read -ra path <<< "$PATH"
+  for p in "${path[@]}"; do
+    if [[ -x "$p/$cmd" ]]; then
+      result=0
+      break
+    fi
+  done
+  return $result
+}
+
+# Retry a command until it succeeds or the maximum number of retries is reached.
+# Logs a warning message if the command fails and is retried after a short delay.
+#
+# @example
+# if utils::retry 3 curl -sSL https://example.com; then
+#    echo "Success"
+# else
+#   echo "Failed"
+# fi
+#
+# @description Retry a command
+# @param $1 Maximum number of retries
+# @param $2.. Command to run
+# @return 0 if the command succeeds, 1 otherwise
+# @dependencies logger::warn
+utils::retry()
+{
+  local tries=$1
+  shift
+  local count=1
+
+  until "$@"; do
+    [[ $count -gt $tries ]] && return 1
+    logger::warn "Failed, retry $count/$tries"
+    ((count++))
+    sleep 1
+  done
+  return 0
+}
+
+# Ask for confirmation before proceeding. The default value is used if the user
+# presses Enter without providing an answer.
+#
+# @example
+# if utils::interactive::confirm "Are you sure?"; then
+#    echo "Confirmed"
+# else
+#   echo "Not confirmed"
+# fi
+#
+# @description Confirm an action
+# @param $1 Prompt message
+# @param $2 Default value
+# @return 0 if the user confirms, 1 otherwise
+utils::interactive::confirm()
+{
+  local prompt=$1
+  local default=${2:-Y}
+
+  while true; do
+    read -rp "$prompt [Y/n]: " response
+    case ${response:-$default} in
+      [Yy]*) return 0 ;;
+      [Nn]*) return 1 ;;
+      *) echo "Please answer yes or no" ;;
+    esac
+  done
+}
+
+# Find all command files in the cmd directory and return them
+# as a space-separated string of filenames (e.g. "cmd1.sh cmd2.sh").
+#
+# The function uses a while loop to read the output of the find command
+# line by line. The -print0 option is used to separate the filenames with
+# a null character (\0) instead of a newline. This is necessary to handle
+# filenames with spaces correctly.
+#
+# The read command reads the null-separated filenames and appends them to
+# the cmd_files array. Finally, the function prints the array elements
+# separated by a space.
+#
+# @return A space-separated string of command files.
+main::find_commands()
+{
+  local cmd_files=()
+  while IFS= read -r -d '' file; do
+    cmd_files+=("$file")
+  done < <(find "$CMD_DIR" -type f -name "*.sh" -print0)
+  echo "${cmd_files[@]}"
+}
+
+# Get the function names from a command file.
+#
+# The function uses grep to find function definitions (function xxx() or xxx())
+# and sed to extract the function names. The function names are printed one per
+# line.
+#
+# @param cmd_file The command file to extract function names from.
+# @return A list of function names.
+main::get_command_functions()
+{
+  local cmd_file="$1"
+  # Etsitään funktiomäärittelyt (function xxx() tai xxx())
+  grep -E '^[[:space:]]*(function[[:space:]]+)?[a-zA-Z0-9_]+\(\)[[:space:]]*{' "$cmd_file" \
+    | sed -E 's/^[[:space:]]*(function[[:space:]]+)?([a-zA-Z0-9_]+).*/\2/'
+}
+
+# Get the description of a function from a command file.
+#
+# The function uses grep to find the function definition and sed to extract
+# the description. The description is printed without the @description prefix.
+#
+# @param cmd_file The command file to extract the function description from.
+# @param func The function name.
+# @return The function description.
+main::get_function_description()
+{
+  local cmd_file="$1"
+  local func="$2"
+
+  grep -B1 "^[[:space:]]*\(function[[:space:]]*\)\{0,1\}$func().*{" "$cmd_file" \
+    | grep "@description" \
+    | sed -E 's/^[[:space:]]*#[[:space:]]*@description[[:space:]]*//'
+}
+
+# List all available commands and their functions.
+#
+# The function uses main::find_commands to get a list of command files.
+# It then iterates over the files and prints the command name and
+# its functions.
+#
+# @return None
+main::list_available_commands()
+{
+  local cmd_files
+  cmd_files=$(main::find_commands)
+
+  list::print_header "dfm - dotfiles manager"
+  list::print_group "Available commands"
+
+  for cmd_file in $cmd_files; do
+    local cmd_name
+    cmd_name=$(basename "$cmd_file" .sh)
+    list::print_command "$cmd_name"
+
+    list::loop_functions "$cmd_file"
+  done
+}
+
+# Execute a command function.
+#
+# The function loads the command file and checks if the function exists.
+# If the function exists, it executes the function with the provided arguments.
+#
+# @param cmd The command name.
+# @param func The function name.
+# @param args The function arguments.
+# @return None
+main::execute_command()
+{
+  local cmd="$1"
+  shift
+  local func="$1"
+  shift
+
+  local cmd_file="${CMD_DIR}/${cmd}.sh"
+  if [[ ! -f "$cmd_file" ]]; then
+    lib::error "Command '$cmd' not found"
+    return 1
+  fi
+
+  # Source the command file
+  source "$cmd_file"
+
+  # Check if the function exists
+  if ! declare -f "$func" > /dev/null; then
+    lib::error "Function '$func' not found in command '$cmd'"
+    return 1
+  fi
+
+  # Run the function with the provided arguments
+  "$func" "$@"
+}