diff --git a/flake.nix b/flake.nix
index 9829338..ba975af 100644
--- a/flake.nix
+++ b/flake.nix
@@ -17,7 +17,7 @@
             tmux new-session -d -s $SESSION -c "$DIR" -n dev
             tmux send-keys -t $SESSION:0 'vim' C-m
             tmux split-window -h -p 30 -t $SESSION:0 -c "$DIR"
-            tmux send-keys -t $SESSION:0.1 'exec zsh' C-m
+            tmux send-keys -t $SESSION:0.1 'docker-compose up -d && docker exec -it ft_ping_dev bash' C-m
             tmux new-window -t $SESSION:1 -n git -c "$DIR"
             tmux send-keys -t $SESSION:1 'lazygit' C-m
           fi
@@ -34,6 +34,8 @@
             clang-tools
             fastmod
             tree
+            docker
+            docker-compose
           ] ++ (if stdenv.isLinux then [ pkgs.valgrind ] else [ ]);
         };
       });
diff --git a/parsing/includes/parsing.h b/parsing/includes/parsing.h
new file mode 100644
index 0000000..9763822
--- /dev/null
+++ b/parsing/includes/parsing.h
@@ -0,0 +1,38 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   parsing.h                                          :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: rparodi <rparodi@student.42.fr>            +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2026/03/23 14:49:37 by rparodi           #+#    #+#             */
+/*   Updated: 2026/03/28 15:25:03 by rparodi          ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#pragma once
+#include "struct.h"
+#include <stdbool.h>
+#include <stdio.h>
+
+#ifdef BONUS
+# define BONUS 1
+#endif
+#ifndef BONUS
+# define BONUS 0
+#endif
+
+typedef struct s_args {
+	char	short_option;
+	char	*long_option;
+	char	*usage;
+	char	*description;
+	bool	is_mandatory;
+}	t_args;
+
+extern const t_args _flags[];
+
+size_t args_size();
+void print_help(const size_t size);
+void print_usage(const size_t size);
+uint64_t check_num_arguments(char *arg);
diff --git a/parsing/parsing.mk b/parsing/parsing.mk
index 2ffcac9..5bd2249 100644
--- a/parsing/parsing.mk
+++ b/parsing/parsing.mk
@@ -6,7 +6,7 @@
 #    By: rparodi <marvin@42.fr>                     +#+  +:+       +#+         #
 #                                                 +#+#+#+#+#+   +#+            #
 #    Created: 2023/11/12 11:05:05 by rparodi           #+#    #+#              #
-#    Updated: 2026/03/24 11:44:52 by rparodi          ###   ########.fr        #
+#    Updated: 2026/03/28 15:15:58 by rparodi          ###   ########.fr        #
 #                                                                              #
 # **************************************************************************** #
 
@@ -16,7 +16,10 @@
 MODULE_NAME = parsing
 NAME = lib$(MODULE_NAME).a
 
-SRC =	sources/parsing.c
+SRC =	sources/utils.c \
+		sources/help.c \
+		sources/usage.c \
+		sources/parsing.c
 
 CC ?= clang
 CFLAGS ?= -Werror -Wextra -Wall
diff --git a/sources/ping.c b/sources/ping.c
new file mode 100644
index 0000000..703f1a7
--- /dev/null
+++ b/sources/ping.c
@@ -0,0 +1,23 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   ping.c                                             :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: rparodi <rparodi@student.42.fr>            +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2026/03/23 14:49:14 by rparodi           #+#    #+#             */
+/*   Updated: 2026/03/28 12:45:52 by rparodi          ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "ping.h"
+#include "struct.h"
+#include <stdlib.h>
+#include <strings.h>
+
+int main(int argc, char *argv[]) {
+	t_flags flags;
+	bzero(&flags, sizeof(t_flags));
+	parsing_args(argc, argv, &flags);
+	return (EXIT_SUCCESS);
+}