diff --git a/internal/config.go b/internal/config.go
new file mode 100644
index 0000000..8b29ba0
--- /dev/null
+++ b/internal/config.go
@@ -0,0 +1,120 @@
+package internal
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+
+	"github.com/BurntSushi/toml"
+	"github.com/Shieldine/git-profile/models"
+)
+
+type Config struct {
+	Profiles []models.ProfileConfig `toml:"users"`
+}
+
+var (
+	Conf       Config
+	configPath string
+)
+
+func init() {
+	exePath, err := os.Executable()
+	if err != nil {
+		fmt.Println("Error determining executable path:", err)
+		os.Exit(1)
+	}
+	configPath = filepath.Join(filepath.Dir(exePath), "config.toml")
+
+	if _, err := os.Stat(configPath); os.IsNotExist(err) {
+		file, err := os.Create(configPath)
+		if err != nil {
+			fmt.Printf("Failed to create config file: %v\n", err)
+			os.Exit(1)
+		}
+		file.Close()
+		Conf = Config{Profiles: []models.ProfileConfig{}}
+	}
+
+	err = LoadConfig()
+	if err != nil {
+		fmt.Println("Error loading config file:", err)
+		os.Exit(1)
+	}
+}
+
+func LoadConfig() error {
+	if _, err := toml.DecodeFile(configPath, &Conf); err != nil {
+		return fmt.Errorf("failed to decode internal file: %v", err)
+	}
+	return nil
+}
+
+func SaveConfig() error {
+	file, err := os.Create(configPath)
+	if err != nil {
+		return fmt.Errorf("failed to save config file: %v", err)
+	}
+	defer file.Close()
+	if err := toml.NewEncoder(file).Encode(Conf); err != nil {
+		return fmt.Errorf("failed to encode config to file: %v", err)
+	}
+	return nil
+}
+
+func AddProfile(profile models.ProfileConfig) error {
+	for _, existingProfile := range Conf.Profiles {
+		if existingProfile.ProfileName == profile.ProfileName {
+			return fmt.Errorf("profile with name %s already exists", profile.ProfileName)
+		}
+	}
+
+	Conf.Profiles = append(Conf.Profiles, profile)
+	return SaveConfig()
+}
+
+func EditProfile(profileName string, updatedProfile models.ProfileConfig) error {
+	for i, existingProfile := range Conf.Profiles {
+		if existingProfile.ProfileName == profileName {
+			Conf.Profiles[i] = updatedProfile
+			return SaveConfig()
+		}
+	}
+	return fmt.Errorf("profile with name %s not found", profileName)
+}
+
+func DeleteProfile(profileName string) error {
+	for i, existingProfile := range Conf.Profiles {
+		if existingProfile.ProfileName == profileName {
+			Conf.Profiles = append(Conf.Profiles[:i], Conf.Profiles[i+1:]...)
+			return SaveConfig()
+		}
+	}
+	return fmt.Errorf("profile with name %s not found", profileName)
+}
+
+func GetProfileByName(profileName string) models.ProfileConfig {
+	for _, existingProfile := range Conf.Profiles {
+		if existingProfile.ProfileName == profileName {
+			return existingProfile
+		}
+	}
+	return models.ProfileConfig{}
+}
+
+func GetAllProfiles() []models.ProfileConfig {
+	return Conf.Profiles
+}
+
+func GetConfigPath() string {
+	return configPath
+}
+
+func ClearConfig() error {
+	file, err := os.Create(configPath)
+	if err != nil {
+		return fmt.Errorf("failed to reset config file: %v", err)
+	}
+	defer file.Close()
+	return nil
+}
diff --git a/internal/git.go b/internal/git.go
new file mode 100644
index 0000000..5034d20
--- /dev/null
+++ b/internal/git.go
@@ -0,0 +1,90 @@
+package internal
+
+import (
+	"errors"
+	"os"
+	"os/exec"
+	"strings"
+)
+
+func CheckGitRepo() bool {
+	cmd := exec.Command("git", "rev-parse", "--is-inside-work-tree")
+	if err := cmd.Run(); err != nil {
+		return false
+	}
+	return true
+}
+
+func GetRepoOrigin() (string, error) {
+	if !CheckGitRepo() {
+		return "", errors.New("not a git repository")
+	}
+	cmd := exec.Command("git", "config", "--get", "remote.origin.url")
+	output, err := cmd.Output()
+	if err != nil {
+		return "", err
+	}
+
+	originURL := strings.TrimSpace(string(output))
+
+	if strings.HasPrefix(originURL, "https://") {
+		originURL = strings.TrimPrefix(originURL, "https://")
+	} else if strings.HasPrefix(originURL, "http://") {
+		originURL = strings.TrimPrefix(originURL, "http://")
+	} else if strings.HasPrefix(originURL, "git@") {
+		originURL = strings.TrimPrefix(originURL, "git@")
+		if idx := strings.Index(originURL, ":"); idx != -1 {
+			originURL = originURL[:idx]
+		}
+	}
+
+	if idx := strings.Index(originURL, "/"); idx != -1 {
+		originURL = originURL[:idx]
+	}
+
+	return originURL, nil
+}
+
+func SetUserName(name string) error {
+	if !CheckGitRepo() {
+		return errors.New("not a git repository")
+	}
+	cmd := exec.Command("git", "config", "user.name", name)
+	cmd.Stdout = os.Stdout
+	cmd.Stderr = os.Stderr
+	return cmd.Run()
+}
+
+func GetUserName() (string, error) {
+	if !CheckGitRepo() {
+		return "", errors.New("not a git repository")
+	}
+	cmd := exec.Command("git", "config", "--get", "user.name")
+	output, err := cmd.Output()
+	if err != nil {
+		return "", err
+	}
+	return strings.TrimSpace(string(output)), nil
+}
+
+func SetUserEmail(email string) error {
+	if !CheckGitRepo() {
+		return errors.New("not a git repository")
+	}
+	cmd := exec.Command("git", "config", "user.email", email)
+	cmd.Stdout = os.Stdout
+	cmd.Stderr = os.Stderr
+	return cmd.Run()
+}
+
+func GetUserEmail() (string, error) {
+	if !CheckGitRepo() {
+		return "", errors.New("not a git repository")
+	}
+	cmd := exec.Command("git", "config", "--get", "user.email")
+	output, err := cmd.Output()
+	if err != nil {
+		return "", err
+	}
+	return strings.TrimSpace(string(output)), nil
+}
diff --git a/models/profile_config.go b/models/profile_config.go
new file mode 100644
index 0000000..691191b
--- /dev/null
+++ b/models/profile_config.go
@@ -0,0 +1,9 @@
+package models
+
+type ProfileConfig struct {
+	ProfileName string `toml:"profile_name"`
+	Name        string `toml:"name"`
+	Email       string `toml:"email"`
+	SigningKey  string `toml:"signing_key"`
+	Origin      string `toml:"origin"`
+}