diff --git a/core/commands.go b/core/commands.go
index df08a9b..73abeca 100755
--- a/core/commands.go
+++ b/core/commands.go
@@ -5,19 +5,22 @@ import (
 	"log"
 )
 
+// represent a command to input to the bot through a Discord message
 type Command struct {
-	name string
-	desc string
-	example string
+	name string // name identifier
+	desc string // description
+	example string // usage example
 	command func(
 		s *discordgo.Session,
 		m *discordgo.MessageCreate,
-		message string)
+		message string) // command (a callback)
 }
 
+// register containing commands associated with their aliases
 var CommandRegister = make(
 	map[string]Command)
 
+// associate a Command with an alias within the command register
 func SetCommand(
 	aliases []string,
 	desc string,
@@ -34,6 +37,7 @@ func SetCommand(
 	}
 }
 
+// add commands to the register
 func CommandInit() {
 	SetCommand(
 		[]string{"/ggd audio", "/ggd tts"},
diff --git a/core/config.go b/core/config.go
index 91fb112..29f307b 100755
--- a/core/config.go
+++ b/core/config.go
@@ -7,6 +7,7 @@ import (
 	"gopkg.in/yaml.v2"
 )
 
+// entity storing configuration values loaded from a yaml file
 type Config struct {
 	Token string `yaml:"token"`
 	Name  string `yaml:"name"`
@@ -19,6 +20,7 @@ type Config struct {
 	} `yaml:"talkback"`
 }
 
+// loads the values from the yaml configuration file into the configuration register
 func (c *Config) LoadConf() *Config {
 	yamlFile, err := ioutil.ReadFile("config.yaml")
 	if err != nil {
@@ -31,4 +33,5 @@ func (c *Config) LoadConf() *Config {
 	return c
 }
 
+// global configuration register
 var ConfigRegister Config
diff --git a/core/messages.go b/core/messages.go
index 8d3cbf7..17c378a 100755
--- a/core/messages.go
+++ b/core/messages.go
@@ -3,6 +3,7 @@ package core
 import (
 	"bytes"
 	"fmt"
+	"log"
 	"math/rand"
 	"sort"
 	"strings"
@@ -47,6 +48,7 @@ func getHelpMessage() string {
 	return welcome + strings.Join(help, "")
 }
 
+// return random hats
 func getHatMessage() string {
 	hat := []string{"🧢", "👒", "⛑", "🎩", "🎓"}
 	rand.Seed(time.Now().UnixNano())
@@ -59,6 +61,8 @@ func getHatMessage() string {
 	return strings.Join(bag, " ")
 }
 
+// returns a random message if the processed message matchs with a pattern.
+// patterns are substrings belonging to a "domain" of lexical items
 func getTalkbackMessage(message string) string {
 	for _, t := range ConfigRegister.Talkback {
 		for _, p := range t.Domain.Patterns {
@@ -72,6 +76,7 @@ func getTalkbackMessage(message string) string {
 	return ""
 }
 
+// check if a message is a valid command. if yes, execute the command
 func MessageHandler(s *discordgo.Session, m *discordgo.MessageCreate) {
 	for alias, _ := range CommandRegister {
 		if strings.HasPrefix(m.Content, alias) {
@@ -113,12 +118,15 @@ func MessagePing(s *discordgo.Session, m *discordgo.MessageCreate, message strin
 	}
 }
 
+// generate TTS version of the message and upload it to the channel
 func MessageAudio(s *discordgo.Session, m *discordgo.MessageCreate, message string) {
+	log.Println("Messageaudio :", message)
 	var cleanMessage string = prepareTTSMessage(message)
 	filename, out := getAudioMessage(cleanMessage)
 	file := bytes.NewReader(out)
 	s.ChannelFileSend(m.ChannelID, filename, file)
 	// delete the receveid command after processing it. less clutter
+	log.Println("Messageaudio :", cleanMessage)
 	s.ChannelMessageDelete(m.ChannelID, m.ID)
 }
 
diff --git a/core/text.go b/core/text.go
index 59d243b..ef7f9c4 100755
--- a/core/text.go
+++ b/core/text.go
@@ -17,6 +17,7 @@ func removeCharacters(input string, characters string) string {
 }
 
 // https://stackoverflow.com/questions/34839659/how-can-i-easily-get-a-substring-in-go-while-guarding-against-slice-bounds-out
+// get a substring of size "max" from a string "s"
 func maxString(s string, max int) string {
 	if len(s) > max {
 		r := 0
@@ -45,6 +46,7 @@ func stripEmoji(msg string) string {
 	}
 }
 
+// sanitize received message for text-to-speech
 func prepareTTSMessage(msg string) string {
 	t1 := maxString(msg, 300)
 	t2 := stripEmoji(t1)
diff --git a/main.go b/main.go
index 4d6af70..75adb65 100755
--- a/main.go
+++ b/main.go
@@ -12,8 +12,11 @@ import (
 )
 
 func main() {
+	// load yaml config file into register
 	core.ConfigRegister.LoadConf()
+
 	core.CommandInit()
+
 	discord, err := discordgo.New("Bot " + core.ConfigRegister.Token)
 	if err != nil {
 		log.Println("error creating Discord session, ", err)
@@ -24,7 +27,6 @@ func main() {
 		discordgo.IntentsGuildMessages |
 		discordgo.IntentsGuildVoiceStates)
 
-
 	discord.AddHandler(core.MessageHandler)
 	discord.AddHandler(core.MessageTalkback)
 	discord.AddHandler(core.GuildCreate)