diff --git a/src_code/go_src/cocommit.go b/src_code/go_src/cocommit.go
index 402e972..ece86ec 100644
--- a/src_code/go_src/cocommit.go
+++ b/src_code/go_src/cocommit.go
@@ -6,6 +6,7 @@ import (
 	"os"
 	"os/exec"
 	"regexp"
+	"slices"
 	"strings"
 )
 
@@ -14,24 +15,28 @@ type user struct {
 	email    string
 }
 
+var users = make(map[string]user)
+var sb strings.Builder
+var all_flag = false
+
 func main() {
-	users := make(map[string]user)
+
 
 	// Reads a shell env variable :: author_file
 	authors := os.Getenv("author_file")
-	
+
 	file, err := os.Open(authors)
 	if err != nil {
 		print("File not found")
 		os.Exit(2)
 	}
 	defer file.Close()
-	
+
 	scanner := bufio.NewScanner(file)
-	
+
 	// eat a single input
 	scanner.Scan()
-	
+
 	// reads the input of authors file and formats accordingly
 	for scanner.Scan() {
 		info := strings.Split(scanner.Text(), "|")
@@ -39,30 +44,32 @@ func main() {
 		users[info[0]] = usr
 		users[info[1]] = usr
 	}
-	
+
 	if err := scanner.Err(); err != nil {
 		os.Exit(2)
 	}
-	
+
 	args := os.Args[1:]
 
 	NoInput(args, users)
-	
-	
+
+	excludeMode := []string{}
+
 	// builds the commit message with the selected authors
-	var sb strings.Builder
-	sb.WriteString(string(args[0])+"\n")
+	sb.WriteString(string(args[0]) + "\n")
 	reg, _ := regexp.Compile("([^:]+):([^:]+)")
 
-	for _, commiter := range args[1:] {
-		if _, ok := users[commiter]; ok {
-			sb.WriteString("\nCo-authored-by: ")
-			sb.WriteString(users[commiter].username)
-			sb.WriteString(" <")
-			sb.WriteString(users[commiter].email)
-			sb.WriteRune('>')
-		} else if match := reg.MatchString(commiter); match {
-			str := strings.Split(commiter, ":")
+	if args[1] == "all" || args[1] == "All" {
+		all_flag = true
+		goto skip_loop
+	}
+
+
+	for _, committer := range args[1:] {
+		if _, ok := users[committer]; ok {
+			sb_author(committer)
+		} else if match := reg.MatchString(committer); match {
+			str := strings.Split(committer, ":")
 
 			sb.WriteString("\nCo-authored-by: ")
 			sb.WriteString(str[0])
@@ -70,18 +77,32 @@ func main() {
 			sb.WriteString(str[1])
 			sb.WriteRune('>')
 
+		} else if committer[0] == '^' {
+			excludeMode = append(excludeMode, users[committer[1:]].username)
+
 		} else {
-			println(commiter, " was unknown. User either not defined or name typed wrong")
+			println(committer, " was unknown. User either not defined or name typed wrong")
 		}
 	}
-	// commit msg built
-	commit := sb.String()
+
+	skip_loop:
 	
+	if len(excludeMode) > 0 || all_flag {
+		add_x_users(excludeMode)
+	}
+
+
+	// commit msg built
+	commit := sb_build()
+
+	//NOTE: Uncomment for testing
+	//print(commit)
+
 	// commit shell command
 	cmd := exec.Command("git", "commit", "-m", commit)
 
 	// https://stackoverflow.com/questions/18159704/how-to-debug-exit-status-1-error-when-running-exec-command-in-golang
-	
+
 	cmd_output, err := cmd.CombinedOutput()
 
 	if err != nil {
@@ -92,7 +113,28 @@ func main() {
 
 }
 
-//TODO: move half this into another function and call before building users to improve performance
+func add_x_users(excludeMode []string) {
+	for key, user := range users {
+		if !slices.Contains(excludeMode, user.username) {
+			sb_author(key)
+			excludeMode = append(excludeMode, user.username)
+		}
+	}
+}
+
+func sb_build() string {
+	return sb.String()
+}
+
+func sb_author(committer string) {
+	sb.WriteString("\nCo-authored-by: ")
+	sb.WriteString(users[committer].username)
+	sb.WriteString(" <")
+	sb.WriteString(users[committer].email)
+	sb.WriteRune('>')
+}
+
+// TODO: move half this into another function and call before building users to improve performance
 func NoInput(args []string, users map[string]user) {
 	if len(args) < 2 {
 		// If you call binary with users prints users
@@ -103,9 +145,9 @@ func NoInput(args []string, users map[string]user) {
 			}
 			os.Exit(1)
 		}
-		// if calling binary with nothing or only string 
+		// if calling binary with nothing or only string
 		print("Usage: cocommit <commit message> <co-author1> [co-author2] [co-author3] || \n cocommit <commit message> <co-author1:email> [co-author2:email] [co-author3:email] || Mixes of both")
-		
+
 		os.Exit(1)
 	}
 }
diff --git a/src_code/go_src/cocommit_test.go b/src_code/go_src/cocommit_test.go
index 2cc4bb7..cf08549 100644
--- a/src_code/go_src/cocommit_test.go
+++ b/src_code/go_src/cocommit_test.go
@@ -3,6 +3,7 @@ package main
 import (
 	"os"
 	"os/exec"
+	"strings"
 	"testing"
 )
 
@@ -37,6 +38,50 @@ func Test_usersInput(t *testing.T) {
     }
     t.Fatalf("process ran with err %v, want exit status 1", err)
 }
+//TODO: Turn this into a fuzz test
+
+func Test_commit_message(t *testing.T) {
+    //authors := make(map[string]user)
+	users["test"] = user{username: "test", email: "test"} 
+    sb_author("test")
+    commit := sb_build()
+    if commit != "\nCo-authored-by: test <test>" {
+        t.Fatalf("String built incorrectly. Strings did not match: Created -> %s Expected -> Co-authored-by: test <test>",commit)
+    }
+}
+//TODO: Turn this into a fuzz test
+func Test_add_all(t *testing.T) {
+    for k := range users {
+        delete(users, k)
+    }
+    sb.Reset()
+    users["test1"] = user{username: "test1", email: "test1"}
+    users["test2"] = user{username: "test2", email: "test2"}  
+    users["test3"] = user{username: "test3", email: "test3"} 
+    all_flag = true
+    add_x_users([]string{})
+
+    commit := sb_build()
+    if !strings.Contains(commit, "\nCo-authored-by: test1 <test1>") || 
+    !strings.Contains(commit, "\nCo-authored-by: test2 <test2>") ||
+    !strings.Contains(commit, "\nCo-authored-by: test3 <test3>") {
+        t.Fatalf("String built incorrectly. Strings did not match: Created -> %s Expected -> Co-authored-by: test <test>",commit)
+    }
+}  
+
+func Test_exclude_user(t *testing.T) {
+    // Reusing users map from last test
+    excludeMode := []string{"test1"}
+
+    sb.Reset()
+
+    add_x_users(excludeMode)
+
+    commit := sb_build()
+    if strings.Contains(commit, "\nCo-authored-by: test1 <test1>") {
+        t.Fatalf("String built incorrectly. Strings did not match: Created -> %s Expected -> Co-authored-by: test <test>",commit)
+    } 
+}