diff --git a/src/github.sh b/src/github.sh
index 6a1692d..c13c5fe 100755
--- a/src/github.sh
+++ b/src/github.sh
@@ -8,50 +8,48 @@ github::get_pr_number() {
 
 github::get_commit_diff() {
   local -r pr_number="$1"
-  local -r files_to_ignore="${2}"
+  local -r files_to_ignore="$2"
+  local -r api_url="$GITHUB_API_URL/repos/$GITHUB_REPOSITORY/pulls/$pr_number"
 
-  if [ -z "$files_to_ignore" ]; then
-    local -r body=$(curl -sSL -H "Authorization: token $GITHUB_TOKEN" -H "$GITHUB_API_HEADER" "$GITHUB_API_URL/repos/$GITHUB_REPOSITORY/pulls/$pr_number")
-
-    echo "$body"
+  if [[ -z "$files_to_ignore" ]]; then
+    curl -sSL -H "Authorization: token $GITHUB_TOKEN" -H "$GITHUB_API_HEADER" "$api_url"
   else
-    local -r body=$(curl -sSL -H "Authorization: token $GITHUB_TOKEN" -H "$GITHUB_API_HEADER" "$GITHUB_API_URL/repos/$GITHUB_REPOSITORY/pulls/$pr_number/files?per_page=100")
+    local body
+    body=$(curl -sSL -H "Authorization: token $GITHUB_TOKEN" -H "Accept: application/vnd.github.v3+json" "$api_url/files?per_page=100")
 
     local diffs=""
+    while read -r file; do
+      local filename status
+      filename=$(jq -r '.filename' <<< "$file")
+      status=$(jq -r '.status' <<< "$file")
 
-    for file in $(echo "$body" | jq -r '.[] | @base64'); do
-      _jq() {
-        echo ${file} | base64 -d | jq -r ${1}
-      }
-
-      filename=$(_jq '.filename')
-      status=$(_jq '.status')
-      ignore=false
-
-      if [ "$status" == "removed" ]; then
-        continue
-      fi
-
-      for pattern in $files_to_ignore; do
-        if [[ $filename == $pattern ]]; then
-          ignore=true
-          break
-        fi
-      done
+      [[ "$status" == "removed" ]] && continue
 
-      if [ "$ignore" = false ]; then
-        diffs+=$(_jq '.patch')
+      if ! github::should_ignore_file "$filename" "$files_to_ignore"; then
+        diffs+=$(jq -r '.patch' <<< "$file")
         diffs+=$'\n\n'
       fi
-    done
+    done < <(jq -c '.[]' <<< "$body")
 
     echo "$diffs"
   fi
 }
 
+github::should_ignore_file() {
+  local -r filename="$1"
+  local -r files_to_ignore="$2"
+
+  for pattern in $files_to_ignore; do
+    [[ "$filename" == $pattern ]] && return 0
+  done
+
+  return 1
+}
+
 github::comment() {
   local -r comment="$1"
   local -r pr_number="$2"
+  local -r api_url="$GITHUB_API_URL/repos/$GITHUB_REPOSITORY/issues/$pr_number/comments"
 
   curl -sSL \
     -H "Authorization: token $GITHUB_TOKEN" \
@@ -59,5 +57,5 @@ github::comment() {
     -X POST \
     -H "Content-Type: application/json" \
     -d "$(jq -n --arg comment "$comment" '{body: $comment}')" \
-    "$GITHUB_API_URL/repos/$GITHUB_REPOSITORY/issues/$pr_number/comments"
+    "$api_url"
 }
\ No newline at end of file
diff --git a/src/main.sh b/src/main.sh
index 2668c00..1480563 100755
--- a/src/main.sh
+++ b/src/main.sh
@@ -1,6 +1,8 @@
 #!/usr/bin/env bash
 
-trap "exit 1" TERM
+set -euo pipefail
+
+trap 'exit 1' TERM
 export TOP_PID=$$
 
 source "$HOME_DIR/src/utils.sh"
@@ -12,7 +14,8 @@ source "$HOME_DIR/src/gpt.sh"
 ##? Usage:
 ##?   main.sh --github_token=<token> --open_ai_api_key=<token> --gpt_model_name=<name> --github_api_url=<url> --files_to_ignore=<files>
 main() {
-  eval "$(docpars -h "$(grep "^##?" "$HOME_DIR/src/main.sh" | cut -c 5-)" : "$@")"
+  local github_token open_ai_api_key gpt_model_name github_api_url files_to_ignore
+  eval "$(docpars -h "$(grep "^##?" "${BASH_SOURCE[0]}" | cut -c 5-)" : "$@")"
 
   utils::verify_required_env_vars
 
@@ -21,21 +24,21 @@ main() {
   export OPEN_AI_API_KEY="$open_ai_api_key"
   export GPT_MODEL="$gpt_model_name"
 
-  local -r pr_number=$(github::get_pr_number)
-  local -r commit_diff=$(github::get_commit_diff "$pr_number" "${files_to_ignore[*]}")
+  local pr_number commit_diff gpt_response
+  pr_number=$(github::get_pr_number)
+  commit_diff=$(github::get_commit_diff "$pr_number" "${files_to_ignore[*]}")
 
-  if [ -z "$commit_diff" ]; then
+  if [[ -z "$commit_diff" ]]; then
     utils::log_info "Nothing in the commit diff."
-    exit
+    exit 0
   fi
 
-  local -r gpt_response=$(gpt::prompt_model "$commit_diff")
+  gpt_response=$(gpt::prompt_model "$commit_diff")
 
-  if [ -z "$gpt_response" ]; then
-    utils::log_error "GPT's response was NULL. Double check your API key and billing details."
+  if [[ -z "$gpt_response" ]]; then
+    utils::log_error "GPT's response was empty. Double check your API key and billing details."
+    exit 1
   fi
 
   github::comment "$gpt_response" "$pr_number"
-
-  exit $?
 }
diff --git a/src/utils.sh b/src/utils.sh
index 087b259..afee402 100755
--- a/src/utils.sh
+++ b/src/utils.sh
@@ -1,25 +1,37 @@
 #!/usr/bin/env bash
 
+# ANSI color codes
+readonly RED='\e[1;91m'
+readonly BLUE='\e[1;94m'
+readonly RESET='\e[0m'
+
 utils::log_info() {
-  echo -e "[\\e[1;94mINFO\\e[0m] $@"
+  printf "[${BLUE}INFO${RESET}] %s\n" "$*"
 }
 
 utils::log_error() {
-  echo -e "[\\e[1;91mERROR\\e[0m] $@" 1>&2
+  printf "[${RED}ERROR${RESET}] %s\n" "$*" >&2
   exit 1
 }
 
 utils::verify_required_env_vars() {
-  utils::env_variable_exist "GITHUB_REPOSITORY"
-  utils::env_variable_exist "GITHUB_EVENT_PATH"
-  utils::env_variable_exist "github_token"
-  utils::env_variable_exist "github_api_url"
-  utils::env_variable_exist "open_ai_api_key"
-  utils::env_variable_exist "gpt_model_name"
+  local required_vars=(
+    "GITHUB_REPOSITORY"
+    "GITHUB_EVENT_PATH"
+    "github_token"
+    "github_api_url"
+    "open_ai_api_key"
+    "gpt_model_name"
+  )
+
+  for var in "${required_vars[@]}"; do
+    utils::env_variable_exist "$var"
+  done
 }
 
 utils::env_variable_exist() {
-  if [[ -z "${!1}" ]]; then
-    utils::log_error "The env variable '$1' is required."
+  local var_name="$1"
+  if [[ -z "${!var_name}" ]]; then
+    utils::log_error "The env variable '$var_name' is required."
   fi
 }