diff --git a/cd.sh b/cd.sh
index 01a8ca8..f255508 100644
--- a/cd.sh
+++ b/cd.sh
@@ -75,20 +75,21 @@ local variable
         ;;
         *) cd_error_os "CD_OS_ID" ;;
     esac
-    # ci / github
+    # continuous integration platform
     if [ "${GITHUB_ACTIONS}" ] ; then
+        # forgejo / gitea / github
         CD_SERVER_URL="${GITHUB_SERVER_URL}"
         CD_PROJECTS_GROUP="$(dirname "${GITHUB_REPOSITORY}")"
         CD_PROJECT_NAME="$(basename "${GITHUB_REPOSITORY}")"
         CD_PROJECT_BRANCH="${GITHUB_REF_NAME}"
-    # ci / gitlab
     elif [ "${GITLAB_CI}" ] ; then
+        # gitlab
         CD_SERVER_URL="${CI_SERVER_URL}"
         CD_PROJECTS_GROUP="$(dirname "${CI_PROJECT_PATH}")"
         CD_PROJECT_NAME="$(basename "${CI_PROJECT_PATH}")"
         CD_PROJECT_BRANCH="${CI_COMMIT_BRANCH}"
-    # ci / none
     else
+        # unsupported
         cd_error_ci "ø"
     fi
     #