A component that tracks other Unity GameObject components, and reports when and what exactly is missing

GameObjectMetadata.cs

using UnityEngine;

namespace KL.Utils.Behaviours {
    [DefaultExecutionOrder(int.MinValue)]
    [ExecuteInEditMode]
    public class GameObjectMetadata : MonoBehaviour {

        [SerializeField] private string[] components;
        
        private void Start() {
            #if !UNITY_EDITOR
            Destroy(this);
            #endif
        }

        #if UNITY_EDITOR
        void Update() {
            if (!UnityEditor.EditorApplication.isPlaying) {
                var comps = gameObject.GetComponents<Component>();
                if (!HasMissingComponents(comps)) {
                    UpdateKnownComponents(comps);
                }
            }
        }
        #endif

        private bool HasMissingComponents(Component[] comps) {
            for (int i = 0; i < comps.Length; i++) {
                if (comps[i] == null) {
                    Debug.LogErrorFormat(gameObject, 
                        "Missing component {0} on game object {1}", components[i], name);
                    return true;
                }
            }
            return false;
        }

        private void UpdateKnownComponents(Component[] comps) {
            components = new string[comps.Length];
            for (int i = 0; i < comps.Length; i++) {
                var ct = comps[i].GetType().ToString();
                Dbg.LogF("Setting component: {0}: {1}", i, ct);
                components[i] = ct;
            }
        }
    }
}