Unity Clips Auto Baking Importer

using System;
using System.Collections.Generic;
using UnityEngine;
using UnityEditor;

public class AnimImporter : AssetPostprocessor
{
    // Always require a prefix to use this Custom Importer script
    const bool REQUIRE_PREFIX_MATCH_IN_ASSET_NAME = true;
    // The prefix in the Asset name to trigger this script
    const String CUSTOM_IMPORT_PREFIX = "AG_";
    // Overrides existing clips already imported in Unity
    const bool ALWAYS_OVERWRITE_EXISTING_CLIPS = false;
    // If set to true, clip name ending with any of the following suffixes will be looped
    const bool AUTODETECT_LOOP = true;
    static String[] AUTOLOOP_SUFFIXES = { "_Held", "_Loop" };

    void OnPreprocessAnimation()
    {
        ModelImporter modelImporter = assetImporter as ModelImporter;
        String assetName = System.IO.Path.GetFileNameWithoutExtension(modelImporter.assetPath);
        //Debug.Log($"Importing animations from \"{assetName}\"");
        if (REQUIRE_PREFIX_MATCH_IN_ASSET_NAME == true && assetName.StartsWith(CUSTOM_IMPORT_PREFIX) == false)
        {
            //Debug.Log($"Does not have the import prefix, skipping {assetName}");
            return;
        }

        ModelImporterClipAnimation[] importedClips = modelImporter.clipAnimations;
        ModelImporterClipAnimation[] defaultClips = modelImporter.defaultClipAnimations;
        List<ModelImporterClipAnimation> importedAnimations = new List<ModelImporterClipAnimation>();

        int modifiedCount = 0;
        for (int i = 0; i < defaultClips.Length; i++)
        {
            ModelImporterClipAnimation anim = defaultClips[i];
            if (ALWAYS_OVERWRITE_EXISTING_CLIPS == false && importedClips != null && importedClips.Length > 0)
            {
                bool skipClip = false;
                for (int j = 0; j < importedClips.Length; j++)
                {
                    if (importedClips[j].name == anim.name)
                    {
                        // Use the already existing imported clip without modification
                        importedAnimations.Add(importedClips[j]);
                        skipClip = true;
                        break;
                    }
                }
                if (skipClip == true)
                {
                    continue;
                }
            }
            // This is a new clip, set default parameters
            modifiedCount++;
            if (AUTODETECT_LOOP == true)
            {
                foreach (String suffix in AUTOLOOP_SUFFIXES)
                {
                    if (anim.name.EndsWith(suffix) == true)
                    {
                        anim.loopTime = true;
                    }
                }
            }
            anim.heightFromFeet = false;
            anim.keepOriginalOrientation = true;
            anim.keepOriginalPositionXZ = true;
            anim.keepOriginalPositionY = true;
            anim.lockRootHeightY = true;
            anim.lockRootPositionXZ = true;
            anim.lockRootRotation = true;

            importedAnimations.Add(anim);
        }
        // Assign all the modified default animations as the imported clips
        modelImporter.clipAnimations = importedAnimations.ToArray();
        //Debug.Log($"Imported {modelImporter.clipAnimations.Length} clip(s) | Modified: {modifiedCount}");
    }
}