Package created

Editor/Skibitsky.Unity.StaticAssetLoader.Editor.asmdef

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+{
+    "name": "Skibitsky.Unity.StaticAssetLoader.Editor",
+    "references": [],
+    "includePlatforms": [
+        "Editor"
+    ],
+    "excludePlatforms": [],
+    "allowUnsafeCode": false,
+    "overrideReferences": false,
+    "precompiledReferences": [],
+    "autoReferenced": true,
+    "defineConstraints": [],
+    "versionDefines": [],
+    "noEngineReferences": false
+}

Editor/StaticAssetLoader.cs

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+using System.Collections.Generic;
+using System.Linq;
+using UnityEditor;
+using Object = UnityEngine.Object;
+
+namespace Skibitsky.Unity.Editor
+{
+    public static class StaticAssetLoader
+    {
+        /// <summary>
+        /// Load first asset of specified type
+        /// </summary>
+        public static T LoadAsset<T>() where T : Object
+        {
+            var array = LoadAssetArray<T>().ToArray();
+            return array.Length > 0 ? LoadAssetArray<T>().First() : null;
+        }
+
+        /// <summary>
+        /// Load all assets of specified type
+        /// </summary>
+        public static IEnumerable<T> LoadAssetArray<T>() where T : Object
+        {
+            var assetCandidates = AssetDatabase.FindAssets($"t:{typeof(T)}");
+            return assetCandidates
+                .Select(AssetDatabase.GUIDToAssetPath)
+                .Select(AssetDatabase.LoadAssetAtPath<T>);
+        } 
+    }
+}
+

README.md

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+# Static Asset Loader
+
+> Load asset from any project directory by type
+
+Very useful for loading configuration files of editor tools.
+
+## Usage
+
+```csharp
+public class MyEditorWindow : EditorWindow
+{
+    private MyScriptableObject LoadConfiguration()
+    {
+        return StaticAssetLoader.LoadAsset<MyScriptableObject>();
+    }
+}
+```
+
+## Installation
+
+### Install via OpenUPM
+
+The package is available on the [openupm registry](https://openupm.com). It's recommended to install it via [openupm-cli](https://github.com/openupm/openupm-cli).
+
+```
+openupm add com.skibitsky.static-asset-loader
+```
+
+### Install via Git URL
+
+Open *Packages/manifest.json* with your favorite text editor. Add the following line to the dependencies block.
+
+    {
+        "dependencies": {
+            "com.skibitsky.static-asset-loader": "https://github.com/skibitsky/static-asset-loader.git"
+        }
+    }
+
+Notice: Unity Package Manager records the current commit to a lock entry of the *manifest.json*. To update to the latest version, change the hash value manually or remove the lock entry to resolve the package.
+
+    "lock": {
+      "com.skibitsky.static-asset-loader": {
+        "revision": "master",
+        "hash": "..."
+      }
+    }
+

package.json

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+{
+  "name": "com.skibitsky.static-asset-loader",
+  "version": "1.0.0",
+  "displayName": "Static Asset Loader",
+  "description": "Load asset from any project directory by type",
+  "repository": "skibitsky/static-asset-loader",
+  "author": {
+    "name": "Gleb Skibitsky",
+    "email": "gleb@skibitsky.com",
+    "url": "https://skibitsky.com"
+  },
+  "unity": "",
+  "license": "MIT",
+  "dependencies": {
+  }
+}