diff --git a/.husky/pre-commit b/.husky/pre-commit
new file mode 100644
index 00000000..f8ad42c0
--- /dev/null
+++ b/.husky/pre-commit
@@ -0,0 +1,3 @@
+npm run test && \
+npm run file-size && \
+git add .
diff --git a/package-lock.json b/package-lock.json
index 6bb8adf1..ab9d9fbd 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -10,14 +10,16 @@
 				"@eslint/js": "^9.1.1",
 				"@stylistic/eslint-plugin-js": "^1.8.0",
 				"editorconfig-checker": "^5.1.1",
+				"get-mp3-duration": "^1.0.0",
 				"globals": "^15.1.0",
 				"html-minifier-terser": "^7.1.0",
+				"husky": "^9.0.11",
 				"js-yaml": "^4.1.0",
 				"minify-xml": "^4.4.1"
 			},
 			"engines": {
-				"node": ">=20",
-				"npm": ">=10"
+				"node": "20",
+				"npm": "10"
 			}
 		},
 		"node_modules/@11ty/dependency-tree": {
@@ -1595,6 +1597,12 @@
 				"url": "https://github.com/sponsors/ljharb"
 			}
 		},
+		"node_modules/get-mp3-duration": {
+			"version": "1.0.0",
+			"resolved": "https://registry.npmjs.org/get-mp3-duration/-/get-mp3-duration-1.0.0.tgz",
+			"integrity": "sha512-SiTppS0shvqCJ8rky8E1Yi9thLoTTGq3Tjc4n4pmjo8BMuiQFN3cCfiaWmRFk/8TjhOQhPwrpJZJDvOcbPVwrw==",
+			"dev": true
+		},
 		"node_modules/glob": {
 			"version": "7.2.3",
 			"resolved": "https://registry.npmjs.org/glob/-/glob-7.2.3.tgz",
@@ -1813,6 +1821,21 @@
 				"node": ">= 6"
 			}
 		},
+		"node_modules/husky": {
+			"version": "9.0.11",
+			"resolved": "https://registry.npmjs.org/husky/-/husky-9.0.11.tgz",
+			"integrity": "sha512-AB6lFlbwwyIqMdHYhwPe+kjOC3Oc5P3nThEoW/AaO2BX3vJDjWPFxYLxokUZOo6RNX20He3AaT8sESs9NJcmEw==",
+			"dev": true,
+			"bin": {
+				"husky": "bin.mjs"
+			},
+			"engines": {
+				"node": ">=18"
+			},
+			"funding": {
+				"url": "https://github.com/sponsors/typicode"
+			}
+		},
 		"node_modules/ignore": {
 			"version": "5.3.1",
 			"resolved": "https://registry.npmjs.org/ignore/-/ignore-5.3.1.tgz",
diff --git a/package.json b/package.json
index d68ecf12..a85384da 100644
--- a/package.json
+++ b/package.json
@@ -9,7 +9,9 @@
 		"cover": "cd src && rsync --archive --compress cover.png wst@web-standards.ru:/var/www/web-standards.ru/podcast/",
 		"feed": "cd dist && rsync --archive --compress index.xml wst@web-standards.ru:/var/www/web-standards.ru/podcast/feed/",
 		"deploy": "npm run mp3 && npm run cover && npm run feed",
-		"new": "node scripts/new.js"
+		"new": "node scripts/new.js",
+		"file-size": "node scripts/file-size.js",
+		"prepare": "husky || true"
 	},
 	"engines": {
 		"node": "20",
@@ -20,8 +22,10 @@
 		"@eslint/js": "^9.1.1",
 		"@stylistic/eslint-plugin-js": "^1.8.0",
 		"editorconfig-checker": "^5.1.1",
+		"get-mp3-duration": "^1.0.0",
 		"globals": "^15.1.0",
 		"html-minifier-terser": "^7.1.0",
+		"husky": "^9.0.11",
 		"js-yaml": "^4.1.0",
 		"minify-xml": "^4.4.1"
 	}
diff --git a/scripts/file-size.js b/scripts/file-size.js
new file mode 100644
index 00000000..30fc8c4b
--- /dev/null
+++ b/scripts/file-size.js
@@ -0,0 +1,53 @@
+import fs from 'node:fs';
+import path from 'node:path';
+import getMP3Duration from 'get-mp3-duration';
+
+function isFileExist(filePath) {
+	try {
+		fs.statSync(filePath);
+		return true;
+	} catch {
+		return false;
+	}
+}
+
+const folderDataPath = path.join('src', 'episodes');
+const folderMediaPath = path.join('src', 'mp3');
+
+const dir = fs.opendirSync(folderDataPath, {
+	encoding: 'utf-8',
+	withFileTypes: true,
+});
+
+try {
+	let item = null;
+
+	while ((item = dir.readSync())) {
+		if (!item.isDirectory()) {
+			continue;
+		}
+
+		const episodeFolder = path.join(item.path, item.name);
+		const dataFilePath = path.join(episodeFolder, 'index.json');
+
+		if (isFileExist(dataFilePath)) {
+			continue;
+		}
+
+		const mediaFilePath = path.join(folderMediaPath, item.name + '.mp3');
+
+		if (!isFileExist(mediaFilePath)) {
+			console.log(`Файл '${mediaFilePath}' не найден`);
+			continue;
+		}
+
+		const fileBuffer = fs.readFileSync(mediaFilePath);
+		const fileSize = fileBuffer.byteLength;
+		const duration = getMP3Duration(fileBuffer);
+
+		const dataToSave = JSON.stringify({ fileSize, duration }, null, '\t');
+		fs.writeFileSync(dataFilePath, dataToSave, 'utf-8');
+	}
+} finally {
+	dir.closeSync();
+}