diff --git a/composer.json b/composer.json
index df823125..3fe11081 100644
--- a/composer.json
+++ b/composer.json
@@ -22,7 +22,7 @@
     "require-dev": {
         "alleyinteractive/alley-coding-standards": "^2.0",
         "mantle-framework/testkit": "^1.0",
-        "szepeviktor/phpstan-wordpress": "^1.1"
+        "szepeviktor/phpstan-wordpress": "^2.0"
     },
     "config": {
         "allow-plugins": {
@@ -50,6 +50,13 @@
         "phpcbf": "phpcbf .",
         "phpcs": "phpcs .",
         "phpstan": "phpstan --memory-limit=512M",
+        "lint": [
+            "@phpcs",
+            "@phpstan"
+        ],
+        "lint:fix": [
+            "@phpcbf"
+        ],
         "phpunit": "phpunit",
         "release": "npx @alleyinteractive/create-release@latest",
         "test": [
diff --git a/src/assets.php b/src/assets.php
index e47af0de..57b7a160 100644
--- a/src/assets.php
+++ b/src/assets.php
@@ -57,7 +57,9 @@ function get_entry_asset_map( string $dir_entry_name ): array {
 		$asset_file_path = trailingslashit( $base_path ) . 'index.asset.php';
 
 		if ( validate_path( $asset_file_path ) ) {
-			return include $asset_file_path; // phpcs:ignore WordPressVIPMinimum.Files.IncludingFile.IncludingFile, WordPressVIPMinimum.Files.IncludingFile.UsingVariable
+			$asset_map = include $asset_file_path; // phpcs:ignore WordPressVIPMinimum.Files.IncludingFile.IncludingFile, WordPressVIPMinimum.Files.IncludingFile.UsingVariable
+
+			return is_array( $asset_map ) ? $asset_map : []; // @phpstan-ignore-line returns array
 		}
 	}
 
@@ -69,7 +71,7 @@ function get_entry_asset_map( string $dir_entry_name ): array {
  *
  * @param string $dir_entry_name The entry point directory name.
  *
- * @return array<int, string> The asset's dependency array.
+ * @return array<string> The asset's dependency array.
  */
 function get_asset_dependency_array( string $dir_entry_name ): array {
 	$asset_arr = get_entry_asset_map( $dir_entry_name );
diff --git a/src/meta.php b/src/meta.php
index 2abf526e..08d9d426 100644
--- a/src/meta.php
+++ b/src/meta.php
@@ -95,7 +95,7 @@ function register_meta_helper(
 			'all' === $object_slugs
 		)
 	) {
-		return register_meta( $object_type, $meta_key, $args );
+		return register_meta( $object_type, $meta_key, $args ); // @phpstan-ignore-line array given
 	}
 
 	// Fix potential errors since we're allowing `$object_slugs` to be a string or array.
@@ -107,14 +107,14 @@ function register_meta_helper(
 	switch ( $object_type ) {
 		case 'post':
 			foreach ( $object_slugs as $object_slug ) {
-				if ( ! register_post_meta( $object_slug, $meta_key, $args ) ) {
+				if ( ! register_post_meta( $object_slug, $meta_key, $args ) ) { // @phpstan-ignore-line array given
 					return false;
 				}
 			}
 			break;
 		case 'term':
 			foreach ( $object_slugs as $object_slug ) {
-				if ( ! register_term_meta( $object_slug, $meta_key, $args ) ) {
+				if ( ! register_term_meta( $object_slug, $meta_key, $args ) ) { // @phpstan-ignore-line array given
 					return false;
 				}
 			}
@@ -146,13 +146,24 @@ function register_post_meta_from_defs(): void {
 
 	// Loop through definitions and register each.
 	foreach ( $definitions as $meta_key => $definition ) {
+		if ( ! is_array( $definition ) ) {
+			_doing_it_wrong( __FUNCTION__, 'Post meta definition items must be an array.', '1.0.0' );
+
+			continue;
+		}
+
 		// Extract post types.
 		$post_types = $definition['post_types'] ?? [];
+
 		// Unset since $definition is passed as register_meta args.
 		unset( $definition['post_types'] );
 
 		// Relocate schema, if specified at the top level.
 		if ( ! empty( $definition['schema'] ) ) {
+			if ( ! isset( $definition['show_in_rest'] ) || ! is_array( $definition['show_in_rest'] ) ) {
+				$definition['show_in_rest'] = [];
+			}
+
 			$definition['show_in_rest']['schema'] = $definition['schema'];
 			// Unset since $definition is passed as register_meta args.
 			unset( $definition['schema'] );
@@ -161,9 +172,9 @@ function register_post_meta_from_defs(): void {
 		// Register the meta.
 		register_meta_helper(
 			'post',
-			$post_types,
+			$post_types, // @phpstan-ignore-line array given
 			$meta_key,
-			$definition
+			$definition,  // @phpstan-ignore-line array given
 		);
 	}
 }