diff --git a/yazi-plugin/src/config/config.rs b/yazi-plugin/src/config/config.rs
index 50dc3b6b..0e1f853d 100644
--- a/yazi-plugin/src/config/config.rs
+++ b/yazi-plugin/src/config/config.rs
@@ -1,4 +1,4 @@
-use mlua::{IntoLua, Lua, LuaSerdeExt, SerializeOptions, Table, Value};
+use mlua::{IntoLua, Lua, LuaSerdeExt, MetaMethod, SerializeOptions, Table, Value};
 use yazi_boot::BOOT;
 use yazi_config::{MANAGER, PREVIEW, THEME};
 
@@ -50,7 +50,7 @@ impl<'a> Config<'a> {
 		})?;
 
 		let fetcher = self.lua.create_table()?;
-		fetcher.set_metatable(Some(self.lua.create_table_from([("__index", index)])?));
+		fetcher.set_metatable(Some(self.lua.create_table_from([(MetaMethod::Index.name(), index)])?));
 
 		self.lua.globals().raw_set("PLUGIN", fetcher)?;
 		Ok(self)
diff --git a/yazi-plugin/src/elements/elements.rs b/yazi-plugin/src/elements/elements.rs
index 028b10d5..3de6fa76 100644
--- a/yazi-plugin/src/elements/elements.rs
+++ b/yazi-plugin/src/elements/elements.rs
@@ -1,4 +1,4 @@
-use mlua::{AnyUserData, IntoLua, Lua, Table, Value};
+use mlua::{AnyUserData, IntoLua, Lua, MetaMethod, Table, Value};
 use tracing::error;
 
 use super::Renderable;
@@ -34,7 +34,7 @@ pub fn compose(lua: &Lua) -> mlua::Result<Table> {
 	})?;
 
 	let ui = lua.create_table_with_capacity(0, 20)?;
-	ui.set_metatable(Some(lua.create_table_from([("__index", index)])?));
+	ui.set_metatable(Some(lua.create_table_from([(MetaMethod::Index.name(), index)])?));
 
 	Ok(ui)
 }
diff --git a/yazi-plugin/src/elements/paragraph.rs b/yazi-plugin/src/elements/paragraph.rs
index a4074603..65490a68 100644
--- a/yazi-plugin/src/elements/paragraph.rs
+++ b/yazi-plugin/src/elements/paragraph.rs
@@ -1,6 +1,6 @@
 use std::time::Duration;
 
-use mlua::{FromLua, Lua, MultiValue, Table, Value};
+use mlua::{FromLua, Lua, MetaMethod, MultiValue, Table, Value};
 
 use super::Rect;
 use crate::RtRef;
@@ -34,7 +34,7 @@ impl Paragraph {
 	pub fn compose(lua: &Lua) -> mlua::Result<Table> {
 		let mt = lua.create_table_from([
 			(
-				"__call",
+				MetaMethod::Call.name(),
 				lua.create_function(|lua, (_, area, lines): (Table, Rect, Value)| {
 					warn_deprecated(lua.named_registry_value::<RtRef>("rt")?.current());
 					lua
@@ -45,7 +45,7 @@ impl Paragraph {
 				})?,
 			),
 			(
-				"__index",
+				MetaMethod::Index.name(),
 				lua.create_function(|lua, (_, key): (Table, mlua::String)| {
 					warn_deprecated(lua.named_registry_value::<RtRef>("rt")?.current());
 					lua
diff --git a/yazi-plugin/src/error.rs b/yazi-plugin/src/error.rs
index b79d5626..a31a2d1d 100644
--- a/yazi-plugin/src/error.rs
+++ b/yazi-plugin/src/error.rs
@@ -1,4 +1,6 @@
-use mlua::{IntoLua, Lua, MetaMethod, UserData, UserDataFields, UserDataMethods};
+use std::borrow::Cow;
+
+use mlua::{ExternalError, Lua, MetaMethod, UserData, UserDataFields, UserDataMethods, Value};
 
 pub enum Error {
 	Io(std::io::Error),
@@ -12,6 +14,14 @@ impl Error {
 
 		lua.globals().raw_set("Error", lua.create_table_from([("custom", new)])?)
 	}
+
+	fn to_string(&self) -> Cow<str> {
+		match self {
+			Error::Io(e) => Cow::Owned(e.to_string()),
+			Error::Serde(e) => Cow::Owned(e.to_string()),
+			Error::Custom(s) => Cow::Borrowed(s),
+		}
+	}
 }
 
 impl UserData for Error {
@@ -26,11 +36,20 @@ impl UserData for Error {
 
 	fn add_methods<M: UserDataMethods<Self>>(methods: &mut M) {
 		methods.add_meta_method(MetaMethod::ToString, |lua, me, ()| {
-			Ok(match me {
-				Error::Io(e) => e.to_string().into_lua(lua),
-				Error::Serde(e) => e.to_string().into_lua(lua),
-				Error::Custom(s) => lua.create_string(s)?.into_lua(lua),
-			})
+			lua.create_string(me.to_string().as_ref())
+		});
+		methods.add_meta_function(MetaMethod::Concat, |lua, (lhs, rhs): (Value, Value)| {
+			match (lhs, rhs) {
+				(Value::String(l), Value::UserData(r)) => {
+					let r = r.borrow::<Self>()?;
+					lua.create_string([l.as_bytes().as_ref(), r.to_string().as_bytes()].concat())
+				}
+				(Value::UserData(l), Value::String(r)) => {
+					let l = l.borrow::<Self>()?;
+					lua.create_string([l.to_string().as_bytes(), r.as_bytes().as_ref()].concat())
+				}
+				_ => Err("only string can be concatenated with Error".into_lua_err()),
+			}
 		});
 	}
 }
diff --git a/yazi-plugin/src/fs/fs.rs b/yazi-plugin/src/fs/fs.rs
index 6faa920b..33c9813b 100644
--- a/yazi-plugin/src/fs/fs.rs
+++ b/yazi-plugin/src/fs/fs.rs
@@ -1,5 +1,5 @@
 use globset::GlobBuilder;
-use mlua::{ExternalError, ExternalResult, Function, IntoLua, IntoLuaMulti, Lua, Table, Value};
+use mlua::{ExternalError, ExternalResult, Function, IntoLua, IntoLuaMulti, Lua, MetaMethod, Table, Value};
 use tokio::fs;
 use yazi_shared::fs::remove_dir_clean;
 
@@ -22,7 +22,7 @@ pub fn compose(lua: &Lua) -> mlua::Result<Table> {
 	})?;
 
 	let fs = lua.create_table_with_capacity(0, 10)?;
-	fs.set_metatable(Some(lua.create_table_from([("__index", index)])?));
+	fs.set_metatable(Some(lua.create_table_from([(MetaMethod::Index.name(), index)])?));
 
 	Ok(fs)
 }
@@ -53,11 +53,11 @@ fn write(lua: &Lua) -> mlua::Result<Function> {
 
 fn remove(lua: &Lua) -> mlua::Result<Function> {
 	lua.create_async_function(|lua, (type_, url): (mlua::String, UrlRef)| async move {
-		let result = match &*type_.to_str()? {
-			"file" => fs::remove_file(&*url).await,
-			"dir" => fs::remove_dir(&*url).await,
-			"dir_all" => fs::remove_dir_all(&*url).await,
-			"dir_clean" => Ok(remove_dir_clean(&url).await),
+		let result = match type_.as_bytes().as_ref() {
+			b"file" => fs::remove_file(&*url).await,
+			b"dir" => fs::remove_dir(&*url).await,
+			b"dir_all" => fs::remove_dir_all(&*url).await,
+			b"dir_clean" => Ok(remove_dir_clean(&url).await),
 			_ => Err("Removal type must be 'file', 'dir', 'dir_all', or 'dir_clean'".into_lua_err())?,
 		};
 
diff --git a/yazi-plugin/src/loader/require.rs b/yazi-plugin/src/loader/require.rs
index 1f6c1116..8f45bea2 100644
--- a/yazi-plugin/src/loader/require.rs
+++ b/yazi-plugin/src/loader/require.rs
@@ -1,6 +1,6 @@
 use std::sync::Arc;
 
-use mlua::{ExternalResult, Function, IntoLua, Lua, MultiValue, ObjectLike, Table, Value};
+use mlua::{ExternalResult, Function, IntoLua, Lua, MetaMethod, MultiValue, ObjectLike, Table, Value};
 
 use super::LOADER;
 use crate::RtRef;
@@ -44,7 +44,7 @@ impl Require {
 		let id: Arc<str> = Arc::from(id);
 		let mt = lua.create_table_from([
 			(
-				"__index",
+				MetaMethod::Index.name(),
 				lua.create_function(move |lua, (ts, key): (Table, mlua::String)| {
 					match ts.raw_get::<Table>("__mod")?.raw_get::<Value>(&key)? {
 						Value::Function(_) => {
@@ -55,7 +55,7 @@ impl Require {
 				})?,
 			),
 			(
-				"__newindex",
+				MetaMethod::NewIndex.name(),
 				lua.create_function(move |_, (ts, key, value): (Table, mlua::String, Value)| {
 					ts.raw_get::<Table>("__mod")?.raw_set(key, value)
 				})?,
diff --git a/yazi-plugin/src/pubsub/mod.rs b/yazi-plugin/src/pubsub/mod.rs
index b1354290..9b9eb913 100644
--- a/yazi-plugin/src/pubsub/mod.rs
+++ b/yazi-plugin/src/pubsub/mod.rs
@@ -1,6 +1,6 @@
 #![allow(clippy::module_inception)]
 
-use mlua::{IntoLua, Lua, Table, Value};
+use mlua::{IntoLua, Lua, MetaMethod, Table, Value};
 
 yazi_macro::mod_flat!(pubsub);
 
@@ -22,7 +22,7 @@ pub(super) fn compose(lua: &Lua) -> mlua::Result<Table> {
 	})?;
 
 	let ps = lua.create_table_with_capacity(0, 10)?;
-	ps.set_metatable(Some(lua.create_table_from([("__index", index)])?));
+	ps.set_metatable(Some(lua.create_table_from([(MetaMethod::Index.name(), index)])?));
 
 	Ok(ps)
 }
diff --git a/yazi-plugin/src/url/url.rs b/yazi-plugin/src/url/url.rs
index 8cc9d994..bff074a3 100644
--- a/yazi-plugin/src/url/url.rs
+++ b/yazi-plugin/src/url/url.rs
@@ -62,9 +62,9 @@ impl Url {
 			reg.add_meta_method(MetaMethod::ToString, |lua, me, ()| {
 				lua.create_string(me.as_os_str().as_encoded_bytes())
 			});
-			reg.add_meta_method(MetaMethod::Concat, |lua, me, other: mlua::String| {
-				let me = me.as_os_str().as_encoded_bytes();
-				let other = other.as_bytes();
+			reg.add_meta_method(MetaMethod::Concat, |lua, lhs, rhs: mlua::String| {
+				let me = lhs.as_os_str().as_encoded_bytes();
+				let other = rhs.as_bytes();
 
 				let mut out = Vec::with_capacity(me.len() + other.len());
 				out.extend_from_slice(me);
diff --git a/yazi-plugin/src/utils/utils.rs b/yazi-plugin/src/utils/utils.rs
index 3e483cab..7812c86c 100644
--- a/yazi-plugin/src/utils/utils.rs
+++ b/yazi-plugin/src/utils/utils.rs
@@ -1,4 +1,4 @@
-use mlua::{IntoLua, Lua, Table, Value};
+use mlua::{IntoLua, Lua, MetaMethod, Table, Value};
 
 pub(super) struct Utils;
 
@@ -83,7 +83,7 @@ pub fn compose(lua: &Lua, isolate: bool) -> mlua::Result<Table> {
 	})?;
 
 	let ya = lua.create_table_with_capacity(0, 40)?;
-	ya.set_metatable(Some(lua.create_table_from([("__index", index)])?));
+	ya.set_metatable(Some(lua.create_table_from([(MetaMethod::Index.name(), index)])?));
 
 	Ok(ya)
 }