diff --git a/.gitmodules b/.gitmodules
index 044283d..80242eb 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -10,9 +10,6 @@
 [submodule "framework/3rd/glm"]
 	path = framework/3rd/glm
 	url = https://github.com/g-truc/glm.git
-[submodule "framework/3rd/moon"]
-	path = framework/3rd/moon
-	url = https://github.com/siffiejoe/lua-moon.git
 [submodule "framework/3rd/termbox"]
 	path = framework/3rd/termbox
 	url = https://github.com/nullgemm/termbox_next.git
diff --git a/framework/3rd/moon b/framework/3rd/moon
deleted file mode 160000
index 7f1f94b..0000000
--- a/framework/3rd/moon
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit 7f1f94b66762df19570505219c9031f9a411c649
diff --git a/framework/lualib/3rd/misc/isa.lua b/framework/lualib/3rd/misc/isa.lua
new file mode 100644
index 0000000..9d5b2a5
--- /dev/null
+++ b/framework/lualib/3rd/misc/isa.lua
@@ -0,0 +1,144 @@
+-- https://github.com/mah0x211/lua-isa
+
+-- constants
+local INF_POS = math.huge;
+local INF_NEG = -INF_POS;
+local type = type;
+local floor = math.floor;
+
+-- type
+local function isNil(arg)
+    return type(arg) == 'nil';
+end
+
+local function isBoolean(arg)
+    return type(arg) == 'boolean';
+end
+
+local function isString(arg)
+    return type(arg) == 'string';
+end
+
+local function isNumber(arg)
+    return type(arg) == 'number';
+end
+
+local function isFunction(arg)
+    return type(arg) == 'function';
+end
+
+local function isTable(arg)
+    return type(arg) == 'table';
+end
+
+local function isThread(arg)
+    return type(arg) == 'thread';
+end
+
+local function isUserdata(arg)
+    return type(arg) == 'userdata';
+end
+
+-- boolean
+local function isTrue(arg)
+    return arg == true;
+end
+
+local function isFalse(arg)
+    return arg == false;
+end
+
+-- None
+local function isNone(arg)
+    return arg == nil or arg == false or arg == 0 or arg == '' or arg ~= arg;
+end
+
+-- arithmetic
+local function isNaN(arg)
+    return arg ~= arg;
+end
+
+-- integer
+local function isFinite(arg)
+    return type(arg) == 'number' and (arg < INF_POS and arg > INF_NEG);
+end
+
+local function isInt(arg)
+    return isFinite(arg) and rawequal(floor(arg), arg);
+end
+
+local function isInt8(arg)
+    return isInt(arg) and arg >= -128 and arg <= 127;
+end
+
+local function isInt16(arg)
+    return isInt(arg) and arg >= -32768 and arg <= 32767;
+end
+
+local function isInt32(arg)
+    return isInt(arg) and arg >= -2147483648 and arg <= 2147483647;
+end
+
+-- unsigned integer
+local function isUnsigned(arg)
+    return type(arg) == 'number' and (arg < INF_POS and arg >= 0);
+end
+
+local function isUInt(arg)
+    return isUnsigned(arg) and rawequal(floor(arg), arg);
+end
+
+local function isUInt8(arg)
+    return isUInt(arg) and arg <= 255;
+end
+
+local function isUInt16(arg)
+    return isUInt(arg) and arg <= 65535;
+end
+
+local function isUInt32(arg)
+    return isUInt(arg) and arg <= 4294967295;
+end
+
+local EXPORTS = {};
+
+for k, v in pairs({
+    -- type
+    ['Nil'] = isNil,
+    ['Boolean'] = isBoolean,
+    ['String'] = isString,
+    ['Number'] = isNumber,
+    ['Function'] = isFunction,
+    ['Table'] = isTable,
+    ['Thread'] = isThread,
+    ['Userdata'] = isUserdata,
+
+    -- boolean
+    ['True'] = isTrue,
+    ['False'] = isFalse,
+
+    -- None: nil | false | 0 | '' | nan
+    ['None'] = isNone,
+
+    -- arithmetic
+    -- NaN
+    ['NaN'] = isNaN,
+    ['Finite'] = isFinite,
+
+    -- integer
+    ['Int'] = isInt,
+    ['Int8'] = isInt8,
+    ['Int16'] = isInt16,
+    ['Int32'] = isInt32,
+
+    -- unsigned integer
+    ['Unsigned'] = isUnsigned,
+    ['UInt'] = isUInt,
+    ['UInt8'] = isUInt8,
+    ['UInt16'] = isUInt16,
+    ['UInt32'] = isUInt32,
+}) do
+    EXPORTS[k], EXPORTS[k:lower()] = v, v;
+end
+
+return EXPORTS;
diff --git a/framework/lualib/3rd/misc/loadchunk.lua b/framework/lualib/3rd/misc/loadchunk.lua
new file mode 100644
index 0000000..73fd8a0
--- /dev/null
+++ b/framework/lualib/3rd/misc/loadchunk.lua
@@ -0,0 +1,47 @@
+-- https://github.com/mah0x211/lua-loadchunk
+local load = load
+local loadstring = loadstring
+local loadfile = loadfile
+local setfenv = setfenv
+--- constants
+local LUA_VERSION = tonumber(string.match(_VERSION, 'Lua (.+)$'))
+
+--- evalstr
+-- @param src
+-- @param env
+-- @param ident
+-- @return fn
+-- @return err
+local function evalstr(src, env, ident)
+    if LUA_VERSION > 5.1 then
+        return load(src, ident, nil, env)
+    else
+        local fn, err = loadstring(src, ident)
+        if not err and env ~= nil then
+            setfenv(fn, env)
+        end
+        return fn, err
+    end
+end
+
+--- evalfile
+-- @param file
+-- @param env
+-- @return fn
+-- @return err
+local function evalfile(file, env)
+    if LUA_VERSION > 5.1 then
+        return loadfile(file, nil, env)
+    else
+        local fn, err = loadfile(file)
+        if not err and env ~= nil then
+            setfenv(fn, env)
+        end
+        return fn, err
+    end
+end
+
+return {
+    string = evalstr,
+    file = evalfile,
+}