【策划架构】Lua __metatable保护：裁决之杖插件防篡改设计

local attrs = {atk = 45}
local mt = {__index = attrs}
setmetatable(weapon, mt)
-- 插件侧一行篡改：
getmetatable(weapon).__index.atk = 9999
sendmsg(actor, 1, "攻击 " .. weapon.atk)   -- 显示 9999

local attrs = {atk = 45}
local mt = {__index = attrs, __metatable = "LOCKED"}
setmetatable(weapon, mt)
-- 插件侧尝试：
-- getmetatable(weapon) 得 "LOCKED" 而非真元表
-- setmetatable(weapon, {}) 抛保护错误
sendmsg(actor, 1, "攻击 " .. weapon.atk)   -- 稳定 45