diff --git a/.editorconfig b/.editorconfig
new file mode 100644
index 0000000..a0ad5ed
--- /dev/null
+++ b/.editorconfig
@@ -0,0 +1,19 @@
+root = true
+
+[*]
+indent_style = space
+indent_size = 2
+trim_trailing_whitespace = true
+insert_final_newline = true
+charset = utf-8
+end_of_line = lf
+
+[*.md]
+indent_size = 4
+
+[Makefile]
+indent_style = tab
+
+[*.lua]
+indent_size = 4
+
diff --git a/.github/workflows/pr_check.yaml b/.github/workflows/pr_check.yaml
new file mode 100644
index 0000000..1792cd6
--- /dev/null
+++ b/.github/workflows/pr_check.yaml
@@ -0,0 +1,15 @@
+on:
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Lua Linting
+        uses: lunarmodules/luacheck@v1
+        with:
+          args: ./src
+
diff --git a/.luacheckrc b/.luacheckrc
new file mode 100644
index 0000000..206ca97
--- /dev/null
+++ b/.luacheckrc
@@ -0,0 +1,67 @@
+std = {
+  globals = {
+    "love",
+    "G",
+    "localize",
+    "generate_card_ui",
+    "UIBox_button",
+    "Moveable",
+    "Event",
+    "card_generate_uibox_ability_table",
+    "Card",
+    "ease_discard",
+    "ease_hands_played",
+    "ease_dollars",
+    "Back",
+    "Game",
+    "mods",
+    "LOGGERS",
+    "START_TIME",
+    "inject",
+    "injectHead",
+    "injectTail",
+    "os",
+    "UIBox",
+    "is_loaded",
+    "buildPaths",
+    "current_game_code",
+    "escaped_function_body",
+    "escaped_modified_function_code",
+    "original_testFunction",
+    "testFunction",
+    "error",
+    "select",
+    "rawget",
+    "loc_parse_string",
+    "create_playing_card",
+    "playing_card_joker_effects"
+  },
+  read_globals = {
+    "string",
+    "math",
+    "pairs",
+    "ipairs",
+    "table",
+    "tonumber",
+    "tostring",
+    "setmetatable",
+    "getmetatable",
+    "next",
+    "type",
+    "assert",
+    "pcall",
+    "require",
+    "pseudorandom",
+    "pseudorandom_element",
+    "pseudoseed",
+    "create_option_cycle",
+    "create_badge",
+    "create_UIBox_generic_options",
+    "create_tabs",
+    "setfenv",
+    "load",
+    "getfenv"
+  }
+}
+
+unused_args = false
diff --git a/src/assets.lua b/src/assets.lua
index 92bc82c..1327cff 100644
--- a/src/assets.lua
+++ b/src/assets.lua
@@ -23,7 +23,7 @@ local function getAtli(modId, textureScaling)
     local atliPath = "mods/" .. modId .. "/assets/textures/"..textureScaling.."x"
     local dir = love.filesystem.getDirectoryItems(atliPath)
     for i, path in ipairs(dir) do
-        local filename, extension = string.match(path, "([^/]+)%.(.+)$")
+        local filename, _ = string.match(path, "([^/]+)%.(.+)$")
         local name = modId .. "_" .. filename
         local image = love.graphics.newImage(atliPath.."/"..path, {mipmaps = true, dpiscale = textureScaling})
         local assetType = assetTypes[string.match(filename, "(.+)_")]
diff --git a/src/balamod.lua b/src/balamod.lua
index 6412ad2..ce1d640 100644
--- a/src/balamod.lua
+++ b/src/balamod.lua
@@ -7,7 +7,7 @@ local utils = require('utils')
 local tar = require('tar')
 local https = require('https')
 
-logger = logging.getLogger('balamod')
+local logger = logging.getLogger('balamod')
 mods = {}
 local apis = {
     logging = logging,
@@ -68,8 +68,7 @@ end
 
 local function request(url)
     logger:debug('Request made with url: ', url)
-    local code
-    local response
+    local code, response, headers
     code, response, headers = https.request(url, {headers = {['User-Agent'] = 'Balamod-Client'}})
     if (code == 301 or code == 302) and headers.location then
         -- follow redirects if necessary
@@ -764,7 +763,7 @@ mods["dev_console"] = {
                         else
                             G.consumeables:emplace(c1)
                         end
-                        
+
                         G.CONTROLLER:save_cardarea_focus('jokers')
                         G.CONTROLLER:recall_cardarea_focus('jokers')
                         return true
@@ -1235,4 +1234,4 @@ return {
     toggleMod = toggleMod,
     sortMods = sortMods,
     callModCallbacksIfExists = callModCallbacksIfExists,
-}
\ No newline at end of file
+}
diff --git a/src/balamod_back.lua b/src/balamod_back.lua
index c0be040..ac4dd3f 100644
--- a/src/balamod_back.lua
+++ b/src/balamod_back.lua
@@ -1,8 +1,8 @@
-local back_apply_to_run = back_apply_to_run or Back.apply_to_run
+local back_apply_to_run = back_apply_to_run or Back.apply_to_run  -- luacheck: ignore
 
 function Back:apply_to_run()
     if self.effect.config.cards then
         G.GAME.starting_params.cards = self.effect.config.cards
     end
-    back_apply_to_run(self)
-end
\ No newline at end of file
+    back_apply_to_run(self)  -- luacheck: ignore
+end
diff --git a/src/balamod_card.lua b/src/balamod_card.lua
index 48e37b4..218f8bc 100644
--- a/src/balamod_card.lua
+++ b/src/balamod_card.lua
@@ -1,23 +1,22 @@
 local joker = require('joker')
 local seal = require('seal')
-local assets = require('assets')
 local logging = require('logging')
-local logger = logging.getLogger('card')
+local logger = logging.getLogger('card')  -- luacheck: ignore
 local consumable = require("consumable")
 
 -- references to original patched functions
-local card_calculate_joker = card_calculate_joker or Card.calculate_joker
-local card_generate_uibox_ability_table = card_generate_uibox_ability_table or Card.generate_UIBox_ability_table
-local card_set_sprites = card_set_sprites or Card.set_sprites
-local card_calculate_seal = card_calculate_seal or Card.calculate_seal
-local card_get_end_of_round_effect = card_get_end_of_round_effect or Card.get_end_of_round_effect
-local card_eval_card = eval_card
-local card_open = card_open or Card.open
-local card_calculate_dollar_bonus = Card.calculate_dollar_bonus
-local card_add_to_deck = Card.add_to_deck
-local card_remove_from_deck = Card.remove_from_deck
-local card_use_consumeable = Card.use_consumeable
-local card_can_use_consumeable = Card.can_use_consumeable
+local card_calculate_joker = card_calculate_joker or Card.calculate_joker  -- luacheck: ignore
+local card_generate_uibox_ability_table = card_generate_uibox_ability_table or Card.generate_UIBox_ability_table  -- luacheck: ignore
+local card_set_sprites = card_set_sprites or Card.set_sprites  -- luacheck: ignore
+local card_calculate_seal = card_calculate_seal or Card.calculate_seal  -- luacheck: ignore
+local card_get_end_of_round_effect = card_get_end_of_round_effect or Card.get_end_of_round_effect  -- luacheck: ignore
+local card_eval_card = eval_card  -- luacheck: ignore
+local card_open = card_open or Card.open  -- luacheck: ignore
+local card_calculate_dollar_bonus = Card.calculate_dollar_bonus  -- luacheck: ignore
+local card_add_to_deck = Card.add_to_deck  -- luacheck: ignore
+local card_remove_from_deck = Card.remove_from_deck  -- luacheck: ignore
+local card_use_consumeable = Card.use_consumeable  -- luacheck: ignore
+local card_can_use_consumeable = Card.can_use_consumeable  -- luacheck: ignore
 
 
 function Card:calculate_joker(context)
diff --git a/src/balamod_game.lua b/src/balamod_game.lua
index f390718..7f97ab5 100644
--- a/src/balamod_game.lua
+++ b/src/balamod_game.lua
@@ -3,8 +3,8 @@ local logging = require('logging')
 local logger = logging.getLogger('game')
 local balamod = require('balamod')
 
-local game_set_render_settings = game_set_render_settings or Game.set_render_settings
-local game_start_run = game_start_run or Game.start_run
+local game_set_render_settings = game_set_render_settings or Game.set_render_settings  -- luacheck: ignore
+local game_start_run = game_start_run or Game.start_run  -- luacheck: ignore
 
 function Game:set_render_settings()
     game_set_render_settings(self)
diff --git a/src/balamod_love.lua b/src/balamod_love.lua
index 7b40a3c..c20e4e8 100644
--- a/src/balamod_love.lua
+++ b/src/balamod_love.lua
@@ -6,8 +6,8 @@ local game_love_mousepressed = love.mousepressed
 local game_love_mousereleased = love.mousereleased
 local game_love_mousemoved = love.mousemoved
 local game_love_wheelmoved = love.wheelmoved
-local game_love_textinput = love.textinput
-local game_love_resize = love.resize
+local game_love_textinput = love.textinput  -- luacheck: ignore
+local game_love_resize = love.resize  -- luacheck: ignore
 local game_love_quit = love.quit
 local game_love_load = love.load
 local game_love_gamepad_pressed = love.gamepadpressed
@@ -21,6 +21,8 @@ local utils = require('utils')
 local logger = logging.getLogger('love')
 local localization = require('localization')
 
+local status, message
+
 function love.load(args)
     local status, message = pcall(balamod.callModCallbacksIfExists, balamod.mods, "on_game_load", true, args)
     if not status then
@@ -69,7 +71,7 @@ function love.update(dt)
         end
     end
 
-    local status, result = pcall(balamod.callModCallbacksIfExists, balamod.mods, "on_post_update", false, dt)
+    status, result = pcall(balamod.callModCallbacksIfExists, balamod.mods, "on_post_update", false, dt)
     if not status then
         logger:warn("Failed on_post_update for mods: ", result)
     end
@@ -227,7 +229,14 @@ end
 
 function love.joystickaxis(joystick, axis, value)
     local cancel_event = false
-    local status, result = pcall(balamod.callModCallbacksIfExists, balamod.mods, "on_joystick_axis", false, joystick, axis, value)
+    local status, result = pcall(
+        balamod.callModCallbacksIfExists,
+        balamod.mods, "on_joystick_axis",
+        false,
+        joystick,
+        axis,
+        value
+    )
     if not status then
         logger:warn("Failed on_joystick_axis for mods: ", result)
     else
diff --git a/src/balamod_misc_functions.lua b/src/balamod_misc_functions.lua
index a4df03d..3ad1d40 100644
--- a/src/balamod_misc_functions.lua
+++ b/src/balamod_misc_functions.lua
@@ -1,9 +1,8 @@
 local localization = require('localization')
 local consumable = require("consumable")
-local utils = require("utils")
 
-local misc_functions_init_localization = misc_functions_init_localization or init_localization
-local misc_generate_card_ui = generate_card_ui
+local misc_functions_init_localization = misc_functions_init_localization or init_localization  -- luacheck: ignore
+local misc_generate_card_ui = generate_card_ui  -- luacheck: ignore
 
 function init_localization()
     localization.inject()
diff --git a/src/challenge.lua b/src/challenge.lua
index bb9f8af..83b4d62 100644
--- a/src/challenge.lua
+++ b/src/challenge.lua
@@ -1,10 +1,9 @@
 local _MODULE = {}
 _MODULE._VERSION = "1.0.0"
 
-local balamod = require("balamod")
 local logging = require("logging")
 local logger = logging.getLogger("challenge")
-local utils = require("utils")
+-- local utils = require("utils")
 _MODULE.logger = logger
 local challenges = {}
 
@@ -39,23 +38,23 @@ local allModifiers = {
     "hand_size",
 }
 
-local function isIdInTable(id, theTable)
-    for _, value in ipairs(theTable) do
-        if value.id == id then
-            return true
-        end
-    end
-    return false
-end
+-- local function isIdInTable(id, theTable)
+--     for _, value in ipairs(theTable) do
+--         if value.id == id then
+--             return true
+--         end
+--     end
+--     return false
+-- end
 
-local function isValueForIdInTable(id, value, theTable)
-    for _, v in ipairs(theTable) do
-        if v.id == id and v.value == value then
-            return true
-        end
-    end
-    return false
-end
+-- local function isValueForIdInTable(id, value, theTable)
+--     for _, v in ipairs(theTable) do
+--         if v.id == id and v.value == value then
+--             return true
+--         end
+--     end
+--     return false
+-- end
 
 local function validateChallengeId(challengeId)
     if challengeId == nil then
diff --git a/src/deck.lua b/src/deck.lua
index 89b0366..5b88356 100644
--- a/src/deck.lua
+++ b/src/deck.lua
@@ -2,7 +2,7 @@
 
 local utils = require("utils")
 local logging = require("logging")
-local logger = logging.getLogger("deck")
+local logger = logging.getLogger("deck")  -- luacheck: ignore
 local math = require("math")
 
 
@@ -11,7 +11,7 @@ _MODULE._VERSION = "1.0.0"
 local decks = {}
 local GAME_BACKS = utils.copyTable(G.P_CENTER_POOLS.Back, true) -- copy the original table
 
-local function getNextOrder()
+local function getNextOrder()  -- luacheck: ignore
     local latestOrder = utils.reduce(
         G.P_CENTER_POOLS.Back,
         function(acc, deck)
@@ -24,7 +24,7 @@ end
 
 local function computeDeckOrders()
     local latestOrder = utils.reduce(
-        GAME_BACKS
+        GAME_BACKS,
         function(acc, deck)
             return math.max(acc, deck.order or 1)
         end,
@@ -41,7 +41,12 @@ local function add(deck_id, deck)
     computeDeckOrders()
     G.P_CENTERS[deck_id] = decks[deck_id]
     table.insert(G.P_CENTER_POOLS.Back, deck)
-    table.sort(self.P_CENTER_POOLS["Back"], function (a, b) return (a.order - (a.unlocked and 100 or 0)) < (b.order - (b.unlocked and 100 or 0)) end)
+    table.sort(
+        self.P_CENTER_POOLS["Back"],
+        function (a, b)
+            return (a.order - (a.unlocked and 100 or 0)) < (b.order - (b.unlocked and 100 or 0))
+        end
+    )
 end
 
 local function remove(deck_id)
diff --git a/src/joker.lua b/src/joker.lua
index 1eb7581..965c164 100644
--- a/src/joker.lua
+++ b/src/joker.lua
@@ -1,4 +1,5 @@
-local balamod = require('balamod')
+local logging = require('logging')
+local logger = logging.getLogger('jokerAPI')
 
 local joker = {}
 joker._VERSION = "0.9.0"
@@ -10,13 +11,13 @@ joker.removeFromDeckEffects = {}
 joker.loc_vars = {}
 
 local function add_joker(args)
-    if not args.mod_id then logger:error("jokerAPI: mod_id REQUIRED when adding a joker"); return; end
+    if not args.mod_id then logger:error("mod_id REQUIRED when adding a joker"); return; end
     local id = args.id or "j_Joker_Placeholder" .. #G.P_CENTER_POOLS["Joker"] + 1
     local name = args.name or "Joker Placeholder"
     local calculate_joker_effect = args.calculate_joker_effect or function(_) end
     local order = #G.P_CENTER_POOLS["Joker"] + 1
-    local unlocked = nil
-    local discovered = nil
+    local unlocked = nil  -- luacheck: ignore
+    local discovered = nil  -- luacheck: ignore
     if args.unlocked ~= nil then
         unlocked = args.unlocked
     else
@@ -29,7 +30,7 @@ local function add_joker(args)
     end
     local cost = args.cost or 4
     local pos = {x=0, y=0}
-    local effect = args.effect or ""
+    local effect = args.effect or ""  -- luacheck: ignore
     local config = args.config or {}
     local desc = args.desc or {"Placeholder"}
     local rarity = args.rarity or 1
@@ -81,7 +82,14 @@ local function add_joker(args)
     G.P_CENTERS[id] = newJoker
 
     --add name + description to the localization object
-    local newJokerText = {name=name, text=desc, unlock=unlock_condition_desc, text_parsed={}, name_parsed={}, unlock_parsed={}}
+    local newJokerText = {
+        name=name,
+        text=desc,
+        unlock=unlock_condition_desc,
+        text_parsed={},
+        name_parsed={},
+        unlock_parsed={}
+    }
     for _, line in ipairs(desc) do
         newJokerText.text_parsed[#newJokerText.text_parsed+1] = loc_parse_string(line)
     end
@@ -131,4 +139,4 @@ local _MODULE = joker
 _MODULE.add = add_joker
 _MODULE.remove = remove_joker
 
-return _MODULE
\ No newline at end of file
+return _MODULE
diff --git a/src/logging.lua b/src/logging.lua
index 85b3d4e..234bfdc 100644
--- a/src/logging.lua
+++ b/src/logging.lua
@@ -10,6 +10,28 @@ local _MODULE = {
     LOGGERS = LOGGERS,
 }
 
+local function addZeroForLessThan10(number)
+    if(number < 10) then
+        return 0 .. number
+    else
+        return number
+    end
+end
+
+local function generateDateTime(start)
+    -- start is now in ms
+    -- need to round to seconds for an accurate date/time
+    start = math.floor(start or socket.gettime())
+    local dateTimeTable = os.date('*t', start)
+    local dateTime = dateTimeTable.year .. "-"
+            .. addZeroForLessThan10(dateTimeTable.month) .. "-"
+            .. addZeroForLessThan10(dateTimeTable.day) .. "-"
+            .. addZeroForLessThan10(dateTimeTable.hour) .. "-"
+            .. addZeroForLessThan10(dateTimeTable.min) .. "-"
+            .. addZeroForLessThan10(dateTimeTable.sec)
+    return dateTime
+end
+
 local function createLogger(name, lvl)
     local log_levels = {
         TRACE = 10,
@@ -40,14 +62,20 @@ local function createLogger(name, lvl)
                 text=text,
                 time=socket.gettime(),
                 name=self.name,
-                formatted=function(self, dump)
-                    if self.level == "PRINT" and not dump then
-                        return self.text
+                formatted=function(msg, dump)
+                    if msg.level == "PRINT" and not dump then
+                        return msg.text
                     end
                     if dump then
-                        return string.format("%s [%s] - %s :: %s", generateDateTime(self.time), self.name, self.level, self.text)
+                        return string.format(
+                            "%s [%s] - %s :: %s",
+                            generateDateTime(msg.time),
+                            msg.name,
+                            msg.level,
+                            msg.text
+                        )
                     end
-                    return string.format("[%s] - %s :: %s", self.name, self.level, self.text)
+                    return string.format("[%s] - %s :: %s", msg.name, msg.level, msg.text)
                 end,
             }
             table.insert(self.messages, message)
@@ -96,29 +124,7 @@ local function getAllMessages()
     return messages
 end
 
-function generateDateTime(start)
-    -- start is now in ms
-    -- need to round to seconds for an accurate date/time
-    start = math.floor(start or socket.gettime())
-    local dateTimeTable = os.date('*t', start)
-    local dateTime = dateTimeTable.year .. "-"
-            .. addZeroForLessThan10(dateTimeTable.month) .. "-"
-            .. addZeroForLessThan10(dateTimeTable.day) .. "-"
-            .. addZeroForLessThan10(dateTimeTable.hour) .. "-"
-            .. addZeroForLessThan10(dateTimeTable.min) .. "-"
-            .. addZeroForLessThan10(dateTimeTable.sec)
-    return dateTime
-end
-
-function addZeroForLessThan10(number)
-    if(number < 10) then
-        return 0 .. number
-    else
-        return number
-    end
-end
-
-function saveLogs()
+local function saveLogs()
     local filename = "logs/" .. generateDateTime() .. ".log"
     love.filesystem.write(filename, "")
     for _, message in ipairs(getAllMessages()) do
diff --git a/src/mod_menu.lua b/src/mod_menu.lua
index f5b7430..cb74a8b 100644
--- a/src/mod_menu.lua
+++ b/src/mod_menu.lua
@@ -1,6 +1,9 @@
 local balamod = require('balamod')
 local utils = require('utils')
 
+local mods_collection = {}
+local mods_collection_size = 0
+
 G.FUNCS.open_balamod_website = function(e)
     love.system.openURL('https://balamod.github.io/')
 end
@@ -45,7 +48,6 @@ G.FUNCS.install_mod = function(e)
 end
 
 G.UIDEF.mod_description = function(e)
-    local text_scale = 0.75
     local status_btn_id = 's_btn_' .. e.config.id
     local menu_btn_id = 'm_btn_' .. e.config.id
     local dl_up_btn_id = 'd_btn_' .. e.config.id
@@ -65,8 +67,12 @@ G.UIDEF.mod_description = function(e)
     local status_colour = mod.enabled and G.C.GREEN or G.C.RED
     local need_update = mod.needUpdate
     local new_version = need_update and 'New ' .. mod.newVersion or version
-    local show_download_btn = not mod_present or need_update
-    balamod.logger:debug('Mod: ', mod.name, ' present: ', mod_present, ' need update: ', need_update, ' new version: ', new_version)
+    balamod.logger:debug(
+        'Mod: ', mod.name,
+        ' present: ', mod_present,
+        ' need update: ', need_update,
+        ' new version: ', new_version
+    )
     local mod_description_text = {}
     for _, v in ipairs(mod.description) do
         mod_description_text[#mod_description_text + 1] = {
@@ -193,7 +199,7 @@ G.FUNCS.change_mod_description = function(e)
     end
 end
 
-G.UIDEF.mod_list_page = function(_page)
+G.UIDEF.mod_list_page = function(_page) -- luacheck: ignore
     local snapped = false
     local mod_list = {}
     local i = 0
@@ -241,16 +247,16 @@ G.FUNCS.change_mod_list_page = function(args)
     end
 end
 
-mods_collection = {}
-mods_collection_size = 0
-
 local function create_mod_tab_definition()
     G.MOD_PAGE_SIZE = 7
     mods_collection = {}
     mods_collection_size = 0
-    logger:debug('Mods collection generation with mods', utils.map(balamod.mods, function(mod) return mod.id end))
+    balamod.logger:debug(
+        'Mods collection generation with mods',
+        utils.map(balamod.mods, function(mod) return mod.id end)
+    )
     for mod_id, mod in pairs(balamod.mods) do
-        logger:trace('Trying to add mod ', mod_id, ' to collection')
+        balamod.logger:trace('Trying to add mod ', mod_id, ' to collection')
         if not mods_collection[mod_id] then
             mods_collection[mod_id] = mod
             mods_collection_size = mods_collection_size + 1
@@ -258,7 +264,7 @@ local function create_mod_tab_definition()
             balamod.logger:warn('Mod ' .. mod.name .. ' already in collection')
         end
     end
-    logger:debug('Mods collection before repoMods additions', utils.keys(mods_collection))
+    balamod.logger:debug('Mods collection before repoMods additions', utils.keys(mods_collection))
     for index, mod in ipairs(balamod.getRepoMods()) do
         local cur_mod = mods_collection[mod.id]
         if cur_mod == nil then
diff --git a/src/patches.lua b/src/patches.lua
index f6d7e87..e579355 100644
--- a/src/patches.lua
+++ b/src/patches.lua
@@ -14,15 +14,17 @@ for _, modFolder in ipairs(modFolders) do
         end
     end
 end
-local status, sortedMods = pcall(balamod.sortMods, balamod.mods)
+local status, sortedMods, message
+
+status, sortedMods = pcall(balamod.sortMods, balamod.mods)
 if not status then
     logger:warn("Failed to sort mods: ", sortedMods)
 else
     balamod.mods = sortedMods
 end
 
-logger:info("Mods: ", utils.keys(mods))
-local status, message = pcall(balamod.callModCallbacksIfExists, balamod.mods, "on_pre_load", true)
+logger:info("Mods: ", utils.keys(balamod.mods))
+status, message = pcall(balamod.callModCallbacksIfExists, balamod.mods, "on_pre_load", true)
 if not status then
     logger:warn("Failed to preload mods: ", message)
 end
diff --git a/src/platform.lua b/src/platform.lua
index d92dadd..02d6e60 100644
--- a/src/platform.lua
+++ b/src/platform.lua
@@ -1,4 +1,5 @@
-return {
+local _MODULE = {
+    _VERSION = "0.1.0",
     is_mac = love.system.getOS() == "OS X",
     is_windows = love.system.getOS() == "Windows",
     is_linux = love.system.getOS() == "Linux",
@@ -7,3 +8,35 @@ return {
     is_android = love.system.getOS() == "Android",
     is_ios = love.system.getOS() == "iOS",
 }
+
+--- Strip the path off a path+filename.
+-- @param pathname string: A path+name, such as "/a/b/c"
+-- or "\a\b\c".
+-- @return string: The filename without its path, such as "c".
+local function baseName(pathname)
+    assert(type(pathname) == "string")
+
+    local base = pathname:match(".*[/\\]([^/\\]*)")
+    return base or pathname
+ end
+
+ --- Strip the name off a path+filename.
+ -- @param pathname string: A path+name, such as "/a/b/c".
+ -- @return string: The filename without its path, such as "/a/b/".
+ -- For entries such as "/a/b/", "/a/" is returned. If there are
+ -- no directory separators in input, "" is returned.
+ local function dirName(pathname)
+    assert(type(pathname) == "string")
+
+    return (pathname:gsub("/*$", ""):match("(.*/)[^/]*")) or ""
+ end
+
+ local function stripBaseDir(pathname)
+    return pathname:gsub("^[^/]*/", "")
+ end
+
+_MODULE.baseName = baseName
+_MODULE.dirName = dirName
+_MODULE.stripBaseDir = stripBaseDir
+
+return _MODULE
diff --git a/src/seal.lua b/src/seal.lua
index 1d76c70..98cd096 100644
--- a/src/seal.lua
+++ b/src/seal.lua
@@ -1,4 +1,3 @@
-local balamod = require('balamod')
 local logging = require('logging')
 local logger = logging.getLogger("seal")
 local seal = {}
@@ -6,7 +5,6 @@ seal._VERSION = "0.1.0"
 seal.seals = {}
 seal.effects = {}
 seal.timings = {}
-local first_mod = true
 
 local function setData(args)
     local generate_card_ui_ref = generate_card_ui
@@ -86,7 +84,7 @@ local function setData(args)
                         }
                         full_UI_table.name = full_UI_table.name[1]
                     end
-                elseif card_type == 'Booster' then
+                elseif card_type == 'Booster' then -- luacheck: ignore
 
                 else
                     full_UI_table.name = localize {
@@ -207,7 +205,7 @@ local function setData(args)
                         vars = {specific_vars.bonus_chips}
                     }
                 end
-            elseif _c.set == 'Enhanced' then 
+            elseif _c.set == 'Enhanced' then
                 if specific_vars and _c.name ~= 'Stone Card' and specific_vars.nominal_chips then
                     localize{type = 'other', key = 'card_chips', nodes = desc_nodes, vars = {specific_vars.nominal_chips}}
                 end
@@ -315,7 +313,7 @@ local function setData(args)
                     }
                 end
             end
-            if first_pass and not (_c.set == 'Edition') and badges then
+            if first_pass and (_c.set ~= 'Edition') and badges then
                 for k, v in ipairs(badges) do
                     if v == 'foil' then
                         info_queue[#info_queue + 1] = G.P_CENTERS['e_foil']
@@ -364,7 +362,7 @@ local function setData(args)
     end
 end
 
--- Provided args: 
+-- Provided args:
 -- mod_id, color, description
 -- id = Seal name with no spaces,
 -- label = Seal name as you want it to appear in game,
diff --git a/src/tar.lua b/src/tar.lua
index dc2b1c9..bd396e0 100644
--- a/src/tar.lua
+++ b/src/tar.lua
@@ -10,34 +10,6 @@ local math = require('math')
 
 local tar = {}
 local blocksize = 512
-local byte = string.byte
-
-
---- Strip the path off a path+filename.
--- @param pathname string: A path+name, such as "/a/b/c"
--- or "\a\b\c".
--- @return string: The filename without its path, such as "c".
-local function base_name(pathname)
-   assert(type(pathname) == "string")
-
-   local base = pathname:match(".*[/\\]([^/\\]*)")
-   return base or pathname
-end
-
---- Strip the name off a path+filename.
--- @param pathname string: A path+name, such as "/a/b/c".
--- @return string: The filename without its path, such as "/a/b/".
--- For entries such as "/a/b/", "/a/" is returned. If there are
--- no directory separators in input, "" is returned.
-local function dir_name(pathname)
-   assert(type(pathname) == "string")
-
-   return (pathname:gsub("/*$", ""):match("(.*/)[^/]*")) or ""
-end
-
-local function strip_base_dir(pathname)
-   return pathname:gsub("^[^/]*/", "")
-end
 
 -- trim5 from http://lua-users.org/wiki/StringTrim
 local function trim(s)
@@ -123,7 +95,7 @@ local function read_header_block(block)
     if header.version ~= "00" and header.version ~= " \0" then
         return false, "Unknown version "..header.version
     end
-    if not checksum_header(block) == header.chksum then
+    if checksum_header(block) ~= header.chksum then
         return false, "Failed header checksum"
     end
     return header
@@ -151,7 +123,7 @@ function tar.unpack(data)
     local longName = nil
     local longLinkName = nil
     local unpackedData = {}
-    local block = ""
+    local block
     repeat
         -- iterate by blocks of 512 bytes over the data
         block = readBlock(ptr, i, blocksize)
diff --git a/src/utils.lua b/src/utils.lua
index e652db6..88fc0af 100644
--- a/src/utils.lua
+++ b/src/utils.lua
@@ -212,8 +212,8 @@ local function mergeTables(table1, table2, logger)
         if type(v) == "table" and type(result[k]) == "table" then
             -- both are tables so we recurse, but first, we need to check
             -- whether it's an "array" table or a "dict" table
-            local isDictTable = all(map(keys(result), function(k)
-                return type(k) ~= "number"
+            local isDictTable = all(map(keys(result), function(key)
+                return type(key) ~= "number"
             end))
             if isDictTable then
                 result[k] = mergeTables(result[k], v, logger)