diff --git a/lib/control-stage.lua b/lib/control-stage.lua
index c923e57..011be2d 100644
--- a/lib/control-stage.lua
+++ b/lib/control-stage.lua
@@ -11,7 +11,7 @@ require "compound-entities"
 ---@param entity LuaEntity
 ---@param sprite string
 ---@param time_to_live integer
----@param blink_interval integer
+---@param blink_interval integer?
 py.draw_error_sprite = function(entity, sprite, time_to_live, blink_interval)
     return rendering.draw_sprite {
         sprite = sprite,
diff --git a/lib/lib.lua b/lib/lib.lua
index 67ff638..e3fc65b 100644
--- a/lib/lib.lua
+++ b/lib/lib.lua
@@ -290,11 +290,11 @@ if settings.startup["pypp-no-globals"].value then
             if not declaredNames[n] then
                 if py.stage == "control" then
                     -- temp
-                    game.print(debug.traceback("attempt to write to undeclared global variable, please report it: " .. n, 2))
+                    game.print(debug.traceback("attempt to write to undeclared global variable, please report it\nIf this is intended, add it to the globals list in pypp/lib/lib.lua" .. n, 2))
                     -- end temp
                     -- error("attempt to write to undeclared variable: " .. n, 2)
                 end
-                log(debug.traceback("INFO: creating a new global variable: " .. n, 2))
+                log(debug.traceback("INFO: creating a new global variable\nIf this is intended, add it to the globals list in pypp/lib/lib.lua" .. n, 2))
             end
             rawset(t, n, v) -- do the actual set
         end,
diff --git a/lib/metas/recipe.lua b/lib/metas/recipe.lua
index 6891f7e..a91e3e2 100644
--- a/lib/metas/recipe.lua
+++ b/lib/metas/recipe.lua
@@ -18,7 +18,7 @@ local table_insert = table.insert
 ---@field public add_ingredient_amount fun(self: data.RecipePrototype, ingredient_name: string, increase: number): data.RecipePrototype
 ---@field public set_result_amount fun(self: data.RecipePrototype, result_name: string, amount: number): data.RecipePrototype
 ---@field public set_ingredient_amount fun(self: data.RecipePrototype, ingredient_name: string, amount: number): data.RecipePrototype
----@field public get_main_product fun(self: data.RecipePrototype, allow_multi_product: bool?): LuaItemPrototype?|LuaFluidPrototype?
+---@field public get_main_product fun(self: data.RecipePrototype, allow_multi_product: boolean?): LuaItemPrototype?|LuaFluidPrototype?
 ---@field public get_icons fun(self: data.RecipePrototype): data.IconData
 
 local metas = {}
@@ -371,6 +371,7 @@ metas.get_main_product = function(self, allow_multi_product)
     else -- or only result
         _, result = next(self.results)
     end
+    --[[@cast result data.ItemProductPrototype|data.ResearchProgressProductPrototype]]
     -- Special modding funtimes case: invalid spec
     if not (result.type == "research-progress" and result.research_item or result.name) then return end
     if result.type ~= nil and (result.type ~= "item" and result.type ~= "fluid" and result.type ~= "research-progress") then return end
diff --git a/lib/metas/technology.lua b/lib/metas/technology.lua
index 154ad5a..adbd497 100644
--- a/lib/metas/technology.lua
+++ b/lib/metas/technology.lua
@@ -1,9 +1,9 @@
 ---@class data.TechnologyPrototype
 ---@field public standardize fun(): data.TechnologyPrototype
----@field public add_prereq fun(prereq_technology_name: string): data.TechnologyPrototype
----@field public remove_prereq fun(prereq_technology_name: string): data.TechnologyPrototype
----@field public remove_pack fun(science_pack_name: string): data.TechnologyPrototype
----@field public add_pack fun(science_pack_name: string): data.TechnologyPrototype
+---@field public add_prereq fun(self, prereq_technology_name: string): data.TechnologyPrototype
+---@field public remove_prereq fun(self, prereq_technology_name: string): data.TechnologyPrototype
+---@field public remove_pack fun(self, science_pack_name: string): data.TechnologyPrototype
+---@field public add_pack fun(self, science_pack_name: string): data.TechnologyPrototype
 ---@field dependencies string[]
 
 TECHNOLOGY = setmetatable(data.raw.technology, {