As in title, if an item is empty ( get_undo_item() returns {}) any action that would normally be added to that item would be ignored and not added to any item.

I've been using the following commands to test:

local player = game.get_player(1)
local surface = game.get_surface(1)
surface.create ...

Alt and reverse can be changed during the selection process, so they probably won't be added as an event property. In either case, you want something like the original tapeline implementation which just appeared in the mod belt draw.

Fascinating, i like the implications. +1

Quorken wrote: Sun Feb 08, 2026 3:40 am Would this reset any machines with the now-locked recipe set?

I assume so, similar to how surface conditions lock recipes.

I think you can already do this via the on_research_finished event, and then setting recipe enabled=false .

Good Luck!


The point is to not need to run scripts like that, and having proper support for this 'feature' is always better than scripting it manually. Additionally, script locking ...

This is a bug.

viewtopic.php?t=131736

As in title, I would like an inverse to the 'unlock-recipe' technology research effect that instead locks the linked recipe. If implemented, this brings up the question of if it should lock the recipe if it was from multiple sources or was always available: I posit that it should lock the recipe ...

Please do :)

+1

+1

Currently, we only have flags for loading after another mod or whenever the load order feels like it. I'd like a way to specify loading before another mod. This fixes the issue of mods using 'zz' in their mod name just to load after other mods, but it requires those mods to use lazy dependencies to ...

curiosity wrote: Tue Jan 20, 2026 11:15 am trigger_target_mask?

No, they can still take proxy damage (fire, explosions)

As in title. If you have a crafting machine that has too many module slots (in this case 200) and the recipe is large enough to wrap to more than one line, it will no longer render on the GUI. The scrollbar for module slots will always exist. Note that if the GUI scale is decreased, such that the ...

As in title, assembling machines that have fixed_recipe specified on the prototype show up as able to craft other recipes in factoriopedia, both when viewing the entity and other recipes of the supported crafting category. This is greatly confusing to players when they attempt to use a building that ...

A flag or boolean on EntityWithHealthPrototype and its children that specifies that it is not possible of taking damage. Or, just flips LuaEntity.destructible automatically when it's created. On that note, is it possible to add a flag for each of the options on extended entity settings on the ...

Isnt that the idea of a filter to selectively pick items based on needs. If the needs of the spaceship change then the filter should also change.


Yes. Those needs are not always static. There's a reason you can just set filters and leave them be and not have to have a constant combinator hooked ...

Related/duplicate: viewtopic.php?t=132251

Hey, so is it me or is the Coal Power Plant wildly OP? I'm playing Py for the first time in a long time, and my buddies and I just unlocked Coal Power Plant with molten salt. If I'm doing my math right, it consumes something like 10MW worth of coal (or other burnables) and spits out around 100MW ...

Gotcha, sorry i had the wrong idea. +1

I believe that's because inserter's stacking abilities are derived from the currently researched stack size and the inserter's hand size. If it's holding 6 items and the stack size is 2 it will create stack sizes of 2. It doesn't make sense to set the stack size via script/on the inserters like you ...