My first Factorio mod and my first time releasing one — a small 2.0 utility. Drag-select an area of electric poles and the copper wires snap into a clean grid. Right-click drag to disconnect everything inside. Wires leaving the selection are preserved, so it's safe to use on a chunk of your base without breaking long-distance trunks.
Second screenshot is the actual before/after. Left half is the kind of tangled wiring you end up with after a lot of building and rebuilding — short crossings, redundant links, poles wired to the wrong neighbors. Right half is the same area after one drag with the tool. The substation columns on the borders kept all their external connections.
Under the hood it picks the shortest set of wires that keeps the network connected, then propagates parallel rows along consistent axes so you get a grid instead of a zig-zag. 26 languages, multiplayer-safe, no prototype changes — safe to add to or remove from existing saves.
This is also my first post on r/factorio, so if I got any of the etiquette wrong please let me know. The source isn't on GitHub yet — I might put it up later if there's interest. In the meantime, feedback of any kind is very welcome: the mod itself, the portal page, anything a first-time modder should know. Happy to learn.
Mod portal: https://mods.factorio.com/mod/wire-fix