Construction robots automatically upgrade your buildings and modules to higher quality. Reimagination of https://mods.factorio.com/mod/AutoQualityUpgrades updated for factorio 2.1
Providing the player with new tools or adjusting the game interface, without fundamentally changing gameplay.
Reimagination of https://mods.factorio.com/mod/AutoQualityUpgrades updated for factorio 2.1
It'll also update epic>uncommon if your base doesn't have epic, but does have uncommon items.
By default, the mod automatically requests robots to upgrade the buildings.