Stellaris instant_build Command
This command causes all building (including ships, upgrades, stations, etc) to be instantly completed, rather than take time to build. The effects of this command apply to everything in the game (including AI) so it is recommended that you pause your game before using it.
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This is the only way this command can be executed, it will toggle instant building mode. If instant build mode is disabled, executing this command will enable it. If instant build mode is already enabled, this will disable it.