A deal between the government and the Greens to try and stop gas from being added to the electricity market’s capacity investment scheme has been seized on by the opposition as a harbinger of a Labor minority government.

In parliament on Wednesday, the government accepted a Greens amendment to an unrelated energy bill that mandates the capacity investment scheme, or CIS, has at least 23 gigawatts of wind and solar energy, and 9 gigawatts of clean storage.