Twitter is tinkering with a potential new feature that could allow users to co-author tweets, the company confirmed this week after a developer uncovered the project.

The “Collaborations” initiative would make it easier for companies and influencers to post brand partnerships or other sponsored content. The feature would bring Twitter in line with rival social media platform Instagram, which has allowed users to co-author posts since last year.

App researcher Alessandro Paluzzi has been sharing regular updates on how the collaborations feature works since he first uncovered the project last December. Earlier this week, Paluzzi shared an apparently leaked Twitter dialogue box explaining how users can post a co-authored tweet.

In its current form, Twitter users would apparently be prompted to invite another user to co-author a post. If the other user accepts the request, the tweet will be posted with the names and avatars of both accounts on display.

“You can only invite people who have a public account and who follow you back,” Paluzzi wrote alongside a screenshot.