GitHub has expanded its commit signing feature to include bots by default, ensuring that both human and automated contributions can be verified as authentic. Commit signing uses cryptographic methods to confirm the integrity and authorship of a commit, with verified commits marked by a green checkmark on GitHub. This feature, which has supported human-authored commits for some time, is now crucial for integrating bots like Dependabot into workflows, enhancing the security of software supply chains. Commit signing was first introduced in Git version 1.7.9 in January 2012, with GitHub implementing support in April 2016, as part of their ongoing efforts to secure software development and collaboration.