Theodora Cheng enhanced the github/docs repository by updating the SMS-based two-factor authentication messaging to better inform users about security and deliverability risks. Focusing on documentation and technical writing, she used Markdown to clarify the dangers of SMS interception and phishing, while steering users toward more secure alternatives like TOTP applications and security keys. Her work aligned the product’s messaging with current security best practices, aiming to reduce user confusion and support safer multi-factor authentication adoption. The update was delivered as a single, well-documented feature, reflecting a focused and thoughtful approach to improving user guidance without introducing new bugs.