SIGNAL Developer Mode is an enhancement to the SIGNAL conference experience, allowing attendees to engage more deeply with live coding demos and other resources within their terminal. It provides features such as live keynote mode, a demos section, automatic demo setup, and cheat mode, making it easier for builders to make the most of the virtual conference. To join Developer Mode, users must install the Twilio CLI plugin and log in using their Twilio account credentials. The plugin is available to any SIGNAL ticket holder. Once installed, users can access Developer Mode by running a specific command, and navigate through the interface using keyboard shortcuts. If issues arise, users can check for updates, report known issues on GitHub, or contact SIGNAL Concierge for support with a paid ticket.