Lucas Valbuena
Developer & open source contributor building transparency in AI development
I'm Lucas Valbuena, known as x1xhlol in the developer community. I create tools and resources that make complex technologies more accessible.
My work on system-prompts-and-models-of-ai-tools has reached almost a million developers worldwide, documenting the internal workings of popular AI development tools. The project emerged from a belief in transparency and shared knowledge.
I focus on developer experience, open source contribution, and building systems that help others understand the tools they use every day.
Projects
Featured work
System Prompts & Models of AI Tools
A comprehensive collection documenting system prompts and internal configurations from leading AI development tools including v0, Cursor, Windsurf, and more. Used by developers worldwide to understand and leverage AI coding assistants.
ZeroLeaks
AI security platform that helps companies identify and fix exposed system prompts through expert prompt engineering analysis. Protects AI intellectual property and prevents competitive vulnerabilities with comprehensive security assessments.
Zero Calendar
Open-source AI-powered calendar with natural language interaction, Google Calendar integration, recurring events, timezone management, and customizable dark mode UI. Built for developers who want smart scheduling without complexity.
Technical expertise
Full-stack development with expertise in modern web technologies and AI systems
Frontend Development
Backend & APIs
DevOps & Tools
AI & Security
Let's work together
Open to new opportunities, collaborations, and conversations. Reach out through any of the channels below.