The Leanpub Podcast 🎙️ Feat. Daniel Vaughan, Author of Codex CLI: Agentic Engineering from First Principles
The conversation explores key ideas from the book, including prompting fundamentals, multi-agent orchestration, and integrating AI workflows into modern development pipelines like CI/CD.
Episode Details
In this episode of the Leanpub Podcast, Len Epp interviews Daniel Vaughan, author of Codex CLI: Agentic Engineering from First Principles. Dan shares his background and explains how “agentic AI” is transforming software engineering by enabling developers to collaborate with AI systems that can plan, execute, and iterate on complex tasks.
The conversation explores key ideas from the book, including prompting fundamentals, multi-agent orchestration, and integrating AI workflows into modern development pipelines like CI/CD. Dan discusses how tools like Codex CLI are reshaping developer productivity, shifting the role of engineers toward higher-level problem-solving and system design.
They also dive into the broader implications for the future of work, including how individuals and organizations can adapt to rapidly evolving AI capabilities. Dan emphasizes practical experimentation, continuous learning, and embracing new workflows to stay relevant in an AI-driven engineering landscape.
This interview was recorded on April 22, 2026.
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About the Book
Codex CLI is the most comprehensive guide to agentic software engineering with OpenAI's command-line coding agent. Across 32 chapters, you'll move from first principles to advanced orchestration patterns — covering prompting, AGENTS.md configuration, MCP servers, hooks, skills, sub-agents, worktrees, CI/CD integration, security hardening, and enterprise deployment.
Whether you're a solo developer looking to multiply your output or an engineering lead rolling out agentic workflows across a team, this book gives you the mental models and practical techniques to work effectively with AI coding agents.
Written by Daniel Vaughan, drawing on real-world experience and community insights, every chapter includes learning objectives, worked examples, and hands-on exercises.
About the Author
I help organisations understand and navigate the future of work, specifically how Agentic AI is fundamentally transforming software engineering.
With 25 years of experience across enterprise, startup, and academic settings, my focus is now entirely on the most profound technological shift I've seen: the transition to AI-native architectures. I am a technology leader and software architect who specialises in generative AI and cloud strategy, building scalable systems where human engineers and autonomous agents collaborate seamlessly.
I thrive on building the culture and environments needed to support this new era of engineering. My approach is entrepreneurial and customer-focused, with a strong bias for action. Whether I'm advising leaders on AI adoption or getting hands-on with Agentic workflows, my goal is to turn AI hype into tangible, proven success.
Leanpub Book LAUNCH 🚀 Codex CLI: Agentic Engineering from First Principles by Daniel Vaughan
Clips From This Episode of the Leanpub Podcast
