Europe 2026
Agentic Engineering: Working With AI, Not Just Using It — Brendan O'Leary
Overview
This talk introduces the concept of agentic engineering, shifting the paradigm from merely using AI tools to actively collaborating with them. It highlights the evolution of AI in software development from simple line completion to sophisticated agents capable of executing complex tasks. The core thesis is that understanding and managing AI agents as collaborators, akin to junior developers, is crucial for maximizing their potential and navigating the complexities of modern software development.
Who should watch
- AI engineers and developers
- Product Managers and builders
- Those looking to understand how to effectively integrate AI into their workflows
- Individuals struggling to articulate their current AI usage
- Teams aiming to move beyond basic AI tool usage to deeper collaboration
Key takeaways
- AI in software engineering has evolved from auto-completion to agents that can break down tasks, make changes, and run tests, acting as collaborators rather than just tools.
- Effective agentic engineering requires a mental model shift, viewing AI agents as enthusiastic, well-read, but context-lacking junior developers who need clear direction and judgment.
- Context engineering is critical; managing the context window by being selective, summarizing, and isolating information prevents cost overruns and degradation of AI performance.
- A structured approach like the research-plan-implement loop is more effective than jumping directly into coding, ensuring a better understanding of the problem and leading to higher quality code.
- AI agents lack inherent judgment and business context, making human oversight essential to ensure technical correctness aligns with contextual requirements.
- Tools and configurations like specialized modes (ask, architect, code), agents.md for project-specific rules, and skills.md for reusable workflows help customize agent behavior.
- Leveraging features like at-mentioning for context, slash commands for task management, and integrating agents across various platforms (CLI, Slack) enhances collaboration.
- Careful management of MCP servers and internal platform APIs is necessary to avoid unnecessary token usage and potential agent confusion.
Notable quotes
*We're no longer just using machines. We're now working with them.*
*AI can't replace thinking. It can only amplify the thinking you've done or the lack of thinking you haven't done.*
Unofficial community note. Prefer the recording for nuance.