Let's Build a Custom Agent! | Ep 4 of 8
Reynald Adolphe shows how to create and use Custom Agents in VS Code so GitHub Copilot can take on specialized roles (for example, a security reviewer) with better project context and more focused outputs.
Full summary based on transcript
Introduction to Custom Agents
The presenter introduces Custom Agents (Agent Mode) in VS Code and frames them as a way to make AI behavior more focused by giving it a specific role and expectations.
What Custom Agents are
Reynald explains that Custom Agents are specialized AI roles you can define (for example, a security reviewer or an “arcade app builder”) so Copilot’s responses are more context-aware and aligned with a particular task.
Quick look at the documentation
The presenter briefly references the official docs for Custom Agents and where to find more examples and guidance.
Demo: security-reviewer-agent-mode
Reynald demonstrates an example agent focused on security review, showing how a role-specific agent can guide Copilot toward security-oriented feedback rather than general-purpose suggestions.
Creating a new Custom Agent
The presenter walks through creating a new Custom Agent, focusing on how you define the agent’s role and how it’s intended to understand your project, tools, and workflow.
Learn more
Links and resources are provided for the Custom Agents documentation and a curated list of GitHub Copilot resources.
In summary
Reynald recaps that Custom Agents help make Copilot more effective by narrowing its “job” to a specific role and leveraging project/workspace context.