copilot-agent-builder

Create a Copilot agent by generating a .agent.md file with YAML frontmatter containing name, description, and tools configuration. This Skill produces ready-to-use agent manifests that enable structured, repeatable AI-assisted coding sessions in VS Code.

The .agent.md format is a GitHub Copilot agent manifest combining YAML frontmatter with Markdown instructions. It standardizes agent definitions with required fields (description, name, tools) and optional handoffs, enabling multi-step workflows across planning, implementation, and testing tasks.

Yes, define multi-step handoffs within agent manifests to route tasks between agents. This enables structured workflows like planning → implementation → testing, where each agent handles a specialized phase with its own tools and instructions.

Include tool names and clear usage instructions in the agent's YAML tools section and Markdown body. The Skill validates mandatory tool references and generates manifests that guide Copilot on when and how to invoke each tool during assisted coding sessions.

The generated .agent.md file is ready to use immediately in VS Code. Place it in .github/agents/ and invoke the agent in Copilot chat to run structured workflows with predefined tools, handoffs, and guidance for automation, security reviews, code quality, or documentation tasks.

No prerequisite YAML expertise required. This Skill handles YAML frontmatter generation and validation automatically, producing syntactically correct agent manifests. You define the agent's purpose, tools, and workflow; the Skill structures them into valid .agent.md format.