Atlas › 01 Agent Skills for Browser Automation › Anatomy of a SKILL.md File☰ Read as one page
Anatomy of a SKILL.md File
1.1The Two-Part StructureEvery skill is a single markdown file with YAML frontmatter and markdown body:1.2YAML Frontmatter: The Selection Signalname (string, max 64 chars) - Lowercase letters, numbers, hyphens only - This becomes the invocation command: /my-skill or skill…1.3Markdown Body: The Execution InstructionsThe body is what Claude reads when the skill is invoked. It should be structured for an AI agent, not a human reader.1.4Bundled Resources (Optional Directories)Skills can include additional directories alongside SKILL.md:1.5The CLI-Wrapping Skill PatternThe best browser-automation skills are intentionally minimal — a single SKILL.md file with zero bundled resources:1.6How the Agent Uses the Skill at RuntimeHere's what happens when you say "Go to example.com and take a screenshot":1.7Interview Talking Point"Agent skills are a fundamentally different architectural choice from MCP servers. Where MCP adds tool schemas to the context window…