claude-extensibility

Create and manage Claude Code extensions by defining standardized SKILL.md frontmatter and structured content. This provides centralized CRUD for agents, skills, and output styles, ensuring consistent governance across multiple projects.

Progressive disclosure in Claude skills works by using YAML frontmatter, references, and templates to layer information. This approach keeps the SKILL.md file concise while allowing Claude to access detailed instructions only when needed during execution.

Configure tool access and models for custom Claude agents through YAML frontmatter management. You can specify allowed tools, select models, and define prompts within the SKILL.md file to control agent capabilities and behavior.

Best practices for writing a SKILL.md file include keeping content under 500 lines, including WHAT and WHEN in descriptions, and providing clear testing and lifecycle guidance. This ensures optimal agent activation and maintainability.

Test activation of new Claude skills and agents by verifying the SKILL.md frontmatter triggers correctly. The standardized lifecycle guidance helps validate that the agent activates under the intended conditions and accesses the configured tools.

Yes, YAML frontmatter is required to define output styles for Claude. It serves as the standardized entry point for configuring extensions, allowing you to manage prompts, references, and lifecycle governance within the same file structure.