Creating and Updating Agent Skills

learning

skill-creator is a Claude Code skill that guides users through creating and updating Agent Skills — modular, self-contained packages that extend an AI agent with specialized workflows, domain knowledge, and tool integrations. It covers the full package anatomy: a required SKILL.md file with YAML frontmatter fields (name, description, license, compatibility, metadata, allowed-tools), optional bundled directories for scripts, references, and assets, and auto-activation trigger configuration supporting domain and guardrail types, enforce levels (suggest, warn, block), keywords, regex intent-patterns, and file glob patterns. The skill also explains the 500-line rule and the core principle that the context window is a shared resource — only include what the agent genuinely lacks. Aimed at developers building their own skills for the Agent Skills platform or anyone wanting to understand the agentskills.io specification in depth.