developing-claude-plugins

Develops, optimizes, and validates Claude Code plugins, skills (SKILL.md), commands, agents, hooks (hooks.json), and scripts. Ensures consistency with official best practices. Activates when creating, editing, or reviewing files in the plugins/ directory, .claude-plugin/, plugin.json, permissions.json, or marketplace.json. Covers YAML frontmatter, element structure, cross-references, naming conventions, and plugin manifest validation. NOT for application development (use domain-specific skills).