Use when developing WordPress (Gutenberg) blocks: block.json metadata, register_block_type(_from_metadata), attributes/serialization, supports, dynamic rendering (render.php/render_callback), deprecations/migrations, viewScript vs viewScriptModule, and @wordpress/scripts/@wordpress/create-block build and test workflows.
Install
npx skills add WordPress/agent-skills --skill wp-block-developmentnpx skills add WordPress/agent-skills --skill wp-block-development -a claude-code -gnpx skills add WordPress/agent-skills --skill wp-block-development -a codex -ggemini skills install https://github.com/WordPress/agent-skills.git --path skills/wp-block-developmentgh skill install WordPress/agent-skills wp-block-developmentgit clone --depth 1 https://github.com/WordPress/agent-skills /tmp/WordPress__agent-skills
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/WordPress__agent-skills/skills/wp-block-development ~/.claude/skills/wp-block-development # Claude Code
cp -R /tmp/WordPress__agent-skills/skills/wp-block-development ~/.agents/skills/wp-block-development # Codex, Cursor, Gemini CLI, Copilot, OpenCode