Author, save, and edit email templates in the PostHog workflows library — compose email design JSON with Liquid personalization and create and round-trip-edit templates over MCP. Use when asked to design, build, update, or fix an email template for workflows, broadcasts, or campaigns.
Install
npx skills add PostHog/ai-plugin --skill designing-email-templatesnpx skills add PostHog/ai-plugin --skill designing-email-templates -a claude-code -gnpx skills add PostHog/ai-plugin --skill designing-email-templates -a codex -ggemini skills install https://github.com/PostHog/ai-plugin.git --path skills/designing-email-templatesgh skill install PostHog/ai-plugin designing-email-templatesgit clone --depth 1 https://github.com/PostHog/ai-plugin /tmp/PostHog__ai-plugin
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/PostHog__ai-plugin/skills/designing-email-templates ~/.claude/skills/designing-email-templates # Claude Code
cp -R /tmp/PostHog__ai-plugin/skills/designing-email-templates ~/.agents/skills/designing-email-templates # Codex, Cursor, Gemini CLI, Copilot, OpenCode