According to God of Prompt on X (as reported in the original tweet by @godofprompt), the team released a free Claude Mastery Guide updated with a full Claude Skills section, 30 prompt engineering principles, and 10+ ready-to-copy mega-prompts. According to the tweet, Claude Skills is a lesser-known feature that enables structured, reusable task capabilities inside Anthropic’s Claude ecosystem, which can accelerate prompt standardization and team onboarding. As reported by the tweet, offering the guide for free lowers adoption friction for startups and agencies evaluating Claude for content operations, research synthesis, and workflow automation, creating near-term opportunities to improve prompt governance, reduce iteration costs, and scale AI-assisted SOPs.