According to God of Prompt on Twitter, the Claude Mastery Guide is available at godofprompt.ai/claude-mastery-guide. As reported by the guide's landing page, the resource focuses on prompt engineering patterns for Anthropic's Claude 3.5 family, including structured prompts, tool-use orchestration, and evaluation workflows for enterprise deployments. According to the site description, the guide covers system prompt design, role and constraint templates, JSON mode reliability, and retrieval-augmented generation patterns aimed at improving accuracy and latency for production use. As stated on godofprompt.ai, it also includes business playbooks for customer support automation, sales enablement, code review, and knowledge base assistants with measurable KPIs such as deflection rate, first-response time, and cost per ticket. According to the same source, the guide provides step-by-step prompt A/B testing methods, model selection guidance across Claude 3.5 Sonnet and Haiku, safety red-teaming checklists aligned with Anthropic policies, and deployment tips for throughput scaling and context management. For AI teams, this indicates practical opportunities to standardize Claude prompts, reduce hallucinations through constrained outputs, and accelerate time-to-value in customer-facing and internal workflows, as reported by the guide.