Claude Opus 4.7 Prompt Engineering

Claude Opus 4.7 excels with clear XML-tagged instructions, explicit effort/thinking controls, and well-scoped tool calls in agentic loops. This guide follows Anthropic’s official guidance: use XML tags to separate context from instructions, enable adaptive thinking (`thinking: {type: "adaptive"}`) with the effort parameter, design tool schemas carefully, and add escape hatches so agents stop instead of hallucinating.