Gemini 3: Don't Mix XML and Markdown in a Prompt

Gemini 3 best practices emphasize using XML-style tags or Markdown to provide unambiguous boundaries between instructions and data—but explicitly warn not to mix XML and Markdown; choose one format for consistency throughout the prompt.

<context>{{DOCUMENT_TEXT}}</context> <task>Extract all service-level objective (SLO) latency targets and error budgets from the context above.</task> <final_instruction>Think step-by-step before answering and format the output using XML tags.</final_instruction>