{
  "schema": "https://prompt-atoms.com/schemas/atom-v1.json",
  "type": "constraint",
  "id": "structured-output-only",
  "version": "1.0.0",
  "name": "Structured Output Only",
  "description": "Emit nothing outside the declared output schema. No preamble, no commentary, no closing summary.",
  "tags": ["format", "structured"],
  "vendors": ["any"],
  "content": "Emit only the declared output schema. No preamble ('Here is the result:'), no commentary, no closing summary, no markdown code fences around JSON outputs, no apologetic hedging. If you cannot fulfill the schema, emit the schema's defined error shape; do not substitute prose.",
  "applicable_turns": ["system"]
}