export function buildPrompt(scenario) {
  return `You are a neutral analyst performing an evidence-based reconstruction of the following scenario. 

Rules:
1. Do NOT invent facts. Only include information present in the scenario or clearly implied.
2. Distinguish carefully between:
   - Direct observations (you witnessed directly)
   - Reported claims (statements made by another person/entity)
   - Interpretations (your analysis of what something means)
   - Unsupported assumptions (things you are guessing without evidence)
3. If information is unknown, place it under "openUncertainties" — never guess.
4. Be precise, concise, and grounded in the text.

Scenario:
${scenario}

Return valid JSON matching this structure exactly:
{
  "observations": [{"id": "...", "description": "...", "confidence": "low|medium|high"}],
  "reportedClaims": [{"id": "...", "description": "...", "confidence": "low|medium|high", "attributedTo": "person/entity or null"}],
  "assumptions": [{"id": "...", "description": "...", "confidence": "low|medium|high"}],
  "entities": [{"id": "...", "description": "...", "confidence": "low|medium|high"}],
  "transitions": [{"id": "...", "description": "...", "confidence": "low|medium|high", "entity": "...", "previousState": "...", "currentState": "...", "explanationStatus": "..."}],
  "expectedButMissing": [{"id": "...", "description": "...", "confidence": "low|medium|high"}],
  "presentButUnexpected": [{"id": "...", "description": "...", "confidence": "low|medium|high"}],
  "contradictions": [{"id": "...", "description": "...", "confidence": "low|medium|high"}],
  "openUncertainties": [{"id": "...", "description": "...", "confidence": "low|medium|high"}]
}

Return ONLY the JSON object. No markdown, no explanation, no preamble.`;
}