{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "title": "PRD Template Variables",
  "description": "Schema for Product Requirements Document template variables",
  "type": "object",
  "required": ["title", "version", "status", "owner", "problem_statement", "goals"],
  "properties": {
    "title": {
      "type": "string",
      "minLength": 5,
      "maxLength": 150,
      "description": "Product or feature title"
    },
    "version": {
      "type": "string",
      "pattern": "^\\d+\\.\\d+(\\.\\d+)?$",
      "description": "Document version (e.g., 1.0, 2.1.0)"
    },
    "status": {
      "type": "string",
      "enum": ["Draft", "In Review", "Approved", "Deprecated"],
      "description": "Document status"
    },
    "owner": {
      "type": "string",
      "minLength": 1,
      "description": "Product owner or author name"
    },
    "stakeholders": {
      "type": "array",
      "items": { "type": "string" },
      "description": "List of stakeholders"
    },
    "problem_statement": {
      "type": "string",
      "minLength": 20,
      "description": "Description of the problem being solved"
    },
    "goals": {
      "type": "array",
      "minItems": 1,
      "items": { "type": "string" },
      "description": "Product/feature goals"
    },
    "non_goals": {
      "type": "array",
      "items": { "type": "string" },
      "description": "Explicit non-goals"
    },
    "user_stories": {
      "type": "array",
      "items": {
        "type": "object",
        "required": ["persona", "want", "so_that"],
        "properties": {
          "persona": { "type": "string" },
          "want": { "type": "string" },
          "so_that": { "type": "string" },
          "priority": {
            "type": "string",
            "enum": ["P0", "P1", "P2", "P3"]
          }
        }
      },
      "description": "User stories in As a/I want/So that format"
    },
    "functional_requirements": {
      "type": "array",
      "items": {
        "type": "object",
        "required": ["id", "description"],
        "properties": {
          "id": { "type": "string" },
          "description": { "type": "string" },
          "priority": { "type": "string" },
          "acceptance_criteria": {
            "type": "array",
            "items": { "type": "string" }
          }
        }
      },
      "description": "Functional requirements"
    },
    "non_functional_requirements": {
      "type": "array",
      "items": {
        "type": "object",
        "required": ["category", "requirement"],
        "properties": {
          "category": {
            "type": "string",
            "enum": ["Performance", "Security", "Scalability", "Reliability", "Usability", "Accessibility", "Compliance"]
          },
          "requirement": { "type": "string" },
          "metric": { "type": "string" }
        }
      },
      "description": "Non-functional requirements"
    },
    "success_metrics": {
      "type": "array",
      "items": {
        "type": "object",
        "required": ["metric", "target"],
        "properties": {
          "metric": { "type": "string" },
          "current": { "type": "string" },
          "target": { "type": "string" },
          "timeline": { "type": "string" }
        }
      },
      "description": "Success metrics with targets"
    },
    "milestones": {
      "type": "array",
      "items": {
        "type": "object",
        "required": ["name"],
        "properties": {
          "name": { "type": "string" },
          "description": { "type": "string" },
          "deliverables": {
            "type": "array",
            "items": { "type": "string" }
          }
        }
      },
      "description": "Project milestones"
    },
    "risks": {
      "type": "array",
      "items": {
        "type": "object",
        "required": ["risk"],
        "properties": {
          "risk": { "type": "string" },
          "impact": {
            "type": "string",
            "enum": ["Low", "Medium", "High", "Critical"]
          },
          "mitigation": { "type": "string" }
        }
      },
      "description": "Identified risks and mitigations"
    },
    "open_questions": {
      "type": "array",
      "items": { "type": "string" },
      "description": "Open questions to be resolved"
    }
  }
}