{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "x_schema_version": 1,
  "type": "object",
  "additionalProperties": false,
  "required": ["title", "period", "summary_md", "kpis", "findings", "recommendations", "operator_actions"],
  "properties": {
    "title": { "type": "string" },
    "period": {
      "type": "object",
      "additionalProperties": false,
      "required": ["from", "to"],
      "properties": {
        "from": { "type": "string" },
        "to": { "type": "string" }
      }
    },
    "summary_md": { "type": "string" },
    "kpis": {
      "type": "object",
      "additionalProperties": false,
      "required": ["apply_count", "fallback_count", "fallback_rate", "fallback_rate_excluding_non_utf8", "repair_success_rate", "sha_injection_rate"],
      "properties": {
        "apply_count": { "type": "integer", "minimum": 0 },
        "fallback_count": { "type": "integer", "minimum": 0 },
        "fallback_rate": { "type": "number", "minimum": 0, "maximum": 1 },
        "fallback_rate_excluding_non_utf8": { "type": "number", "minimum": 0, "maximum": 1 },
        "repair_success_rate": { "type": "number", "minimum": 0, "maximum": 1 },
        "sha_injection_rate": { "type": "number", "minimum": 0, "maximum": 1 }
      }
    },
    "findings": {
      "type": "array",
      "items": {
        "type": "object",
        "additionalProperties": false,
        "required": ["severity", "title", "evidence"],
        "properties": {
          "severity": { "type": "string", "enum": ["info", "warning", "critical"] },
          "title": { "type": "string" },
          "evidence": { "type": "string" }
        }
      }
    },
    "recommendations": {
      "type": "array",
      "items": {
        "type": "object",
        "additionalProperties": false,
        "required": ["priority", "title", "rationale", "expected_impact"],
        "properties": {
          "priority": { "type": "string", "enum": ["p0", "p1", "p2"] },
          "title": { "type": "string" },
          "rationale": { "type": "string" },
          "expected_impact": { "type": "string" }
        }
      }
    },
    "operator_actions": {
      "type": "array",
      "items": {
        "type": "object",
        "additionalProperties": false,
        "required": ["title", "steps", "time_estimate_minutes"],
        "properties": {
          "title": { "type": "string" },
          "steps": { "type": "array", "items": { "type": "string" } },
          "time_estimate_minutes": { "type": "integer", "minimum": 1 }
        }
      }
    },
    "proposals": {
      "type": "array",
      "description": "Concrete actionable proposals (prompt_change, setting_change, golden_trace_add, limit_tuning, safety_rule). Only propose what bundle+deltas justify.",
      "items": {
        "type": "object",
        "additionalProperties": false,
        "required": ["kind", "title", "why", "risk", "steps", "expected_impact"],
        "properties": {
          "kind": { "type": "string", "enum": ["prompt_change", "setting_change", "golden_trace_add", "limit_tuning", "safety_rule"] },
          "title": { "type": "string" },
          "why": { "type": "string" },
          "risk": { "type": "string", "enum": ["low", "medium", "high"] },
          "steps": { "type": "array", "items": { "type": "string" } },
          "expected_impact": { "type": "string" },
          "evidence": { "type": "string" }
        }
      }
    }
  }
}