{
  "data": [
    {
      "id": "diag_8f2k4n6m",
      "campaignId": "camp_abc123",
      "campaignName": "Summer Sale 2026 - TOF",
      "status": "completed",
      "riskLevel": "HIGH",
      "summary": "Campaign is spending 40% above target CPA with declining ROAS over the past 7 days. Primary driver is creative fatigue on the top-performing ad set.",
      "issuesDetected": 3,
      "recommendationCount": 2,
      "createdAt": "2026-03-10T14:30:00Z",
      "completedAt": "2026-03-10T14:30:08Z"
    },
    {
      "id": "diag_3j7h9p2q",
      "campaignId": "camp_def456",
      "campaignName": "Retargeting - Cart Abandoners",
      "status": "completed",
      "riskLevel": "HIGH",
      "summary": "Audience overlap of 62% detected between this campaign and 'Retargeting - Viewers'. This is inflating CPMs and causing auction competition against yourself.",
      "issuesDetected": 2,
      "recommendationCount": 3,
      "createdAt": "2026-03-10T12:15:00Z",
      "completedAt": "2026-03-10T12:15:06Z"
    }
  ],
  "pagination": {
    "total": 47,
    "page": 1,
    "page_size": 10,
    "hasMore": true
  }
}

{
  "data": {
    "id": "diag_8f2k4n6m",
    "campaignId": "camp_abc123",
    "campaignName": "Summer Sale 2026 - TOF",
    "metaCampaignId": "23851234567890",
    "status": "completed",
    "riskLevel": "HIGH",
    "summary": "Campaign is spending 40% above target CPA with declining ROAS over the past 7 days. Primary driver is creative fatigue on the top-performing ad set.",
    "dateRange": {
      "from": "2026-03-03",
      "to": "2026-03-10"
    },
    "metrics": {
      "spend": 2840.50,
      "impressions": 412000,
      "clicks": 8240,
      "conversions": 142,
      "cpa": 20.00,
      "roas": 2.1,
      "ctr": 2.0,
      "cpm": 6.89,
      "currency": "EUR"
    },
    "issues": [
      {
        "id": "issue_001",
        "type": "CREATIVE_FATIGUE",
        "severity": "HIGH",
        "title": "Creative fatigue detected on ad set 'Broad Lookalike 1%'",
        "description": "The top 3 creatives in this ad set have been running for 14 days with a 35% increase in frequency and a 22% decline in CTR. Audience saturation is likely.",
        "affectedEntity": {
          "type": "adSet",
          "id": "adset_xyz789",
          "name": "Broad Lookalike 1%"
        },
        "evidence": {
          "frequencyTrend": [1.2, 1.4, 1.6, 1.8, 2.0, 2.1, 2.3],
          "ctrTrend": [2.8, 2.6, 2.4, 2.3, 2.1, 2.0, 1.9]
        }
      },
      {
        "id": "issue_002",
        "type": "CPA_DEGRADATION",
        "severity": "HIGH",
        "title": "CPA increased 40% above target",
        "description": "Target CPA is EUR 14.00 but actual CPA has risen to EUR 20.00 over the past 7 days. This correlates with the creative fatigue in the primary ad set.",
        "affectedEntity": {
          "type": "campaign",
          "id": "camp_abc123",
          "name": "Summer Sale 2026 - TOF"
        },
        "evidence": {
          "targetCpa": 14.00,
          "actualCpa": 20.00,
          "cpaTrend": [14.20, 15.10, 16.40, 17.80, 18.50, 19.20, 20.00]
        }
      },
      {
        "id": "issue_003",
        "type": "LEARNING_PHASE_STALL",
        "severity": "MEDIUM",
        "title": "Ad set 'Interest Stack - Fitness' stuck in learning",
        "description": "This ad set has been in the learning phase for 5 days with only 18 conversions (50 required to exit). Current daily spend is too low to generate enough conversions.",
        "affectedEntity": {
          "type": "adSet",
          "id": "adset_lmn456",
          "name": "Interest Stack - Fitness"
        },
        "evidence": {
          "daysInLearning": 5,
          "conversionsInLearning": 18,
          "requiredConversions": 50
        }
      }
    ],
    "recommendations": [
      {
        "id": "rec_001",
        "priority": 1,
        "action": "Refresh creatives in 'Broad Lookalike 1%' ad set",
        "rationale": "The current creatives are fatigued after 14 days. Introducing 3-5 new creatives will reset frequency and likely recover CTR to previous levels.",
        "expectedImpact": "Estimated 15-25% CPA reduction within 5-7 days",
        "riskLevel": "LOW",
        "relatedIssues": ["issue_001", "issue_002"]
      },
      {
        "id": "rec_002",
        "priority": 2,
        "action": "Increase daily budget on 'Interest Stack - Fitness' by 30% or consolidate into a performing ad set",
        "rationale": "The ad set cannot exit learning phase at current spend levels. Either increase budget to accelerate learning or reallocate the budget to a proven ad set.",
        "expectedImpact": "Learning phase exit within 3-4 days if budget increased",
        "riskLevel": "MEDIUM",
        "relatedIssues": ["issue_003"]
      }
    ],
    "andromedaContext": {
      "riskAppetite": "MEDIUM",
      "focusMetric": "ROAS",
      "adaptations": "Recommendations prioritize ROAS recovery over volume. Conservative budget suggestions aligned with medium risk appetite."
    },
    "createdAt": "2026-03-10T14:30:00Z",
    "completedAt": "2026-03-10T14:30:08Z",
    "processingTimeMs": 8200
  }
}

{
  "data": {
    "id": "diag_9k3m5p7r",
    "campaignId": "camp_abc123",
    "status": "pending",
    "createdAt": "2026-03-10T15:00:00Z",
    "estimatedCompletionSeconds": 8
  }
}

{
  "error": {
    "type": "diagnostic_in_progress",
    "message": "A diagnostic is already running for campaign camp_abc123. Please wait for it to complete before triggering another."
  }
}