diff --git a/src/tools/advanced-caching/cache-analytics.ts b/src/tools/advanced-caching/cache-analytics.ts
index 2bc9e60..b0f9706 100644
--- a/src/tools/advanced-caching/cache-analytics.ts
+++ b/src/tools/advanced-caching/cache-analytics.ts
@@ -887,7 +887,7 @@ export class CacheAnalyticsTool extends EventEmitter {
       0
     );
     const compressionSavings = operations.reduce(
-      (sum, op) => sum + (op.outputTokens - op.cachedTokens || 0),
+      (sum, op) => sum + (((op.outputTokens ?? 0) - (op.cachedTokens ?? 0)) || 0),
       0
     );
 
diff --git a/src/tools/intelligence/anomaly-explainer.ts b/src/tools/intelligence/anomaly-explainer.ts
index fa5983b..bb24939 100644
--- a/src/tools/intelligence/anomaly-explainer.ts
+++ b/src/tools/intelligence/anomaly-explainer.ts
@@ -996,18 +996,18 @@ export class AnomalyExplainer {
     // Check for cyclical pattern
     const seasonality = this.detectSeasonality(historicalData);
 
-    if (seasonality.detected && seasonality.strength && seasonality.strength > 0.6) {
+    if (seasonality?.detected && (seasonality?.strength ?? 0) > 0.6) {
       causes.push({
         id: 'rc-seasonal',
-        description: `Seasonality pattern detected with ${seasonality.period}ms period`,
+        description: `Seasonality pattern detected with ${seasonality.period ?? 0}ms period`,
         probability: seasonality.strength,
         evidence: [{
           type: 'temporal',
-          description: `Regular pattern repeats every ${seasonality.period}ms`,
+          description: `Regular pattern repeats every ${seasonality.period ?? 0}ms`,
           strength: seasonality.strength
         }],
         relatedMetrics: [anomaly.metric],
-        timeRange: { start: anomaly.timestamp - (seasonality.period || 0), end: anomaly.timestamp }
+        timeRange: { start: anomaly.timestamp - (seasonality.period ?? 0), end: anomaly.timestamp }
       });
     }