feat: add file change tracking to session metrics (#6094)

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>
Co-authored-by: Jacob Richman <jacob314@gmail.com>

packages/cli/src/ui/utils/computeStats.test.ts

@@ -121,6 +121,10 @@ describe('computeSessionStats', () => {
         totalDecisions: { accept: 0, reject: 0, modify: 0 },
         byName: {},
       },
+      files: {
+        totalLinesAdded: 0,
+        totalLinesRemoved: 0,
+      },
     };
 
     const result = computeSessionStats(metrics);
@@ -137,6 +141,8 @@ describe('computeSessionStats', () => {
       agreementRate: 0,
       totalPromptTokens: 0,
       totalCachedTokens: 0,
+      totalLinesAdded: 0,
+      totalLinesRemoved: 0,
     });
   });
 
@@ -163,6 +169,10 @@ describe('computeSessionStats', () => {
         totalDecisions: { accept: 0, reject: 0, modify: 0 },
         byName: {},
       },
+      files: {
+        totalLinesAdded: 0,
+        totalLinesRemoved: 0,
+      },
     };
 
     const result = computeSessionStats(metrics);
@@ -197,6 +207,10 @@ describe('computeSessionStats', () => {
         totalDecisions: { accept: 0, reject: 0, modify: 0 },
         byName: {},
       },
+      files: {
+        totalLinesAdded: 0,
+        totalLinesRemoved: 0,
+      },
     };
 
     const result = computeSessionStats(metrics);
@@ -215,6 +229,10 @@ describe('computeSessionStats', () => {
         totalDecisions: { accept: 6, reject: 2, modify: 2 },
         byName: {},
       },
+      files: {
+        totalLinesAdded: 0,
+        totalLinesRemoved: 0,
+      },
     };
 
     const result = computeSessionStats(metrics);
@@ -234,6 +252,10 @@ describe('computeSessionStats', () => {
         totalDecisions: { accept: 0, reject: 0, modify: 0 },
         byName: {},
       },
+      files: {
+        totalLinesAdded: 0,
+        totalLinesRemoved: 0,
+      },
     };
 
     const result = computeSessionStats(metrics);
@@ -244,4 +266,27 @@ describe('computeSessionStats', () => {
     expect(result.successRate).toBe(0);
     expect(result.agreementRate).toBe(0);
   });
+
+  it('should correctly include line counts', () => {
+    const metrics: SessionMetrics = {
+      models: {},
+      tools: {
+        totalCalls: 0,
+        totalSuccess: 0,
+        totalFail: 0,
+        totalDurationMs: 0,
+        totalDecisions: { accept: 0, reject: 0, modify: 0 },
+        byName: {},
+      },
+      files: {
+        totalLinesAdded: 42,
+        totalLinesRemoved: 18,
+      },
+    };
+
+    const result = computeSessionStats(metrics);
+
+    expect(result.totalLinesAdded).toBe(42);
+    expect(result.totalLinesRemoved).toBe(18);
+  });
 });

packages/cli/src/ui/utils/computeStats.ts

@@ -34,7 +34,7 @@ export function calculateCacheHitRate(metrics: ModelMetrics): number {
 export const computeSessionStats = (
   metrics: SessionMetrics,
 ): ComputedSessionStats => {
-  const { models, tools } = metrics;
+  const { models, tools, files } = metrics;
   const totalApiTime = Object.values(models).reduce(
     (acc, model) => acc + model.api.totalLatencyMs,
     0,
@@ -80,5 +80,7 @@ export const computeSessionStats = (
     agreementRate,
     totalCachedTokens,
     totalPromptTokens,
+    totalLinesAdded: files.totalLinesAdded,
+    totalLinesRemoved: files.totalLinesRemoved,
   };
 };