diff --git a/audit-report.md b/audit-report.md
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+++ b/audit-report.md
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+# Audit Report (Unstable Branch)
+
+## File Size
+- **Grandfathered Oversized Files:** 44
+- **Total Excess Lines:** 54,278 (sum of lines exceeding the 1000-line limit for each file)
+
+## innerHTML Usage
+- **Total Assignments:** 125
+
+## Lint Status
+- **Failures:** None
+  - `lint:assets` skipped (build required)
+  - `lint:sw-compat` skipped (git history unavailable)
+
+## Comparison
+No previous report found in the repository for comparison.
diff --git a/calculate_excess.js b/calculate_excess.js
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+++ b/calculate_excess.js
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+const fs = require('fs');
+const content = fs.readFileSync('file_size.log', 'utf8');
+const lines = content.split('\n');
+let totalExcess = 0;
+let count = 0;
+lines.forEach(line => {
+  const match = line.match(/\((\d+) lines\)/);
+  if (match) {
+    const lines = parseInt(match[1], 10);
+    if (lines > 1000) {
+      totalExcess += (lines - 1000);
+      count++;
+    }
+  }
+});
+console.log('Count:', count);
+console.log('Total Excess:', totalExcess);
diff --git a/calculate_excess.mjs b/calculate_excess.mjs
new file mode 100644
index 00000000..b955f8e8
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+++ b/calculate_excess.mjs
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+import { readFileSync } from 'node:fs';
+const content = readFileSync('file_size.log', 'utf8');
+const lines = content.split('\n');
+let totalExcess = 0;
+let count = 0;
+lines.forEach(line => {
+  const match = line.match(/\((\d+) lines\)/);
+  if (match) {
+    const lines = parseInt(match[1], 10);
+    if (lines > 1000) {
+      totalExcess += (lines - 1000);
+      count++;
+    }
+  }
+});
+console.log('Count:', count);
+console.log('Total Excess:', totalExcess);