diff --git a/scripts/backfill-duplicate-comments.ts b/scripts/backfill-duplicate-comments.ts
index 457b1a38..f79ab431 100644
--- a/scripts/backfill-duplicate-comments.ts
+++ b/scripts/backfill-duplicate-comments.ts
@@ -82,46 +82,61 @@ Usage:
 Environment Variables:
   GITHUB_TOKEN - GitHub personal access token with repo and actions permissions (required)
   DRY_RUN - Set to "false" to actually trigger workflows (default: true for safety)
-  DAYS_BACK - How many days back to look for old issues (default: 90)`);
+  MAX_ISSUE_NUMBER - Only process issues with numbers less than this value (default: 4050)`);
   }
   console.log("[DEBUG] GitHub token found");
 
   const owner = "anthropics";
   const repo = "claude-code";
   const dryRun = process.env.DRY_RUN !== "false";
-  const daysBack = parseInt(process.env.DAYS_BACK || "90", 10);
+  const maxIssueNumber = parseInt(process.env.MAX_ISSUE_NUMBER || "4050", 10);
+  const minIssueNumber = parseInt(process.env.MIN_ISSUE_NUMBER || "1", 10);
   
   console.log(`[DEBUG] Repository: ${owner}/${repo}`);
   console.log(`[DEBUG] Dry run mode: ${dryRun}`);
-  console.log(`[DEBUG] Looking back ${daysBack} days`);
+  console.log(`[DEBUG] Looking at issues between #${minIssueNumber} and #${maxIssueNumber}`);
 
-  const cutoffDate = new Date();
-  cutoffDate.setDate(cutoffDate.getDate() - daysBack);
-
-  console.log(`[DEBUG] Fetching issues created since ${cutoffDate.toISOString()}...`);
+  console.log(`[DEBUG] Fetching issues between #${minIssueNumber} and #${maxIssueNumber}...`);
   const allIssues: GitHubIssue[] = [];
   let page = 1;
   const perPage = 100;
   
   while (true) {
     const pageIssues: GitHubIssue[] = await githubRequest(
-      `/repos/${owner}/${repo}/issues?state=all&per_page=${perPage}&page=${page}&since=${cutoffDate.toISOString()}`,
+      `/repos/${owner}/${repo}/issues?state=all&per_page=${perPage}&page=${page}&sort=created&direction=desc`,
       token
     );
     
     if (pageIssues.length === 0) break;
     
-    allIssues.push(...pageIssues);
+    // Filter to only include issues within the specified range
+    const filteredIssues = pageIssues.filter(issue => 
+      issue.number >= minIssueNumber && issue.number < maxIssueNumber
+    );
+    allIssues.push(...filteredIssues);
+    
+    // If the oldest issue in this page is still above our minimum, we need to continue
+    // but if the oldest issue is below our minimum, we can stop
+    const oldestIssueInPage = pageIssues[pageIssues.length - 1];
+    if (oldestIssueInPage && oldestIssueInPage.number >= maxIssueNumber) {
+      console.log(`[DEBUG] Oldest issue in page #${page} is #${oldestIssueInPage.number}, continuing...`);
+    } else if (oldestIssueInPage && oldestIssueInPage.number < minIssueNumber) {
+      console.log(`[DEBUG] Oldest issue in page #${page} is #${oldestIssueInPage.number}, below minimum, stopping`);
+      break;
+    } else if (filteredIssues.length === 0 && pageIssues.length > 0) {
+      console.log(`[DEBUG] No issues in page #${page} are in range #${minIssueNumber}-#${maxIssueNumber}, continuing...`);
+    }
+    
     page++;
     
     // Safety limit to avoid infinite loops
-    if (page > 100) {
+    if (page > 200) {
       console.log("[DEBUG] Reached page limit, stopping pagination");
       break;
     }
   }
   
-  console.log(`[DEBUG] Found ${allIssues.length} issues from the last ${daysBack} days`);
+  console.log(`[DEBUG] Found ${allIssues.length} issues between #${minIssueNumber} and #${maxIssueNumber}`);
 
   let processedCount = 0;
   let candidateCount = 0;