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Add script to backfill duplicate comments for old issues
Creates a script that identifies old issues without duplicate detection comments and triggers the existing claude-dedupe-issues workflow for each one. This helps ensure historical issues get proper duplicate detection coverage. Features: - Scans issues from configurable time period (default 30 days) - Skips issues that already have duplicate detection comments - Triggers existing workflow instead of duplicating logic - Includes dry-run mode and rate limiting for safety 🤖 Generated with [Claude Code](https://claude.ai/code) Co-Authored-By: Claude <noreply@anthropic.com>
This commit is contained in:
Boris Cherny
198
scripts/backfill-duplicate-comments.ts
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198
scripts/backfill-duplicate-comments.ts
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#!/usr/bin/env bun
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declare global {
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var process: {
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env: Record<string, string | undefined>;
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};
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}
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interface GitHubIssue {
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number: number;
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title: string;
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state: string;
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state_reason?: string;
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user: { id: number };
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created_at: string;
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closed_at?: string;
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}
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interface GitHubComment {
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id: number;
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body: string;
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created_at: string;
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user: { type: string; id: number };
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}
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async function githubRequest<T>(endpoint: string, token: string, method: string = 'GET', body?: any): Promise<T> {
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const response = await fetch(`https://api.github.com${endpoint}`, {
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method,
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headers: {
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Authorization: `Bearer ${token}`,
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Accept: "application/vnd.github.v3+json",
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"User-Agent": "backfill-duplicate-comments-script",
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...(body && { "Content-Type": "application/json" }),
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},
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...(body && { body: JSON.stringify(body) }),
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});
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if (!response.ok) {
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throw new Error(
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`GitHub API request failed: ${response.status} ${response.statusText}`
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);
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}
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return response.json();
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}
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async function triggerDedupeWorkflow(
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owner: string,
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repo: string,
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issueNumber: number,
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token: string,
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dryRun: boolean = true
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): Promise<void> {
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if (dryRun) {
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console.log(`[DRY RUN] Would trigger dedupe workflow for issue #${issueNumber}`);
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return;
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}
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await githubRequest(
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`/repos/${owner}/${repo}/actions/workflows/claude-dedupe-issues.yml/dispatches`,
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token,
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'POST',
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{
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ref: 'main',
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inputs: {
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issue_number: issueNumber.toString()
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}
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}
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);
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}
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async function backfillDuplicateComments(): Promise<void> {
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console.log("[DEBUG] Starting backfill duplicate comments script");
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const token = process.env.GITHUB_TOKEN;
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if (!token) {
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throw new Error(`GITHUB_TOKEN environment variable is required
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Usage:
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GITHUB_TOKEN=your_token bun run scripts/backfill-duplicate-comments.ts
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Environment Variables:
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GITHUB_TOKEN - GitHub personal access token with repo and actions permissions (required)
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DRY_RUN - Set to "false" to actually trigger workflows (default: true for safety)
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DAYS_BACK - How many days back to look for old issues (default: 90)`);
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}
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console.log("[DEBUG] GitHub token found");
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const owner = "anthropics";
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const repo = "claude-code";
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const dryRun = process.env.DRY_RUN !== "false";
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const daysBack = parseInt(process.env.DAYS_BACK || "90", 10);
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console.log(`[DEBUG] Repository: ${owner}/${repo}`);
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console.log(`[DEBUG] Dry run mode: ${dryRun}`);
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console.log(`[DEBUG] Looking back ${daysBack} days`);
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const cutoffDate = new Date();
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cutoffDate.setDate(cutoffDate.getDate() - daysBack);
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console.log(`[DEBUG] Fetching issues created since ${cutoffDate.toISOString()}...`);
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const allIssues: GitHubIssue[] = [];
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let page = 1;
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const perPage = 100;
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while (true) {
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const pageIssues: GitHubIssue[] = await githubRequest(
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`/repos/${owner}/${repo}/issues?state=all&per_page=${perPage}&page=${page}&since=${cutoffDate.toISOString()}`,
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token
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);
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if (pageIssues.length === 0) break;
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allIssues.push(...pageIssues);
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page++;
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// Safety limit to avoid infinite loops
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if (page > 100) {
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console.log("[DEBUG] Reached page limit, stopping pagination");
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break;
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}
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}
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console.log(`[DEBUG] Found ${allIssues.length} issues from the last ${daysBack} days`);
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let processedCount = 0;
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let candidateCount = 0;
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let triggeredCount = 0;
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for (const issue of allIssues) {
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processedCount++;
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console.log(
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`[DEBUG] Processing issue #${issue.number} (${processedCount}/${allIssues.length}): ${issue.title}`
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);
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console.log(`[DEBUG] Fetching comments for issue #${issue.number}...`);
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const comments: GitHubComment[] = await githubRequest(
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`/repos/${owner}/${repo}/issues/${issue.number}/comments`,
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token
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);
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console.log(
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`[DEBUG] Issue #${issue.number} has ${comments.length} comments`
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);
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// Look for existing duplicate detection comments (from the dedupe bot)
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const dupeDetectionComments = comments.filter(
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(comment) =>
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comment.body.includes("Found") &&
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comment.body.includes("possible duplicate") &&
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comment.user.type === "Bot"
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);
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console.log(
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`[DEBUG] Issue #${issue.number} has ${dupeDetectionComments.length} duplicate detection comments`
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);
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// Skip if there's already a duplicate detection comment
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if (dupeDetectionComments.length > 0) {
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console.log(
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`[DEBUG] Issue #${issue.number} already has duplicate detection comment, skipping`
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);
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continue;
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}
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candidateCount++;
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const issueUrl = `https://github.com/${owner}/${repo}/issues/${issue.number}`;
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try {
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console.log(
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`[INFO] ${dryRun ? '[DRY RUN] ' : ''}Triggering dedupe workflow for issue #${issue.number}: ${issueUrl}`
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);
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await triggerDedupeWorkflow(owner, repo, issue.number, token, dryRun);
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if (!dryRun) {
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console.log(
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`[SUCCESS] Successfully triggered dedupe workflow for issue #${issue.number}`
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);
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}
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triggeredCount++;
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} catch (error) {
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console.error(
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`[ERROR] Failed to trigger workflow for issue #${issue.number}: ${error}`
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);
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}
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// Add a delay between workflow triggers to avoid overwhelming the system
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await new Promise(resolve => setTimeout(resolve, 1000));
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}
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console.log(
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`[DEBUG] Script completed. Processed ${processedCount} issues, found ${candidateCount} candidates without duplicate comments, ${dryRun ? 'would trigger' : 'triggered'} ${triggeredCount} workflows`
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);
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}
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backfillDuplicateComments().catch(console.error);
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// Make it a module
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export {};
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