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## Summary
This PR adds a Claude Code-powered issue deduplication system to help
reduce duplicate issues in the Bun repository.
### What's included:
1. **`/dedupe` slash command** (`.claude/commands/dedupe.md`)
- Claude Code command to find up to 3 duplicate issues for a given
GitHub issue
- Uses parallel agent searches with diverse keywords
- Filters out false positives
2. **Automatic dedupe on new issues**
(`.github/workflows/claude-dedupe-issues.yml`)
- Runs automatically when a new issue is opened
- Can also be triggered manually via workflow_dispatch
- Uses the Claude Code base action to run the `/dedupe` command
3. **Auto-close workflow**
(`.github/workflows/auto-close-duplicates.yml`)
- Runs daily to close issues marked as duplicates after 3 days
- Only closes if:
- Issue has a duplicate detection comment from bot
- Comment is 3+ days old
- No comments or activity after duplicate comment
- Author hasn't reacted with 👎 to the duplicate comment
4. **Auto-close script** (`scripts/auto-close-duplicates.ts`)
- TypeScript script that handles the auto-closing logic
- Fetches open issues and checks for duplicate markers
- Closes issues with proper labels and notifications
### How it works:
1. When a new issue is opened, the workflow runs Claude Code to analyze
it
2. Claude searches for duplicates and comments on the issue if any are
found
3. Users have 3 days to respond if they disagree
4. After 3 days with no activity, the issue is automatically closed
### Requirements:
- `ANTHROPIC_API_KEY` secret needs to be set in the repository settings
for the dedupe workflow to run
## Test plan
- [x] Verified workflow files have correct syntax
- [x] Verified script references correct repository (oven-sh/bun)
- [x] Verified slash command matches claude-code implementation
- [ ] Test workflow manually with workflow_dispatch (requires
ANTHROPIC_API_KEY)
- [ ] Monitor initial runs to ensure proper behavior
🤖 Generated with [Claude Code](https://claude.com/claude-code)
---------
Co-authored-by: Claude Bot <claude-bot@bun.sh>
Co-authored-by: Claude <noreply@anthropic.com>