Add draft PR cleanup automation policy

[github-actions]

Problem

Analysis of recent PR activity (Jan 24-28) shows 25 draft PRs (9.6% of total 260 PRs) remain open, with some potentially abandoned work-in-progress items. This creates clutter in the PR list and makes triage more difficult.

Proposed Solution

Implement automated cleanup policy for stale draft PRs:

1. Warning phase (10 days of inactivity):

   • Post comment: "This draft PR has been inactive for 10 days and will be auto-closed in 4 days unless updated"
   • Label: stale-draft

2. Cleanup phase (14 days of inactivity):

   • Auto-close with comment: "Closing inactive draft PR. Feel free to reopen if work continues."
   • Keep stale-draft label for tracking

3. Exemptions:

   • PRs with keep-draft label
   • PRs marked as blocked or awaiting-review
   • PRs with activity in last 10 days

Implementation

Create workflow: .github/workflows/draft-pr-cleanup.md

---
engine: copilot
on:
  schedule:
    - cron: '0 2 * * *'  # Daily at 2 AM UTC
safe-outputs:
  max:
    issues: 0
    pull_requests: 0
    comments: 20  # Up to 20 stale draft warnings/closes per run
---

Review all open draft PRs and:
1. Identify drafts with >10 days of inactivity (no commits, comments, or label changes)
2. For drafts inactive 10-13 days: Add warning comment and `stale-draft` label
3. For drafts inactive >14 days: Close with cleanup comment (unless exempted)
4. Exempt PRs with `keep-draft`, `blocked`, or `awaiting-review` labels

Use GitHub MCP tools to query drafts, check activity, and post comments.

Success Metrics

• Draft PR rate drops from 9.6% to <5%
• Faster PR triage (less clutter)
• Clear communication to PR authors
• Exemption system prevents premature closure

Context

• Current draft PRs: 25 (out of 260 recent PRs)
• Estimated abandoned drafts: 10-15
• Impact on ecosystem: Minor but improves maintainability
• Priority: P2 (this week)

Related

Agent Performance Report - Week of January 24-28, 2026

AI generated by Agent Performance Analyzer - Meta-Orchestrator