amedee.be - CI/CD

🧹 Tidying Up After Myself: Automatically Deleting Old GitHub Issues

3 September 202519 July 2025

At some point, I had to admit it: I’ve turned GitHub Issues into a glorified chart gallery.

Let me explain.

Over on my amedee/ansible-servers repository, I have a workflow called workflow-metrics.yml, which runs after every pipeline. It uses yykamei/github-workflows-metrics to generate beautiful charts that show how long my CI pipeline takes to run. Those charts are then posted into a GitHub Issue—one per run.

It’s neat. It’s visual. It’s entirely unnecessary to keep them forever.

The thing is: every time the workflow runs, it creates a new issue and closes the old one. So naturally, I end up with a long, trailing graveyard of “CI Metrics” issues that serve no purpose once they’re a few weeks old.

Cue the digital broom. 🧹

Enter `cleanup-closed-issues.yml`

To avoid hoarding useless closed issues like some kind of GitHub raccoon, I created a scheduled workflow that runs every Monday at 3:00 AM UTC and deletes the cruft:

schedule:
  - cron: '0 3 * * 1' # Every Monday at 03:00 UTC

This workflow:

Keeps at least 6 closed issues (just in case I want to peek at recent metrics).
Keeps issues that were closed less than 30 days ago.
Deletes everything else—quietly, efficiently, and without breaking a sweat.

It’s also configurable when triggered manually, with inputs for dry_run, days_to_keep, and min_issues_to_keep. So I can preview deletions before committing them, or tweak the retention period as needed.

📂 Complete Source Code for the Cleanup Workflow

name: 🧹 Cleanup Closed Issues

on:
  schedule:
    - cron: '0 3 * * 1' # Runs every Monday at 03:00 UTC
  workflow_dispatch:
    inputs:
      dry_run:
        description: "Enable dry run mode (preview deletions, no actual delete)"
        required: false
        default: "false"
        type: choice
        options:
          - "true"
          - "false"
      days_to_keep:
        description: "Number of days to retain closed issues"
        required: false
        default: "30"
        type: string
      min_issues_to_keep:
        description: "Minimum number of closed issues to keep"
        required: false
        default: "6"
        type: string

concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true

permissions:
  issues: write

jobs:
  cleanup:
    runs-on: ubuntu-latest

    steps:
      - name: Install GitHub CLI
        run: sudo apt-get install --yes gh

      - name: Delete old closed issues
        env:
          GH_TOKEN: ${{ secrets.GH_FINEGRAINED_PAT }}
          DRY_RUN: ${{ github.event.inputs.dry_run || 'false' }}
          DAYS_TO_KEEP: ${{ github.event.inputs.days_to_keep || '30' }}
          MIN_ISSUES_TO_KEEP: ${{ github.event.inputs.min_issues_to_keep || '6' }}
          REPO: ${{ github.repository }}
        run: |
          NOW=$(date -u +%s)
          THRESHOLD_DATE=$(date -u -d "${DAYS_TO_KEEP} days ago" +%s)
          echo "Only consider issues older than ${THRESHOLD_DATE}"

          echo "::group::Checking GitHub API Rate Limits..."
          RATE_LIMIT=$(gh api /rate_limit --jq '.rate.remaining')
          echo "Remaining API requests: ${RATE_LIMIT}"
          if [[ "${RATE_LIMIT}" -lt 10 ]]; then
            echo "⚠️ Low API limit detected. Sleeping for a while..."
            sleep 60
          fi
          echo "::endgroup::"

          echo "Fetching ALL closed issues from ${REPO}..."
          CLOSED_ISSUES=$(gh issue list --repo "${REPO}" --state closed --limit 1000 --json number,closedAt)

          if [ "${CLOSED_ISSUES}" = "[]" ]; then
            echo "✅ No closed issues found. Exiting."
            exit 0
          fi

          ISSUES_TO_DELETE=$(echo "${CLOSED_ISSUES}" | jq -r \
            --argjson now "${NOW}" \
            --argjson limit "${MIN_ISSUES_TO_KEEP}" \
            --argjson threshold "${THRESHOLD_DATE}" '
              .[:-(if length < $limit then 0 else $limit end)]
              | map(select(
                  (.closedAt | type == "string") and
                  ((.closedAt | fromdateiso8601) < $threshold)
                ))
              | .[].number
            ' || echo "")

          if [ -z "${ISSUES_TO_DELETE}" ]; then
            echo "✅ No issues to delete. Exiting."
            exit 0
          fi

          echo "::group::Issues to delete:"
          echo "${ISSUES_TO_DELETE}"
          echo "::endgroup::"

          if [ "${DRY_RUN}" = "true" ]; then
            echo "🛑 DRY RUN ENABLED: Issues will NOT be deleted."
            exit 0
          fi

          echo "⏳ Deleting issues..."
          echo "${ISSUES_TO_DELETE}" \
            | xargs -I {} -P 5 gh issue delete "{}" --repo "${REPO}" --yes

          DELETED_COUNT=$(echo "${ISSUES_TO_DELETE}" | wc -l)
          REMAINING_ISSUES=$(gh issue list --repo "${REPO}" --state closed --limit 100 | wc -l)

          echo "::group::✅ Issue cleanup completed!"
          echo "📌 Deleted Issues: ${DELETED_COUNT}"
          echo "📌 Remaining Closed Issues: ${REMAINING_ISSUES}"
          echo "::endgroup::"

          {
            echo "### 🗑️ GitHub Issue Cleanup Summary"
            echo "- **Deleted Issues**: ${DELETED_COUNT}"
            echo "- **Remaining Closed Issues**: ${REMAINING_ISSUES}"
          } >> "$GITHUB_STEP_SUMMARY"

🛠️ Technical Design Choices Behind the Cleanup Workflow

Cleaning up old GitHub issues may seem trivial, but doing it well requires a few careful decisions. Here’s why I built the workflow the way I did:

Why GitHub CLI (`gh`)?

While I could have used raw REST API calls or GraphQL, the GitHub CLI (gh) provides a nice balance of power and simplicity:

It handles authentication and pagination under the hood.
Supports JSON output and filtering directly with --json and --jq.
Provides convenient commands like gh issue list and gh issue delete that make the script readable.
Comes pre-installed on GitHub runners or can be installed easily.

Example fetching closed issues:

gh issue list --repo "$REPO" --state closed --limit 1000 --json number,closedAt

No messy headers or tokens, just straightforward commands.

Filtering with `jq`

I use jq to:

Retain a minimum number of issues to keep (min_issues_to_keep).
Keep issues closed more recently than the retention period (days_to_keep).
Parse and compare issue closed timestamps with precision.
Exclude pull requests from deletion by checking the presence of the pull_request field.

The jq filter looks like this:

jq -r --argjson now "$NOW" --argjson limit "$MIN_ISSUES_TO_KEEP" --argjson threshold "$THRESHOLD_DATE" '
  .[:-(if length < $limit then 0 else $limit end)]
  | map(select(
      (.closedAt | type == "string") and
      ((.closedAt | fromdateiso8601) < $threshold)
    ))
  | .[].number
'

Secure Authentication with Fine-Grained PAT

Because deleting issues is a destructive operation, the workflow uses a Fine-Grained Personal Access Token (PAT) with the narrowest possible scopes:

Issues: Read and Write
Limited to the repository in question

The token is securely stored as a GitHub Secret (GH_FINEGRAINED_PAT).

Note: Pull requests are not deleted because they are filtered out and the CLI won’t delete PRs via the issues API.

Dry Run for Safety

Before deleting anything, I can run the workflow in dry_run mode to preview what would be deleted:

inputs:
  dry_run:
    description: "Enable dry run mode (preview deletions, no actual delete)"
    default: "false"

This lets me double-check without risking accidental data loss.

Parallel Deletion

Deletion happens in parallel to speed things up:

echo "$ISSUES_TO_DELETE" | xargs -I {} -P 5 gh issue delete "{}" --repo "$REPO" --yes

Up to 5 deletions run concurrently — handy when cleaning dozens of old issues.

User-Friendly Output

The workflow uses GitHub Actions’ logging groups and step summaries to give a clean, collapsible UI:

echo "::group::Issues to delete:"
echo "$ISSUES_TO_DELETE"
echo "::endgroup::"

And a markdown summary is generated for quick reference in the Actions UI.

Why Bother?

I’m not deleting old issues because of disk space or API limits — GitHub doesn’t charge for that. It’s about:

Reducing clutter so my issue list stays manageable.
Making it easier to find recent, relevant information.
Automating maintenance to free my brain for other things.
Keeping my tooling neat and tidy, which is its own kind of joy.

Steal It, Adapt It, Use It

If you’re generating temporary issues or ephemeral data in GitHub Issues, consider using a cleanup workflow like this one.

It’s simple, secure, and effective.

Because sometimes, good housekeeping is the best feature.

🧼✨ Happy coding (and cleaning)!

CI/CD