Add workflow to auto-dismiss owner from Copilot PRs and enable auto-merge

[Copilot]

Copilot PRs automatically assign the repository owner as reviewer despite Copilot code review being enabled via rulesets. This creates unnecessary overhead and prevents automatic merging.

Changes

• Created .github/workflows/auto-dismiss-reviewer.yml
  • Triggers on PR open and review requests from copilot-swe-agent[bot]
  • Removes GhostwheeI from reviewers
  • Requests Copilot review via @copilot review comment
  • Enables auto-merge (squash) once checks pass
  • Explicit permissions: pull-requests: write, contents: read

Workflow behavior

on:
  pull_request:
    types: [opened, review_requested]

jobs:
  dismiss-reviewer:
    if: github.actor == 'copilot-swe-agent[bot]'
    permissions:
      pull-requests: write
      contents: read

Prerequisites

Repository settings must have "Allow auto-merge" enabled (Settings → General → Allow auto-merge).

Original prompt

Problem

When the Copilot coding agent creates pull requests, it automatically assigns the repository owner (GhostwheeI) as a reviewer. This is unnecessary overhead since Copilot code review is already enabled via rulesets. Additionally, PRs should auto-merge once all checks pass.

Solution

Create a GitHub Actions workflow that:

1. Triggers when a PR is opened or a review is requested
2. Only runs for PRs created by copilot-swe-agent[bot]
3. Removes GhostwheeI from the reviewers list
4. Requests Copilot code review by commenting @copilot review
5. Enables auto-merge (squash) so the PR merges automatically once all checks pass

Implementation

Create the file .github/workflows/auto-dismiss-reviewer.yml with the following content:

name: Auto-dismiss owner from Copilot PRs

on:
  pull_request:
    types: [opened, review_requested]

jobs:
  dismiss-reviewer:
    runs-on: ubuntu-latest
    if: github.actor == 'copilot-swe-agent[bot]'
    steps:
      - name: Remove owner and request Copilot review
        uses: actions/github-script@v7
        with:
          script: |
            const owner = context.repo.owner;
            const repo = context.repo.repo;
            const pull_number = context.payload.pull_request.number;
            
            // Remove GhostwheeI as reviewer
            try {
              await github.rest.pulls.removeRequestedReviewers({
                owner,
                repo,
                pull_number,
                reviewers: ['GhostwheeI']
              });
              console.log(`Removed GhostwheeI from reviewers on PR #${pull_number}`);
            } catch (e) {
              console.log(`Could not remove reviewer: ${e.message}`);
            }
            
            // Request Copilot code review
            await github.rest.issues.createComment({
              owner,
              repo,
              issue_number: pull_number,
              body: '@copilot review'
            });
            console.log(`Requested Copilot review on PR #${pull_number}`);
            
            // Enable auto-merge (squash)
            try {
              await github.graphql(`
                mutation($pullRequestId: ID!) {
                  enablePullRequestAutoMerge(input: {
                    pullRequestId: $pullRequestId,
                    mergeMethod: SQUASH
                  }) {
                    pullRequest {
                      autoMergeRequest {
                        enabledAt
                      }
                    }
                  }
                }
              `, {
                pullRequestId: context.payload.pull_request.node_id
              });
              console.log(`Enabled auto-merge on PR #${pull_number}`);
            } catch (e) {
              console.log(`Could not enable auto-merge: ${e.message}`);
            }

Note

Make sure "Allow auto-merge" is enabled in repository settings (Settings → General → Allow auto-merge) for the auto-merge feature to work.

This pull request was created from Copilot chat.

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