This PR adds a dedicated GitHub Actions workflow to automatically approve pull requests created by the GitHub Copilot SWE agent.

Changes Made

• Created .github/workflows/auto_approve_copilot.yaml with the following functionality:
  • Triggers on PR opened and synchronize events
  • Only runs when github.actor == 'copilot-swe-agent' for security
  • Uses hmarr/auto-approve-action@v3 for reliable auto-approval
  • Leverages GITHUB_TOKEN for authentication

Benefits

• Streamlined workflow: Reduces manual intervention for agent-created PRs
• Security focused: Only auto-approves PRs from the specific Copilot agent
• Reliable automation: Uses well-maintained action for consistent behavior

Workflow Structure

name: Auto-approve Copilot PRs

on:
  pull_request:
    types: [opened, synchronize]

jobs:
  auto-approve:
    runs-on: ubuntu-latest
    if: github.actor == 'copilot-swe-agent'
    steps:
      - name: Auto-approve PR from Copilot agent
        uses: hmarr/auto-approve-action@v3
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}

The workflow follows the same structure and conventions as existing workflows in the repository and has been validated for proper YAML syntax.

Fixes #231.

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