sglang/.github/workflows/ci-auto-bisect.yml

name: CI Auto Bisect

on:
  workflow_run:
    workflows: ["PR Test"]
    types: [completed]
    branches: [main]
  workflow_dispatch: {}

concurrency:
  group: ci-auto-bisect
  cancel-in-progress: true

permissions:
  contents: read
  actions: read

jobs:
  auto-bisect:
    # Only run for scheduled pr-test completions (not PR-triggered), or manual dispatch
    if: >
      github.repository == 'sgl-project/sglang' && (
        github.event_name == 'workflow_dispatch' ||
        (github.event.workflow_run.event == 'schedule' &&
         github.event.workflow_run.conclusion != 'cancelled')
      )
    runs-on: ubuntu-latest
    timeout-minutes: 30
    steps:
      - name: Checkout code
        uses: actions/checkout@v4
        with:
          fetch-depth: 0  # Full history needed for git log between SHAs

      - name: Set up Python
        uses: actions/setup-python@v5
        with:
          python-version: '3.14'

      - name: Install dependencies
        run: |
          python -m pip install --upgrade pip
          pip install requests anthropic

      - name: Run Auto Bisect
        id: bisect
        env:
          GITHUB_TOKEN: ${{ secrets.GH_PAT_FOR_NIGHTLY_CI_DATA }}
          ANTHROPIC_API_KEY: ${{ secrets.ANTHROPIC_API_KEY }}
          PYTHONUNBUFFERED: 1
          PYTHONIOENCODING: utf-8
        run: |
          cd scripts/ci_monitor
          python ci_auto_bisect.py \
            --github-token $GITHUB_TOKEN \
            --anthropic-api-key $ANTHROPIC_API_KEY \
            --output bisect_results.json \
            --max-failures 10

      - name: Upload Bisect Results
        if: always() && hashFiles('scripts/ci_monitor/bisect_results.json') != ''
        uses: actions/upload-artifact@v4
        with:
          name: ci-auto-bisect-${{ github.run_number }}
          path: scripts/ci_monitor/bisect_results.json
          retention-days: 14

      - name: Post to Slack
        if: always()
        env:
          SGLANG_DIFFUSION_SLACK_TOKEN: ${{ secrets.SGLANG_DIFFUSION_SLACK_TOKEN }}
        run: |
          cd scripts/ci_monitor

          # Report if the bisect step itself failed
          if [ "${{ steps.bisect.outcome }}" = "failure" ]; then
            echo "::error::Auto bisect analysis failed - check logs above"
          fi

          if [ -f bisect_results.json ] && [ -n "$SGLANG_DIFFUSION_SLACK_TOKEN" ]; then
            pip install slack_sdk
            python3 post_bisect_to_slack.py --report-file bisect_results.json
          else
            echo "Bisect results or Slack token not available, skipping notification"
          fi