A team configures a matrix workflow so each agent role writes a separate audit file. The team also wants an index artifact that can still be created when one agent role fails. Evaluate the following statements. 1. The matrix job can create one run-scoped artifact per agent role. 2. The index job downloads the role artifacts before creating the index. 3. The index job can run even if one matrix role fails.

name: multi-agent-observe

on:
  pull_request:
    branches:
      - main

permissions:
  contents: read
  actions: read
  pull-requests: read

jobs:
  agent:
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix:
         agent: [planner, implementer, reviewer]
    steps:
      - uses: actions/checkout@v4

         - name: Run agent role
           run: |
             mkdir -p audit
             ./agents/run-${{ matrix.agent }}.sh > audit/${{ matrix.agent }}.json

         - name: Upload role audit
           if: ${{ always() }}
           uses: actions/upload-artifact@v4
           with:
             name: agent-${{ matrix.agent }}-audit-${{ github.run_id }}
             path: audit/${{ matrix.agent }}.json
             retention-days: 30

   audit-index:
     needs: agent
     if: ${{ always() }}
     runs-on: ubuntu-latest
     steps:
       - name: Create index
         run: |
            mkdir -p audit
            echo "run=${{ github.run_id }}" > audit/index.md
            echo "source=matrix agent artifacts" >> audit/index.md

         - name: Upload index
           uses: actions/upload-artifact@v4
           with:
             name: audit-index-${{ github.run_id }}
             path: audit/index.md
             retention-days: 30