Claude Code Actionsを使って自動でissueにラベルを付与する

Claude Code Actionsは定額プランでも使用できるのでissueが開かれたら自動でラベルを付与するようにしてみました。

.github/workflows/issue-triage.yml

name: Issue Triage
on:
  issues:
    types: [opened]

jobs:
  triage:
    runs-on: ubuntu-latest
    permissions:
      contents: read
      id-token: write
    steps:
      - name: Checkout code
        uses: actions/checkout@v6
        with:
          fetch-depth: 0

      - name: Setup git identity
        run: |
          git config --global user.email "claude[bot]@users.noreply.github.com"
          git config --global user.name "claude[bot]"

      - name: Get Labels
        id: get_labels
        uses: actions/github-script@v8
        with:
          github-token: ${{ github.token }}
          script: |
            const { data } = await github.rest.issues.listLabelsForRepo({
              owner: context.repo.owner,
              repo: context.repo.repo
            });

            return data.map(label => `${label.name}: ${label.description || 'No description'}`).join('\n');

      - name: Issue Triage with Claude
        id: claude
        uses: anthropics/claude-code-action@v1.0.70
        with:
          prompt: |
            Analyze this issue and determine the appropriate label.

            Available labels:
            ${{ steps.get_labels.outputs.result }}

            Issue #${{ github.event.issue.number }}: ${{ github.event.issue.title }}

            update issue command: gh issue edit ${{ github.event.issue.number }} --add-label "$LABEL"

            ${{ github.event.issue.body }}
          claude_code_oauth_token: ${{ secrets.CLAUDE_CODE_OAUTH_TOKEN }}
          claude_args: "--allowedTools 'Bash(gh issue edit:*)'"