name: Claude Code

on:
  issue_comment:
    types: [created]
  pull_request_review_comment:
    types: [created]
  issues:
    types: [opened, assigned]
  pull_request_review:
    types: [submitted]

jobs:
  claude:
    if: |
      (github.event_name == 'issue_comment' && contains(github.event.comment.body, '@claude')) ||
      (github.event_name == 'pull_request_review_comment' && contains(github.event.comment.body, '@claude')) ||
      (github.event_name == 'pull_request_review' && contains(github.event.review.body, '@claude')) ||
      (github.event_name == 'issues' && (contains(github.event.issue.body, '@claude') || contains(github.event.issue.title, '@claude')))
    runs-on: ubuntu-latest
    permissions:
      contents: read
      pull-requests: read
      issues: read
      id-token: write
      actions: read
    steps:
      # Only allow modelcontextprotocol org members to trigger @claude
      # This enables @claude to work on external fork PRs when triggered by org members
      # Members list is fetched from modelcontextprotocol/access repo
      - name: Check if org member
        run: |
          ACTOR="${{ github.triggering_actor }}"
          USERS_URL="https://raw.githubusercontent.com/modelcontextprotocol/access/main/src/config/users.ts"

          # Fetch users.ts and extract GitHub usernames
          MEMBERS=$(curl -fsSL "$USERS_URL" | grep -oE 'github:\s*"[^"]+"' | sed 's/github:\s*"//;s/"$//')

          if echo "$MEMBERS" | grep -qxF "$ACTOR"; then
            echo "User $ACTOR is a member of modelcontextprotocol org"
          else
            echo "::error::User $ACTOR is not a member of the modelcontextprotocol org. Only org members can trigger @claude."
            exit 1
          fi

      # For PR comments, get PR details to checkout the correct branch (including forks)
      - name: Get PR details
        id: pr
        if: github.event.issue.pull_request
        env:
          GH_TOKEN: ${{ github.token }}
        run: |
          PR_DATA=$(gh api ${{ github.event.issue.pull_request.url }})
          echo "number=$(echo "$PR_DATA" | jq -r '.number')" >> $GITHUB_OUTPUT
          echo "head_ref=$(echo "$PR_DATA" | jq -r '.head.ref')" >> $GITHUB_OUTPUT
          echo "head_repo=$(echo "$PR_DATA" | jq -r '.head.repo.full_name')" >> $GITHUB_OUTPUT
          echo "is_fork=$(echo "$PR_DATA" | jq -r '.head.repo.fork')" >> $GITHUB_OUTPUT

      - name: Checkout repository
        uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8
        with:
          fetch-depth: 1
          # For fork PRs, checkout via PR ref; otherwise use the branch directly
          ref: ${{ steps.pr.outputs.is_fork == 'true' && format('refs/pull/{0}/head', steps.pr.outputs.number) || steps.pr.outputs.head_ref || github.ref }}

      - name: Run Claude Code
        id: claude
        uses: anthropics/claude-code-action@v1
        with:
          anthropic_api_key: ${{ secrets.ANTHROPIC_API_KEY }}

          # Allow Claude to read CI results on PRs
          additional_permissions: |
            actions: read

          # Trigger when assigned to an issue
          assignee_trigger: "claude"

          claude_args: |
            --allowedTools Bash
            --system-prompt "If posting a comment to GitHub, give a concise summary of the comment at the top and put all the details in a <details> block."