marvin-label-triage.yml

name: Marvin Label Triage
description: Automatically triage GitHub issues and PRs using Marvin
on:
  issues:
    types: [opened]
  pull_request_target:
    types: [opened]
  workflow_dispatch:
    inputs:
      issue_number:
        description: "Issue or PR number to triage"
        required: true
        type: string

concurrency:
  group: triage-${{ github.event.issue.number || github.event.pull_request.number || inputs.issue_number }}
  cancel-in-progress: false

jobs:
  triage-issue:
    runs-on: ubuntu-latest
    timeout-minutes: 10
    permissions:
      contents: read
      issues: write
      pull-requests: write

    steps:
      - name: Checkout base repository
        uses: actions/checkout@v5
        with:
          repository: ${{ github.repository }}
          ref: ${{ github.event.repository.default_branch }}

      - name: Generate Marvin App token
        id: marvin-token
        uses: actions/create-github-app-token@v2
        with:
          app-id: ${{ secrets.MARVIN_APP_ID }}
          private-key: ${{ secrets.MARVIN_APP_PRIVATE_KEY }}

      - name: Create triage prompt
        run: |
          mkdir -p /tmp/claude-prompts
          cat > /tmp/claude-prompts/triage-prompt.txt << 'EOF'
          You're an issue triage assistant for FastMCP, a Python framework for building Model Context Protocol servers and clients. Your task is to analyze issues/PRs and apply appropriate labels.

          IMPORTANT: Your ONLY action should be to apply labels using mcp__github__update_issue. DO NOT post any comments.

          Issue/PR Information:
          - REPO: ${{ github.repository }}
          - NUMBER: ${{ github.event.issue.number || github.event.pull_request.number || inputs.issue_number }}
          - TYPE: ${{ github.event.issue && 'issue' || (github.event.pull_request && 'pull_request') || 'unknown' }}

          TRIAGE PROCESS:

          1. Get available labels:
             Run: `gh label list`

          2. Retrieve issue/PR details using GitHub tools:
             - mcp__github__get_issue: Get the issue/PR details
             - mcp__github__get_issue_comments: Read any discussion
             - If the issue/PR mentions other issues (e.g., "fixes #123", "related to #456"), use mcp__github__get_issue to read those linked issues for additional context

          3. Analyze and apply labels based on these guidelines:

          CORE CATEGORIES (apply EXACTLY ONE - these are mutually exclusive):
          - bug: Reports of broken functionality OR PRs that fix bugs
          - enhancement: New functions/endpoints, improvements to existing features, internal tooling, workflow improvements, minor new capabilities
          - feature: ONLY for major headline functionality worthy of a blog post announcement (2-4 per release, never for issues)
          - documentation: Primary change is to user-facing docs, examples, or guides

          SPECIAL DOCUMENTATION RULES:
          - DO NOT apply "documentation" label if PR only updates auto-generated SDK docs (docs/python-sdk/**)
          - DO apply "documentation" label for significant user-facing documentation changes (guides, examples, API docs)
          - Auto-generated docs updates should get appropriate category label (enhancement, bug, etc.) based on the underlying code changes

          FEATURE vs ENHANCEMENT guidance:
          - feature: Major systems like new auth systems, MCP composition, proxying MCP servers, major CLI commands that transform workflows
          - enhancement: New functions/endpoints, internal workflows, CI improvements, developer tooling, refactoring, utilities, typical new CLI commands
          - If unsure between feature/enhancement, choose enhancement

          Note: If a PR fixes a bug, label it "bug" not "enhancement"

          SPECIAL CATEGORY (can be combined with above):
          - breaking change: Changes that break backward compatibility (in addition to core category)

          PRIORITY (apply if clearly evident):
          - high-priority: Critical bugs affecting many users, security issues, or blocking core functionality
          - low-priority: Edge cases, nice-to-have improvements, or cosmetic issues
          - Default to no priority label if unclear

          STATUS (apply if applicable):
          - needs more info: Issue lacks reproduction steps, error messages, or clear description
          - good first issue: ONLY if it's clearly scoped, has obvious solution, and touches limited files
          - invalid: Spam, completely off-topic, or nonsensical (often LLM-generated)

          AREA LABELS (apply ONLY when thematically central to the issue):
          - cli: Issues primarily about FastMCP CLI commands (run, dev, install)
          - client: Issues primarily about the Client SDK or client-side functionality
          - server: Issues primarily about FastMCP server implementation
          - auth: Authentication is the main concern (Bearer, JWT, OAuth, WorkOS)
          - openapi: OpenAPI integration/parsing is the primary topic
          - http: HTTP transport or networking is the main issue
          - contrib: Specifically about community contributions in src/contrib/
          - tests: Issues primarily about testing infrastructure, CI/CD workflows, or test coverage

          IMPORTANT LABELING RULES:
          - Be selective - only apply labels that are clearly relevant
          - Don't apply area labels just because a file in that area is mentioned
          - The issue must be PRIMARILY about that area to get the label
          - When in doubt, don't apply the label
          - Apply 2-5 labels total typically (category + maybe priority + maybe 1-2 areas)

          META LABELS (rarely needed for issues):
          - dependencies: Only for dependabot PRs or issues specifically about package updates
          - DON'T MERGE: Only if PR author explicitly states it's not ready

          4. Apply selected labels:
             Use mcp__github__update_issue to apply your selected labels
             DO NOT post any comments
          EOF

      - name: Setup GitHub MCP Server
        run: |
          mkdir -p /tmp/mcp-config
          cat > /tmp/mcp-config/mcp-servers.json << 'EOF'
          {
            "mcpServers": {
              "github": {
                "command": "docker",
                "args": [
                  "run",
                  "-i",
                  "--rm",
                  "-e",
                  "GITHUB_PERSONAL_ACCESS_TOKEN",
                  "ghcr.io/github/github-mcp-server:sha-7aced2b"
                ],
                "env": {
                  "GITHUB_PERSONAL_ACCESS_TOKEN": "${{ steps.marvin-token.outputs.token }}"
                }
              }
            }
          }
          EOF

      - name: Run Marvin for Issue Triage
        uses: anthropics/claude-code-base-action@beta
        with:
          prompt_file: /tmp/claude-prompts/triage-prompt.txt
          allowed_tools: "Bash(gh label list),mcp__github__get_issue,mcp__github__get_issue_comments,mcp__github__update_issue,mcp__github__get_pull_request_files"
          timeout_minutes: "5"
          anthropic_api_key: ${{ secrets.ANTHROPIC_API_KEY_FOR_CI }}
          mcp_config: /tmp/mcp-config/mcp-servers.json
          claude_env: |
            GH_TOKEN: ${{ steps.marvin-token.outputs.token }}