DevOps Helper MCP

Instructions

Implementation Reference

• src/index.js:456-502 (handler)

  The complete implementation of the 'ghcr_login_guide' tool, including registration to the MCP server, input schema (github_username), and the handler function that returns a detailed text guide for authenticating with GitHub Container Registry (GHCR). The handler provides step-by-step instructions for creating PATs, logging in via Docker CLI, and using in GitHub Actions.

    "ghcr_login_guide",
    "Guide through GHCR authentication",
    { github_username: { type: "string", description: "Your GitHub username" } },
    async ({ github_username }) => {
      return {
        content: [{
          type: "text",
          text: `GITHUB CONTAINER REGISTRY (GHCR) LOGIN GUIDE
  
  Step 1: Create a Personal Access Token (PAT)
  --------------------------------------------
  1. Go to: https://github.com/settings/tokens/new
  2. Give it a name like "GHCR Push Token"
  3. Select scopes:
     [x] write:packages
     [x] read:packages
     [x] delete:packages (optional)
  4. Click "Generate token"
  5. COPY THE TOKEN NOW (you won't see it again!)
  
  Step 2: Login to GHCR
  ---------------------
  Option A - Interactive (paste token when prompted):
    docker login ghcr.io -u ${github_username}
  
  Option B - Using environment variable:
    export CR_PAT=your_token_here
    echo $CR_PAT | docker login ghcr.io -u ${github_username} --password-stdin
  
  Step 3: Verify Login
  --------------------
    docker pull ghcr.io/github/super-linter:latest
    (If this works, you're logged in!)
  
  FOR CI/CD (GitHub Actions):
  ---------------------------
  Use the built-in GITHUB_TOKEN:
    - name: Login to GHCR
      uses: docker/login-action@v3
      with:
        registry: ghcr.io
        username: \${{ github.actor }}
        password: \${{ secrets.GITHUB_TOKEN }}`
        }]
      };
    }
  );

• src/index.js:456-502 (registration)

  MCP server.tool() call that registers the 'ghcr_login_guide' tool with name, description, schema, and handler.

    "ghcr_login_guide",
    "Guide through GHCR authentication",
    { github_username: { type: "string", description: "Your GitHub username" } },
    async ({ github_username }) => {
      return {
        content: [{
          type: "text",
          text: `GITHUB CONTAINER REGISTRY (GHCR) LOGIN GUIDE
  
  Step 1: Create a Personal Access Token (PAT)
  --------------------------------------------
  1. Go to: https://github.com/settings/tokens/new
  2. Give it a name like "GHCR Push Token"
  3. Select scopes:
     [x] write:packages
     [x] read:packages
     [x] delete:packages (optional)
  4. Click "Generate token"
  5. COPY THE TOKEN NOW (you won't see it again!)
  
  Step 2: Login to GHCR
  ---------------------
  Option A - Interactive (paste token when prompted):
    docker login ghcr.io -u ${github_username}
  
  Option B - Using environment variable:
    export CR_PAT=your_token_here
    echo $CR_PAT | docker login ghcr.io -u ${github_username} --password-stdin
  
  Step 3: Verify Login
  --------------------
    docker pull ghcr.io/github/super-linter:latest
    (If this works, you're logged in!)
  
  FOR CI/CD (GitHub Actions):
  ---------------------------
  Use the built-in GITHUB_TOKEN:
    - name: Login to GHCR
      uses: docker/login-action@v3
      with:
        registry: ghcr.io
        username: \${{ github.actor }}
        password: \${{ secrets.GITHUB_TOKEN }}`
        }]
      };
    }
  );

• src/index.js:458-458 (schema)

  Input schema for the ghcr_login_guide tool, requiring an optional github_username parameter.

  { github_username: { type: "string", description: "Your GitHub username" } },