[Nitro CLI] Add MCP commands

[glen-84]

Summary of the changes (Less than 80 chars)

• [Nitro CLI] Add MCP commands.

[Copilot]

Pull request overview

This PR adds comprehensive MCP (Model Context Protocol) Feature Collection support to the Nitro CLI, following the same pattern as the existing OpenAPI collection commands.

Changes:

• Added MCP command infrastructure with create, delete, list, upload, publish, and validate subcommands
• Updated GraphQL schema with MCP-related types, mutations, and subscriptions
• Added validation error handling and display logic for MCP feature collections

Reviewed changes

Copilot reviewed 29 out of 31 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
schema.graphql	Added MCP types and updated existing types to support MCP validation errors
operations.json	Added persisted GraphQL operations for all new MCP commands
fragments.graphql	Added validation error fragments for MCP feature collections
ThrowHelper.cs	Added error helper for MCP selection
JsonSourceGenerationContext.cs	Added JSON serialization support for MCP types
Nitro.CommandLine.csproj	Added project references for MCP adapters
ConsoleHelpers.cs	Added error display logic for MCP validation errors
NitroCloudCommandExtensions.cs	Registered new MCP command
Commands/Mcp/*.cs	Implemented all MCP command handlers (create, delete, list, upload, publish, validate)
Commands/Mcp/Options/*.cs	Defined command-line options for MCP commands
Commands/Mcp/Component/*.cs	Created reusable components for MCP prompts and helpers

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[Copilot]

Pull request overview

Copilot reviewed 29 out of 31 changed files in this pull request and generated 8 comments.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[github-actions]

🚀 Fusion Gateway Performance Results

Simple Composite Query

Constant Load (50 VUs)

Requests/sec	Error Rate
5825.60 req/s	0.00%

📊 Response Time Metrics

Min	Med	Max	Avg	P90	P95
0.82ms	7.15ms	164.40ms	8.43ms	12.96ms	18.77ms

Ramping Load (0→50→500→50 VUs)

Requests/sec	Error Rate
4628.93 req/s	0.00%

📊 Response Time Metrics

Min	Med	Max	Avg	P90	P95
0.75ms	37.62ms	266.52ms	47.99ms	107.69ms	124.18ms

Executed Query

fragment User on User {
  id
  username
  name
}

fragment Review on Review {
  id
  body
}

fragment Product on Product {
  inStock
  name
  price
  shippingEstimate
  upc
  weight
}

query TestQuery {
  topProducts(first: 5) {
    ...Product
    reviews {
      ...Review
      author {
        ...User
      }
    }
  }
}

Deep Recursion Query

Constant Load (50 VUs)

Requests/sec	Error Rate
270.68 req/s	0.00%

📊 Response Time Metrics

Min	Med	Max	Avg	P90	P95
12.51ms	173.83ms	575.79ms	179.12ms	225.32ms	248.62ms

Ramping Load (0→50→500→50 VUs)

Requests/sec	Error Rate
306.25 req/s	0.00%

📊 Response Time Metrics

Min	Med	Max	Avg	P90	P95
3.12ms	672.57ms	1724.99ms	692.18ms	1381.65ms	1475.69ms

Executed Query

fragment User on User {
  id
  username
  name
}

fragment Review on Review {
  id
  body
}

fragment Product on Product {
  inStock
  name
  price
  shippingEstimate
  upc
  weight
}

query TestQuery {
  users {
    ...User
    reviews {
      ...Review
      product {
        ...Product
        reviews {
          ...Review
          author {
            ...User
            reviews {
              ...Review
              product {
                ...Product
              }
            }
          }
        }
      }
    }
  }
  topProducts(first: 5) {
    ...Product
    reviews {
      ...Review
      author {
        ...User
        reviews {
          ...Review
          product {
            ...Product
          }
        }
      }
    }
  }
}

Variable Batching Throughput

Constant Load (50 VUs)

Requests/sec	Error Rate
23752.82 req/s	0.00%

📊 Response Time Metrics

Min	Med	Max	Avg	P90	P95
0.09ms	1.69ms	40.94ms	2.06ms	3.90ms	4.79ms

Ramping Load (0→50→500→50 VUs)

Requests/sec	Error Rate
18820.08 req/s	0.00%

📊 Response Time Metrics

Min	Med	Max	Avg	P90	P95
0.09ms	9.11ms	110.48ms	11.20ms	23.26ms	28.01ms

Executed Query

query TestQuery_8f7a46ce_2(
  $__fusion_1_upc: ID!
  $__fusion_2_price: Long!
  $__fusion_2_weight: Long!
) {
  productByUpc(upc: $__fusion_1_upc) {
    inStock
    shippingEstimate(weight: $__fusion_2_weight, price: $__fusion_2_price)
  }
}

Variables (5 sets batched in single request)

[
  { "__fusion_1_upc": "1", "__fusion_2_price": 899, "__fusion_2_weight": 100 },
  { "__fusion_1_upc": "2", "__fusion_2_price": 1299, "__fusion_2_weight": 1000 },
  { "__fusion_1_upc": "3", "__fusion_2_price": 15, "__fusion_2_weight": 20 },
  { "__fusion_1_upc": "4", "__fusion_2_price": 499, "__fusion_2_weight": 100 },
  { "__fusion_1_upc": "5", "__fusion_2_price": 1299, "__fusion_2_weight": 1000 }
]

No baseline data available for comparison.

---

Run 21714276287 • Commit e4d44f2 • Thu, 05 Feb 2026 14:39:03 GMT

[github-actions]

🚀 Fusion Gateway Performance Results

Simple Composite Query

Constant Load (50 VUs)

Requests/sec	Error Rate
5766.60 req/s	0.00%

📊 Response Time Metrics

Min	Med	Max	Avg	P90	P95
0.84ms	7.19ms	161.86ms	8.52ms	13.08ms	18.72ms

Ramping Load (0→50→500→50 VUs)

Requests/sec	Error Rate
4606.95 req/s	0.00%

📊 Response Time Metrics

Min	Med	Max	Avg	P90	P95
0.80ms	39.78ms	240.87ms	48.13ms	105.55ms	123.68ms

Executed Query

fragment User on User {
  id
  username
  name
}

fragment Review on Review {
  id
  body
}

fragment Product on Product {
  inStock
  name
  price
  shippingEstimate
  upc
  weight
}

query TestQuery {
  topProducts(first: 5) {
    ...Product
    reviews {
      ...Review
      author {
        ...User
      }
    }
  }
}

Deep Recursion Query

Constant Load (50 VUs)

Requests/sec	Error Rate
271.04 req/s	0.00%

📊 Response Time Metrics

Min	Med	Max	Avg	P90	P95
12.81ms	174.07ms	766.12ms	178.77ms	223.69ms	243.78ms

Ramping Load (0→50→500→50 VUs)

Requests/sec	Error Rate
304.10 req/s	0.00%

📊 Response Time Metrics

Min	Med	Max	Avg	P90	P95
2.98ms	688.27ms	1715.63ms	695.69ms	1388.06ms	1501.01ms

Executed Query

fragment User on User {
  id
  username
  name
}

fragment Review on Review {
  id
  body
}

fragment Product on Product {
  inStock
  name
  price
  shippingEstimate
  upc
  weight
}

query TestQuery {
  users {
    ...User
    reviews {
      ...Review
      product {
        ...Product
        reviews {
          ...Review
          author {
            ...User
            reviews {
              ...Review
              product {
                ...Product
              }
            }
          }
        }
      }
    }
  }
  topProducts(first: 5) {
    ...Product
    reviews {
      ...Review
      author {
        ...User
        reviews {
          ...Review
          product {
            ...Product
          }
        }
      }
    }
  }
}

Variable Batching Throughput

Constant Load (50 VUs)

Requests/sec	Error Rate
24086.27 req/s	0.00%

📊 Response Time Metrics

Min	Med	Max	Avg	P90	P95
0.09ms	1.67ms	40.40ms	2.03ms	3.86ms	4.73ms

Ramping Load (0→50→500→50 VUs)

Requests/sec	Error Rate
18809.04 req/s	0.00%

📊 Response Time Metrics

Min	Med	Max	Avg	P90	P95
0.09ms	9.20ms	104.34ms	11.24ms	23.18ms	27.85ms

Executed Query

query TestQuery_8f7a46ce_2(
  $__fusion_1_upc: ID!
  $__fusion_2_price: Long!
  $__fusion_2_weight: Long!
) {
  productByUpc(upc: $__fusion_1_upc) {
    inStock
    shippingEstimate(weight: $__fusion_2_weight, price: $__fusion_2_price)
  }
}

Variables (5 sets batched in single request)

[
  { "__fusion_1_upc": "1", "__fusion_2_price": 899, "__fusion_2_weight": 100 },
  { "__fusion_1_upc": "2", "__fusion_2_price": 1299, "__fusion_2_weight": 1000 },
  { "__fusion_1_upc": "3", "__fusion_2_price": 15, "__fusion_2_weight": 20 },
  { "__fusion_1_upc": "4", "__fusion_2_price": 499, "__fusion_2_weight": 100 },
  { "__fusion_1_upc": "5", "__fusion_2_price": 1299, "__fusion_2_weight": 1000 }
]

No baseline data available for comparison.

---

Run 21745958263 • Commit 7ff93de • Fri, 06 Feb 2026 10:00:24 GMT