chore: import upstream snapshot with attribution

Sources/ContainerCommands/Network/NetworkInspect.swift

@@ -0,0 +1,53 @@
+//===----------------------------------------------------------------------===//
+// Copyright © 2025-2026 Apple Inc. and the container project authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//   https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//===----------------------------------------------------------------------===//
+
+import ArgumentParser
+import ContainerAPIClient
+import ContainerizationError
+import Foundation
+
+extension Application {
+    public struct NetworkInspect: AsyncLoggableCommand {
+        public static let configuration = CommandConfiguration(
+            commandName: "inspect",
+            abstract: "Display information about one or more networks")
+
+        @Argument(help: "Networks to inspect")
+        var networks: [String]
+
+        @OptionGroup
+        public var logOptions: Flags.Logging
+
+        public init() {}
+
+        public func run() async throws {
+            let networkClient = NetworkClient()
+            let uniqueNames = Set(networks)
+            let items = try await networkClient.list().filter { uniqueNames.contains($0.id) }
+
+            if items.count != uniqueNames.count {
+                let found = Set(items.map { $0.id })
+                let missing = uniqueNames.subtracting(found).sorted()
+                throw ContainerizationError(
+                    .notFound,
+                    message: "network not found: \(missing.joined(separator: ", "))"
+                )
+            }
+
+            try Output.emit(Output.renderJSON(items, options: .pretty))
+        }
+    }
+}