diff --git a/extensions/configuration-editing/schemas/devContainer.schema.generated.json b/extensions/configuration-editing/schemas/devContainer.schema.generated.json
index 9f78ff881ae..d47f1192400 100644
--- a/extensions/configuration-editing/schemas/devContainer.schema.generated.json
+++ b/extensions/configuration-editing/schemas/devContainer.schema.generated.json
@@ -406,6 +406,31 @@
 				},
 				"customizations": {
 					"type": "object",
+					"properties": {
+						"vscode": {
+							"type": "object",
+							"properties": {
+								"extensions": {
+									"type": "array",
+									"description": "An array of extensions that should be installed into the container.",
+									"items": {
+										"type": "string",
+										"pattern": "^([a-z0-9A-Z][a-z0-9A-Z-]*)\\.([a-z0-9A-Z][a-z0-9A-Z-]*)(@(0|[1-9]\\d*)\\.(0|[1-9]\\d*)\\.(0|[1-9]\\d*)(?:-((?:0|[1-9]\\d*|\\d*[a-zA-Z-][0-9a-zA-Z-]*)(?:\\.(?:0|[1-9]\\d*|\\d*[a-zA-Z-][0-9a-zA-Z-]*))*))?(?:\\+([0-9a-zA-Z-]+(?:\\.[0-9a-zA-Z-]+)*))?)?$",
+										"errorMessage": "Expected format: '${publisher}.${name}' or '${publisher}.${name}@${version}'. Example: 'ms-dotnettools.csharp'."
+									}
+								},
+								"settings": {
+									"$ref": "vscode://schemas/settings/machine",
+									"description": "Machine specific settings that should be copied into the container. These are only copied when connecting to the container for the first time, rebuilding the container then triggers it again."
+								},
+								"devPort": {
+									"type": "integer",
+									"description": "The port VS Code can use to connect to its backend."
+								}
+							},
+							"additionalProperties": false
+						}
+					},
 					"additionalProperties": {
 						"type": "object",
 						"additionalProperties": true
@@ -817,6 +842,31 @@
 				},
 				"customizations": {
 					"type": "object",
+					"properties": {
+						"vscode": {
+							"type": "object",
+							"properties": {
+								"extensions": {
+									"type": "array",
+									"description": "An array of extensions that should be installed into the container.",
+									"items": {
+										"type": "string",
+										"pattern": "^([a-z0-9A-Z][a-z0-9A-Z-]*)\\.([a-z0-9A-Z][a-z0-9A-Z-]*)(@(0|[1-9]\\d*)\\.(0|[1-9]\\d*)\\.(0|[1-9]\\d*)(?:-((?:0|[1-9]\\d*|\\d*[a-zA-Z-][0-9a-zA-Z-]*)(?:\\.(?:0|[1-9]\\d*|\\d*[a-zA-Z-][0-9a-zA-Z-]*))*))?(?:\\+([0-9a-zA-Z-]+(?:\\.[0-9a-zA-Z-]+)*))?)?$",
+										"errorMessage": "Expected format: '${publisher}.${name}' or '${publisher}.${name}@${version}'. Example: 'ms-dotnettools.csharp'."
+									}
+								},
+								"settings": {
+									"$ref": "vscode://schemas/settings/machine",
+									"description": "Machine specific settings that should be copied into the container. These are only copied when connecting to the container for the first time, rebuilding the container then triggers it again."
+								},
+								"devPort": {
+									"type": "integer",
+									"description": "The port VS Code can use to connect to its backend."
+								}
+							},
+							"additionalProperties": false
+						}
+					},
 					"additionalProperties": {
 						"type": "object",
 						"additionalProperties": true
@@ -1194,6 +1244,31 @@
 				},
 				"customizations": {
 					"type": "object",
+					"properties": {
+						"vscode": {
+							"type": "object",
+							"properties": {
+								"extensions": {
+									"type": "array",
+									"description": "An array of extensions that should be installed into the container.",
+									"items": {
+										"type": "string",
+										"pattern": "^([a-z0-9A-Z][a-z0-9A-Z-]*)\\.([a-z0-9A-Z][a-z0-9A-Z-]*)(@(0|[1-9]\\d*)\\.(0|[1-9]\\d*)\\.(0|[1-9]\\d*)(?:-((?:0|[1-9]\\d*|\\d*[a-zA-Z-][0-9a-zA-Z-]*)(?:\\.(?:0|[1-9]\\d*|\\d*[a-zA-Z-][0-9a-zA-Z-]*))*))?(?:\\+([0-9a-zA-Z-]+(?:\\.[0-9a-zA-Z-]+)*))?)?$",
+										"errorMessage": "Expected format: '${publisher}.${name}' or '${publisher}.${name}@${version}'. Example: 'ms-dotnettools.csharp'."
+									}
+								},
+								"settings": {
+									"$ref": "vscode://schemas/settings/machine",
+									"description": "Machine specific settings that should be copied into the container. These are only copied when connecting to the container for the first time, rebuilding the container then triggers it again."
+								},
+								"devPort": {
+									"type": "integer",
+									"description": "The port VS Code can use to connect to its backend."
+								}
+							},
+							"additionalProperties": false
+						}
+					},
 					"additionalProperties": {
 						"type": "object",
 						"additionalProperties": true
@@ -1545,6 +1620,31 @@
 				},
 				"customizations": {
 					"type": "object",
+					"properties": {
+						"vscode": {
+							"type": "object",
+							"properties": {
+								"extensions": {
+									"type": "array",
+									"description": "An array of extensions that should be installed into the container.",
+									"items": {
+										"type": "string",
+										"pattern": "^([a-z0-9A-Z][a-z0-9A-Z-]*)\\.([a-z0-9A-Z][a-z0-9A-Z-]*)(@(0|[1-9]\\d*)\\.(0|[1-9]\\d*)\\.(0|[1-9]\\d*)(?:-((?:0|[1-9]\\d*|\\d*[a-zA-Z-][0-9a-zA-Z-]*)(?:\\.(?:0|[1-9]\\d*|\\d*[a-zA-Z-][0-9a-zA-Z-]*))*))?(?:\\+([0-9a-zA-Z-]+(?:\\.[0-9a-zA-Z-]+)*))?)?$",
+										"errorMessage": "Expected format: '${publisher}.${name}' or '${publisher}.${name}@${version}'. Example: 'ms-dotnettools.csharp'."
+									}
+								},
+								"settings": {
+									"$ref": "vscode://schemas/settings/machine",
+									"description": "Machine specific settings that should be copied into the container. These are only copied when connecting to the container for the first time, rebuilding the container then triggers it again."
+								},
+								"devPort": {
+									"type": "integer",
+									"description": "The port VS Code can use to connect to its backend."
+								}
+							},
+							"additionalProperties": false
+						}
+					},
 					"additionalProperties": {
 						"type": "object",
 						"additionalProperties": true
@@ -1861,6 +1961,31 @@
 				},
 				"customizations": {
 					"type": "object",
+					"properties": {
+						"vscode": {
+							"type": "object",
+							"properties": {
+								"extensions": {
+									"type": "array",
+									"description": "An array of extensions that should be installed into the container.",
+									"items": {
+										"type": "string",
+										"pattern": "^([a-z0-9A-Z][a-z0-9A-Z-]*)\\.([a-z0-9A-Z][a-z0-9A-Z-]*)(@(0|[1-9]\\d*)\\.(0|[1-9]\\d*)\\.(0|[1-9]\\d*)(?:-((?:0|[1-9]\\d*|\\d*[a-zA-Z-][0-9a-zA-Z-]*)(?:\\.(?:0|[1-9]\\d*|\\d*[a-zA-Z-][0-9a-zA-Z-]*))*))?(?:\\+([0-9a-zA-Z-]+(?:\\.[0-9a-zA-Z-]+)*))?)?$",
+										"errorMessage": "Expected format: '${publisher}.${name}' or '${publisher}.${name}@${version}'. Example: 'ms-dotnettools.csharp'."
+									}
+								},
+								"settings": {
+									"$ref": "vscode://schemas/settings/machine",
+									"description": "Machine specific settings that should be copied into the container. These are only copied when connecting to the container for the first time, rebuilding the container then triggers it again."
+								},
+								"devPort": {
+									"type": "integer",
+									"description": "The port VS Code can use to connect to its backend."
+								}
+							},
+							"additionalProperties": false
+						}
+					},
 					"additionalProperties": {
 						"type": "object",
 						"additionalProperties": true
diff --git a/extensions/configuration-editing/schemas/devContainer.schema.src.json b/extensions/configuration-editing/schemas/devContainer.schema.src.json
index 88fa664bdda..b0e5b5c6f4a 100644
--- a/extensions/configuration-editing/schemas/devContainer.schema.src.json
+++ b/extensions/configuration-editing/schemas/devContainer.schema.src.json
@@ -309,6 +309,30 @@
 				},
 				"customizations": {
 					"type": "object",
+					"properties": {
+						"vscode": {
+							"type": "object",
+							"properties": {
+								"extensions": {
+									"type": "array",
+									"description": "An array of extensions that should be installed into the container.",
+									"items": {
+										"type": "string",
+										"pattern": "^([a-z0-9A-Z][a-z0-9A-Z-]*)\\.([a-z0-9A-Z][a-z0-9A-Z-]*)(@(0|[1-9]\\d*)\\.(0|[1-9]\\d*)\\.(0|[1-9]\\d*)(?:-((?:0|[1-9]\\d*|\\d*[a-zA-Z-][0-9a-zA-Z-]*)(?:\\.(?:0|[1-9]\\d*|\\d*[a-zA-Z-][0-9a-zA-Z-]*))*))?(?:\\+([0-9a-zA-Z-]+(?:\\.[0-9a-zA-Z-]+)*))?)?$",
+										"errorMessage": "Expected format: '${publisher}.${name}' or '${publisher}.${name}@${version}'. Example: 'ms-dotnettools.csharp'."
+									}
+								},
+								"settings": {
+									"$ref": "vscode://schemas/settings/machine",
+									"description": "Machine specific settings that should be copied into the container. These are only copied when connecting to the container for the first time, rebuilding the container then triggers it again."
+								},
+								"devPort": {
+									"type": "integer",
+									"description": "The port VS Code can use to connect to its backend."
+								}
+							}
+						}
+					},
 					"additionalProperties": {
 						"type": "object",
 						"additionalProperties": true