diff --git a/static/schemas/v1/index.json b/static/schemas/v1/index.json
index 4848eb0809..363ad8f923 100644
--- a/static/schemas/v1/index.json
+++ b/static/schemas/v1/index.json
@@ -132,6 +132,12 @@
     },
     "media-buy": {
       "description": "Media buy task request/response schemas",
+      "supporting-schemas": {
+        "package-request": {
+          "$ref": "/schemas/v1/media-buy/package-request.json",
+          "description": "Package configuration for media buy creation - used within create_media_buy request"
+        }
+      },
       "tasks": {
         "get-products": {
           "request": {
diff --git a/static/schemas/v1/media-buy/create-media-buy-request.json b/static/schemas/v1/media-buy/create-media-buy-request.json
index 73b6335da6..ef4787bb35 100644
--- a/static/schemas/v1/media-buy/create-media-buy-request.json
+++ b/static/schemas/v1/media-buy/create-media-buy-request.json
@@ -19,46 +19,7 @@
       "type": "array",
       "description": "Array of package configurations",
       "items": {
-        "type": "object",
-        "properties": {
-          "buyer_ref": {
-            "type": "string",
-            "description": "Buyer's reference identifier for this package"
-          },
-          "products": {
-            "type": "array",
-            "description": "Array of product IDs to include in this package",
-            "items": {
-              "type": "string"
-            }
-          },
-          "format_ids": {
-            "type": "array",
-            "description": "Array of format IDs that will be used for this package - must be supported by all products",
-            "items": {
-              "type": "string",
-              "description": "Format ID referencing a format from list_creative_formats"
-            }
-          },
-          "budget": {
-            "$ref": "/schemas/v1/core/budget.json"
-          },
-          "targeting_overlay": {
-            "$ref": "/schemas/v1/core/targeting.json"
-          },
-          "creative_ids": {
-            "type": "array",
-            "description": "Creative IDs to assign to this package at creation time",
-            "items": {
-              "type": "string"
-            }
-          }
-        },
-        "anyOf": [
-          {"required": ["buyer_ref", "products", "format_ids"]},
-          {"required": ["buyer_ref", "products", "format_selection"]}
-        ],
-        "additionalProperties": false
+        "$ref": "/schemas/v1/media-buy/package-request.json"
       }
     },
     "promoted_offering": {
diff --git a/static/schemas/v1/media-buy/package-request.json b/static/schemas/v1/media-buy/package-request.json
new file mode 100644
index 0000000000..7293215373
--- /dev/null
+++ b/static/schemas/v1/media-buy/package-request.json
@@ -0,0 +1,90 @@
+{
+  "$schema": "http://json-schema.org/draft-07/schema#",
+  "$id": "/schemas/v1/media-buy/package-request.json",
+  "title": "Package Request",
+  "description": "Package configuration for media buy creation",
+  "oneOf": [
+    {
+      "type": "object",
+      "description": "Package with explicit format IDs",
+      "properties": {
+        "buyer_ref": {
+          "type": "string",
+          "description": "Buyer's reference identifier for this package"
+        },
+        "products": {
+          "type": "array",
+          "description": "Array of product IDs to include in this package",
+          "items": {
+            "type": "string"
+          }
+        },
+        "format_ids": {
+          "type": "array",
+          "description": "Array of format IDs that will be used for this package - must be supported by all products",
+          "items": {
+            "type": "string",
+            "description": "Format ID referencing a format from list_creative_formats"
+          }
+        },
+        "budget": {
+          "$ref": "/schemas/v1/core/budget.json"
+        },
+        "targeting_overlay": {
+          "$ref": "/schemas/v1/core/targeting.json"
+        },
+        "creative_ids": {
+          "type": "array",
+          "description": "Creative IDs to assign to this package at creation time",
+          "items": {
+            "type": "string"
+          }
+        }
+      },
+      "required": ["buyer_ref", "products", "format_ids"],
+      "not": {
+        "required": ["format_selection"]
+      },
+      "additionalProperties": false
+    },
+    {
+      "type": "object",
+      "description": "Package with dynamic format selection",
+      "properties": {
+        "buyer_ref": {
+          "type": "string",
+          "description": "Buyer's reference identifier for this package"
+        },
+        "products": {
+          "type": "array",
+          "description": "Array of product IDs to include in this package",
+          "items": {
+            "type": "string"
+          }
+        },
+        "format_selection": {
+          "type": "object",
+          "description": "Dynamic format selection criteria"
+        },
+        "budget": {
+          "$ref": "/schemas/v1/core/budget.json"
+        },
+        "targeting_overlay": {
+          "$ref": "/schemas/v1/core/targeting.json"
+        },
+        "creative_ids": {
+          "type": "array",
+          "description": "Creative IDs to assign to this package at creation time",
+          "items": {
+            "type": "string"
+          }
+        }
+      },
+      "required": ["buyer_ref", "products", "format_selection"],
+      "not": {
+        "required": ["format_ids"]
+      },
+      "additionalProperties": false
+    }
+  ]
+}
diff --git a/static/schemas/v1/standard-formats/asset-types/image.json b/static/schemas/v1/standard-formats/asset-types/image.json
index 0fc920afa6..ca8dbeb3d1 100644
--- a/static/schemas/v1/standard-formats/asset-types/image.json
+++ b/static/schemas/v1/standard-formats/asset-types/image.json
@@ -3,107 +3,176 @@
   "$id": "/schemas/v1/standard-formats/asset-types/image.json",
   "title": "Image Asset Type Schema",
   "description": "Schema for static image assets in AdCP creative formats",
-  "type": "object",
-  "properties": {
-    "asset_id": {
-      "type": "string",
-      "pattern": "^[a-z0-9_]+$",
-      "description": "Unique identifier for this asset within the format"
-    },
-    "asset_type": {
-      "type": "string",
-      "const": "image"
-    },
-    "required": {
-      "type": "boolean",
-      "description": "Whether this asset is mandatory for the format"
-    },
-    "width": {
-      "type": "integer",
-      "minimum": 1,
-      "maximum": 4096,
-      "description": "Required width in pixels"
-    },
-    "height": {
-      "type": "integer", 
-      "minimum": 1,
-      "maximum": 4096,
-      "description": "Required height in pixels"
-    },
-    "acceptable_dimensions": {
-      "type": "array",
-      "items": {
-        "type": "object",
-        "properties": {
-          "width": {
-            "type": "integer",
-            "minimum": 1
+  "oneOf": [
+    {
+      "type": "object",
+      "description": "Image with exact dimensions specified",
+      "properties": {
+        "asset_id": {
+          "type": "string",
+          "pattern": "^[a-z0-9_]+$",
+          "description": "Unique identifier for this asset within the format"
+        },
+        "asset_type": {
+          "type": "string",
+          "const": "image"
+        },
+        "required": {
+          "type": "boolean",
+          "description": "Whether this asset is mandatory for the format"
+        },
+        "width": {
+          "type": "integer",
+          "minimum": 1,
+          "maximum": 4096,
+          "description": "Required width in pixels"
+        },
+        "height": {
+          "type": "integer",
+          "minimum": 1,
+          "maximum": 4096,
+          "description": "Required height in pixels"
+        },
+        "acceptable_formats": {
+          "type": "array",
+          "items": {
+            "type": "string",
+            "enum": ["jpg", "jpeg", "png", "gif", "webp", "svg", "bmp"]
           },
-          "height": {
-            "type": "integer",
-            "minimum": 1
-          }
+          "minItems": 1,
+          "uniqueItems": true,
+          "description": "List of acceptable image file formats"
         },
-        "required": ["width", "height"],
-        "additionalProperties": false
+        "max_file_size_kb": {
+          "type": "number",
+          "minimum": 1,
+          "maximum": 10240,
+          "description": "Maximum file size in kilobytes"
+        },
+        "min_file_size_kb": {
+          "type": "number",
+          "minimum": 0.1,
+          "description": "Minimum file size in kilobytes"
+        },
+        "transparency": {
+          "type": "boolean",
+          "description": "Whether transparency is required/supported"
+        },
+        "animation_allowed": {
+          "type": "boolean",
+          "description": "Whether animated images (GIF, animated WebP) are allowed"
+        },
+        "min_resolution_dpi": {
+          "type": "integer",
+          "minimum": 72,
+          "maximum": 600,
+          "description": "Minimum resolution in dots per inch"
+        },
+        "color_mode": {
+          "type": "string",
+          "enum": ["rgb", "cmyk", "grayscale"],
+          "description": "Required color mode"
+        },
+        "notes": {
+          "type": "string",
+          "maxLength": 500,
+          "description": "Additional requirements or restrictions"
+        }
       },
-      "minItems": 1,
-      "description": "Array of acceptable width/height combinations"
-    },
-    "acceptable_formats": {
-      "type": "array",
-      "items": {
-        "type": "string",
-        "enum": ["jpg", "jpeg", "png", "gif", "webp", "svg", "bmp"]
+      "required": ["asset_id", "asset_type", "required", "width", "height"],
+      "not": {
+        "required": ["acceptable_dimensions"]
       },
-      "minItems": 1,
-      "uniqueItems": true,
-      "description": "List of acceptable image file formats"
-    },
-    "max_file_size_kb": {
-      "type": "number",
-      "minimum": 1,
-      "maximum": 10240,
-      "description": "Maximum file size in kilobytes"
-    },
-    "min_file_size_kb": {
-      "type": "number",
-      "minimum": 0.1,
-      "description": "Minimum file size in kilobytes"
-    },
-    "transparency": {
-      "type": "boolean",
-      "description": "Whether transparency is required/supported"
-    },
-    "animation_allowed": {
-      "type": "boolean",
-      "description": "Whether animated images (GIF, animated WebP) are allowed"
-    },
-    "min_resolution_dpi": {
-      "type": "integer",
-      "minimum": 72,
-      "maximum": 600,
-      "description": "Minimum resolution in dots per inch"
-    },
-    "color_mode": {
-      "type": "string",
-      "enum": ["rgb", "cmyk", "grayscale"],
-      "description": "Required color mode"
-    },
-    "notes": {
-      "type": "string",
-      "maxLength": 500,
-      "description": "Additional requirements or restrictions"
-    }
-  },
-  "required": ["asset_id", "asset_type", "required"],
-  "additionalProperties": false,
-  "anyOf": [
-    {
-      "required": ["width", "height"]
+      "additionalProperties": false
     },
     {
-      "required": ["acceptable_dimensions"]
+      "type": "object",
+      "description": "Image with multiple acceptable dimension combinations",
+      "properties": {
+        "asset_id": {
+          "type": "string",
+          "pattern": "^[a-z0-9_]+$",
+          "description": "Unique identifier for this asset within the format"
+        },
+        "asset_type": {
+          "type": "string",
+          "const": "image"
+        },
+        "required": {
+          "type": "boolean",
+          "description": "Whether this asset is mandatory for the format"
+        },
+        "acceptable_dimensions": {
+          "type": "array",
+          "items": {
+            "type": "object",
+            "properties": {
+              "width": {
+                "type": "integer",
+                "minimum": 1
+              },
+              "height": {
+                "type": "integer",
+                "minimum": 1
+              }
+            },
+            "required": ["width", "height"],
+            "additionalProperties": false
+          },
+          "minItems": 1,
+          "description": "Array of acceptable width/height combinations"
+        },
+        "acceptable_formats": {
+          "type": "array",
+          "items": {
+            "type": "string",
+            "enum": ["jpg", "jpeg", "png", "gif", "webp", "svg", "bmp"]
+          },
+          "minItems": 1,
+          "uniqueItems": true,
+          "description": "List of acceptable image file formats"
+        },
+        "max_file_size_kb": {
+          "type": "number",
+          "minimum": 1,
+          "maximum": 10240,
+          "description": "Maximum file size in kilobytes"
+        },
+        "min_file_size_kb": {
+          "type": "number",
+          "minimum": 0.1,
+          "description": "Minimum file size in kilobytes"
+        },
+        "transparency": {
+          "type": "boolean",
+          "description": "Whether transparency is required/supported"
+        },
+        "animation_allowed": {
+          "type": "boolean",
+          "description": "Whether animated images (GIF, animated WebP) are allowed"
+        },
+        "min_resolution_dpi": {
+          "type": "integer",
+          "minimum": 72,
+          "maximum": 600,
+          "description": "Minimum resolution in dots per inch"
+        },
+        "color_mode": {
+          "type": "string",
+          "enum": ["rgb", "cmyk", "grayscale"],
+          "description": "Required color mode"
+        },
+        "notes": {
+          "type": "string",
+          "maxLength": 500,
+          "description": "Additional requirements or restrictions"
+        }
+      },
+      "required": ["asset_id", "asset_type", "required", "acceptable_dimensions"],
+      "not": {
+        "required": ["width", "height"]
+      },
+      "additionalProperties": false
     }
   ]
 }
\ No newline at end of file