diff --git a/schemas/dbt_project.json b/schemas/dbt_project.json
index d8f7258..e848926 100644
--- a/schemas/dbt_project.json
+++ b/schemas/dbt_project.json
@@ -163,6 +163,18 @@
                 "type": "string"
             }
         },
+        "contract": {
+            "type": "object",
+            "required": [
+                "enforced"
+            ],
+            "properties": {
+                "enforced": {
+                  "$ref": "#/$defs/boolean_or_jinja_string",
+                  "default": "true"
+                }
+            }
+        },
         "empty_directory": {
             "type": "null"
         },
@@ -254,6 +266,9 @@
                     "$ref": "#/$defs/boolean_or_jinja_string",
                     "default": false
                 },
+                "+contract": {
+                    "$ref": "#/$defs/contract"
+                },
                 "+database": {
                     "$ref": "#/$defs/database"
                 },
@@ -309,6 +324,9 @@
                     "$ref": "#/$defs/boolean_or_jinja_string",
                     "default": false
                 },
+                "contract": {
+                    "$ref": "#/$defs/contract"
+                },
                 "database": {
                     "$ref": "#/$defs/database"
                 },
diff --git a/schemas/dbt_yml_files.json b/schemas/dbt_yml_files.json
index 878c288..01e2739 100644
--- a/schemas/dbt_yml_files.json
+++ b/schemas/dbt_yml_files.json
@@ -115,6 +115,32 @@
           }
         }
       },
+      "groups": {
+        "type": "array",
+        "items": {
+          "type": "object",
+          "required": ["name", "owner"],
+          "properties": {
+            "name": {
+              "type": "string"
+            },
+            "owner": {
+              "type": "object",
+              "minProperties": 1,
+              "properties": {
+                "name": {
+                  "type": "string"
+                },
+                "email": {
+                  "type": "string"
+                }
+              },
+              "additionalProperties": false
+            }
+          },
+          "additionalProperties": false
+        }
+      },
       "macros": {
         "type": "array",
         "items": {
@@ -183,6 +209,20 @@
             ]
           },
           "properties": {
+              "config": {
+              "type": "object",
+              "properties": {
+                "enabled": {
+                  "$ref": "#/$defs/boolean_or_jinja_string"
+                },
+                "treat_null_values_as_zero": {
+                  "$ref": "#/$defs/boolean_or_jinja_string"
+                },
+                "group": {
+                  "type": "string"
+                }
+              }
+            },
             "calculation_method": {
               "type": "string"
             },
@@ -246,6 +286,10 @@
             "name": {
               "type": "string"
             },
+            "access": {
+              "type": "string",
+              "enum": ["private", "protected", "public"]
+            },
             "columns": {
               "type": "array",
               "items": {
@@ -253,54 +297,10 @@
               }
             },
             "config": {
-              "type": "object",
-              "properties": {
-                "grant_access_to": {
-                  "title": "Authorized views",
-                  "type": "array",
-                  "description": "Configuration, specific to BigQuery adapter, used to setup authorized views.",
-                  "items": {
-                    "type": "object",
-                    "required": ["database", "project"],
-                    "properties": {
-                      "database": {
-                        "type": "string"
-                      },
-                      "project": {
-                        "type": "string"
-                      }
-                    },
-                    "additionalProperties": false
-                  }
-                },
-                "hours_to_expiration": {
-                  "type": "number",
-                  "description": "Configuration specific to BigQuery adapter used to set an expiration delay (in hours) to a table."
-                },
-                "kms_key_name": {
-                  "type": "string",
-                  "description": "Configuration of the KMS key name, specific to BigQuery adapter.",
-                  "pattern": "projects/[a-zA-Z0-9_-]*/locations/[a-zA-Z0-9_-]*/keyRings/.*/cryptoKeys/.*"
-                },
-                "labels": {
-                  "title": "Label configs",
-                  "type": "object",
-                  "description": "Configuration specific to BigQuery adapter used to add labels and tags to tables/views created by dbt.",
-                  "patternProperties": {
-                    "^[a-z][a-z0-9_-]{0,62}$": {
-                      "type": "string",
-                      "pattern": "^[a-z0-9_-]{0,63}$"
-                    }
-                  },
-                  "additionalProperties": false
-                },
-                "materialized": {
-                  "type": "string"
-                },
-                "sql_header": {
-                  "type": "string"
-                }
-              }
+              "$ref": "#/$defs/model_configs"
+            },
+            "constraints": {
+              "$ref": "#/$defs/constraints"
             },
             "description": {
               "type": "string"
@@ -313,6 +313,12 @@
                 }
               }
             },
+            "group": {
+              "type": "string"
+            },
+            "latest_version": {
+              "type": "number"
+            },
             "meta": {
               "type": "object"
             },
@@ -321,6 +327,34 @@
               "items": {
                 "$ref": "#/$defs/tests"
               }
+            },
+            "versions": {
+              "type": "array",
+              "items": {
+                "type": "object",
+                "required": ["v"],
+                "properties": {
+                  "v": {
+                    "type": "number" 
+                  },
+                  "config": {
+                    "$ref": "#/$defs/model_configs" 
+                  },
+                  "columns": {
+                    "type": "array",
+                    "items": {
+                      "anyOf": [
+                        {
+                          "$ref": "#/$defs/include_exclude" 
+                        },
+                        {
+                          "$ref": "#/$defs/column_properties"
+                        }
+                      ]
+                    }
+                  }
+                }
+              }
             }
           },
           "additionalProperties": false
@@ -634,6 +668,9 @@
           "name": {
             "type": "string"
           },
+          "constraints": {
+            "$ref": "#/$defs/constraints"
+          },
           "data_type": {
             "type": "string"
           },
@@ -666,6 +703,33 @@
         },
         "additionalProperties": false
       },
+      "constraints": {
+        "type": "array",
+        "items": {
+          "type": "object",
+          "required": ["type"],
+          "properties": {
+            "columns": {
+              "$ref": "#/$defs/string_or_array_of_strings"
+            },
+            "expression": {
+              "type": "string"
+            },
+            "name": {
+              "type": "string"
+            },
+            "type": {
+              "type": "string"
+            },
+            "warn_unenforced": {
+              "$ref": "#/$defs/boolean_or_jinja_string"
+            },
+            "warn_unsupported": {
+              "$ref": "#/$defs/boolean_or_jinja_string"
+            }
+          }
+        }
+      },
       "freshness_definition": {
         "default": {
           "warn_after": {
@@ -712,10 +776,79 @@
         },
         "additionalProperties": false
       },
+      "include_exclude": {
+        "type": "object",
+        "properties": {
+          "include": {
+            "$ref": "#/$defs/string_or_array_of_strings"
+          },
+          "exclude": {
+            "$ref": "#/$defs/string_or_array_of_strings"
+          }
+        }
+      },
       "jinja_string": {
         "type": "string",
         "pattern": "\\{\\{.*\\}\\}"
       },
+      "model_configs": {
+        "type": "object",
+        "properties": {
+          "contract": {
+            "type": "object",
+            "properties": {
+              "enforced": {
+                "$ref": "#/$defs/boolean_or_jinja_string"
+              }
+            }
+          },
+          "grant_access_to": {
+            "title": "Authorized views",
+            "type": "array",
+            "description": "Configuration, specific to BigQuery adapter, used to setup authorized views.",
+            "items": {
+              "type": "object",
+              "required": ["database", "project"],
+              "properties": {
+                "database": {
+                  "type": "string"
+                },
+                "project": {
+                  "type": "string"
+                }
+              },
+              "additionalProperties": false
+            }
+          },
+          "hours_to_expiration": {
+            "type": "number",
+            "description": "Configuration specific to BigQuery adapter used to set an expiration delay (in hours) to a table."
+          },
+          "kms_key_name": {
+            "type": "string",
+            "description": "Configuration of the KMS key name, specific to BigQuery adapter.",
+            "pattern": "projects/[a-zA-Z0-9_-]*/locations/[a-zA-Z0-9_-]*/keyRings/.*/cryptoKeys/.*"
+          },
+          "labels": {
+            "title": "Label configs",
+            "type": "object",
+            "description": "Configuration specific to BigQuery adapter used to add labels and tags to tables/views created by dbt.",
+            "patternProperties": {
+              "^[a-z][a-z0-9_-]{0,62}$": {
+                "type": "string",
+                "pattern": "^[a-z0-9_-]{0,63}$"
+              }
+            },
+            "additionalProperties": false
+          },
+          "materialized": {
+            "type": "string"
+          },
+          "sql_header": {
+            "type": "string"
+          }
+        }
+      },
       "number_or_jinja_string": {
         "oneOf": [
           {
diff --git a/tests/valid/dbt_project.yml b/tests/valid/dbt_project.yml
index 4359074..d1f73c5 100644
--- a/tests/valid/dbt_project.yml
+++ b/tests/valid/dbt_project.yml
@@ -39,6 +39,10 @@ models:
       # same key without the plus
       materialized: table
     empty_subdirectory:
+    contracted_models:
+      +contract:
+        enforced: true
+    
   test_bq:
     +labels:
       key: val
diff --git a/tests/valid/schema.yml b/tests/valid/schema.yml
index 2a31015..277f4f3 100644
--- a/tests/valid/schema.yml
+++ b/tests/valid/schema.yml
@@ -19,6 +19,51 @@ models:
           - unique
           - not_null
 
+  - name: my_contracted_dbt_model
+    description: "A dbt model with contracts"
+    access: public
+    group: analytics
+    latest_version: 2
+    config:
+      contract: 
+        enforced: true
+    columns:
+      - name: id
+        description: "The primary key for this table"
+        data_type: int
+        constraints: 
+          - type: not_null
+          - type: unique
+          - type: check
+            expression: (id > 0)
+        tests:
+          - unique
+          - not_null
+    versions:
+      - v: 2
+        columns:
+          - include: '*'
+            exclude: country_name
+          - name: id  # included in addition the '*' set. if id were in the '*' set -> override it
+            description: This is the primary key
+            data_type: float
+      - v: 1
+        config:
+          alias: dim_customers
+  
+  - name: my_model_level_contract_model
+    config:
+      contract:
+        enforced: true
+    constraints:
+    - type: check
+      expression: (id > 0)
+    - type: primary_key
+      columns: [ id ]
+    - type: unique
+      columns: [ color, date_day ]
+      name: strange_uniqueness_requirement
+
 
 snapshots:
   - name: snapshot_name
@@ -28,6 +73,13 @@ snapshots:
         description: cool column, eh?
 
 
+# model groups 
+
+groups:
+  - name: analytics
+    owner:
+      name: dave
+      
 metrics:
   - name: new_customers
     label: New Customers marked 'paying'
@@ -61,4 +113,4 @@ metrics:
     description: "The number of paid customers using the product"
 
     calculation_method: derived
-    expression: "{{ metric('new_customers') }} * 2" 
\ No newline at end of file
+    expression: "{{ metric('new_customers') }} * 2"