diff --git a/changelog.d/20241113_094144_samuel.guillaume_spi_526_add_fields_is_diff_and_diff_kind.md b/changelog.d/20241113_094144_samuel.guillaume_spi_526_add_fields_is_diff_and_diff_kind.md
new file mode 100644
index 00000000..6b79f4c7
--- /dev/null
+++ b/changelog.d/20241113_094144_samuel.guillaume_spi_526_add_fields_is_diff_and_diff_kind.md
@@ -0,0 +1,42 @@
+<!--
+A new scriv changelog fragment.
+
+Uncomment the section that is right (remove the HTML comment wrapper).
+-->
+
+<!--
+### Removed
+
+- A bullet item for the Removed category.
+
+-->
+
+### Added
+
+- Add field is_diff to ScanResult
+- Add field diff_kind to PolicyBreak
+
+<!--
+### Changed
+
+- A bullet item for the Changed category.
+
+-->
+<!--
+### Deprecated
+
+- A bullet item for the Deprecated category.
+
+-->
+<!--
+### Fixed
+
+- A bullet item for the Fixed category.
+
+-->
+<!--
+### Security
+
+- A bullet item for the Security category.
+
+-->
diff --git a/pygitguardian/models.py b/pygitguardian/models.py
index a826c922..b6683e48 100644
--- a/pygitguardian/models.py
+++ b/pygitguardian/models.py
@@ -255,6 +255,12 @@ def __repr__(self) -> str:
         )
 
 
+class DiffKind(str, Enum):
+    ADDITION = "addition"
+    DELETION = "deletion"
+    CONTEXT = "context"
+
+
 class PolicyBreakSchema(BaseSchema):
     break_type = fields.String(data_key="type", required=True)
     policy = fields.String(required=True)
@@ -264,6 +270,9 @@ class PolicyBreakSchema(BaseSchema):
     matches = fields.List(fields.Nested(MatchSchema), required=True)
     is_excluded = fields.Boolean(required=False, load_default=False, dump_default=False)
     exclude_reason = fields.String(required=False, load_default=None, dump_default=None)
+    diff_kind = fields.Enum(
+        DiffKind, by_value=True, required=False, load_default=None, dump_default=None
+    )
 
     @post_load
     def make_policy_break(self, data: Dict[str, Any], **kwargs: Any) -> "PolicyBreak":
@@ -290,6 +299,7 @@ def __init__(
         incident_url: Optional[str] = None,
         is_excluded: bool = False,
         exclude_reason: Optional[str] = None,
+        diff_kind: Optional[DiffKind] = None,
         **kwargs: Any,
     ) -> None:
         super().__init__()
@@ -301,6 +311,7 @@ def __init__(
         self.matches = matches
         self.is_excluded = is_excluded
         self.exclude_reason = exclude_reason
+        self.diff_kind = diff_kind
 
     @property
     def is_secret(self) -> bool:
@@ -318,6 +329,7 @@ class ScanResultSchema(BaseSchema):
     policy_break_count = fields.Integer(required=True)
     policies = fields.List(fields.String(), required=True)
     policy_breaks = fields.List(fields.Nested(PolicyBreakSchema), required=True)
+    is_diff = fields.Boolean(required=False, load_default=False, dump_default=None)
 
     @post_load
     def make_scan_result(self, data: Dict[str, Any], **kwargs: Any) -> "ScanResult":
@@ -341,6 +353,7 @@ def __init__(
         policy_break_count: int,
         policy_breaks: List[PolicyBreak],
         policies: List[str],
+        is_diff: bool = False,
         **kwargs: Any,
     ) -> None:
         """
@@ -350,11 +363,14 @@ def __init__(
         :type policy_breaks: List
         :param policies: string list of policies evaluated
         :type policies: List[str]
+        :param is_diff: true if the document scanned is a diff
+        :type is_diff: bool
         """
         super().__init__()
         self.policy_break_count = policy_break_count
         self.policies = policies
         self.policy_breaks = policy_breaks
+        self.is_diff = is_diff
 
     @property
     def has_policy_breaks(self) -> bool:
diff --git a/tests/test_models.py b/tests/test_models.py
index dbddde79..09eb7fa7 100644
--- a/tests/test_models.py
+++ b/tests/test_models.py
@@ -137,6 +137,22 @@ def test_document_handle_surrogates(self):
                     "matches": [{"match": "hello", "type": "hello"}],
                     "is_excluded": False,
                     "exclude_reason": None,
+                    "diff_kind": None,
+                },
+            ),
+            (
+                PolicyBreakSchema,
+                PolicyBreak,
+                {
+                    "type": "hello",
+                    "policy": "hello",
+                    "validity": "hey",
+                    "known_secret": True,
+                    "incident_url": "https://api.gitguardian.com/workspace/2/incidents/3",
+                    "matches": [{"match": "hello", "type": "hello"}],
+                    "is_excluded": False,
+                    "exclude_reason": None,
+                    "diff_kind": "addition",
                 },
             ),
             (
@@ -166,6 +182,16 @@ def test_document_handle_surrogates(self):
                 ScanResult,
                 {"policy_break_count": 1, "policy_breaks": [], "policies": []},
             ),
+            (
+                ScanResultSchema,
+                ScanResult,
+                {
+                    "policy_break_count": 1,
+                    "policy_breaks": [],
+                    "policies": [],
+                    "is_diff": True,
+                },
+            ),
             (
                 DetailSchema,
                 Detail,