[Fix] Work around xgrammar 0.2.1 negative integer minimum in Kimi-K3 structural tags (#34778)

Co-authored-by: James Liu <jamesl@modal.com>
2026-08-14 16:41:06 -07:00
parent be804c1b83
commit 3f64f14360
2 changed files with 60 additions and 0 deletions
@@ -379,6 +379,39 @@ def test_strict_schema_handles_number_enums_and_all_of_integer_constraints():
    )


+def test_strict_schema_handles_one_sided_negative_integer_minimum():
+    tool = Tool(
+        type="function",
+        function=Function(
+            name="submit",
+            strict=True,
+            parameters={
+                "type": "object",
+                "properties": {
+                    "value": {
+                        "type": "integer",
+                        "minimum": -1000000,
+                    }
+                },
+                "required": ["value"],
+                "additionalProperties": False,
+            },
+        ),
+    )
+    grammar = _grammar([tool], tool_choice="required")
+
+    for value in ("-1000000", "-999999", "-1", "0", "1000001"):
+        assert _accepts(
+            grammar,
+            _tools_section(_call("submit", 1, _argument("value", "number", value))),
+        )
+    for value in ("-", "-1000001", "1.5"):
+        assert not _accepts(
+            grammar,
+            _tools_section(_call("submit", 1, _argument("value", "number", value))),
+        )
+
+
 def test_strict_schema_preserves_additional_properties_default():
    tool = Tool(
        type="function",