diff --git a/renderers/kimi_k25.py b/renderers/kimi_k25.py
index 31ee759..8a4a51e 100644
--- a/renderers/kimi_k25.py
+++ b/renderers/kimi_k25.py
@@ -213,7 +213,9 @@ def __init__(self, schema: dict[str, Any]):
         self.enum = schema["enum"]
 
     def to_typescript_style(self, indent: str = "") -> str:
-        return " | ".join(f'"{e}"' if isinstance(e, str) else str(e) for e in self.enum)
+        return " | ".join(
+            f'"{e}"' if isinstance(e, str) else json.dumps(e) for e in self.enum
+        )
 
 
 class _AnyOfType(_BaseType):
@@ -283,11 +285,7 @@ def __init__(
     def to_typescript_style(self, indent: str = "") -> str:
         comments = self.type_.format_docstring(indent)
         if self.default is not None:
-            default_repr = (
-                json.dumps(self.default, ensure_ascii=False)
-                if not isinstance(self.default, (int, float, bool))
-                else repr(self.default)
-            )
+            default_repr = json.dumps(self.default, ensure_ascii=False)
             comments += f"{indent}// Default: {default_repr}\n"
         opt = "?" if self.optional else ""
         return (
diff --git a/tests/test_kimi_k25_tool_schema.py b/tests/test_kimi_k25_tool_schema.py
new file mode 100644
index 0000000..3830e18
--- /dev/null
+++ b/tests/test_kimi_k25_tool_schema.py
@@ -0,0 +1,53 @@
+"""Kimi K2.5 tool-schema TypeScript rendering: bool/null literal correctness.
+
+Regression for PR #55: ``_function_to_typescript`` used to leak Python
+literals (``True`` / ``False`` / ``None``) into output advertised as
+TypeScript. Both call sites — ``_EnumType.to_typescript_style`` (for
+non-string enum members) and ``_TypedParam.to_typescript_style`` (for
+bool defaults) — now route non-string values through ``json.dumps`` so
+booleans and ``None`` render as ``true`` / ``false`` / ``null``.
+"""
+
+from __future__ import annotations
+
+from renderers.kimi_k25 import _function_to_typescript
+
+
+def test_bool_default_renders_as_json_literal():
+    """Bool defaults must render as ``true`` / ``false``, not ``True`` / ``False``."""
+    out = _function_to_typescript(
+        {
+            "name": "set_logging",
+            "parameters": {
+                "type": "object",
+                "properties": {
+                    "verbose": {"type": "boolean", "default": True},
+                    "quiet": {"type": "boolean", "default": False},
+                },
+            },
+        }
+    )
+    assert "// Default: true" in out
+    assert "// Default: false" in out
+    assert "Default: True" not in out
+    assert "Default: False" not in out
+
+
+def test_enum_non_string_members_render_as_json_literals():
+    """``null`` / bool / int enum members must render as JSON literals, not Python ``repr``."""
+    out = _function_to_typescript(
+        {
+            "name": "set_mode",
+            "parameters": {
+                "type": "object",
+                "properties": {
+                    "mode": {"enum": ["auto", None, True, False, 0]},
+                },
+            },
+        }
+    )
+    assert '"auto" | null | true | false | 0' in out
+    # Python literals must not leak through.
+    assert "None" not in out
+    assert "True" not in out
+    assert "False" not in out