feat/stubgen: make type hints more specific

pyproject.toml

@@ -44,8 +44,6 @@ reportImportCycles = "hint"
 
 # Downgraded to hint for capnp to_dict() dynamic data patterns
 reportUnknownVariableType = "hint"
-reportUnknownArgumentType = "hint"
 reportUnknownMemberType = "hint"
-reportUnknownParameterType = "hint"
 reportAny = "hint"
 reportExplicitAny = "hint"

src/capnp_stubgen/gen_interface.py

@@ -74,8 +74,6 @@ def generate_interface(
             "result_info": result_info,
         })
 
-    emitter.add_typing_import("Any")
-
     # ── Main interface class ───────────────────────────────────────────
     emitter.begin_class(name)
 
@@ -106,7 +104,7 @@ def generate_interface(
     emitter.begin_class(client_name, bases=[name])
     emitter.add_method(
         "_new_client",
-        params=["self", "server: Any"],
+        params=["self", f"server: {name}Server"],
         return_type=client_name,
     )
     emitter.end_class()
@@ -121,8 +119,8 @@ def generate_interface(
 
         emitter.add_method(
             mname,
-            params=["self", f"_params: {param_type}", "_context: Any"],
-            return_type=None,
+            params=["self", f"_params: {param_type}", "_context: object"],
+            return_type="None",
         )
 
     emitter.end_class()

src/capnp_stubgen/gen_struct.py

@@ -123,7 +123,8 @@ def generate_struct(
         _generate_union_methods(emitter, union_fields)
 
     # Factory methods + to_dict
-    _generate_factory_methods(emitter, qbuilder, qreader)
+    _generate_factory_methods(emitter, qbuilder, qreader, non_union_fields)
+    emitter.add_typing_import("Any")
     emitter.add_method("to_dict", params=["self"], return_type="dict[str, Any]")
 
     emitter.end_class()
@@ -242,15 +243,23 @@ def _generate_union_methods(
 
 
 def _generate_factory_methods(
-    emitter: Emitter, qbuilder: str, qreader: str
+    emitter: Emitter,
+    qbuilder: str,
+    qreader: str,
+    non_union_fields: list[tuple[str, str]],
 ) -> None:
-    emitter.add_typing_import("Any")
     emitter.add_typing_import("Generator", "collections.abc")
     emitter.add_typing_import("contextmanager", "contextlib")
 
     emitter.add_blank_line()
+    # Typed kwargs: name: str = ..., age: int = ...
+    if non_union_fields:
+        kwargs = [f"{name}: {typ} = ..." for name, typ in non_union_fields]
+    else:
+        emitter.add_typing_import("Any")
+        kwargs = ["**kwargs: Any"]
     emitter.add_static_method(
-        "new_message", params=["**kwargs: Any"], return_type=qbuilder,
+        "new_message", params=kwargs, return_type=qbuilder,
     )
     emitter.add_blank_line()
 
@@ -298,6 +307,6 @@ def _generate_builder_methods(
     emitter.add_blank_line()
 
     emitter.add_typing_import("IO", "typing")
-    emitter.add_static_method("write", params=["file: IO[bytes]"])
+    emitter.add_static_method("write", params=["file: IO[bytes]"], return_type="None")
     emitter.add_blank_line()
-    emitter.add_static_method("write_packed", params=["file: IO[bytes]"])
+    emitter.add_static_method("write_packed", params=["file: IO[bytes]"], return_type="None")

src/capnp_stubgen/type_resolver.py

@@ -132,7 +132,7 @@ def _resolve_any_pointer(
     if "parameter" in ap_dict:
         # Look up the generic parameter name from the parent scope
         scope_id = type_id_to_int(ap_dict["parameter"]["scopeId"])
-        param_index = ap_dict["parameter"]["parameterIndex"]
+        param_index: int = ap_dict["parameter"]["parameterIndex"]
         info = registry.get(scope_id)
         if info is not None and param_index < len(info.generic_params):
             return PythonType(name=info.generic_params[param_index])