diff --git a/src/plyngent/cli/editor.py b/src/plyngent/cli/editor.py
index bff7548..69415a2 100644
--- a/src/plyngent/cli/editor.py
+++ b/src/plyngent/cli/editor.py
@@ -118,7 +118,7 @@ def _open_with_system_default(path: Path) -> None:
     resolved = str(path.resolve())
     if sys.platform == "win32":
         try:
-            os.startfile(resolved)  # type: ignore[attr-defined]
+            os.startfile(resolved)
         except OSError as exc:
             msg = f"failed to open with system default: {exc}"
             raise click.ClickException(msg) from exc
diff --git a/tests/test_agent/test_todo_stack.py b/tests/test_agent/test_todo_stack.py
index 13dff38..7b06554 100644
--- a/tests/test_agent/test_todo_stack.py
+++ b/tests/test_agent/test_todo_stack.py
@@ -342,7 +342,7 @@ async def test_loop_injects_todo_review_when_untouched() -> None:
     stack.begin_turn()
     client = ScriptedClient()
     agent = ChatAgent(
-        client,  # type: ignore[arg-type]
+        client,
         model="m",
         tools=_todo_registry(stack),
         stream=False,
@@ -420,7 +420,7 @@ async def test_loop_skips_todo_review_when_touched_even_if_open() -> None:
 
     client = ScriptedClientWithTodoListThenStop()
     agent = ChatAgent(
-        client,  # type: ignore[arg-type]
+        client,
         model="m",
         tools=_todo_registry(stack),
         stream=False,
@@ -447,7 +447,7 @@ async def test_loop_synthetic_tool_nag_strategy() -> None:
     stack.begin_turn()
     client = ScriptedClient()
     agent = ChatAgent(
-        client,  # type: ignore[arg-type]
+        client,
         model="m",
         tools=_todo_registry(stack),
         stream=False,
@@ -471,7 +471,7 @@ async def test_loop_none_nag_strategy_skips_inject() -> None:
     stack.begin_turn()
     client = ScriptedClient()
     agent = ChatAgent(
-        client,  # type: ignore[arg-type]
+        client,
         model="m",
         tools=_todo_registry(stack),
         stream=False,
@@ -580,7 +580,7 @@ async def test_loop_synthetic_tool_refreshes_after_stack_cleared() -> None:
     _ = stack.push("was dirty")
     client = CaptureClient()
     agent = ChatAgent(
-        client,  # type: ignore[arg-type]
+        client,
         model="m",
         tools=_todo_registry(stack),
         stream=False,
diff --git a/tests/test_cli/test_oneshot.py b/tests/test_cli/test_oneshot.py
index 9dbccdb..0cf6fe8 100644
--- a/tests/test_cli/test_oneshot.py
+++ b/tests/test_cli/test_oneshot.py
@@ -108,7 +108,7 @@ access_key_or_token = "sk"
 
                 async def empty() -> AsyncIterator[ChatCompletionChunk]:
                     if False:
-                        yield  # type: ignore[misc]
+                        yield
                     return
 
                 return empty()
diff --git a/tests/test_tools/test_catalog.py b/tests/test_tools/test_catalog.py
index 3bece7e..8f7bda0 100644
--- a/tests/test_tools/test_catalog.py
+++ b/tests/test_tools/test_catalog.py
@@ -90,7 +90,7 @@ def test_registration_source_context() -> None:
 def test_tool_tags_reject_neither_surface() -> None:
     try:
 
-        @tool(tags=ToolTag.YOLO, register=False)  # type: ignore[arg-type]
+        @tool(tags=ToolTag.YOLO, register=False)
         async def bad() -> str:
             return "x"