Fix source resolution type narrowing

Author: SummerOneTwo

src/autocode_mcp/tools/checker.py

@@ -92,8 +92,9 @@ async def execute(
     ) -> ToolResult:
         """执行 Checker 构建。"""
         resolved, err = resolve_source(problem_dir, code, source_path)
-        if resolved is None:
+        if err is not None:
             return err
+        assert resolved is not None
 
         os.makedirs(problem_dir, exist_ok=True)
         files_dir = os.path.join(problem_dir, "files")

src/autocode_mcp/tools/generator.py

@@ -75,8 +75,9 @@ async def execute(
     ) -> ToolResult:
         """执行 Generator 构建。"""
         resolved, err = resolve_source(problem_dir, code, source_path)
-        if resolved is None:
+        if err is not None:
             return err
+        assert resolved is not None
 
         os.makedirs(problem_dir, exist_ok=True)
         files_dir = os.path.join(problem_dir, "files")

src/autocode_mcp/tools/interactor.py

@@ -86,8 +86,9 @@ async def execute(
     ) -> ToolResult:
         """执行 Interactor 构建。"""
         resolved, err = resolve_source(problem_dir, code, source_path)
-        if resolved is None:
+        if err is not None:
             return err
+        assert resolved is not None
 
         os.makedirs(problem_dir, exist_ok=True)
         files_dir = os.path.join(problem_dir, "files")

src/autocode_mcp/tools/solution.py

@@ -83,8 +83,9 @@ async def execute(
     ) -> ToolResult:
         """执行解法构建。"""
         resolved, err = resolve_source(problem_dir, code, source_path)
-        if resolved is None:
+        if err is not None:
             return err
+        assert resolved is not None
 
         # 确保目录存在
         os.makedirs(problem_dir, exist_ok=True)

src/autocode_mcp/tools/validator.py

@@ -91,8 +91,9 @@ async def execute(
     ) -> ToolResult:
         """执行 Validator 构建。"""
         resolved, err = resolve_source(problem_dir, code, source_path)
-        if resolved is None:
+        if err is not None:
             return err
+        assert resolved is not None
 
         # 确保目录存在
         os.makedirs(problem_dir, exist_ok=True)