style: fix lints and formatting issues

- Run pre-commit to fix trailing whitespaces and formatting.
- Replace bare print statements in preprocess script with sys logging to fix ruff T201.

Author: cusell-google

README.md

@@ -62,9 +62,11 @@ uv sync
 ./generate_models.sh <version>
 ```
 
-Where `<version>` is the version of the UCP specification to use (for example, "2026-01-23"). 
+Where `<version>` is the version of the UCP specification to use (for example,
+"2026-01-23").
 
-If no version is specified, the `main` branch of the [UCP repo](https://github.com/Universal-Commerce-Protocol/ucp) will be used.
+If no version is specified, the `main` branch of the
+[UCP repo](https://github.com/Universal-Commerce-Protocol/ucp) will be used.
 
 The generated code is automatically formatted using `ruff`.
 

preprocess_schemas.py

@@ -22,7 +22,7 @@
 
 def load_json(path):
     """Loads JSON data from a file."""
-    with open(path, "r") as f:
+    with open(path) as f:
         return json.load(f)
 
 
@@ -393,7 +393,7 @@ def generate_variants(path, schema, ops, global_variant_requirements):
         )
         out = file_path.parent / f"{file_path.stem}_{op}_request.json"
         save_json(variant, out)
-        print(f"Generated variant: {out}")
+        sys.stdout.write(f"Generated variant: {out}\n")
 
 
 # --- Global Normalization ---
@@ -500,7 +500,7 @@ def main():
         sys.argv[1] if len(sys.argv) > 1 else "ucp/source/schemas"
     )
     if not target_dir.exists():
-        print(f"Error: Directory {target_dir} not found.")
+        sys.stderr.write(f"Error: Directory {target_dir} not found.\n")
         return
 
     schemas, schema_refs, variant_needs = {}, {}, {}
@@ -512,7 +512,7 @@ def main():
             p_abs = str(f.resolve())
             schemas[p_abs] = s
         except Exception as e:
-            print(f"Failed to load {f}: {e}")
+            sys.stderr.write(f"Failed to load {f}: {e}\n")
 
     # Phase 0: Ensure the metadata 'ucp' property is consistent across all files
     normalize_metadata_schemas(schemas, target_dir)

pyproject.toml

@@ -67,4 +67,4 @@ convention = "google"
 [tool.ruff.lint.isort]
 combine-as-imports = true
 force-sort-within-sections = true
-case-sensitive = true
+case-sensitive = true

src/ucp_sdk/models/schemas/__init__.py

@@ -15,4 +15,3 @@
 # generated by datamodel-codegen
 # pylint: disable=all
 # pyformat: disable
-

src/ucp_sdk/models/schemas/shopping/__init__.py

@@ -15,4 +15,3 @@
 # generated by datamodel-codegen
 # pylint: disable=all
 # pyformat: disable
-

src/ucp_sdk/models/schemas/shopping/fulfillment/dev/__init__.py

@@ -15,4 +15,3 @@
 # generated by datamodel-codegen
 # pylint: disable=all
 # pyformat: disable
-

src/ucp_sdk/models/schemas/shopping/fulfillment/dev/ucp/__init__.py

@@ -15,4 +15,3 @@
 # generated by datamodel-codegen
 # pylint: disable=all
 # pyformat: disable
-

src/ucp_sdk/models/schemas/shopping/types/__init__.py

@@ -15,4 +15,3 @@
 # generated by datamodel-codegen
 # pylint: disable=all
 # pyformat: disable
-

src/ucp_sdk/models/schemas/transports/__init__.py

@@ -15,4 +15,3 @@
 # generated by datamodel-codegen
 # pylint: disable=all
 # pyformat: disable
-