Increase view file size limit (#852)

# Motivation

Window size for the ViewFile tool is too small

# Content

Increased the ViewFile tool window size to 500

# Testing
Tested with swe bench

# Please check the following before marking your PR as ready for review

- [ ] I have added tests for my changes
- [ ] I have updated the documentation or added new documentation as
needed

Author: jemeza-codegen

codegen-examples/examples/swebench_agent_run/.gitignore

@@ -0,0 +1 @@
+.env.db

src/codegen/extensions/langchain/tools.py

@@ -54,7 +54,7 @@ class ViewFileInput(BaseModel):
     filepath: str = Field(..., description="Path to the file relative to workspace root")
     start_line: int | None = Field(None, description="Starting line number to view (1-indexed, inclusive)")
     end_line: int | None = Field(None, description="Ending line number to view (1-indexed, inclusive)")
-    max_lines: int | None = Field(None, description="Maximum number of lines to view at once, defaults to 250")
+    max_lines: int | None = Field(None, description="Maximum number of lines to view at once, defaults to 500")
     line_numbers: bool | None = Field(True, description="If True, add line numbers to the content (1-indexed)")
 
 
@@ -63,7 +63,7 @@ class ViewFileTool(BaseTool):
 
     name: ClassVar[str] = "view_file"
     description: ClassVar[str] = """View the contents and metadata of a file in the codebase.
-For large files (>250 lines), content will be paginated. Use start_line and end_line to navigate through the file.
+For large files (>500 lines), content will be paginated. Use start_line and end_line to navigate through the file.
 The response will indicate if there are more lines available to view."""
     args_schema: ClassVar[type[BaseModel]] = ViewFileInput
     codebase: Codebase = Field(exclude=True)
@@ -85,7 +85,7 @@ def _run(
             line_numbers=line_numbers if line_numbers is not None else True,
             start_line=start_line,
             end_line=end_line,
-            max_lines=max_lines if max_lines is not None else 250,
+            max_lines=max_lines if max_lines is not None else 500,
         )
 
         return result.render()

src/codegen/extensions/tools/reflection.py

@@ -188,7 +188,7 @@ def perform_reflection(
         # Initialize the LLM
         llm = LLM(
             model_provider="anthropic",
-            model_name="claude-3-5-sonnet-latest",
+            model_name="claude-3-7-sonnet-latest",
             temperature=0.2,  # Slightly higher temperature for more creative reflection
             max_tokens=4000,
         )

src/codegen/extensions/tools/view_file.py

@@ -78,7 +78,7 @@ def view_file(
     line_numbers: bool = True,
     start_line: Optional[int] = None,
     end_line: Optional[int] = None,
-    max_lines: int = 250,
+    max_lines: int = 500,
 ) -> ViewFileObservation:
     """View the contents and metadata of a file.
 
@@ -88,7 +88,7 @@ def view_file(
         line_numbers: If True, add line numbers to the content (1-indexed)
         start_line: Starting line number to view (1-indexed, inclusive)
         end_line: Ending line number to view (1-indexed, inclusive)
-        max_lines: Maximum number of lines to view at once, defaults to 250
+        max_lines: Maximum number of lines to view at once, defaults to 500
     """
     try:
         file = codebase.get_file(filepath)

tests/unit/codegen/extensions/test_tools.py

@@ -114,9 +114,9 @@ def test_view_file_pagination(large_codebase):
     result = view_file(large_codebase, "src/large_file.py")
     assert result.status == "success"
     assert result.start_line == 1
-    assert result.end_line == 250  # Default max_lines
+    assert result.end_line == 500  # Default max_lines
     assert result.has_more is True
-    assert result.max_lines_per_page == 250
+    assert result.max_lines_per_page == 500
     assert "from __future__ import annotations" in result.content  # First line
     assert "def method_1" in result.content  # Early method
     assert "def method_251" not in result.content  # Method after page 1
@@ -141,8 +141,8 @@ def test_view_file_pagination(large_codebase):
     assert result.has_more is True
     assert "def method_69" in result.content  # Regular method
     assert "def class_method_80" in result.content  # Class method at 80
-    # Should show 250 lines from start (350 to 599)
-    assert result.end_line == 599
+    # Should show 500 lines from start (350 to 849)
+    assert result.end_line == 849
 
     # Test custom max_lines
     result = view_file(large_codebase, "src/large_file.py", max_lines=100)
@@ -191,13 +191,13 @@ def test_view_file_pagination_edge_cases(large_codebase):
     assert result.status == "success"
     assert result.start_line == 200
     # Should respect max_lines and file length
-    assert result.end_line == min(200 + 250 - 1, 2010)
+    assert result.end_line == min(200 + 500 - 1, 2010)
 
     # Test negative start_line (should default to 1)
     result = view_file(large_codebase, "src/large_file.py", start_line=-10)
     assert result.status == "success"
     assert result.start_line == 1
-    assert result.end_line == 250
+    assert result.end_line == 500
 
 
 def test_list_directory(codebase):