Fixes to agent docs pt2

docs/tutorials/build-code-agent.mdx

@@ -32,7 +32,6 @@ The agent has access to powerful code viewing and manipulation tools powered by
 - `DeleteFileTool`: Delete files
 - `RenameFileTool`: Rename files
 - `EditFileTool`: Edit files 
-- `MoveSymbolTool`: Move symbols between files with import handling
 
 
 
@@ -68,6 +67,8 @@ agent = CodeAgent(
 )
 ```
 
+<Note>If using a non-default model provider, make sure to set the appropriate API key (e.g., `OPENAI_API_KEY` for OpenAI models) in your env.</Note>
+
 # Available Tools
 
 The agent comes with a comprehensive set of tools for code analysis and manipulation. Here are some key tools:
@@ -179,5 +180,5 @@ class CustomCodeTool(BaseTool):
 
 # Add custom tool to agent
 tools.append(CustomCodeTool())
-agent = CodebaseAgent(codebase, tools=tools, model_name="gpt-4o")
+agent = CodebaseAgent(codebase, tools=tools, model_name="claude-3-5-sonnet-latest")
 ```

src/codegen/extensions/langchain/tools.py

@@ -53,11 +53,11 @@
 class ViewFileTool(BaseTool):
     """Tool for viewing file contents and metadata."""
 
     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.
 The response will indicate if there are more lines available to view."""
     args_schema: ClassVar[type[BaseModel]] = ViewFileInput
     codebase: Codebase = Field(exclude=True)
 
     def __init__(self, codebase: Codebase) -> None:
@@ -93,9 +93,9 @@
 class ListDirectoryTool(BaseTool):
     """Tool for listing directory contents."""
 
     name: ClassVar[str] = "list_directory"
     description: ClassVar[str] = "List contents of a directory in the codebase"
     args_schema: ClassVar[type[BaseModel]] = ListDirectoryInput
     codebase: Codebase = Field(exclude=True)
 
     def __init__(self, codebase: Codebase) -> None:
@@ -116,9 +116,9 @@
 class SearchTool(BaseTool):
     """Tool for searching the codebase."""
 
     name: ClassVar[str] = "search"
     description: ClassVar[str] = "Search the codebase using text search"
     args_schema: ClassVar[type[BaseModel]] = SearchInput
     codebase: Codebase = Field(exclude=True)
 
     def __init__(self, codebase: Codebase) -> None:
@@ -139,7 +139,7 @@
 class EditFileTool(BaseTool):
     """Tool for editing files."""
 
     name: ClassVar[str] = "edit_file"
     description: ClassVar[str] = "Edit a file by replacing its entire content. This tool should only be used for replacing entire file contents."
     args_schema: ClassVar[type[BaseModel]] = EditFileInput
     codebase: Codebase = Field(exclude=True)
@@ -255,6 +255,7 @@
         return result.render()
 
 
+# Note: a large file is over 300 lines. Please specify a range larger than the edit you want to make.
 _SEMANTIC_EDIT_BRIEF = """Tool for file editing via an LLM delegate. Describe the changes you want to make and an expert will apply them to the file.
 
 Specify the changes you want to make in the edit_content field, with helpful comments, like so: