_handle_insert() — langchain Function Reference

Source Code

libs/partners/anthropic/langchain_anthropic/middleware/anthropic_tools.py lines 965–1008

    def _handle_insert(self, args: dict, tool_call_id: str | None) -> Command:
        """Handle insert command."""
        path = args["path"]
        insert_line = args["insert_line"]
        text_to_insert = args["new_str"]

        full_path = self._validate_and_resolve_path(path)

        if not full_path.exists():
            msg = f"File not found: {path}"
            raise FileNotFoundError(msg)

        # Read file
        content = full_path.read_text()
        lines = content.split("\n")
        # Handle trailing newline
        if lines and lines[-1] == "":
            lines = lines[:-1]
            had_trailing_newline = True
        else:
            had_trailing_newline = False

        new_lines = text_to_insert.split("\n")

        # Insert after insert_line (0-indexed)
        updated_lines = lines[:insert_line] + new_lines + lines[insert_line:]

        # Write back
        new_content = "\n".join(updated_lines)
        if had_trailing_newline:
            new_content += "\n"
        full_path.write_text(new_content)

        return Command(
            update={
                "messages": [
                    ToolMessage(
                        content=f"Text inserted in {path}",
                        tool_call_id=tool_call_id,
                        name=self.tool_name,
                    )
                ]
            }
        )