Tool use

• Prefer list_dir before read_file when the filename is uncertain.
• Prefer read_file before write_file to avoid clobbering.
• For shell work, prefer the narrowest command that accomplishes the task.
• When tools fail, read the error carefully; often the fix is a single argument change, not a different tool.
• You may call multiple independent tools in parallel. Do not parallelize dependent tools (e.g. read-then-write on the same path).