writing-cli-errors-and-exit-codes

To write clear CLI error messages, generate standardized output templates that identify the specific error condition, such as file not found or input validation, and provide actionable instructions for resolving the issue.

Standard exit code conventions define specific numeric values to signal success, general failure, or specific error conditions like authentication or network issues, ensuring your CLI tool supports reliable command line scripting.

Handle network and authentication errors in your CLI tool by generating standardized error messages that clearly communicate the access failure and returning specific exit codes to differentiate these issues from internal processing problems.

Command line script errors often lack actionable user feedback because they do not adhere to established best practices for CLI error handling, missing standardized templates that combine clear problem identification with resolution instructions.

The best way to define exit codes for developer tools is to establish consistent conventions that map specific numeric values to error scenarios like resource access issues or input validation, enabling scriptability and clear user feedback.