A Standardized Set of ASCII-Based 3-Character Prefixes for Command-Line Interface Standard Output and Plaintext Logs to Aid in Software Development by Humans and AI-Generated Source Code

Command-line interface (CLI) tools frequently emit status, diagnostic, and progress messages that in some cases are prefixed with short ASCII tokens containing anything from any printable characters (e.g. !, i, +, etc.), abbreviations (e.g. DEL, INS, etc.), to short verbal descriptors (e.g. "INFO:", "DELETE", "ALERT", etc.). Despite their ubiquity, use, and convenience, no standard defines these tokens or their semantics. This document proposes a machine- parseable, human-readable vocabulary of 3-character ASCII prefixes -- collectively referred to as "gclifixes" -- enclosed in square brackets [ ] for events and curly braces { } for context metadata. The goal is to enable consistent interpretation across CLI tools, log aggregators, CI/CD pipelines, IDE integrations, and most importantly for any AI-generated code the adoption of this standard will streamline how these are used and provides additional meaning to any prompt message and log file without additional effort.