Regex Tester & Validator

This regex matches patterns where a command name (a word) is followed by the phrase 'returned:' and then captures the rest of the line or text as output. With the g, m, and s flags, it works globally across multiline strings, and the dot matches newlines, so it can capture multi-line command output. It is useful for parsing logs or outputs from tools like Auto-GPT, where commands are reported with their return values.