userPromptKeywords.ts contains a regex pattern that detects user frustration:

/\b(wtf|wth|ffs|omfg|shit(ty|tiest)?|dumbass|horrible|awful| piss(ed|ing)? off|piece of (shit|crap|junk)|what the (fuck|hell)| fucking? (broken|useless|terrible|awful|horrible)|fuck you| screw (this|you)|so frustrating|this sucks|damn it)\b/

An LLM company using regexes for sentiment analysis is peak irony, but also: a regex is faster and cheaper than an LLM inference call just to check if someone is swearing at your tool.

🔖 https://alex000kim.com/posts/2026-03-31-claude-code-source-leak

🔗 https://blog.giersig.eu/likes/c0997/