fn strip_conversational_preamble(s: &str) -> Option<String>Expand description
Strip one leading conversational-filler opener (see
CONVERSATIONAL_PREAMBLES) and re-capitalize the new first letter, so
“Yeah, let’s debug the bug” becomes “Debug the bug” — matching the
direct-instruction register every ambient-call prompt asks for. Returns
None if no known opener matches (left alone rather than guessed at —
this list is deliberately not exhaustive NLP-style filler detection,
just the handful of openers a model actually reaches for here).