MP3 instead of WAV-only, flexible config format, 3-4 channel scope,
and verified hardware details for the Pi 400 target.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Captures all functional and non-functional requirements from the
requirements interview: simultaneous CB frequency monitoring, NFM
demodulation, squelch-based activity detection, automatic WAV
recording with conversation grouping, YAML config, and console logging.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>