Usage: photoc [global options] focus <file|directory> [--recursive] [--threshold <value>] [--only-blurry] [--json]
       photoc focus --help

Compare JPEG sharpness scores

Status: available for JPEG files (read-only)

Example:
  photoc focus photo.jpg
  photoc focus ~/Pictures --recursive
  photoc focus ~/Pictures --threshold 100 --only-blurry
  photoc focus photo.jpg --json

Options:
  --recursive          Include nested directories
  --threshold <value>  Nonnegative review cutoff (default: 100)
  --only-blurry        List only scores below the threshold
  --json               Print structured JSON

Rows are sorted by score ascending, then path; summaries include all analyzed JPEGs.
Possibly blurry is a review hint, not certainty; no universal cutoff exists.
Noise, texture, subject matter, and JPEG artifacts affect scores.
