file.import without the flag (scripts, agents, files opened from the command line,
the CLI's templates) turned `lockin_line1.png` into a one-frame image sequence.
ImportOptions.sequence defaults to false in After Effects, so picked and dropped files
now import as stills unless `sequence: true`; folders' numbered runs still import as
sequences, and the Import dialog's Sequence checkbox is unchanged.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>