- questions: extracted from config.yaml into config/questions.yaml (committed, like optical_flow_config.yaml) - optical_flow_config_file and questions_config_file are now required fields - data_dir and out_dir are now required (no defaults) - filenames: trimmed to input-only in example; output filenames stay as code defaults - annotator: remove optional guard around optical flow config loading Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>