Hi organizers @hyikesong, First, thank you very much for organizing MRIxFields 2026 and for maintaining such detailed submission and evaluation documentation. The validation pipeline and updated instructions are very helpful, and I really appreciate the effort behind the challenge infrastructure. I encountered an INVALID result for my Task 1 submission and checked the downloaded evaluation log. It looks like `get_submission.cwl` completed successfully, but `score-task1.cwl` passed the downloaded artifact directly to `score.py`: -i /var/lib/cwl/.../submission-9766436 The scorer then reported: FILE_TREE_ERROR: pred T1W/0.1T_to_7T: missing=['0001', '0002', '0003'] I checked my `task1.zip` locally. Its internal root directly contains `T1W/`, `T2W/`, and `T2FLAIR/`, and the files follow the updated slab format `(364, 436, 30)` for both prediction and segmentation. Could I kindly confirm the expected upload format for the current validation workflow? Should we upload: 1. a `task1.zip` file whose internal root contains `T1W/T2W/T2FLAIR`, as described in the Submission README; or 2. a Synapse folder/entity whose root directly contains `T1W/T2W/T2FLAIR`? From the log, it seems that `score.py` expects an already extracted directory and does not unzip the submitted archive itself. I wanted to confirm whether archive extraction is handled by the platform workflow, or whether participants should submit a folder instead. Thank you again for your help and for organizing this challenge.