Checklist: file_naming_convention

File/Directory Creation/Rename/Move

All new files and directories use snake_case (lowercase, digits, underscores only)
No spaces or special characters in file/directory names
Hyphens (-) used only in docker-compose.yaml, docker-compose.yml, package-lock.json, yarn.lock, pnpm-lock.yaml
UPPER_SNAKE_CASE used only for root-level configuration constants (e.g., CONFIG.json, Dockerfile)
Forbidden extensions (.pdf, .pptx, .docx, .xlsx, .csv, .zip, .pth, .png, .jpg, .jpeg, .gif, .bmp, .tiff, .webp, .mp4, .mov, .avi, .dcm, .nii, .nii.gz) are not present in the repository
Any file under LEGACY/ that is modified includes an inline comment # LEGACY: explaining the change
Test files follow the pattern: tests/<same_path_as_source>/test_<source_filename>

Check all created/renamed/moved files for snake_case naming
Verify hyphen usage is limited to allowed files: docker-compose.yaml/.yml, package-lock.json, yarn.lock, pnpm-lock.yaml
Confirm UPPER_SNAKE_CASE appears only for root config files
Scan for forbidden file extensions
Inspect any changes in LEGACY/ directory for required comment
Validate test file placement matches source file structure