#3834 providing validation for specialized FlyteFormat types Issue created by zeryx Motivation: Why do you think this is important? This issue revolves around the fact that today, specialized filetypes within Flyte are not validated to actually conform to the requested type - just the file type metadata is provided to s3. This means I could store a png image as a JPEGImageFile object, which could end up adding a lot of confusion to end users who may expect JPEGImageFile types to be validated. Goal: What should the final outcome look like, ideally? Ideally, there should be a mechanism at runtime that validates that a particular file actually corresponds to the format requested. If I had a PDFFile type, I would expect to be able to ensure that the actual serialized file is a PDF type. Describe alternatives you've considered https://en.wikipedia.org/wiki/File_(command) ^ Previously used this in other projects to verify image format and filetype. Checking file extensions is also a potential mechanism for validation (albeit a much worse one) Propose: Link/Inline OR Additional context example of a wf that succeeds (when it shouldn't) https://gist.github.com/zeryx/31266bbe21d4dcfeca9f1b0e7dc3a883 Are you sure this issue hasn't been raised already? ☑︎ Yes Have you read the Code of Conduct? ☑︎ Yes flyteorg/flyte