no-silent-assumptions

MANDATORY before declaring code "done", "ready", or ending a turn after working with anything you couldn't fully verify — an environment you didn't inspect, a data shape you inferred, an API whose behavior you didn't test, an edge case you decided not to handle. Forces you to track every material guess while working and surface them in a short "Assumptions:" block before claiming done. Triggers on "I'll assume", "assuming the API returns", "probably fine", "should work", "not sure if", "guessing this is", "the data is presumably", "I didn't test", any inferred schema/env/config value.