Guides writing product requirements as a PR-FAQ (press release plus frequently-asked-questions) using Amazon's working-backwards methodology, or as a lighter PRD when a PR-FAQ is overkill. Use when the user asks to "write a PR-FAQ", "write product requirements", "draft a PRD", "work backwards from the customer", "write a press release for a product that doesn't exist yet", or asks for a critique/review of an existing PR-FAQ or PRD draft.