Chooses between the four mainstream synthetic test-data generators - Faker (JavaScript), FactoryBot (Ruby), mimesis (Python), Bogus (.NET) - picks the right tool by language and use case (raw value generation vs. typed factory orchestration), shows side-by-side equivalents for the same fixture across all four, and emits the language-appropriate code. Use when starting test-data work on a project and the team wants the "which tool should I use" decision documented.