Vault test builder
Fast phrase traps, collocations, emotion context, scene inference, and native-sounding choices. The generated prompt bank is now a product surface: choose an angle, pick source-language traps, and review a draft test that can become a funnel, challenge, or catalog diagnostic.
Product angles
Pick the hook first. The builder keeps the same 12k database underneath, but changes the question families and preferred mechanics.
Good for viral funnels that ask whether the learner sounds native or translated.
Level check
A mixed diagnostic from grammar, vocabulary, naturalness, listening, and real-life prompts.
Sound natural
Fast phrase traps, collocations, emotion context, scene inference, and native-sounding choices.
Business-ready
Emails, client-safe tone, meeting subtext, deadlines, and business collocations.
Speak better
Minimal pairs, read-aloud prompts, fast speech, and practical spoken responses.
Exam pressure
Academic reading, listening, writing, inference, and task-rubric prompts.
Travel survival
Airport, hotel, restaurant, shopping, instruction following, and object vocabulary.
Source language
Mechanics
Family mix
Media and pragmatics mechanics 30
Skill mix
Naturalness 30
Review status
generated-draft 25
generated-review-candidate 5
Choose the best answer.
Ask the learner to rank options before revealing the best order.
Diagnostic signal
Synonym intensity ladder produces a naturalness signal at C2.
Conversion hook
Short, diagnostic, and reusable across tests, funnels, and practice loops.