Vault test builder
Minimal pairs, read-aloud prompts, fast speech, and practical spoken responses. 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.
Turns listening and speaking inventory into a compact pressure session.
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.
Mechanics
Family mix
Visual and simulation mechanics 12
Skill mix
Real life 12
Review status
generated-review-candidate 12
Find the target objects in the scene.
Use multiple choice when all distractors map to a clear learner trap.
Diagnostic signal
Hidden object vocabulary scene produces a real life signal at B2.
Conversion hook
Visual search makes vocabulary feel like a game.