evaluate( )

Pattern

Jev Output Verifier

Write an answer, then show it only if Jev is at least 90% sure it actually answers the question. If not, rewrite once.

BeginnerSep 2026View the full pattern on desktop
Jev Output Verifier preview

Problems solved

  • Gate a generated draft with one boolean probability
  • Regenerate once when the draft misses the ship floor
  • Keep the verify threshold in application code

Use cases

  • Answer verification before showing a draft
  • One-retry regeneration floors
  • Teaching Jev boolean probabilities on generated text

AI SDK APIs

experimental_evaluategenerateTextgateway

Tags

jevevaluationtyped-decisionsbooleangenerate-textai-sdk

Requirements

Node.js
24+
Memory
256MB
Other
  • Vercel AI Gateway API key

Environment variables

External services

vercel-ai-gatewayupstash

Ready to use?

View the full interactive pattern with live preview and copy the source code.

View the pattern on desktop

Related patterns

Jev Loop BreakerLook up facts one step at a time. Stop when Jev is at least 90% sure the notes answer the task, or after 3 lookups.Sep 2026
Jev Semantic ClusteringDiscover themes in comments with no labels up front. Embeddings pick likely pairs, Jev answers one boolean per pair, and code does the grouping.Oct 2026
Jev Entity ResolutionResolve messy card statement descriptors to the merchants behind them. Code blocks and vetoes, Jev answers one boolean per pair, and unsure matches wait for review.Oct 2026
Jev Sub-agent DelegationPick one specialist with a Jev choice, then run only that agent when confidence and selected probability both clear their floors.Sep 2026