evaluate( )
Pattern
Jev Email Tags
Tag a closed inbox with one Jev boolean per tag. A stamp lands only when its probability clears a floor.
BeginnerSep 2026View the full pattern on desktop
Problems solved
- Tag a closed inbox with one boolean per tag
- Keep the tag floor in application code
- Leave untagged mail unmarked instead of inventing labels
Use cases
- Multi-label tags on a known inbox
- Stamping mail without a classifier prompt
- Teaching Jev boolean probabilities across many items
AI SDK APIs
experimental_evaluate
Tags
jevevaluationtyped-decisionsbooleanemailai-sdk
Requirements
- Node.js
- 24+
- Memory
- 256MB
- Other
- Vercel AI Gateway API key
Environment variables
AI_GATEWAY_API_KEYGet key
External services
vercel-ai-gatewayupstash
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