eve
Vercel's agent framework with Jev wired into the experimental evaluate path, so scoring stays typed.
Overview
eve is Vercel's open, filesystem-first agent framework (agent/instructions.md, tools/, skills/, channels/). This directory indexes it because public eve materials describe Jev on the experimental evaluate path for typed scoring; confirm shapes on eve.dev for your pinned version.
Problem: Durable agent frameworks need evaluation hooks that stay testable instead of free-form judge prompts.
Built for: TypeScript teams building filesystem-first agents on Vercel who want structured evaluation alongside tools and skills.
First indexed on Jev Directory: 2026-09-17
Creator and team
- Name
- Vercel
- Organization
- Vercel
How Jev is used
- Role in the product flow
- Agent evaluation (experimental evaluate path per listing and eve marketing)
- Primitives
- ChoiceScoreNoul
- State in
- Structured evaluation payloads as documented on eve.dev for the evaluate integration (verify in your version pin).
- Decision out
- Thresholdable evaluation scores used in agent workflows instead of unparsed judge prose.
- Author agent under agent/ layout
- Call evaluate path with structured questions
- Apply thresholds in TypeScript policy code
eve keeps orchestration in conventional files while evaluation can call System One through the experimental path described in this site's catalog listing and on eve.dev. This profile does not duplicate eve's full evaluate API: read Vercel's docs for the exact question schema, models, and gateway configuration in the release you deploy.
Features and stack
Features
- npx eve@latest init scaffolding
- Filesystem-first agent layout
- Channels and schedules for durable agents
- Hosted docs at eve.dev
Stack
- TypeScript
- Vercel AI Gateway compatible flows
- TypeSafe System One evaluate path
Links
FAQ
- Where is Jev configured in eve?
- Follow eve.dev/docs for evaluate integration in your release. This directory listing summarizes Jev as the default evaluation model on the experimental evaluate path.
Related learn guides
Original Jev guidance that pairs with this product pattern.
- Vercel AI Gateway Jev
Try typesafe-ai/jev through Vercel's gateway and the AI SDK evaluate path.
- System One model
The model family behind Jev: parallel typed questions, one forward pass, probabilities you can threshold.
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