What it is
A developer demo that analyzes a public SaaS landing page as clean Markdown and asks Jev ten bounded Choice questions about first-visit understanding, returning inspectable findings for the first change to make.
How it uses Jev
Jev receives clean Markdown from ReplyNodes as state and answers ten bounded founder questions (clarity, audience, value proposition, differentiation, reason to choose, CTA signal, trust, self-serve motion, copy specificity, change-first) plus optional Boolean, Choice, or Score questions in one evaluation through Vercel AI Gateway. Returned probabilities/confidence are preserved where available.
Primitives:choicescore
Technique worth stealing
Use a live web scrape as untrusted state for bounded probabilistic judgments.
Try it
Set REPLYNODES_API_KEY and AI_GATEWAY_API_KEY, then pnpm install and pnpm dev.
Evidence
Each line is one question put to Jev about the README. ≥ 0.60 reads as yes, ≤ 0.40 as no; in between Jev is not making a call.
- Jev-centricyes0.94
- Shows a System One patternyes0.78
- Handles uncertaintyno0.04
- Measuredno0.05
- Runnableunclear0.58
- Worth recommendingunclear0.57
- Model replicano0.03
- Problem scopescore on a 0–2 scale0.47
- About Jevyes0.98
Signals by Jev jev-1.13.0, card written by DeepSeek V4.1 Flash from the README on 20 Sept 2026.