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Compose typed Jev judgments as reactive semantic state in React and backend programs
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Jev Hooks
A TypeScript library that treats typed semantic judgments as React hooks or plain server programs: pass one judgment's result into the next and the runtime works out the dependency, waits for fresh answers and batches compatible questions.
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- 1
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- TypeScript
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- microchipgnu
- Last verified
- Oct 2026
About this project
GitHub · npm · Documentation · React quickstart · Next.js / Vercel · Cloudflare Workers. Jev Hooks derives typed semantic values from ordinary application state. Pass one hook's result into another: the runtime discovers the dependency, waits for fresh answers, batches compatible questions and reuses unchanged interpretations.
Quoted from the project's README. Read the full README.
Works forJev for Classification
Used inJev for Software & DevTools
- Languages
- TypeScript
Highlights
- Two entry points from one package: jev-hooks/react for useChoice, useNoul and useScore with a JevProvider, and a server run() for Node and Cloudflare Workers.
- Composition is by reference, not by name: no judgment names, readiness flags or dependency arrays, and generations block stale responses.
- Judgments with identical normalized state share one microbatch in the SDK client; dependent hooks wait for fresh answers in later passes.
- Public API question IDs stay an audited transport contract, so renaming an internal question does not silently rewire your dependency graph.
Watch out
This is an independent library, not the official TypeSafe SDK. React is an optional peer dependency, and development needs Node 24 and pnpm 10.33.0. Without an explicit adapter, run() defaults to OpenRouterJevAdapter reading OPENROUTER_API_KEY, and library calls do not load .env automatically even though the example CLIs do; live inference can instead go through a Cloudflare AI binding or the official TypeSafe SDK with TYPESAFE_API_KEY. Everything in the bundled demos uses synthetic mock answers, so what you see locally is not model output. The included Worldline monitor is a demo that raises an on-screen alert and performs no external notification or transaction. Copy reviewed against the repository README on 2026-10-04, not from running it.
Questions about this entry
Short answers drawn from the linked project or page.
It is an independent library and says so plainly. For live calls it can go through the Cloudflare AI binding or the official TypeSafe SDK with TYPESAFE_API_KEY and an optional TYPESAFE_DEFAULT_MODEL, and the default server adapter is OpenRouter. The library itself is the part that adds typed hooks, reference-based composition, ambient scope and batching on top of whatever inference path you choose.
Structural keys, generations and aborted subscriptions prevent old responses from activating against new facts, and dependent hooks wait for fresh upstream answers before they run, forming later inference passes. On the React side you also get debouncing, previous data, loading and error state, cancellation and stale-response protection, with a debounceMs option per hook.
Yes. The demos use synthetic mock answers and need no credentials: pnpm demo:triage, demo:research, demo:clock and demo:replay, plus the Worldline simulated replay under pnpm demo:monitor, which replays a scripted event sequence. Live variants such as pnpm demo:triage:live make paid inference calls and want OPENROUTER_API_KEY, and MockJudgmentAdapter lets you drive your own tests the same way.
You pass one hook's result straight into the next judgment's state, and the runtime discovers the dependency, waits for fresh answers, batches compatible questions and reuses unchanged interpretations. You do not declare names, readiness flags or dependency arrays. What you do not get is implicit wiring through identifiers: the public API question IDs remain an audited transport contract rather than the mechanism that connects judgments.
Install with npm install jev-hooks. In React, import hooks from jev-hooks/react and wrap components in a JevProvider; on the server, import run() from jev-hooks and use it on Node or Cloudflare Workers. Add [email protected] and @types/node@24 as dev dependencies, and import from jev-hooks, not jev-runtime/native.
run() falls back to OpenRouterJevAdapter and reads OPENROUTER_API_KEY, and library calls do not load .env automatically even though the example CLIs do. Pass trace: true for a formattable execution trace, MockJudgmentAdapter for synthetic answers, or a Cloudflare AI binding or the official TypeSafe SDK for live inference.
It is an event-driven world situation monitor built on the same library: structured events reduce into deterministic facts, useChoice, useNoul, and useScore maintain a semantic graph, and React renders its meaning. An answer of at least 0.8 raises an on-screen alert, and it performs no external notification or transaction.
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