How does the plugin give agents access to Jev?

It registers the three primitives as tools: noul returns a yes/no probability, choice returns a selected label with its distribution and confidence, and score rates an ordered scale with distribution and confidence, and each call can override the default model.

Which DeepSeek Harness versions are supported?

Version 0.1.1 targets DeepSeek Harness 0.2.1-alpha.2 and declares compatibility back through 0.2.0-rc.2, 0.1.7-rc.2 and 0.1.6-alpha.2; the README says other versions have not been individually verified.

How is the tool risk gate configured?

guard.enabled turns on a tools/pre-execute check with ordered levels low, medium, high and critical; denyAt (3 by default) denies, askAt (1) requests approval, low confidence escalates, and guard.onError chooses fail-open or fail-closed.

What happens when the Jev API fails or gets slow?

With policy enabled, a circuit breaker opens after 5 consecutive failures, stays open 30 seconds before a probe call, and a minimum interval of 200 ms paces requests; retries default to 3 attempts with 500 ms base backoff capped at 5 seconds.

Can any rules run without an API key?

Yes. rules.enabled adds synchronous offline denial rules: case-insensitive regexes that need no API key, a tools list to scope them, and load-time failure for invalid patterns.

How do I install it into a DSH profile?

Initialize a Web profile with dsh --profile jev-dev --from-default-profile web --dump-config, then dsh plugin --profile jev-dev add with a local path, the GitHub tag github:jackie-cqz/dsh-jev-plugin#v0.1.1, or the prebuilt .tgz from the release, which needs no compilation.

What does the plugin send and store?

Configuration covers apiKey or apiKeyEnv (TYPESAFE_API_KEY by default), the api.typesafe.ai base URL, model jev-latest and a 10-second timeout; request state is capped by maxStateChars at 64,000 and the optional cache keys on model, state and questions.

CommunityJev Agents & MCP

DSH Jev Plugin

A DeepSeek Harness plugin that exposes Jev's noul, choice and score primitives as agent tools, plus configurable guardrails, retries, response caching, a circuit breaker and Web UI result cards.

See highlights

Open github.com

Stars: 8
Language: TypeScript
License: MIT
Published by: Community
Author: jackie-cqz
Last verified: Oct 2026

jackie-cqz/dsh-jev-plugin

User repository on GitHub

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DeepSeek Harness plugin for TypeSafe Jev: typed decisions, configurable guardrails, and Web UI result cards.

Forks: 1
Last pushed: Updated Oct 2026

Repo stats from the GitHub API, cached Oct 2026.

Tagscommunity typescript deepseek plugin guardrails

Works forJev for Tool calling Jev for Decision gating Jev for Classification

Used inJev for Software & DevTools

Languages: TypeScript
Platforms: CLI
Capabilities: Open sourceRequires API key

Highlights

Exposes noul (a 0-1 probability), choice (label plus distribution and confidence) and score (an ordered scale) as agent tools.
Guard rail before tools execute: four risk levels, deny at 3, ask at 1, with fail-open or fail-closed chosen by config.
Circuit breaker opens after 5 consecutive failures for 30 seconds and paces calls with a 200 ms minimum interval when policy is on.
Response cache keys on model, state and questions, with 100 entries, LRU eviction and a 60-second lifetime.
782 plugin tests plus packaging-parser tests pass, tarball installs cover four DSH versions, and Chromium acceptance verifies four tool calls.

Watch out

MIT, version 0.1.1, targeting DeepSeek Harness 0.2.1-alpha.2 with a declared range back to 0.1.6-alpha.2; other versions are not individually verified, local builds need npm ci --legacy-peer-deps, and the tools call the hosted TypeSafe API with your key.

Questions about this entry

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Reactions & coverage

Posts, threads, and videos about this entry from around the web.

X: Agent Handoff Gate: agents verify what they hand off

X: Jev as an LLM guardrail inside Agentgateway

X: Vercel's fx safety reviewer, measured at 18× faster

Reddit: Early experiments wiring Jev into Pi as a safety layer and model router.

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