Organization repository on GitHub
Jev System One for Claude Code — typed Choice/Noul/Score via live TypeSafe API (mirror of opencode-openjev, live-only MCP)
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- 0
- Last pushed
- Updated Sep 2026
Repo stats from the GitHub API, cached Oct 2026.
Jev directory
CommunityJev Integrations & Adapters
OpenJev for Claude Code
A Claude Code plugin that adds five Jev tools — jev_choice, jev_noul, jev_score, jev_ask and jev_doctor — so small decisions like safety checks, tool choices and review verdicts come back as typed answers with calibrated confidence, labelled auto or escalate.
- Stars
- 2
- Language
- JavaScript
- License
- MIT
- Reading time
- 3 min
- Published by
- Community
- Author
- darwintechlab
- Last verified
- Oct 2026
- Languages
- JavaScript
- Capabilities
- Open sourceRequires API key
Highlights
- Installing the plugin adds five tools through the bundled MCP server jev: jev_choice, jev_noul, jev_score, jev_ask and jev_doctor, used by default via a skill.
- The README reports about 0.3 s per decision (live bench p50 307 ms) and about $0.017 per 1,000 decisions, with no output-token cost.
- Up to 32 questions ride in one call; 27 questions took about 5 ms longer than 1 in the project's tests.
- Every answer is labelled auto (confident enough to act on) or escalate (should go to the LLM or a person).
- MIT, Node 20 or newer, current Claude Code with plugin userConfig support, with a three-minute setup guide.
Watch out
Copy reviewed against the repo README on 2026-10-15; it was truncated inside the 'How it works in Claude Code' section, so the live-only MCP details below that point were not inspected. The latency, cost and confidence figures are the project's own benchmark results, and the GitHub description calls the repo a mirror of the opencode OpenJev plugin.
Questions about this entry
Short answers drawn from the linked project or page.
A plugin that gives a Claude Code agent a model built for its small decisions: is this command safe, which tool fits this task, is this PR ready, how serious is this bug. You pass text and possible answers; Jev returns the answer that fits plus a calibrated confidence, and it never writes free text.
It gives Claude five tools through the bundled MCP server jev: jev_choice, jev_noul, jev_score, jev_ask and jev_doctor. Claude can call them whenever it reaches a decision, and the bundled skill makes Claude use the tools by default without being asked.
The README reports about 0.3 s per decision, with a live benchmark p50 of 307 ms, and about $0.017 per 1,000 decisions; you do not pay for output tokens. Several questions share one call: up to 32, and 27 questions took about 5 ms longer than 1 in the project's tests.
Every answer is labelled auto when Jev is confident enough to act on it, or escalate when it should go to the LLM or a person. The README's example routes a clear billing ticket at 0.99 confidence automatically, while a vague one comes back at 0.38 and is flagged for a person.
It does not write code, summaries or explanations, and it cannot answer questions that lack a fixed set of answers. The README positions it alongside the LLM, handling the small decisions so the LLM does not have to.
MIT licensed, Node 20 or newer, and a current Claude Code with plugin userConfig support, plus the hosted Jev decision model reached through TypeSafe; the README points to a three-minute setup guide. It is maintained by darwintechlab.com, darwinevo.com and the community.
The GitHub description calls this repo a mirror of opencode-openjev with a live-only MCP, so the concepts and tool set match the opencode plugin while targeting Claude Code. The digest's README is truncated in the setup section, so version history and support commitments cannot be checked from it.
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