What it is
An unofficial LlamaIndex adapter providing a reranker (JevRerank) and router selectors (JevSingleSelector, JevMultiSelector) powered by TypeSafe Jev, for RAG retrieval and tool selection.
How it uses Jev
JevRerank sends state {query, passage} per passage with a Score question (0-3 relevance) and keeps top_n. JevSingleSelector sends the query as state with a Choice over query engine tools; JevMultiSelector uses one Noul per option. Results select the engine or rerank order.
Primitives:scorechoicenoul
Technique worth stealing
One Jev call per passage for reranking; batch a single Choice or per-option Noul for routing.
Try it
pip install llama-index-postprocessor-jev or llama-index-selectors-jev; set TYPESAFE_API_KEY or OPENROUTER_API_KEY.
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 patternno0.34
- Handles uncertaintyno0.07
- Measuredyes0.95
- Runnableyes0.96
- Worth recommendingunclear0.53
- Model replicano0.08
- Problem scopescore on a 0–2 scale1.14
- About Jevyes0.98
Signals by Jev jev-1.13.0, card written by DeepSeek V4.1 Flash from the README on 20 Sept 2026.