Automated README summary
Automatically summarized from the README on 20 Sept 2026; not a run by jevbooks. Run instructions and author-reported outcomes still need verification.
What it is
A Mastra input processor that moderates agent messages with TypeSafe Jev instead of an LLM, for teams that want a fast, cheap, fail-open block gate with no text to parse.
How it uses Jev
Jev answers two typed questions in one request over the last message's text: a `noul` probability for `blocking` (the gate) and a `choice` for `category` (logs only). The turn aborts when P(block) ≥ 0.7.
Primitives:noulchoice
Technique worth stealing
Ask a typed evaluation model for a probability instead of parsing a verdict out of generated text, so hostile input cannot produce an unparsable answer.
Try it
Copy `jev-moderation.ts` into the project, install `zod`, set `TYPESAFE_API_KEY`, and wire it as an `inputProcessor`.
Model judgments from README excerpts
Project signals use repository metadata, an existing summary and the first 700 README characters, not the full project. “Not found” means not detected in that material; it does not establish absence. These are the original judgments with recorded models and dates, not source audits or run results.
Models & evaluation dates
- Inclusion gate
jev-1.13.0- Project signals
jev-1.13.0- Category
jev-1.13.0- Pattern tags
jev-1.13.0
Evidence
These signals use repository metadata, an existing summary and at most 700 cleaned README characters. ≥ 0.60 means reported in that excerpt; ≤ 0.40 means not found there. The middle band is inconclusive. None is a source-code audit or a test result. The runnable-tool question excludes research experiments; the recommendation question asks for a learning shortlist, not a quality verdict.
- Jev is core to the projectFound in material0.95
- Shows a System One patternFound in material0.78
- Describes handling uncertaintyFound in material0.95
- Reports measured numbersFound in material0.97
- Is a runnable toolFound in material0.92
- Top-10 learning shortlist signalunclear0.59
- Is a replica of the modelnot found in the excerpt0.03
- Solves a common problem (0–2)score on a 0–2 scale1.33 / 2
- About JevFound in material0.99
no-judgment band (0.40–0.60)
no-judgment band (0.40–0.60)
The Jev model and date for each judgment stage are listed above. Card written by DeepSeek V4.1 Flash from the README on 20 Sept 2026.