Concepts
Jev Score
Score is Jev's ordered rubric primitive. It returns a probability-weighted value, a legend, and confidence.
- Published
- Sep 20, 2026
- Updated
- Sep 20, 2026
- Last verified
- Sep 20, 2026
Quick answer
A Score question rates state on an ordered rubric you define (2–10 levels). The answer includes a probability-weighted score that can land between levels, a legend, per-level probabilities, and confidence. Do not reconstruct an exact magnitude from a fractional score.
Score is for ordered judgments: severity, quality, experience, frustration. The order lives in the array you send. Level 0 is the first entry.
Request
{
"bug_severity": {
"type": "score",
"instructions": "How severe is the reported issue?",
"criteria": [
"Cosmetic; no impact on functionality",
"Broken or degraded feature, but a workaround exists",
"Blocking issue; no workaround exists"
]
}
}Official API: at least two levels, at most ten.
Response
{
"type": "score",
"score": 1.3,
"legend": {
"0": "Cosmetic; no impact on functionality",
"1": "Broken or degraded feature, but a workaround exists",
"2": "Blocking issue; no workaround exists"
},
"probabilities": { "0": 0.0, "1": 0.7, "2": 0.3 },
"confidence": 0.54
}1.3 is 0×0.0 + 1×0.7 + 2×0.3. A score of 1.0 can mean “all mass on level 1” or “half on 0 and half on 2”. Read probabilities and confidence before you act.
Write situations, not adjectives
Official guidance: “Broken feature, workaround exists” is matchable. “Moderately severe” is not. Levels are judged independently; “worse than the previous level” means nothing to the model.
Keep one dimension per Score. “Punctual and smart and experienced” cannot place a candidate who is only one of those. Split into three Scores and weight them in code (composite scoring).
When to use Score
Lead quality, bug severity, passage usefulness, customer frustration, skill level.
When not to use Score
- Unordered labels → Choice
- A clean true/false → Noul
- Reconstructing a dollar amount or a date from a fractional score. Official jaggedness notes say numerical calibration between levels is weak.
Common mistakes
- Using a Noul of 0.5 as “medium”. Medium is a Score problem.
- Thresholding
scorewithout looking at a U-shaped distribution. - Ten numeric labels (
"1"..."10") with no situational text.
See lead scoring and limitations.
FAQ
Why is the score 1.3 if I only defined whole levels?
score is the probability-weighted mean of level indices. 1.3 means most mass on level 1 with some on a neighbor.
Can I use Score as a 1–10 rating?
You can define ten descriptive levels. Official jaggedness notes warn against interpolating an exact number between levels.
Sources
- ScoreTypeSafe · accessed 2026-09-20 · documentation
- API referenceTypeSafe · accessed 2026-09-20 · documentation
- Jev 1.13 jaggednessTypeSafe · accessed 2026-09-20 · documentation