Evals · JSON Structure

Evals Scorer Structure

A function producing a score from (input, output, expected?, context?) — code, heuristic, LLM judge, human, reference-based, reference-free, or pairwise.

Type: object Properties: 11 Required: 3

EvalsLLM EvaluationAI QualityBenchmarksLLM as a JudgeObservabilityAgent EvaluationRAG EvaluationTest-Driven AI

Scorer is a JSON Structure definition published by Evals, describing 11 properties, of which 3 are required. It conforms to the https://json-structure.org/meta/core/v0/# meta-schema.

Properties

id name description type implementation judge_model judge_prompt scale threshold rubric tags

Meta-schema: https://json-structure.org/meta/core/v0/#

JSON Structure

{
  "$schema": "https://json-structure.org/meta/core/v0/#",
  "$id": "https://raw.githubusercontent.com/api-evangelist/evals/refs/heads/main/json-structure/evals-scorer-structure.json",
  "name": "Scorer",
  "description": "A function producing a score from (input, output, expected?, context?) — code, heuristic, LLM judge, human, reference-based, reference-free, or pairwise.",
  "type": "object",
  "properties": {
    "id": { "type": "string" },
    "name": { "type": "string" },
    "description": { "type": "string" },
    "type": {
      "type": "string",
      "enum": [
        "code",
        "llm_judge",
        "human",
        "heuristic",
        "reference_based",
        "reference_free",
        "pairwise"
      ]
    },
    "implementation": { "type": "string" },
    "judge_model": { "type": "string" },
    "judge_prompt": { "type": "string" },
    "scale": {
      "type": "object",
      "properties": {
        "min": { "type": "number" },
        "max": { "type": "number" },
        "step": { "type": "number" },
        "kind": {
          "type": "string",
          "enum": ["continuous", "binary", "ordinal", "categorical"]
        }
      }
    },
    "threshold": { "type": "number" },
    "rubric": { "type": "string" },
    "tags": {
      "type": "array",
      "items": { "type": "string" }
    }
  },
  "required": ["id", "name", "type"]
}