prompt-atoms-rule-v1

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://prompt-atoms.com/schemas/rule-v1.json",
  "title": "prompt-atoms v1 rule",
  "description": "A rule constrains how atoms and compositions can be combined. Examples: model-compatibility, token-length-constraint, format-compatibility.",
  "type": "object",
  "required": ["schema", "type", "id", "version", "name", "predicate", "effect"],
  "additionalProperties": false,
  "properties": {
    "schema": {
      "type": "string",
      "const": "https://prompt-atoms.com/schemas/rule-v1.json"
    },
    "type": {
      "type": "string",
      "enum": ["model-compatibility", "token-length-constraint", "format-compatibility"]
    },
    "id": {
      "type": "string",
      "pattern": "^[a-z0-9][a-z0-9-]{1,62}[a-z0-9]$"
    },
    "version": {
      "type": "string",
      "pattern": "^[0-9]+\\.[0-9]+\\.[0-9]+(?:-[A-Za-z0-9.-]+)?$"
    },
    "name": { "type": "string", "minLength": 1, "maxLength": 80 },
    "description": { "type": "string", "maxLength": 500 },
    "tags": {
      "type": "array",
      "items": { "type": "string", "minLength": 1, "maxLength": 40 },
      "uniqueItems": true
    },
    "vendors": {
      "type": "array",
      "items": { "type": "string", "enum": ["claude", "gpt", "llama", "gemini", "mistral", "any"] },
      "uniqueItems": true
    },
    "predicate": {
      "type": "object",
      "required": ["subject_ref", "condition", "value"],
      "additionalProperties": false,
      "properties": {
        "subject_ref": {
          "type": "string",
          "pattern": "^prompt-atoms://(atoms|prompts|rules)/[a-z-]+(?:/[a-z0-9-]+)?$"
        },
        "condition": {
          "type": "string",
          "enum": ["eq", "neq", "in", "not_in", "gte", "lte", "matches"]
        },
        "value": {}
      }
    },
    "effect": {
      "type": "string",
      "enum": ["require", "forbid", "warn"]
    },
    "rationale": { "type": "string", "maxLength": 500 }
  }
}