{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://perrylink.github.io/dsh-attention-index/contribution.schema.json",
  "title": "DSH Community Bench Contribution",
  "description": "One opt-in trajectory receipt. It carries hashes and aggregate metrics, not the raw session. Contributions produce contributor credits, a small demand signal, and at most one nomination for an under-evaluated plugin; they never substitute for a paired bench result.",
  "type": "object",
  "additionalProperties": false,
  "required": [
    "schema",
    "contributionId",
    "contributor",
    "createdAt",
    "surface",
    "quality",
    "price",
    "verification",
    "sessionHash",
    "textHash"
  ],
  "properties": {
    "schema": { "const": "dsh-attention/contribution/v1" },
    "contributionId": { "type": "string", "minLength": 1 },
    "contributor": {
      "type": "string",
      "minLength": 2,
      "maxLength": 80,
      "description": "Public identity, for example github:perrylink. Never an email address."
    },
    "createdAt": { "type": "string", "format": "date-time" },
    "surface": { "type": "string", "minLength": 1 },
    "plugins": {
      "type": "array",
      "items": { "type": "string", "minLength": 1 },
      "description": "Plugin ids installed in the session that produced the trajectory."
    },
    "quality": { "type": "number", "minimum": 0, "maximum": 100 },
    "price": { "type": "integer", "minimum": 0, "maximum": 60 },
    "verification": { "enum": ["self", "replay", "replicated"] },
    "sessionHash": { "type": "string", "pattern": "^sha256:[a-f0-9]{64}$" },
    "textHash": { "type": "string", "minLength": 8, "maxLength": 128 },
    "metrics": {
      "type": "object",
      "additionalProperties": false,
      "properties": {
        "turns": { "type": "integer", "minimum": 0 },
        "steps": { "type": "integer", "minimum": 0 },
        "toolCalls": { "type": "integer", "minimum": 0 },
        "toolErrors": { "type": "integer", "minimum": 0 },
        "tokens": { "type": "integer", "minimum": 0 }
      }
    },
    "nomination": {
      "type": "string",
      "minLength": 1,
      "description": "One plugin id to nominate for a future bench run. Under-evaluated plugins are prioritised."
    },
    "signature": {
      "type": "string",
      "description": "Optional Ed25519 signature over the canonical JSON without this field."
    }
  }
}