{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://raw.githubusercontent.com/Godman-s/aiax/main/schemas/section.schema.json",
  "title": "AIAX Capability Section (Tier 1)",
  "description": "A single capability section at /aiax/sections/<section_id>.json. Target size: 200-1,000 tokens.",
  "type": "object",
  "required": [
    "aiax_version",
    "section_id",
    "purpose",
    "inputs",
    "outputs",
    "pricing",
    "examples",
    "pact_mandate_template"
  ],
  "properties": {
    "aiax_version": {
      "type": "string",
      "enum": ["0.1"]
    },
    "section_id": {
      "type": "string",
      "description": "Matches the entry_points[].id in the Tier 0 manifest.",
      "pattern": "^[a-z0-9][a-z0-9_-]{0,60}$"
    },
    "purpose": {
      "type": "string",
      "description": "One-paragraph description of what this capability does.",
      "maxLength": 600
    },
    "inputs": {
      "oneOf": [
        {
          "type": "object",
          "description": "Inline JSON Schema for the input.",
          "additionalProperties": true
        },
        {
          "type": "string",
          "description": "Prose description (use only if JSON Schema is not yet authored).",
          "maxLength": 400
        }
      ]
    },
    "outputs": {
      "oneOf": [
        {
          "type": "object",
          "description": "Inline JSON Schema for the output.",
          "additionalProperties": true
        },
        {
          "type": "string",
          "maxLength": 400
        }
      ]
    },
    "pricing": {
      "type": ["object", "null"],
      "additionalProperties": false,
      "required": ["model", "amount", "currency", "rail"],
      "properties": {
        "model": {
          "type": "string",
          "description": "Pricing model: per_call, per_minute, per_token, flat, free, subscription.",
          "enum": ["per_call", "per_minute", "per_token", "flat", "free", "subscription"]
        },
        "amount": {
          "type": "string",
          "description": "Amount as a string to preserve precision.",
          "pattern": "^[0-9]+(\\.[0-9]+)?$"
        },
        "currency": {
          "type": "string",
          "description": "Currency code (e.g. USDC, USD, ETH, EUR).",
          "maxLength": 10
        },
        "rail": {
          "type": "string",
          "description": "Payment rail (e.g. x402, usdc-base, stripe, lightning).",
          "maxLength": 30
        }
      }
    },
    "examples": {
      "type": "array",
      "description": "1-3 representative request/response examples.",
      "minItems": 1,
      "maxItems": 3,
      "items": {
        "type": "object",
        "required": ["description", "request", "response"],
        "additionalProperties": false,
        "properties": {
          "description": { "type": "string", "maxLength": 200 },
          "request": {},
          "response": {}
        }
      }
    },
    "pact_mandate_template": {
      "type": ["string", "null"],
      "format": "uri",
      "description": "URL to a PACT mandate template that pre-fills negotiation parameters for this capability."
    },
    "mcp_tool_name": {
      "type": "string",
      "description": "Name of the MCP tool that performs this capability (Tier 2 binding).",
      "maxLength": 80
    },
    "openapi_operation_id": {
      "type": "string",
      "description": "operationId from the OpenAPI document, if this capability has a REST equivalent.",
      "maxLength": 120
    },
    "latency_p50_ms": {
      "type": "integer",
      "minimum": 0,
      "description": "Measured p50 response latency in milliseconds."
    },
    "latency_p99_ms": {
      "type": "integer",
      "minimum": 0,
      "description": "Measured p99 response latency in milliseconds."
    },
    "extensions": {
      "type": "object",
      "additionalProperties": true
    }
  },
  "additionalProperties": false
}