Akri API Rules

rules:
  # INFO / METADATA
  info-title-required:
    description: Info title must be defined
    severity: error
    given: "$.info"
    then:
      field: title
      function: truthy

  info-description-required:
    description: Info description must be defined and non-empty
    severity: warn
    given: "$.info"
    then:
      field: description
      function: truthy

  info-version-required:
    description: Info version must be defined
    severity: error
    given: "$.info"
    then:
      field: version
      function: truthy

  info-contact-required:
    description: Info should include contact information
    severity: warn
    given: "$.info"
    then:
      field: contact
      function: truthy

  info-license-required:
    description: Info should include license information (Apache 2.0 for CNCF projects)
    severity: warn
    given: "$.info"
    then:
      field: license
      function: truthy

  # OPENAPI VERSION
  openapi-version-3:
    description: Must use OpenAPI 3.0.x
    severity: error
    given: "$"
    then:
      field: openapi
      function: pattern
      functionOptions:
        match: "^3\\.0\\."

  # SERVERS
  servers-required:
    description: Servers must be defined
    severity: error
    given: "$"
    then:
      field: servers
      function: truthy

  servers-https-required:
    description: Server URLs should use HTTPS (or localhost for metrics)
    severity: warn
    given: "$.servers[*]"
    then:
      field: url
      function: pattern
      functionOptions:
        match: "^(https://|http://localhost)"

  # PATHS — NAMING CONVENTIONS
  paths-kebab-case:
    description: Path segments should use kebab-case
    severity: warn
    given: "$.paths[*]~"
    then:
      function: pattern
      functionOptions:
        match: "^(/[a-z0-9-{}]+)+$"

  paths-no-trailing-slash:
    description: Paths must not have a trailing slash
    severity: error
    given: "$.paths[*]~"
    then:
      function: pattern
      functionOptions:
        notMatch: "/$"

  # OPERATIONS
  operation-summary-required:
    description: Operations must have a summary
    severity: error
    given: "$.paths[*][get,post,put,patch,delete,head,options]"
    then:
      field: summary
      function: truthy

  operation-description-required:
    description: Operations should have a description
    severity: warn
    given: "$.paths[*][get,post,put,patch,delete,head,options]"
    then:
      field: description
      function: truthy

  operation-operationid-required:
    description: Operations must have an operationId
    severity: error
    given: "$.paths[*][get,post,put,patch,delete,head,options]"
    then:
      field: operationId
      function: truthy

  operation-operationid-camel-case:
    description: OperationId should use camelCase
    severity: warn
    given: "$.paths[*][get,post,put,patch,delete,head,options].operationId"
    then:
      function: pattern
      functionOptions:
        match: "^[a-z][a-zA-Z0-9]+$"

  operation-tags-required:
    description: Operations must have at least one tag
    severity: error
    given: "$.paths[*][get,post,put,patch,delete,head,options]"
    then:
      field: tags
      function: truthy

  operation-summary-akri-prefix:
    description: Operation summaries should start with 'Akri'
    severity: warn
    given: "$.paths[*][get,post,put,patch,delete,head,options].summary"
    then:
      function: pattern
      functionOptions:
        match: "^Akri "

  # TAGS
  tags-defined:
    description: Tags should be defined at the global level
    severity: warn
    given: "$"
    then:
      field: tags
      function: truthy

  tags-description-required:
    description: Global tags should have descriptions
    severity: warn
    given: "$.tags[*]"
    then:
      field: description
      function: truthy

  # PARAMETERS
  parameter-description-required:
    description: Parameters must have a description
    severity: error
    given: "$.paths[*][*].parameters[*]"
    then:
      field: description
      function: truthy

  # RESPONSES
  response-success-required:
    description: Operations must have at least one 2xx response
    severity: error
    given: "$.paths[*][get,post,put,patch,delete]"
    then:
      field: responses
      function: schema
      functionOptions:
        schema:
          type: object
          patternProperties:
            "^2[0-9]{2}$": {}
          minProperties: 1

  response-description-required:
    description: All responses must have a description
    severity: error
    given: "$.paths[*][*].responses[*]"
    then:
      field: description
      function: truthy

  # SCHEMAS
  schema-description-required:
    description: Top-level schemas should have descriptions
    severity: warn
    given: "$.components.schemas[*]"
    then:
      field: description
      function: truthy

  schema-type-required:
    description: Schemas should define a type
    severity: warn
    given: "$.components.schemas[*]"
    then:
      field: type
      function: truthy

  # GENERAL QUALITY
  no-empty-descriptions:
    description: Descriptions must not be empty strings
    severity: error
    given: "$..description"
    then:
      function: pattern
      functionOptions:
        match: ".+"

  examples-encouraged:
    description: Schema properties should have examples
    severity: info
    given: "$.components.schemas[*].properties[*]"
    then:
      field: example
      function: truthy