Cataas API Rules

# cataas — Spectral ruleset (strengthened)
# Plain Spectral. Existing hand-authored rules preserved; measured rules added
# from this provider's own OpenAPI conventions by strengthen_ruleset.py,
# then self-validated against the spec.
#
# Provenance:
#   - servers-https-only: 100% of servers already https (error)
#   - servers-expected-domain: 1/1 servers on cataas.com
#   - path-params-casing: snake @ 100% (n=10)
#   - query-params-casing: snake @ 83% (n=52)
#   - operationid-casing: camel @ 100% (n=15)
#   - schema-names-casing: pascal @ 100% (n=5)
#   - schema-properties-casing: snake @ 93% (n=14)
#   - security: neither global nor consistently per-op — schemes-defined only
#   - error-schema-defined: ErrorResponse
#   - pagination params observed: ['limit']
#   - merge: kept 33 existing, added 7 measured, upgraded 0
#   - added: servers-expected-domain, path-params-casing, query-params-casing, schema-names-casing, schema-properties-casing, error-schema-defined, no-empty-descriptions
extends:
  - spectral:oas
rules:
  info-title-cataas-prefix:
    description: Info title must include the Cataas brand.
    severity: warn
    given: $.info.title
    then:
      function: pattern
      functionOptions:
        match: .*[Cc]ataas.*
  info-description-required:
    description: Info description is required and must be substantive.
    severity: warn
    given: $.info
    then:
      field: description
      function: truthy
  info-contact-defined:
    description: Info contact block should be defined.
    severity: info
    given: $.info
    then:
      field: contact
      function: truthy
  info-license-defined:
    description: Info license block should be defined.
    severity: info
    given: $.info
    then:
      field: license
      function: truthy
  openapi-version-3:
    description: OpenAPI version must be 3.x.
    severity: error
    given: $.openapi
    then:
      function: pattern
      functionOptions:
        match: ^3\.
  servers-https-required:
    description: Server URLs must use HTTPS.
    severity: error
    given: $.servers[*].url
    then:
      function: pattern
      functionOptions:
        match: ^https://
  servers-description-required:
    description: Each server should have a description.
    severity: warn
    given: $.servers[*]
    then:
      field: description
      function: truthy
  paths-kebab-case:
    description: Path segments must use lowercase kebab-case (excluding {placeholders}).
    severity: warn
    given: $.paths.*~
    then:
      function: pattern
      functionOptions:
        match: ^(/([a-z0-9]+(-[a-z0-9]+)*|\{[a-zA-Z]+\}))+$
  paths-no-trailing-slash:
    description: Paths must not end with a trailing slash.
    severity: error
    given: $.paths.*~
    then:
      function: pattern
      functionOptions:
        notMatch: /$
  paths-no-query-string:
    description: Paths must not contain query strings.
    severity: error
    given: $.paths.*~
    then:
      function: pattern
      functionOptions:
        notMatch: \?
  operation-operationid-required:
    description: Every operation must have an operationId.
    severity: error
    given: $.paths.*.*
    then:
      field: operationId
      function: truthy
  operation-operationid-camel-case:
    description: operationId must be lowerCamelCase.
    severity: warn
    given: $.paths.*.*.operationId
    then:
      function: pattern
      functionOptions:
        match: ^[a-z][a-zA-Z0-9]*$
  operation-operationid-verb-prefix:
    description: operationId should begin with a recognised verb (get/list/create/update/delete/upload/admin).
    severity: warn
    given: $.paths.*.*.operationId
    then:
      function: pattern
      functionOptions:
        match: ^(get|list|create|update|patch|delete|upload|admin)
  operation-summary-required:
    description: Every operation must have a summary.
    severity: error
    given: $.paths.*.*
    then:
      field: summary
      function: truthy
  operation-summary-cataas-prefix:
    description: Operation summaries should begin with 'CATAAS'.
    severity: warn
    given: $.paths.*.*.summary
    then:
      function: pattern
      functionOptions:
        match: '^CATAAS '
  operation-description-required:
    description: Every operation must have a description.
    severity: warn
    given: $.paths.*.*
    then:
      field: description
      function: truthy
  operation-tags-required:
    description: Every operation must have at least one tag.
    severity: warn
    given: $.paths.*.*
    then:
      field: tags
      function: truthy
  tag-global-list-defined:
    description: Global tags array must be defined.
    severity: warn
    given: $
    then:
      field: tags
      function: truthy
  tag-description-required:
    description: Each global tag must have a description.
    severity: warn
    given: $.tags[*]
    then:
      field: description
      function: truthy
  tag-title-case:
    description: Tag names must be Title Case (no hyphens, no underscores).
    severity: warn
    given: $.tags[*].name
    then:
      function: pattern
      functionOptions:
        match: ^[A-Z][A-Za-z0-9]*( [A-Z][A-Za-z0-9]*)*$
  parameter-description-required:
    description: Every parameter must have a description.
    severity: warn
    given: $.paths.*.*.parameters[*]
    then:
      field: description
      function: truthy
  parameter-schema-required:
    description: Every parameter must define a schema.
    severity: error
    given: $.paths.*.*.parameters[*]
    then:
      field: schema
      function: truthy
  request-body-content-required:
    description: Request bodies must declare content.
    severity: error
    given: $.paths.*.*.requestBody
    then:
      field: content
      function: truthy
  response-success-required:
    description: Every operation must define at least one 2xx response.
    severity: error
    given: $.paths.*.*.responses
    then:
      function: schema
      functionOptions:
        schema:
          type: object
          patternProperties:
            ^(2[0-9][0-9]|204)$:
              type: object
          additionalProperties: true
  response-description-required:
    description: Every response must have a description.
    severity: error
    given: $.paths.*.*.responses.*
    then:
      field: description
      function: truthy
  schema-property-snake-case:
    description: Schema property names should be snake_case (with allowance for camelCase font* overlay
      params).
    severity: info
    given: $.components.schemas.*.properties.*~
    then:
      function: pattern
      functionOptions:
        match: ^(_?[a-z][a-z0-9_]*|font[A-Z][a-zA-Z]+)$
  schema-type-required:
    description: Schema property must declare a type (or $ref / oneOf / anyOf / allOf).
    severity: warn
    given: $.components.schemas.*.properties.*
    then:
      function: schema
      functionOptions:
        schema:
          oneOf:
          - required:
            - type
          - required:
            - $ref
          - required:
            - oneOf
          - required:
            - anyOf
          - required:
            - allOf
  security-schemes-defined:
    description: Security schemes must be defined under components.
    severity: warn
    given: $.components
    then:
      field: securitySchemes
      function: truthy
  security-admin-bearer:
    description: Admin operations should require bearer auth.
    severity: warn
    given: $.paths[?(@property.match(/^\/admin\//))].*
    then:
      field: security
      function: truthy
  http-get-no-request-body:
    description: GET operations must not define a request body.
    severity: error
    given: $.paths.*.get
    then:
      field: requestBody
      function: falsy
  http-delete-no-request-body:
    description: DELETE operations must not define a request body.
    severity: error
    given: $.paths.*.delete
    then:
      field: requestBody
      function: falsy
  http-post-has-request-body:
    description: POST operations should define a request body.
    severity: warn
    given: $.paths.*.post
    then:
      field: requestBody
      function: truthy
  microcks-extension-encouraged:
    description: Operations should define x-microcks-operation for mock compatibility.
    severity: info
    given: $.paths.*.*
    then:
      field: x-microcks-operation
      function: truthy
  servers-expected-domain:
    description: Server URLs should be on the cataas.com domain.
    severity: warn
    given: $.servers[*].url
    then:
      function: pattern
      functionOptions:
        match: cataas\.com
  path-params-casing:
    description: Path parameters should be snake_case (the dominant convention in this API).
    severity: warn
    given: $.paths[*].parameters[?(@.in=='path')].name
    then:
      function: casing
      functionOptions:
        type: snake
  query-params-casing:
    description: Query parameters should be snake_case (the dominant convention in this API).
    severity: warn
    given: $.paths[*][get,post,put,patch,delete].parameters[?(@.in=='query')]
    then:
      field: name
      function: casing
      functionOptions:
        type: snake
  schema-names-casing:
    description: Component schema names should be PascalCase (the dominant convention in this API).
    severity: warn
    given: $.components.schemas
    then:
      field: '@key'
      function: casing
      functionOptions:
        type: pascal
  schema-properties-casing:
    description: Schema properties should be snake_case (the dominant convention in this API).
    severity: warn
    given: $.components.schemas[*].properties
    then:
      field: '@key'
      function: casing
      functionOptions:
        type: snake
  error-schema-defined:
    description: A shared error schema (ErrorResponse) should be defined for error payloads.
    severity: warn
    given: $.components.schemas
    then:
      field: ErrorResponse
      function: truthy
  no-empty-descriptions:
    description: Descriptions must not be empty strings.
    severity: warn
    given: $..description
    then:
      function: truthy