Amazon Control Tower API Rules

# amazon-control-tower — 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 amazonaws.com
#   - path-params-casing: camel @ 100% (n=3)
#   - operationid-casing: camel @ 100% (n=28)
#   - schema-names-casing: pascal @ 100% (n=44)
#   - schema-properties-casing: camel @ 65% (n=117)
#   - security: global (root) — NOT emitting operation-security-required
#   - error-schema-defined: Error
#   - merge: kept 27 existing, added 5 measured, upgraded 0
#   - added: servers-expected-domain, path-params-casing, schema-names-casing, schema-properties-casing, error-schema-defined
extends:
  - spectral:oas
rules:
  info-title-prefix:
    description: API title must start with "AWS Control Tower"
    severity: warn
    given: $.info.title
    then:
      function: pattern
      functionOptions:
        match: ^AWS Control Tower
  info-description-required:
    description: Info object must have a description
    severity: error
    given: $.info
    then:
      field: description
      function: truthy
  info-version-required:
    description: Info object must have a version
    severity: error
    given: $.info
    then:
      field: version
      function: truthy
  info-contact-required:
    description: Info object should have a contact
    severity: warn
    given: $.info
    then:
      field: contact
      function: truthy
  openapi-version-3x:
    description: Must use OpenAPI 3.x
    severity: error
    given: $
    then:
      field: openapi
      function: pattern
      functionOptions:
        match: ^3\.
  servers-defined:
    description: Servers array must be defined
    severity: error
    given: $
    then:
      field: servers
      function: truthy
  servers-https-only:
    description: All server URLs must use HTTPS
    severity: error
    given: $.servers[*].url
    then:
      function: pattern
      functionOptions:
        match: ^https://
  paths-post-convention:
    description: AWS Control Tower API paths use POST for all non-tag operations
    severity: info
    given: $.paths[*]~
    then:
      function: pattern
      functionOptions:
        match: ^/(create|delete|get|list|update|reset|enable|disable)-|^/tags/
  paths-kebab-case:
    description: Path segments should use kebab-case
    severity: warn
    given: $.paths[*]~
    then:
      function: pattern
      functionOptions:
        match: ^(/[a-z0-9{}-]+)+$
  operation-summary-required:
    description: All operations must have a summary
    severity: error
    given: $.paths[*][get,post,put,patch,delete]
    then:
      field: summary
      function: truthy
  operation-summary-aws-prefix:
    description: Operation summaries must start with "AWS Control Tower"
    severity: warn
    given: $.paths[*][get,post,put,patch,delete].summary
    then:
      function: pattern
      functionOptions:
        match: ^AWS Control Tower
  operation-description-required:
    description: All operations must have a description
    severity: error
    given: $.paths[*][get,post,put,patch,delete]
    then:
      field: description
      function: truthy
  operation-id-required:
    description: All operations must have an operationId
    severity: error
    given: $.paths[*][get,post,put,patch,delete]
    then:
      field: operationId
      function: truthy
  operation-id-camel-case:
    description: OperationId must use camelCase
    severity: warn
    given: $.paths[*][get,post,put,patch,delete].operationId
    then:
      function: pattern
      functionOptions:
        match: ^[a-z][a-zA-Z0-9]+$
  operation-tags-required:
    description: All operations must have tags
    severity: error
    given: $.paths[*][get,post,put,patch,delete]
    then:
      field: tags
      function: truthy
  tags-defined:
    description: Tags array should be defined globally
    severity: warn
    given: $
    then:
      field: tags
      function: truthy
  tag-description-required:
    description: Each tag must have a description
    severity: warn
    given: $.tags[*]
    then:
      field: description
      function: truthy
  request-body-json-content:
    description: POST request bodies should support application/json
    severity: warn
    given: $.paths[*].post.requestBody.content
    then:
      field: application/json
      function: truthy
  response-success-required:
    description: All operations must have at least one 2xx response
    severity: error
    given: $.paths[*][get,post,put,patch,delete].responses
    then:
      function: schema
      functionOptions:
        schema:
          anyOf:
          - required:
            - '200'
          - required:
            - '201'
          - required:
            - '204'
  response-description-required:
    description: All responses must have a description
    severity: error
    given: $.paths[*][*].responses[*]
    then:
      field: description
      function: truthy
  response-error-has-message:
    description: Error response schemas should include a message field
    severity: warn
    given: $.components.schemas.Error.properties
    then:
      field: message
      function: truthy
  schema-description-required:
    description: Top-level schemas should have a description
    severity: warn
    given: $.components.schemas[*]
    then:
      field: description
      function: truthy
  async-operation-identifier-in-response:
    description: Asynchronous operations (create, update, delete, reset, enable, disable) should return
      an operationIdentifier
    severity: info
    given: $.paths[?(@ =~ /create|update|delete|reset|enable|disable/)].post.responses.200.content.application/json.schema.properties
    then:
      field: operationIdentifier
      function: truthy
  security-schemes-defined:
    description: Security schemes must be defined
    severity: error
    given: $.components
    then:
      field: securitySchemes
      function: truthy
  no-empty-descriptions:
    description: Descriptions must not be empty strings
    severity: error
    given: $..description
    then:
      function: pattern
      functionOptions:
        match: .+
  operation-examples-encouraged:
    description: Operations should have examples in request bodies
    severity: info
    given: $.paths[*][*].requestBody.content[*]
    then:
      function: schema
      functionOptions:
        schema:
          anyOf:
          - required:
            - examples
          - required:
            - example
  arn-as-identifier-convention:
    description: Control Tower uses ARNs as resource identifiers - document them consistently
    severity: info
    given: $.paths[*][*].requestBody.content.application/json.schema.properties[?(@ =~ /Identifier|Arn/)].description
    then:
      function: truthy
  servers-expected-domain:
    description: Server URLs should be on the amazonaws.com domain.
    severity: warn
    given: $.servers[*].url
    then:
      function: pattern
      functionOptions:
        match: amazonaws\.com
  path-params-casing:
    description: Path parameters should be camelCase (the dominant convention in this API).
    severity: warn
    given: $.paths[*].parameters[?(@.in=='path')].name
    then:
      function: casing
      functionOptions:
        type: camel
  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 camelCase (the dominant convention in this API).
    severity: info
    given: $.components.schemas[*].properties
    then:
      field: '@key'
      function: casing
      functionOptions:
        type: camel
  error-schema-defined:
    description: A shared error schema (Error) should be defined for error payloads.
    severity: warn
    given: $.components.schemas
    then:
      field: Error
      function: truthy