S&P Global API Rules

# s-and-p-global — 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)
#   - query-params-casing: snake @ 50% (n=16)
#   - operationid-casing: camel @ 88% (n=8)
#   - schema-names-casing: pascal @ 100% (n=18)
#   - schema-properties-casing: snake @ 78% (n=60)
#   - operation-security-required: 7/8 ops declare per-op security
#   - pagination params observed: ['limit', 'page', 'pageSize']
#   - merge: kept 8 existing, added 6 measured, upgraded 0
#   - added: servers-https-only, query-params-casing, schema-names-casing, schema-properties-casing, security-schemes-defined, no-empty-descriptions
extends:
  - spectral:oas
rules:
  spg-summary-title-case:
    description: All operation summaries must use Title Case
    message: Operation summary '{{value}}' must use Title Case
    severity: warn
    given: $.paths[*][*].summary
    then:
      function: pattern
      functionOptions:
        match: ^[A-Z][a-zA-Z0-9]*(\s[A-Z&][a-zA-Z0-9]*)*$
  spg-tags-title-case:
    description: All tags must use Title Case
    message: Tag '{{value}}' must use Title Case
    severity: warn
    given: $.paths[*][*].tags[*]
    then:
      function: pattern
      functionOptions:
        match: ^[A-Z][a-zA-Z0-9 &]*$
  spg-bearer-auth-required:
    description: All non-auth operations must use Bearer token authentication
    message: Operations must use Bearer authentication
    severity: error
    given: $.paths[?(!@ == '/auth/api')][get,post,put,patch,delete]
    then:
      field: security
      function: truthy
  spg-operation-ids-camel-case:
    description: Operation IDs must use camelCase
    message: Operation ID '{{value}}' must use camelCase
    severity: warn
    given: $.paths[*][*].operationId
    then:
      function: pattern
      functionOptions:
        match: ^[a-z][a-zA-Z0-9]*$
  spg-date-params-format:
    description: Date parameters must use YYYY-MM-DD format
    message: Date query parameters must be formatted as YYYY-MM-DD
    severity: warn
    given: $.paths[*][*].parameters[?(@.name =~ /[Dd]ate/)]
    then:
      field: schema.format
      function: enumeration
      functionOptions:
        values:
        - date
        - date-time
  spg-pagination-params:
    description: List operations should include pageSize and page parameters
    message: Collection GET endpoints should include pageSize and page parameters
    severity: warn
    given: $.paths[*][get]
    then:
      function: schema
      functionOptions:
        schema:
          type: object
  spg-parameters-have-descriptions:
    description: All parameters must have descriptions
    message: Parameter must include a description
    severity: warn
    given: $.paths[*][*].parameters[*]
    then:
      field: description
      function: truthy
  spg-schema-names-pascal-case:
    description: Component schema names must use PascalCase
    message: Schema name must use PascalCase
    severity: warn
    given: $.components.schemas[*]~
    then:
      function: pattern
      functionOptions:
        match: ^[A-Z][a-zA-Z0-9&]*$
  servers-https-only:
    description: Server URLs must use HTTPS.
    severity: error
    given: $.servers[*].url
    then:
      function: pattern
      functionOptions:
        match: ^https://
  query-params-casing:
    description: Query parameters should be snake_case (the dominant convention in this API).
    severity: info
    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: info
    given: $.components.schemas[*].properties
    then:
      field: '@key'
      function: casing
      functionOptions:
        type: snake
  security-schemes-defined:
    description: Security schemes should be defined in components.
    severity: warn
    given: $.components
    then:
      field: securitySchemes
      function: truthy
  no-empty-descriptions:
    description: Descriptions must not be empty strings.
    severity: warn
    given: $..description
    then:
      function: truthy