Vehicle Databases API Rules

# vehicle-databases — 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 vehicledatabases.com
#   - path-params-casing: camel @ 80% (n=5)
#   - query-params-casing: snake @ 86% (n=7)
#   - operationid-casing: camel @ 100% (n=6)
#   - schema-names-casing: pascal @ 90% (n=10)
#   - schema-properties-casing: snake @ 61% (n=54)
#   - security: global (root) — NOT emitting operation-security-required
#   - operation-documents-404: 100% adherence
#   - merge: kept 21 existing, added 6 measured, upgraded 0
#   - added: servers-expected-domain, path-params-casing, query-params-casing, schema-names-casing, schema-properties-casing, operation-documents-404
extends:
  - spectral:oas
rules:
  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 non-empty.
    severity: warn
    given: $.info
    then:
      field: description
      function: truthy
  info-version-required:
    description: API version must be defined.
    severity: error
    given: $.info
    then:
      field: version
      function: truthy
  openapi-version-3:
    description: Must use OpenAPI 3.x.
    severity: error
    given: $
    then:
      field: openapi
      function: pattern
      functionOptions:
        match: ^3\.
  servers-defined:
    description: At least one server must be defined.
    severity: error
    given: $
    then:
      field: servers
      function: truthy
  servers-https:
    description: Server URLs must use HTTPS.
    severity: error
    given: $.servers[*].url
    then:
      function: pattern
      functionOptions:
        match: ^https://
  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: Every operation must have a summary.
    severity: error
    given: $.paths[*][get,post,put,delete,patch]
    then:
      field: summary
      function: truthy
  operation-summary-prefix:
    description: Operation summaries must start with "Vehicle Databases".
    severity: warn
    given: $.paths[*][get,post,put,delete,patch].summary
    then:
      function: pattern
      functionOptions:
        match: '^Vehicle Databases '
  operation-description-required:
    description: Every operation must have a description.
    severity: warn
    given: $.paths[*][get,post,put,delete,patch]
    then:
      field: description
      function: truthy
  operation-operationid-required:
    description: Every operation must have an operationId.
    severity: error
    given: $.paths[*][get,post,put,delete,patch]
    then:
      field: operationId
      function: truthy
  operation-operationid-camelcase:
    description: operationId must use camelCase.
    severity: warn
    given: $.paths[*][get,post,put,delete,patch].operationId
    then:
      function: pattern
      functionOptions:
        match: ^[a-z][a-zA-Z0-9]+$
  operation-tags-required:
    description: Every operation must have at least one tag.
    severity: warn
    given: $.paths[*][get,post,put,delete,patch]
    then:
      field: tags
      function: truthy
  parameter-description-required:
    description: All parameters must have a description.
    severity: warn
    given: $..parameters[*]
    then:
      field: description
      function: truthy
  response-success-required:
    description: Every operation must have a 2xx response.
    severity: error
    given: $.paths[*][get,post,put,delete,patch].responses
    then:
      function: schema
      functionOptions:
        schema:
          type: object
          anyOf:
          - required:
            - '200'
          - required:
            - '201'
  response-404-defined:
    description: Operations with path parameters should define 404 responses.
    severity: warn
    given: $.paths[*][get].responses
    then:
      function: schema
      functionOptions:
        schema:
          type: object
          required:
          - '404'
  schema-description-required:
    description: Component schemas must have descriptions.
    severity: warn
    given: $.components.schemas[*]
    then:
      field: description
      function: truthy
  security-schemes-defined:
    description: Security schemes must be defined.
    severity: error
    given: $.components
    then:
      field: securitySchemes
      function: truthy
  security-apikey-header:
    description: API key authentication should use header placement (X-API-Key).
    severity: info
    given: $.components.securitySchemes[?(@.type == 'apiKey')]
    then:
      field: in
      function: pattern
      functionOptions:
        match: ^header$
  get-no-request-body:
    description: GET operations must not have a request body.
    severity: error
    given: $.paths[*].get
    then:
      field: requestBody
      function: falsy
  no-empty-descriptions:
    description: Descriptions must not be empty.
    severity: warn
    given: $..description
    then:
      function: pattern
      functionOptions:
        match: .+
  servers-expected-domain:
    description: Server URLs should be on the vehicledatabases.com domain.
    severity: warn
    given: $.servers[*].url
    then:
      function: pattern
      functionOptions:
        match: vehicledatabases\.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
  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: $.components.schemas
    then:
      field: '@key'
      function: pattern
      functionOptions:
        match: ^[A-Z][A-Za-z0-9]*$
  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
  operation-documents-404:
    description: Operations should document a 404 response (documented on 100% of this API's operations).
    severity: warn
    given: $.paths[*][get,post,put,patch,delete].responses
    then:
      field: '404'
      function: truthy