EmailRep API Rules

# emailrep — 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 emailrep.io
#   - schema-names-casing: pascal @ 100% (n=5)
#   - schema-properties-casing: snake @ 100% (n=38)
#   - security: global (root) — NOT emitting operation-security-required
#   - error-schema-defined: Error
#   - merge: kept 43 existing, added 4 measured, upgraded 0
#   - added: servers-expected-domain, schema-names-casing, schema-properties-casing, error-schema-defined
extends:
  - spectral:oas
rules:
  info-title-prefix:
    description: The info.title must start with "EmailRep".
    given: $.info.title
    severity: error
    then:
      function: pattern
      functionOptions:
        match: ^EmailRep( .*)?$
  info-description-required:
    description: The info.description is required and must be at least 80 characters.
    given: $.info
    severity: error
    then:
    - field: description
      function: truthy
    - field: description
      function: length
      functionOptions:
        min: 80
  info-version-required:
    description: The info.version is required.
    given: $.info
    severity: error
    then:
      field: version
      function: truthy
  info-contact-required:
    description: The info.contact block must be present with url or email.
    given: $.info
    severity: warn
    then:
      field: contact
      function: truthy
  info-license-required:
    description: The info.license block must be present.
    given: $.info
    severity: warn
    then:
      field: license
      function: truthy
  openapi-version-3:
    description: OpenAPI version must be 3.0.x or higher.
    given: $.openapi
    severity: error
    then:
      function: pattern
      functionOptions:
        match: ^3\.
  servers-defined:
    description: At least one server URL must be defined.
    given: $.servers
    severity: error
    then:
      function: truthy
  servers-https-only:
    description: Server URLs must use HTTPS.
    given: $.servers[*].url
    severity: error
    then:
      function: pattern
      functionOptions:
        match: ^https://
  servers-emailrep-host:
    description: EmailRep API server host must be https://emailrep.io.
    given: $.servers[*].url
    severity: warn
    then:
      function: pattern
      functionOptions:
        match: ^https://emailrep\.io
  paths-kebab-case:
    description: Path segments must be lowercase kebab-case or path templates.
    given: $.paths[*]~
    severity: warn
    then:
      function: pattern
      functionOptions:
        match: ^/([a-z0-9-]+|\{[a-zA-Z_]+\})(/([a-z0-9-]+|\{[a-zA-Z_]+\}))*$
  paths-no-trailing-slash:
    description: Paths must not end with a trailing slash.
    given: $.paths[*]~
    severity: error
    then:
      function: pattern
      functionOptions:
        notMatch: .+/$
  paths-no-query-string:
    description: Paths must not include query strings — declare parameters instead.
    given: $.paths[*]~
    severity: error
    then:
      function: pattern
      functionOptions:
        notMatch: \?
  operation-summary-required:
    description: Every operation must have a summary.
    given: $.paths[*][get,post,put,patch,delete]
    severity: error
    then:
      field: summary
      function: truthy
  operation-summary-prefix:
    description: Operation summaries must start with "EmailRep".
    given: $.paths[*][get,post,put,patch,delete].summary
    severity: warn
    then:
      function: pattern
      functionOptions:
        match: '^EmailRep '
  operation-description-required:
    description: Every operation must have a description of at least 30 characters.
    given: $.paths[*][get,post,put,patch,delete]
    severity: warn
    then:
    - field: description
      function: truthy
    - field: description
      function: length
      functionOptions:
        min: 30
  operation-operationid-required:
    description: Every operation must have an operationId.
    given: $.paths[*][get,post,put,patch,delete]
    severity: error
    then:
      field: operationId
      function: truthy
  operation-operationid-camel-case:
    description: operationId must be camelCase starting with a lowercase verb.
    given: $.paths[*][get,post,put,patch,delete].operationId
    severity: warn
    then:
      function: pattern
      functionOptions:
        match: ^[a-z][a-zA-Z0-9]+$
  operation-tags-required:
    description: Every operation must declare at least one tag.
    given: $.paths[*][get,post,put,patch,delete]
    severity: warn
    then:
      field: tags
      function: truthy
  operation-microcks-extension:
    description: Operations should include an x-microcks-operation extension for mock-server compatibility.
    given: $.paths[*][get,post,put,patch,delete]
    severity: info
    then:
      field: x-microcks-operation
      function: truthy
  tags-global-defined:
    description: A global tags array must be defined.
    given: $.tags
    severity: warn
    then:
      function: truthy
  tag-description-required:
    description: Each tag must have a description.
    given: $.tags[*]
    severity: warn
    then:
      field: description
      function: truthy
  tag-title-case:
    description: Tag names must be Title Case (e.g., "Reputation", "Reports").
    given: $.tags[*].name
    severity: warn
    then:
      function: pattern
      functionOptions:
        match: ^[A-Z][a-zA-Z]*( [A-Z][a-zA-Z]*)*$
  parameter-description-required:
    description: Every parameter must have a description.
    given: $.paths[*][*].parameters[*]
    severity: warn
    then:
      field: description
      function: truthy
  parameter-snake-case:
    description: Parameter names must use snake_case or be email path tokens.
    given: $.paths[*][*].parameters[*].name
    severity: info
    then:
      function: pattern
      functionOptions:
        match: ^[a-z][a-z0-9_]*$
  parameter-no-apikey-in-query:
    description: API keys must be passed in the `Key` header, not in query parameters.
    given: $.paths[*][*].parameters[?(@.in=="query")].name
    severity: error
    then:
      function: pattern
      functionOptions:
        notMatch: (?i)(api_?key|apikey|key|token)
  request-body-json-only:
    description: Request bodies must be application/json.
    given: $.paths[*][post,put,patch].requestBody.content
    severity: error
    then:
      field: application/json
      function: truthy
  request-body-description:
    description: Request bodies should have a description.
    given: $.paths[*][post,put,patch].requestBody
    severity: warn
    then:
      field: description
      function: truthy
  response-success-required:
    description: Every operation must define a 2xx success response.
    given: $.paths[*][get,post,put,patch,delete].responses
    severity: error
    then:
      field: '200'
      function: truthy
  response-error-401-required:
    description: Operations should document a 401 Unauthorized response.
    given: $.paths[*][get,post,put,patch,delete].responses
    severity: warn
    then:
      field: '401'
      function: truthy
  response-error-429-required:
    description: Operations should document a 429 rate-limit response (EmailRep enforces quotas).
    given: $.paths[*][get,post,put,patch,delete].responses
    severity: warn
    then:
      field: '429'
      function: truthy
  response-description-required:
    description: Every response must have a description.
    given: $.paths[*][*].responses[*]
    severity: error
    then:
      field: description
      function: truthy
  response-json-content:
    description: 2xx responses must declare application/json content.
    given: $.paths[*][*].responses.200.content
    severity: error
    then:
      field: application/json
      function: truthy
  schema-property-snake-case:
    description: JSON schema property names must use snake_case.
    given: $.components.schemas[*].properties[*]~
    severity: warn
    then:
      function: pattern
      functionOptions:
        match: ^[a-z][a-z0-9_]*$
  schema-description-required:
    description: Top-level schemas should have a description.
    given: $.components.schemas[*]
    severity: warn
    then:
      field: description
      function: truthy
  schema-property-type-required:
    description: Each property must declare a type (or be a $ref).
    given: $.components.schemas[*].properties[*]
    severity: warn
    then:
      function: schema
      functionOptions:
        schema:
          anyOf:
          - required:
            - type
          - required:
            - $ref
  security-global-defined:
    description: A global security array must be defined.
    given: $
    severity: warn
    then:
      field: security
      function: truthy
  security-scheme-defined:
    description: At least one securityScheme must be defined.
    given: $.components.securitySchemes
    severity: error
    then:
      function: truthy
  security-apikey-key-header:
    description: EmailRep authentication uses the `Key` header (not Authorization, not X-API-Key).
    given: $.components.securitySchemes[?(@.type=="apiKey")]
    severity: warn
    then:
      field: name
      function: pattern
      functionOptions:
        match: ^Key$
  get-no-request-body:
    description: GET operations must not declare a request body.
    given: $.paths[*].get.requestBody
    severity: error
    then:
      function: falsy
  delete-no-request-body:
    description: DELETE operations should not declare a request body.
    given: $.paths[*].delete.requestBody
    severity: warn
    then:
      function: falsy
  post-has-request-body:
    description: POST operations should declare a request body.
    given: $.paths[*].post
    severity: warn
    then:
      field: requestBody
      function: truthy
  no-empty-descriptions:
    description: Descriptions must not be empty strings.
    given: $..description
    severity: warn
    then:
      function: truthy
  examples-encouraged:
    description: Schema properties and operations should include examples where possible.
    given: $.components.schemas[*].properties[*]
    severity: info
    then:
      field: example
      function: truthy
  servers-expected-domain:
    description: Server URLs should be on the emailrep.io domain.
    severity: warn
    given: $.servers[*].url
    then:
      function: pattern
      functionOptions:
        match: emailrep\.io
  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 (Error) should be defined for error payloads.
    severity: warn
    given: $.components.schemas
    then:
      field: Error
      function: truthy