extends: spectral:oas
rules:
  buildpacks-info-license-required:
    description: Info object must declare a license (CNB ships Apache-2.0).
    severity: error
    given: "$.info"
    then:
      field: license
      function: truthy

  buildpacks-info-contact-required:
    description: Info object must declare contact details pointing to buildpacks.io.
    severity: warn
    given: "$.info"
    then:
      field: contact
      function: truthy

  buildpacks-operation-summary-title-case:
    description: Operation summaries must use Title Case.
    severity: warn
    given: "$.paths[*][*].summary"
    then:
      function: pattern
      functionOptions:
        match: "^([A-Z][a-z0-9]*(\\s[A-Z][a-z0-9]*)*)"

  buildpacks-operation-id-camel-case:
    description: operationId must be camelCase.
    severity: warn
    given: "$.paths[*][*].operationId"
    then:
      function: pattern
      functionOptions:
        match: "^[a-z][a-zA-Z0-9]*$"

  buildpacks-operation-tags-required:
    description: Every operation must declare at least one tag.
    severity: error
    given: "$.paths[*][*]"
    then:
      field: tags
      function: truthy

  buildpacks-operation-description-required:
    description: Every operation must include a description.
    severity: warn
    given: "$.paths[*][*]"
    then:
      field: description
      function: truthy

  buildpacks-version-string-required:
    description: API version must be a non-empty string (semver or date-tagged).
    severity: error
    given: "$.info.version"
    then:
      function: truthy

  buildpacks-namespace-path-param:
    description: Buildpack paths should include a {namespace} path parameter.
    severity: info
    given: "$.paths"
    then:
      function: pattern
      functionOptions:
        match: "/buildpacks/\\{namespace\\}/\\{name\\}"