path-no-duplicate-slash

Disallows // in a path template.

Attribute	Value
Category	Operations
Maturity	Gold
OpenAPI	Swagger 2.0; OpenAPI 3.0, 3.1, 3.2
Starter	Off
Lenient–Strict	Warning
Complete	Error

Intent

Duplicate separators create ambiguous URLs and can be normalized differently by clients, gateways, and servers.

Flags

Any path key containing two consecutive forward slashes anywhere in the string.

Does not flag

Paths with single separators. This rule does not check trailing slashes or path naming style.

See it fail

paths:
  /payments//items:
    get:
      responses:
        '200':
          description: OK

The diagnostic reports that /payments//items should not contain duplicate slashes.

Fix it

paths:
  /payments/items:
    get:
      responses:
        '200':
          description: OK

Configure

profiles:
  default:
    rules:
      extends: [recommended]
      override:
        path-no-duplicate-slash: error

Nearby: no-path-trailing-slash, paths-kebab-case.