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empty-object

Category: Semantic — schema semantics trigger this rule

Error Codes​

ProfileCode
openai.so.2026-04-30OAI-S-empty-object
anthropic.so.2026-04-30ANT-S-empty-object

Description​

Object schema with additionalProperties: false but no properties

Rationale​

Some providers may reject or misbehave when a schema permits no properties while also forbidding all extras via additionalProperties: false. This pattern is semantically valid but rarely intentional.

Bad Example​

{
  "type": "object",
  "additionalProperties": false,
  "properties": {}
}

Good Example​

{
  "type": "object",
  "additionalProperties": false,
  "properties": {
    "name": { "type": "string" }
  }
}