Gautam Sharma cb84856a16 fix(openai-agents): preserve array item schemas (#3819) ...

## Summary

Prevent the Python OpenAI Agents provider from rewriting valid JSON
Schema array item definitions.

- Stop adding `"type": "string"` when an `items` schema has no direct
`type`.
- Preserve item schemas using `anyOf`, `oneOf`, `$ref`, object
constraints, or `{}`.
  - Continue removing `examples`, `pattern`, and `default` as before.
  - Add regression coverage for each affected schema shape.

  ## Problem

The provider previously added `"type": "string"` to every array `items`
object without a direct
  type declaration.

  That changes the meaning of valid JSON Schemas. For example:

  ```json
  {
    "anyOf": [
      { "type": "object" },
      { "type": "null" }
    ]
  }

  became:

  {
    "type": "string",
    "anyOf": [
      { "type": "object" },
      { "type": "null" }
    ]
  }

Because both constraints apply, valid object and null values become
impossible. This could expose
misleading tool schemas to OpenAI Agents or cause correct tool arguments
to be rejected.

  ## Testing

  - OpenAI Agents provider tests — 6 passed
  - OpenAI Agents type-inference tests — 5 passed
  - Mypy passed
  - Ruff lint and formatting passed
  - Schema-preservation smoke test passed

Co-authored-by: GautamSharma99 <gautamsharme99067@gmail.com>
Co-authored-by: Alberto Schiabel <jkomyno@users.noreply.github.com>

2026-07-15 18:07:20 +04:00

..

test_provider.py

fix(openai-agents): preserve array item schemas (#3819)

2026-07-15 18:07:20 +04:00