Problem

OpenAI Agents strict schema validation rejects Paper as an Agent output type because TreeKnowledge.nodes is a dict-valued field and the generated JSON schema includes additionalProperties.

Observed error

"Strict JSON schema is enabled, but the output type is not valid..."

"additionalProperties should not be set for object types."

Environment

• Python 3.12.13
• openai-agents 0.17.5
• QuantMind commit before patch: 8e21888

Fix

Wrap the default Paper output type with AgentOutputSchema(Paper, strict_json_schema=False) when output_type is the base Paper class. Custom output types continue to pass through unchanged.

Validation

• paper_flow runs successfully on RawText input (downstream wrapper smoke on OpenAI Agents 0.17.5)
• Downstream wrapper validates emitted output through a vendor schema and adapter mapping
• Existing validation/tests:
  • bash scripts/verify.sh: ruff format, ruff check, basedpyright, lint-imports — PASS
  • pytest --cov: 232 passed, 1 failed (test_local_file_branch — Windows /tmp vs \tmp path assertion; unrelated to this patch)
  • Coverage 89.49% (75% floor met)