ChatGPT's Codex API rejects any request that includes max_output_tokens,
returning HTTP 400 "Unsupported parameter: max_output_tokens". This caused
Deep Research to always fail during the endpoint probe when a ChatGPT
Subscription model was selected.
Remove the conditional that set payload["max_output_tokens"] in
_build_chatgpt_responses_payload(). The parameter is simply not sent.
Also update the two affected tests:
- Rename test_chatgpt_subscription_payload_uses_max_output_tokens →
test_chatgpt_subscription_payload_omits_max_output_tokens
- Rename test_chatgpt_subscription_payload_omits_empty_max_output_tokens →
test_chatgpt_subscription_payload_omits_max_output_tokens_when_zero
- Assert max_output_tokens is absent rather than present
Fixes#3650
Fixes#375
Add setup troubleshooting notes for chromadb-client conflicts, LAN/Tailscale HTTPS exposure, optional dependencies, and clean up chromadb-client in the macOS starter when present.
Sid