NousResearch/hermes-agent · error · ValueError

Codex Responses input[{idx}] message content[{part_idx}] has

Error message

Codex Responses input[{idx}] message content[{part_idx}] has unsupported type {part_type!r}.

What it means

Error "Codex Responses input[{idx}] message content[{part_idx}] has unsupported type {part_type!r}." thrown in NousResearch/hermes-agent.

Source

Thrown at agent/codex_responses_adapter.py:862

                )
            continue

        if item_type == "message":
            role = item.get("role")
            if role != "assistant":
                raise ValueError(f"Codex Responses input[{idx}] message items must have role='assistant'.")
            content = item.get("content")
            if not isinstance(content, list):
                raise ValueError(f"Codex Responses input[{idx}] message item must have content list.")
            normalized_content = []
            for part_idx, part in enumerate(content):
                if not isinstance(part, dict):
                    raise ValueError(
                        f"Codex Responses input[{idx}] message content[{part_idx}] must be an object."
                    )
                part_type = part.get("type")
                if part_type not in {"output_text", "text"}:
                    raise ValueError(
                        f"Codex Responses input[{idx}] message content[{part_idx}] has unsupported type {part_type!r}."
                    )
                text = part.get("text", "")
                if text is None:
                    text = ""
                if not isinstance(text, str):
                    text = str(text)
                normalized_content.append({"type": "output_text", "text": sanitize_text(text)})
            if not normalized_content:
                raise ValueError(f"Codex Responses input[{idx}] message item must contain at least one text part.")
            normalized_item: Dict[str, Any] = {
                "type": "message",
                "role": "assistant",
                "status": _normalize_responses_message_status(item.get("status")),
                "content": normalized_content,
            }
            item_id = item.get("id")
            if (

View on GitHub (pinned to c896c09c42)

Solutions

1. Map the unsupported content part type to a supported Responses type (text/output_text).
2. Drop or convert content parts the Responses API cannot represent.

When it happens

Trigger: Thrown at agent/codex_responses_adapter.py:862 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of NousResearch/hermes-agent@c896c09c42 (2026-08-14). Data as JSON: /api/errors/533c02e88b308ef5. Report an issue: GitHub.