openai/codex · error · anyhow::Error

model item in payload {} did not contain a string type

Error message

model item in payload {} did not contain a string type

What it means

Error "model item in payload {} did not contain a string type" thrown in openai/codex.

Source

Thrown at codex-rs/rollout-trace/src/reducer/conversation/normalize.rs:68

    Ok(normalized_items)
}

pub(super) fn token_usage_from_value(value: &Value) -> Option<TokenUsage> {
    Some(TokenUsage {
        input_tokens: u64_field(value, "input_tokens")?,
        cached_input_tokens: u64_field(value, "cached_input_tokens")?,
        cache_write_input_tokens: u64_field(value, "cache_write_input_tokens").unwrap_or(0),
        output_tokens: u64_field(value, "output_tokens")?,
        reasoning_output_tokens: u64_field(value, "reasoning_output_tokens")?,
    })
}

fn normalize_model_item(
    item: &Value,
    raw_payload: &RawPayloadRef,
) -> Result<NormalizedConversationItem> {
    let Some(item_type) = item.get("type").and_then(Value::as_str) else {
        bail!(
            "model item in payload {} did not contain a string type",
            raw_payload.raw_payload_id
        );
    };
    match item_type {
        "message" => normalize_message_item(item, raw_payload),
        "agent_message" => normalize_agent_message_item(item, raw_payload),
        "reasoning" => normalize_reasoning_item(item, raw_payload),
        "function_call" => Ok(NormalizedConversationItem {
            role: ConversationRole::Assistant,
            channel: Some(ConversationChannel::Commentary),
            kind: ConversationItemKind::FunctionCall,
            agent_message: None,
            body: raw_text_or_json_body(item.get("arguments"), raw_payload),
            call_id: item
                .get("call_id")
                .and_then(Value::as_str)
                .map(ToString::to_string),

View on GitHub (pinned to 339751715c)

When it happens

Trigger: Thrown at codex-rs/rollout-trace/src/reducer/conversation/normalize.rs:68 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of openai/codex@339751715c (2026-08-25). Data as JSON: /api/errors/3bc8be3c50543e15. Report an issue: GitHub.