Hmbown/CodeWhale · error

Failed to update setting: invalid cost currency

Error message

Failed to update setting: invalid cost currency '{value}'. Expected: usd, cny, rmb, yuan.

What it means

Settings::set resolves the `cost_currency`/`currency` value through crate::pricing::CostCurrency::from_setting. When that returns None the setter bails. The canonical storage values are "usd" and "cny"; the error additionally advertises rmb and yuan as accepted spellings of CNY.

Solutions

1. Use usd, cny, rmb, or yuan.
2. If you need another currency, it is not implemented — file/inspect a feature request in the pricing module.
3. Verify the exact string in CostCurrency::from_setting in crates/tui/src/pricing.rs.

Example fix

// before
settings.set("cost_currency", "eur")?;
// after
settings.set("cost_currency", "usd")?;

fn valid_currency(v: &str) -> bool {
    matches!(v.trim().to_ascii_lowercase().as_str(), "usd" | "cny" | "rmb" | "yuan")
}

match settings.set("cost_currency", value) {
    Err(e) if e.to_string().contains("invalid cost currency") => eprintln!("only USD and CNY are supported"),
    r => r?,
}

When it happens

Trigger: Settings::set("cost_currency", v) where from_setting(v) returns None — e.g. `currency EUR`, `currency dollars`, or a trailing-space/emoji variant the parser does not strip.

Common situations: Users wanting costs displayed in a currency that is not supported (only USD and CNY exist), or typing informal currency names (bucks, ¥).

Understand the failure class

Background: "Invalid value" and "allowed values are" config errors: what your library rejected and how to fix it — this error's family across 41 libraries.

Related errors

• A pinned task provider requires an explicit model
• Failed to update setting: invalid mode
• Failed to update setting: invalid ocean treatment
• Failed to update setting: invalid permission posture
• Failed to update setting: invalid status indicator

AI-assisted analysis of Hmbown/CodeWhale@73e0f67d83 (2026-09-22). Data as JSON: /api/errors/cc1bc93b03ebb3ed. Report an issue: GitHub.

Appendix: source

Thrown at crates/tui/src/settings.rs:1719

                    "plan" => "plan".to_string(),
                    "operate" | "operation" | "ops" => "operate".to_string(),
                    _ => anyhow::bail!(
                        "Failed to update setting: invalid mode '{value}'. Expected: act (agent), plan, or operate."
                    ),
                };
            }
            "context_panel" | "context" | "session_panel" => {
                self.context_panel = parse_bool(value)?;
            }
            "sessions_rail" | "sessions_panel" | "session_rail" => {
                self.sessions_rail = parse_bool(value)?;
            }
            "session_auto_resume" | "auto_resume" => {
                self.session_auto_resume = parse_bool(value)?;
            }
            "cost_currency" | "currency" => {
                let Some(currency) = crate::pricing::CostCurrency::from_setting(value) else {
                    anyhow::bail!(
                        "Failed to update setting: invalid cost currency '{value}'. Expected: usd, cny, rmb, yuan."
                    );
                };
                self.cost_currency = match currency {
                    crate::pricing::CostCurrency::Usd => "usd",
                    crate::pricing::CostCurrency::Cny => "cny",
                }
                .to_string();
            }
            "max_history" | "history" => {
                let max: usize = value.parse().map_err(|_| {
                    anyhow::anyhow!(
                        "Failed to update setting: invalid max history '{value}'. Expected a positive number."
                    )
                })?;
                self.max_input_history = max;
            }
            "default_model" | "model" => {

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