features.token_budget.reminder_message_template must not be

Error message

features.token_budget.reminder_message_template must not be empty

What it means

Error "features.token_budget.reminder_message_template must not be empty" thrown in openai/codex.

Source

Thrown at codex-rs/core/src/config/mod.rs:1140

    pub guidance_message: Option<String>,
    pub auto_compact_fallback_prompt: Option<String>,
    pub auto_compact_fallback_buffer_tokens: Option<i64>,
}

impl TokenBudgetConfig {
    pub(crate) fn validate(&self) -> std::io::Result<()> {
        if self
            .reminder_threshold_tokens
            .is_some_and(|tokens| tokens <= 0)
        {
            return Err(std::io::Error::new(
                std::io::ErrorKind::InvalidInput,
                "features.token_budget.reminder_threshold_tokens must be positive",
            ));
        }

        if self.reminder_message_template.trim().is_empty() {
            return Err(std::io::Error::new(
                std::io::ErrorKind::InvalidInput,
                "features.token_budget.reminder_message_template must not be empty",
            ));
        }
        if self.reminder_message_template.len() > TOKEN_BUDGET_REMINDER_MESSAGE_TEMPLATE_MAX_BYTES {
            return Err(std::io::Error::new(
                std::io::ErrorKind::InvalidInput,
                format!(
                    "features.token_budget.reminder_message_template must not exceed {TOKEN_BUDGET_REMINDER_MESSAGE_TEMPLATE_MAX_BYTES} bytes"
                ),
            ));
        }

        if self
            .guidance_message
            .as_ref()
            .is_some_and(|message| message.len() > TOKEN_BUDGET_GUIDANCE_MESSAGE_MAX_BYTES)
        {

View on GitHub (pinned to 339751715c)

Solutions

Provide a non-empty features.token_budget.reminder_message_template.

When it happens

Trigger: Thrown at codex-rs/core/src/config/mod.rs:1140 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/6455f0f01625b693. Report an issue: GitHub.