features.token_budget.guidance_message must not exceed {TOKE

Error message

features.token_budget.guidance_message must not exceed {TOKEN_BUDGET_GUIDANCE_MESSAGE_MAX_BYTES} bytes

What it means

Error "features.token_budget.guidance_message must not exceed {TOKEN_BUDGET_GUIDANCE_MESSAGE_MAX_BYTES} bytes" thrown in openai/codex.

Source

Thrown at codex-rs/core/src/config/mod.rs:1159

                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)
        {
            return Err(std::io::Error::new(
                std::io::ErrorKind::InvalidInput,
                format!(
                    "features.token_budget.guidance_message must not exceed {TOKEN_BUDGET_GUIDANCE_MESSAGE_MAX_BYTES} bytes"
                ),
            ));
        }

        if self
            .auto_compact_fallback_prompt
            .as_ref()
            .is_some_and(|prompt| prompt.len() > AUTO_COMPACT_FALLBACK_PROMPT_MAX_BYTES)
        {
            return Err(std::io::Error::new(
                std::io::ErrorKind::InvalidInput,
                format!(
                    "features.token_budget.auto_compact_fallback_prompt must not exceed {AUTO_COMPACT_FALLBACK_PROMPT_MAX_BYTES} bytes"
                ),
            ));

View on GitHub (pinned to 339751715c)

Solutions

Shorten features.token_budget.guidance_message to fit under the byte cap.

When it happens

Trigger: Thrown at codex-rs/core/src/config/mod.rs:1159 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/714a5712f27ae1ee. Report an issue: GitHub.