nikivdev/code · error

Suggested command is empty.

Error message

Suggested command is empty.

What it means

Thrown by execute_suggested_command in ask.rs when the AI-suggested command string, after splitting on whitespace, produces no tokens — meaning the suggestion was empty or whitespace-only. This is a defensive check before attempting to dispatch the command.

Source

Thrown at src/ask.rs:251

        "Run this command now?".to_string(),
        command.trim().to_string(),
    ];
    if !confirm_with_tui("Ask", &lines, "Run suggested command? [Y/n]: ")? {
        return Ok(());
    }

    execute_suggested_command(command)
}

fn execute_suggested_command(command: &str) -> Result<()> {
    let tokens = shell_words::split(command).unwrap_or_else(|_| {
        command
            .split_whitespace()
            .map(|part| part.to_string())
            .collect()
    });
    if tokens.is_empty() {
        bail!("Suggested command is empty.");
    }

    let args = match tokens.first().map(|token| token.as_str()) {
        Some("f") | Some("flow") => tokens[1..].to_vec(),
        _ => tokens,
    };
    if args.is_empty() {
        bail!("Suggested command is incomplete.");
    }

    let exe = std::env::current_exe()?;
    let status = Command::new(&exe)
        .args(&args)
        .stdin(Stdio::inherit())
        .stdout(Stdio::inherit())
        .stderr(Stdio::inherit())
        .status()
        .with_context(|| format!("failed to execute suggested command via {}", exe.display()))?;

View on GitHub (pinned to a747e741ae)

Solutions

1. Verify the AI response actually contains a non-empty command before offering execution
2. Regenerate or re-prompt if the suggestion came back empty
3. Handle the empty case upstream (skip execute_suggested_command) instead of passing blank strings

Example fix

// before
execute_suggested_command(&suggestion.command)?;
// after
if !suggestion.command.trim().is_empty() {
    execute_suggested_command(&suggestion.command)?;
}

fn suggestion_usable(cmd: &str) -> bool {
    !cmd.split_whitespace().next().unwrap_or("").is_empty()
}
if !suggestion_usable(&suggestion.command) {
    eprintln!("skipping empty AI suggestion");
    return Ok(());
}

match execute_suggested_command(&cmd) {
    Err(e) if e.to_string().contains("Suggested command is empty") => {
        eprintln!("AI returned no command; re-prompt or skip.");
        Ok(())
    }
    other => other,
}

When it happens

Trigger: maybe_offer_execute passes an AI suggestion to execute_suggested_command where command is "" or " ", so tokens.is_empty() triggers the bail.

Common situations: AI model returns an empty command field; prompt/response parsing strips everything; upstream truncation leaves only whitespace; a suggestion template whose placeholder was never filled.

Related errors

• prompt is empty
• Token cannot be empty
• todo title cannot be empty
• No prompt provided. Usage: f agents run {} "your prompt here
• agent run requires a non-empty query

AI-assisted analysis of nikivdev/code@a747e741ae (2026-09-01). Data as JSON: /api/errors/f3fca83165acdfec. Report an issue: GitHub.