Function suggest_with_fallback 

pub fn suggest_with_fallback(
    prefix: &str,
    model: Option<&MarkovModel>,
    config: &ShellConfig,
) -> Vec<(String, f32)>

Suggestion with graceful degradation and timeout handling.

This function applies all hardening measures:

• Prefix truncation if too long
• Timeout-based suggestion generation
• Quality filtering
• Security filtering
• Result limiting

Arguments

• prefix - The command prefix to complete
• model - Optional model reference (returns empty if None)
• config - Configuration with limits

Example

use aprender_shell::config::{ShellConfig, suggest_with_fallback};
use aprender_shell::model::MarkovModel;

let config = ShellConfig::fast();
// Without model - returns empty
let suggestions = suggest_with_fallback("git ", None, &config);
assert!(suggestions.is_empty());