zeph-scheduler 0.18.1

Cron-based periodic task scheduler with SQLite persistence for Zeph
Documentation 
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// SPDX-FileCopyrightText: 2026 Andrei G <bug-ops>
// SPDX-License-Identifier: MIT OR Apache-2.0

/// Sanitize a user-supplied task prompt before injecting it into the agent loop.
///
/// Truncates to 512 Unicode code points and strips control characters
/// (code points below U+0020, except `\n` and `\t`).
#[must_use]
pub fn sanitize_task_prompt(s: &str) -> String {
    s.chars()
        .take(512)
        .filter(|&c| c >= '\x20' || c == '\n' || c == '\t')
        .collect()
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn strips_control_chars() {
        assert_eq!(sanitize_task_prompt("hello\x01\x00world"), "helloworld");
    }

    #[test]
    fn preserves_newline_and_tab() {
        assert_eq!(
            sanitize_task_prompt("line1\nline2\ttab"),
            "line1\nline2\ttab"
        );
    }

    #[test]
    fn truncates_at_512_code_points() {
        let long = "a".repeat(1000);
        assert_eq!(sanitize_task_prompt(&long).chars().count(), 512);
    }

    #[test]
    fn handles_multibyte_boundary() {
        // 512 copies of a 3-byte char followed by ASCII — must not panic
        let s: String = "é".repeat(600);
        let result = sanitize_task_prompt(&s);
        assert_eq!(result.chars().count(), 512);
    }
}