Function startup_sweep 

pub fn startup_sweep(
    home: &Path,
    now_ms: i64,
    probe: &dyn ProcessProbe,
) -> SweepReport

Log retention, dead stdout dirs, aged created.*, resume-lock files whose owner is dead, opencode-pair.exe.old (Windows), sentinel files without a record older than 24 h and *.tmp-* claim temps older than 24 h.