Function write_u64

server/src/server/disk_prefix_cache.cpp:178–178

    int window,
    const std::vector<int> & safe_boundaries,
    int min_tokens) {
    if (prompt_ids.empty() || recent_prompts.empty() || window <= 0) return 0;

    const int n_recent = std::min(window, (int)recent_prompts.size());