Function lcp_len

server/src/server/disk_prefix_cache.cpp:140–146

    // lengths are not worth a probe.
    if (prompt_len >= min_tokens) out.push_back(prompt_len);
    for (auto it = boundaries.rbegin(); it != boundaries.rend(); ++it) {
        if (*it >= min_tokens && *it < prompt_len) out.push_back(*it);
    }
    return out;
}

int disk_prefix_cache_fixed_boundary(const DiskPrefixCachePolicy & policy,
                                     int full_len,
                                     int min_tokens) {
    if (policy.mode != DiskPrefixCacheMode::Fixed) return 0;