Method confirm_inline_snap

server/src/server/prefix_cache.cpp:295–330

        return;
    }
    disabled_ = false;
    std::fprintf(stderr, "[pc] enabled: cap=%d family=%s\n", cap_, markers_.family.c_str());
}

// ── LRU helpers ─────────────────────────────────────────────────────────

int PrefixCache::find_entry(const PrefixHash & h) const {
    for (int i = 0; i < (int)entries_.size(); i++) {
        if (entries_[i].hash == h) return i;
    }
    return -1;
}

void PrefixCache::move_to_end(int idx) {
    if (idx < 0 || idx >= (int)entries_.size()) return;
    auto e = std::move(entries_[idx]);
    entries_.erase(entries_.begin() + idx);
    entries_.push_back(std::move(e));
}

int PrefixCache::find_full_entry(const PrefixHash & h) const {
    for (int i = 0; i < (int)full_entries_.size(); i++) {
        if (full_entries_[i].hash == h) return i;
    }
    return -1;
}

void PrefixCache::move_full_to_end(int idx) {
    if (idx < 0 || idx >= (int)full_entries_.size()) return;
    auto e = std::move(full_entries_[idx]);
    full_entries_.erase(full_entries_.begin() + idx);
    full_entries_.push_back(std::move(e));
}

// ── Inline prefix cache ─────────────────────────────────────────────────

std::pair<int, int> PrefixCache::lookup(const std::vector<int32_t> & prompt_ids) {
    if (disabled_) return {-1, 0};