{% if usage.prompt_cache is defined %}
{% from '_cache_kpis.html' import cache_kpis %}
{% set cache = usage.prompt_cache %}
<section class="detail-section" id="provider-prompt-cache" aria-label="Provider prompt cache">
    <h2>Provider prompt cache {% if cache.attention %}<span class="badge badge-warning">Needs attention</span>{% endif %}</h2>
    {{ cache_kpis(cache.read_percent, cache.hit, cache.hit + cache.write + cache.no_reuse, cache.cached_tokens, cache.cache_write_tokens) }}
    <p>{{ cache.hit }} call{{ '' if cache.hit == 1 else 's' }} with reuse · {{ cache.write }} cache write{{ '' if cache.write == 1 else 's' }} without reuse · {{ cache.no_reuse }} call{{ '' if cache.no_reuse == 1 else 's' }} without reuse.</p>
    {% if cache.disabled %}<p class="error-message">Caching was disabled on {{ cache.disabled }} call{{ '' if cache.disabled == 1 else 's' }}. Enable provider prompt caching on that request path.</p>{% endif %}
    {% if cache.configuration_warning %}<p class="error-message">Cache options were dropped or unsupported on {{ cache.configuration_warning }} call{{ '' if cache.configuration_warning == 1 else 's' }}. Check provider SDK compatibility.</p>{% endif %}
    {% if cache.unknown %}<p>{{ cache.unknown }} {{ 'call has' if cache.unknown == 1 else 'calls have' }} unknown cache usage. Capture the provider's cache read/write counters to diagnose them.</p>{% endif %}
    {% for warning in cache.warnings %}<p class="badge-warning">{{ warning.model }}: {{ warning.message }}{% if warning.count and warning.count > 1 %} ({{ warning.count }} calls){% endif %}</p>{% endfor %}
    {% if cache.models|length > 1 %}
    <div class="usage-table-scroll"><table><thead><tr><th>Provider / model</th><th class="num">Reads</th><th class="num">Writes only</th><th class="num">No reuse</th><th class="num">Disabled</th><th class="num">Unknown</th></tr></thead><tbody>
    {% for row in cache.models %}<tr><th>{{ row.label }}</th><td class="num">{{ row.hit }}</td><td class="num">{{ row.write }}</td><td class="num">{{ row.no_reuse }}</td><td class="num{{ ' is-bad' if row.disabled else '' }}">{{ row.disabled }}</td><td class="num{{ ' is-warn' if row.unknown else '' }}">{{ row.unknown }}</td></tr>{% endfor %}
    </tbody></table></div>
    {% endif %}
    <p>First requests, short prompts and expired entries may have no reuse. Warnings identify configuration problems or observed drops; they do not prove the provider cache is broken. Prompt caching reduces repeated input processing; generated output is still billed.</p>
</section>
{% endif %}