final List<LlmMessage> history) {
        final long startTime = System.currentTimeMillis();
        if (logger.isDebugEnabled()) {
            logger.debug("[RAG:REGEN] Starting query regeneration. userMessage={}, failedQuery={}, failureReason={}", userMessage,
                    failedQuery, failureReason);
        }

        try {

        assertTrue(systemPrompt.contains("no_results"));
        // Verify placeholders are replaced
        assertFalse(systemPrompt.contains("{{userMessage}}"));
        assertFalse(systemPrompt.contains("{{failedQuery}}"));
        assertFalse(systemPrompt.contains("{{failureReason}}"));
    }

    @Test
    public void test_regenerateQuery_noRelevantResults_reason() {