super(message, cause);
        this.errorCode = errorCode;
    }

    /**
     * Gets the error code.
     *
     * @return the error code
     */
    public String getErrorCode() {
        return errorCode;
    }

        assertEquals(LlmException.ERROR_UNKNOWN, exception.getErrorCode());
    }

    @Test
    public void test_constructorWithMessageAndCauseDefaultsToUnknownErrorCode() {
        final RuntimeException cause = new RuntimeException("Root cause");
        final LlmException exception = new LlmException("Error occurred", cause);
        assertEquals(LlmException.ERROR_UNKNOWN, exception.getErrorCode());
    }

    @Test

            // LlmException from streamChatEnhanced already sent onError via callback - avoid double-send
            logger.warn("LLM error during stream request. sessionId={}, errorCode={}, message={}", sessionId, e.getErrorCode(),
                    e.getMessage(), e);
        } catch (final Exception e) {
            logger.warn("[RAG] Failed to process stream request. sessionId={}, message={}", sessionId, e.getMessage(), e);

            logger.warn("[RAG] LLM error during enhanced chat. sessionId={}, errorCode={}, error={}, elapsedTime={}ms",
                    session.getSessionId(), e.getErrorCode(), e.getMessage(), System.currentTimeMillis() - startTime, e);
            callback.onError("llm", e.getErrorCode());
            throw e;
        } catch (final Exception e) {