export declare const ATTR_SPEECH_ID = "lk.speech_id";
export declare const ATTR_AGENT_LABEL = "lk.agent_label";
export declare const ATTR_START_TIME = "lk.start_time";
export declare const ATTR_END_TIME = "lk.end_time";
export declare const ATTR_RETRY_COUNT = "lk.retry_count";
/**
 * Provider-known correlation ids associated with this span (string[]).
 *
 * Populated by STT/TTS plugins when the id is either sent to the provider
 * (e.g. WS context_id) or returned by it (e.g. response request_id /
 * session_id), so it can be cross-referenced with the provider's logs for
 * debugging.
 */
export declare const ATTR_PROVIDER_REQUEST_IDS = "lk.provider_request_ids";
export declare const ATTR_PARTICIPANT_ID = "lk.participant_id";
export declare const ATTR_PARTICIPANT_IDENTITY = "lk.participant_identity";
export declare const ATTR_PARTICIPANT_KIND = "lk.participant_kind";
export declare const ATTR_JOB_ID = "lk.job_id";
export declare const ATTR_AGENT_NAME = "lk.agent_name";
export declare const ATTR_ROOM_NAME = "lk.room_name";
export declare const ATTR_SESSION_OPTIONS = "lk.session_options";
export declare const ATTR_AGENT_TURN_ID = "lk.generation_id";
export declare const ATTR_AGENT_PARENT_TURN_ID = "lk.parent_generation_id";
export declare const ATTR_USER_INPUT = "lk.user_input";
export declare const ATTR_INSTRUCTIONS = "lk.instructions";
export declare const ATTR_SPEECH_INTERRUPTED = "lk.interrupted";
export declare const ATTR_CHAT_CTX = "lk.chat_ctx";
export declare const ATTR_FUNCTION_TOOLS = "lk.function_tools";
export declare const ATTR_PROVIDER_TOOLS = "lk.provider_tools";
export declare const ATTR_TOOL_SETS = "lk.tool_sets";
export declare const ATTR_RESPONSE_TEXT = "lk.response.text";
export declare const ATTR_RESPONSE_FUNCTION_CALLS = "lk.response.function_calls";
/** Time to first token in seconds. */
export declare const ATTR_RESPONSE_TTFT = "lk.response.ttft";
export declare const ATTR_FUNCTION_TOOL_ID = "lk.function_tool.id";
export declare const ATTR_FUNCTION_TOOL_NAME = "lk.function_tool.name";
export declare const ATTR_FUNCTION_TOOL_ARGS = "lk.function_tool.arguments";
export declare const ATTR_FUNCTION_TOOL_IS_ERROR = "lk.function_tool.is_error";
export declare const ATTR_FUNCTION_TOOL_OUTPUT = "lk.function_tool.output";
export declare const ATTR_TTS_INPUT_TEXT = "lk.input_text";
export declare const ATTR_TTS_STREAMING = "lk.tts.streaming";
export declare const ATTR_TTS_LABEL = "lk.tts.label";
/** Time to first byte in seconds. */
export declare const ATTR_RESPONSE_TTFB = "lk.response.ttfb";
export declare const ATTR_EOU_PROBABILITY = "lk.eou.probability";
export declare const ATTR_EOU_UNLIKELY_THRESHOLD = "lk.eou.unlikely_threshold";
export declare const ATTR_EOU_DELAY = "lk.eou.endpointing_delay";
export declare const ATTR_EOU_LANGUAGE = "lk.eou.language";
/** Which signal triggered the EOU detection: 'vad' | 'stt' | 'manual'. */
export declare const ATTR_EOU_SOURCE = "lk.eou.source";
/** True when the audio EOT detector resolved this prediction from its
 * inference-window cache instead of running a fresh predict. */
export declare const ATTR_EOU_FROM_CACHE = "lk.eou.from_cache";
/** Latest input-audio creation time → prediction receive time (ms). */
export declare const ATTR_EOU_DETECTION_DELAY = "lk.eou.detection_delay";
export declare const ATTR_USER_TRANSCRIPT = "lk.user_transcript";
export declare const ATTR_TRANSCRIPT_CONFIDENCE = "lk.transcript_confidence";
export declare const ATTR_TRANSCRIPTION_DELAY = "lk.transcription_delay";
export declare const ATTR_END_OF_TURN_DELAY = "lk.end_of_turn_delay";
export declare const ATTR_AMD_CATEGORY = "lk.amd.category";
export declare const ATTR_AMD_REASON = "lk.amd.reason";
export declare const ATTR_AMD_IS_MACHINE = "lk.amd.is_machine";
export declare const ATTR_AMD_INTERRUPT_ON_MACHINE = "lk.amd.interrupt_on_machine";
/** Total user-speech duration captured before the AMD verdict (milliseconds). */
export declare const ATTR_AMD_SPEECH_DURATION = "lk.amd.speech_duration";
/** Time between speech end and the AMD verdict emission (milliseconds). */
export declare const ATTR_AMD_DELAY = "lk.amd.delay";
export declare const ATTR_AMD_TRANSCRIPT = "lk.amd.transcript";
export declare const ATTR_IS_INTERRUPTION = "lk.is_interruption";
export declare const ATTR_INTERRUPTION_PROBABILITY = "lk.interruption.probability";
export declare const ATTR_INTERRUPTION_TOTAL_DURATION = "lk.interruption.total_duration";
export declare const ATTR_INTERRUPTION_PREDICTION_DURATION = "lk.interruption.prediction_duration";
export declare const ATTR_INTERRUPTION_DETECTION_DELAY = "lk.interruption.detection_delay";
export declare const ATTR_LLM_METRICS = "lk.llm_metrics";
export declare const ATTR_TTS_METRICS = "lk.tts_metrics";
export declare const ATTR_REALTIME_MODEL_METRICS = "lk.realtime_model_metrics";
/** End-to-end latency in seconds. */
export declare const ATTR_E2E_LATENCY = "lk.e2e_latency";
export declare const ATTR_GEN_AI_OPERATION_NAME = "gen_ai.operation.name";
export declare const ATTR_GEN_AI_REQUEST_MODEL = "gen_ai.request.model";
/** The provider name (e.g., 'openai', 'anthropic'). */
export declare const ATTR_GEN_AI_PROVIDER_NAME = "gen_ai.provider.name";
export declare const ATTR_GEN_AI_USAGE_INPUT_TOKENS = "gen_ai.usage.input_tokens";
export declare const ATTR_GEN_AI_USAGE_OUTPUT_TOKENS = "gen_ai.usage.output_tokens";
export declare const ATTR_GEN_AI_USAGE_INPUT_TEXT_TOKENS = "gen_ai.usage.input_text_tokens";
export declare const ATTR_GEN_AI_USAGE_INPUT_AUDIO_TOKENS = "gen_ai.usage.input_audio_tokens";
export declare const ATTR_GEN_AI_USAGE_INPUT_CACHED_TOKENS = "gen_ai.usage.input_cached_tokens";
export declare const ATTR_GEN_AI_USAGE_OUTPUT_TEXT_TOKENS = "gen_ai.usage.output_text_tokens";
export declare const ATTR_GEN_AI_USAGE_OUTPUT_AUDIO_TOKENS = "gen_ai.usage.output_audio_tokens";
export declare const EVENT_GEN_AI_SYSTEM_MESSAGE = "gen_ai.system.message";
export declare const EVENT_GEN_AI_USER_MESSAGE = "gen_ai.user.message";
export declare const EVENT_GEN_AI_ASSISTANT_MESSAGE = "gen_ai.assistant.message";
export declare const EVENT_GEN_AI_TOOL_MESSAGE = "gen_ai.tool.message";
export declare const EVENT_GEN_AI_CHOICE = "gen_ai.choice";
export declare const ATTR_EXCEPTION_TRACE = "exception.stacktrace";
export declare const ATTR_EXCEPTION_TYPE = "exception.type";
export declare const ATTR_EXCEPTION_MESSAGE = "exception.message";
export declare const ATTR_LANGFUSE_COMPLETION_START_TIME = "langfuse.observation.completion_start_time";
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