[真实流程计时]：完成完整链路耗时输出，包含命令时间、LLM发送时间和阶段响应耗时

openspec/changes/separate-wake-and-realtime-transcript/specs/voice-pet-pipeline/spec.md

@@ -161,6 +161,13 @@ The system SHALL support scripted full-chain acceptance that drives the live pip
 - **THEN** the command SHALL still synthesize local TTS output and emit pipeline playback events
 - **AND** it SHALL skip actual speaker output for automated or quiet environments
 
+#### Scenario: Real provider check reports timing diagnostics
+- **WHEN** the developer runs `.venv/bin/python -m owner_voice_pet real-live-check --turns 2`
+- **THEN** the JSON output SHALL include `timing.started_at`, `timing.finished_at`, `timing.duration_ms`, `timing.phases`, `timing.events`, and `timing.stage_timings`
+- **AND** `timing.stage_timings` SHALL include turn-scoped durations for wake wait, acknowledgement, wait-for-speech, capture, final STT, LLM-to-first-TTS, TTS playback, and full turn when the corresponding events are emitted
+- **AND** the JSON output SHALL include `llm_request_timings` with one item per LLM call containing `sent_at`, `sent_offset_ms`, `first_delta_ms`, `finished_at`, `duration_ms`, `message_count`, and a short last-user preview
+- **AND** the timing output SHALL NOT contain API keys, raw audio payloads, denoised audio payloads, or full secret-bearing provider request headers
+
 ### Requirement: Wake acknowledgement before recording
 The live runtime SHALL provide an audible local acknowledgement after local wake detection and before it starts recording the user's formal question.