Unify db api

engine/.env.example

@@ -11,9 +11,16 @@ PORT=8000
 # EXTERNAL_IP=1.2.3.4
 
 # Backend bridge (optional)
+# BACKEND_MODE=auto|http|disabled
+BACKEND_MODE=auto
 BACKEND_URL=http://127.0.0.1:8100
 BACKEND_TIMEOUT_SEC=10
+HISTORY_ENABLED=true
 HISTORY_DEFAULT_USER_ID=1
+HISTORY_QUEUE_MAX_SIZE=256
+HISTORY_RETRY_MAX_ATTEMPTS=2
+HISTORY_RETRY_BACKOFF_SEC=0.2
+HISTORY_FINALIZE_DRAIN_TIMEOUT_SEC=1.5
 
 # Audio
 SAMPLE_RATE=16000
@@ -23,57 +30,21 @@ CHUNK_SIZE_MS=20
 DEFAULT_CODEC=pcm
 MAX_AUDIO_BUFFER_SECONDS=30
 
-# VAD / EOU
-VAD_TYPE=silero
-VAD_MODEL_PATH=data/vad/silero_vad.onnx
-# Higher = stricter speech detection (fewer false positives, more misses).
-VAD_THRESHOLD=0.5
-# Require this much continuous speech before utterance can be valid.
-VAD_MIN_SPEECH_DURATION_MS=100
-# Silence duration required to finalize one user turn.
-VAD_EOU_THRESHOLD_MS=800
+# Agent profile selection (optional fallback when CLI args are not used)
+# Prefer CLI:
+#   python -m app.main --agent-config config/agents/default.yaml
+#   python -m app.main --agent-profile default
+# AGENT_CONFIG_PATH=config/agents/default.yaml
+# AGENT_PROFILE=default
+AGENT_CONFIG_DIR=config/agents
 
-# LLM
-OPENAI_API_KEY=your_openai_api_key_here
-# Optional for OpenAI-compatible providers.
-# OPENAI_API_URL=https://api.openai.com/v1
-LLM_MODEL=gpt-4o-mini
-LLM_TEMPERATURE=0.7
-
-# TTS
-# edge: no API key needed
-# openai_compatible: compatible with SiliconFlow-style endpoints
-TTS_PROVIDER=openai_compatible
-TTS_VOICE=anna
-TTS_SPEED=1.0
-
-# SiliconFlow (used by TTS and/or ASR when provider=openai_compatible)
-SILICONFLOW_API_KEY=your_siliconflow_api_key_here
-SILICONFLOW_TTS_MODEL=FunAudioLLM/CosyVoice2-0.5B
-SILICONFLOW_ASR_MODEL=FunAudioLLM/SenseVoiceSmall
-
-# ASR
-ASR_PROVIDER=openai_compatible
-# Interim cadence and minimum audio before interim decode.
-ASR_INTERIM_INTERVAL_MS=500
-ASR_MIN_AUDIO_MS=300
-# ASR start gate: ignore micro-noise, then commit to one turn once started.
-ASR_START_MIN_SPEECH_MS=160
-# Pre-roll protects beginning phonemes.
-ASR_PRE_SPEECH_MS=240
-# Tail silence protects ending phonemes.
-ASR_FINAL_TAIL_MS=120
-
-# Duplex behavior
-DUPLEX_ENABLED=true
-# DUPLEX_GREETING=Hello! How can I help you today?
-DUPLEX_SYSTEM_PROMPT=You are a helpful, friendly voice assistant. Keep your responses concise and conversational.
-
-# Barge-in (user interrupting assistant)
-# Min user speech duration needed to interrupt assistant audio.
-BARGE_IN_MIN_DURATION_MS=200
-# Allowed silence during potential barge-in (ms) before reset.
-BARGE_IN_SILENCE_TOLERANCE_MS=60
+# Optional: provider credentials referenced from YAML, e.g. ${LLM_API_KEY}
+# LLM_API_KEY=your_llm_api_key_here
+# LLM_API_URL=https://api.openai.com/v1
+# TTS_API_KEY=your_tts_api_key_here
+# TTS_API_URL=https://api.example.com/v1/audio/speech
+# ASR_API_KEY=your_asr_api_key_here
+# ASR_API_URL=https://api.example.com/v1/audio/transcriptions
 
 # Logging
 LOG_LEVEL=INFO