Gemini 3.1 Flash TTS; AssemblyAI streaming

What's Changed

• feat(assemblyai): add universal-3-5-pro (now default) and Voice Focus streaming params by @dlange-aai in https://github.com/livekit/agents/pull/6119
• feat: add Gemini 3.1 flash TTS support, implement streaming response … by @thorwebdev in https://github.com/livekit/agents/pull/6134
• (google): fix formatting by @tinalenguyen in https://github.com/livekit/agents/pull/6142
• chore(examples): update livekit-agents version to >=1.6 in requirements.txt by @Bobronium in https://github.com/livekit/agents/pull/6150
• fix(openai): default reasoning_effort to 'none' for mini/nano models by @sarvesh4396 in https://github.com/livekit/agents/pull/6148
• feat(assemblyai): add streaming mode (latency/accuracy preset) param by @dlange-aai in https://github.com/livekit/agents/pull/6156
• feat(fishaudio): add speed/volume prosody params and default to s2.1-pro by @cshape in https://github.com/livekit/agents/pull/6159
• docs: add missing google_gemini_tts.py example to voice agents README by @detail-app[bot] in https://github.com/livekit/agents/pull/6155
• feat(soniox): support stt-rt-v5 with endpoint_sensitivity option by @mihafabcic-soniox in https://github.com/livekit/agents/pull/6126
• fix(xai): expose TTS websocket options by @nightcityblade in https://github.com/livekit/agents/pull/6095
• (phonic) hotfix: add a config that lists tools with forbid-speech-after-tool-call by @arunwpm-work in https://github.com/livekit/agents/pull/6143
• fix(workflows): normalize two-digit years in GetDOBTask by @he-yufeng in https://github.com/livekit/agents/pull/6124
• fix(azure): emit STT recognition usage metrics by @nightcityblade in https://github.com/livekit/agents/pull/6161
• (phonic): reuse ws connection across handoffs by @tinalenguyen in https://github.com/livekit/agents/pull/6163
• (google): surface context exhaustion error by @tinalenguyen in https://github.com/livekit/agents/pull/6144
• (inference): add assembly ai model by @tinalenguyen in https://github.com/livekit/agents/pull/6162
• docs(phonic): add forbid_speech_after_tool_call to README config table by @detail-app[bot] in https://github.com/livekit/agents/pull/6168
• feat(phonic): handle user text input by @tinalenguyen in https://github.com/livekit/agents/pull/6169
• livekit-agents@1.6.2 by @github-actions[bot] in https://github.com/livekit/agents/pull/6170

New Contributors

• @thorwebdev made their first contribution in https://github.com/livekit/agents/pull/6134
• @sarvesh4396 made their first contribution in https://github.com/livekit/agents/pull/6148

Full Changelog: https://github.com/livekit/agents/compare/livekit-agents@1.6.1...livekit-agents@1.6.2