fix: fix tencent tts block cpu issue

[YiminW]

Note

Medium Risk
Changes startup and restart behavior in the Tencent TTS extension; mistakes could prevent the client from coming up or alter reconnect behavior under failure/auth-error conditions.

Overview
Prevents TencentTTSClient.start() from blocking the asyncio event loop by offloading synthesizer.wait_ready() to a worker thread, and fails fast with clearer errors when startup times out or the server rejects the request.

Updates the WebSocket synthesizer to set ready_event on synthesis failure (so callers don’t wait the full timeout), and changes stop() to skip auto-restart when an authentication error was observed. Adds regression tests covering non-blocking startup on failure and no-restart-on-auth-error, and bumps the extension version to 0.4.4.

^{Written by Cursor Bugbot for commit ff91b12. This will update automatically on new commits. Configure here.}

[cursor]

Cursor Bugbot has reviewed your changes and found 2 potential issues.

^{Bugbot Autofix is OFF. To automatically fix reported issues with cloud agents, enable autofix in the Cursor dashboard.}

[cursor]

Auth error causes permanent hang in synthesize_audio

High Severity

When stop() returns early due to an auth error, close() clears conn_ready_event but no restart is scheduled, so the event is never set again. Any subsequent synthesize_audio() call will hang forever at await self.conn_ready_event.wait(), and the auth_error check on the very next line is unreachable. The auth error guard was clearly intended to surface an exception to callers, but it can never execute.

Additional Locations (1)

• ai_agents/agents/ten_packages/extension/tencent_tts_python/tencent_tts.py#L280-L290

 

[cursor]

Fire-and-forget restart silently hangs on new exceptions

Medium Severity

start() now raises TimeoutError and RuntimeError where it previously never raised (old wait_ready always returned without exception). However, stop() calls start() via fire-and-forget asyncio.create_task, silently swallowing these new exceptions. When a reconnect attempt fails (e.g., transient network timeout), the exception is lost, self.synthesizer stays None, and conn_ready_event is never set — causing all subsequent synthesize_audio() calls to hang forever with no recovery or error signal.

Additional Locations (1)

• ai_agents/agents/ten_packages/extension/tencent_tts_python/tencent_tts.py#L203-L214