This repository is a Home Assistant custom component that adds OpenAI-compatible text-to-speech to a HA instance. It is distributed as an integration for HACS and registered as a config-flow service integration. In production it exposes TTS entities, an `openai_tts.say` service that announces text to media players with automatic volume save/restore and optional chimes, and an `openai_tts.set_api_key` service for credential rotation. The architecture is a HA integration split into focused modules: config flow and profile subentries, a streaming TTS engine, a sentence-level audio pipelining layer, an ffmpeg-based loudness pipeline, push-driven API health tracking, cache and validation logic, repairs, diagnostics, and a large announcement orchestration module. Provider support is driven by declarative presets for OpenAI, Mistral, Groq, Lemonfox, Kokoro, Chatterbox, and custom OpenAI-compatible endpoints, and the code intentionally modern-targets HA's streaming TTS contract rather than retaining legacy fallback paths.