docs(tts): document per-provider max_text_length caps (salvage #13825)#20389
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PR #13743 replaced the global MAX_TEXT_LENGTH=4000 with a per-provider table and a user-override 'max_text_length:' key, but the user-guide TTS page documented no length behaviour at all. Users hitting truncation had no way to discover the new caps or the override. Add an 'Input length limits' subsection after the existing Configuration YAML block: provider default caps (Edge 5000 / OpenAI 4096 / xAI 15000 / MiniMax 10000 / Mistral 4000 / Gemini 5000 / ElevenLabs model-aware / NeuTTS,KittenTTS 2000), ElevenLabs model_id -> cap table (5k-40k), an override example, and the validation rules (non-positive / non-integer / boolean values fall through to the provider default).
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Documents the per-provider input-character caps that Hermes uses to truncate TTS requests, plus the
max_text_lengthoverride under each provider's config section.Changes:
website/docs/user-guide/features/tts.md(+37)Verified against current
tools/tts_tool.py:PROVIDER_MAX_TEXT_LENGTH.ELEVENLABS_MODEL_MAX_TEXT_LENGTH(v3=5000, multilingual/english_sts=10000, flash_v2=30000, flash_v2_5=40000).Closes #13825 via salvage.
Original PR by @r266-tech — authorship preserved.