feat: add fish.audio TTS provider#353
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Add FishAudioTTS (capability=tts) so tts_selector auto-discovers a new high-quality, voice-clone-capable provider. Backend model is required per call: s1 (previous flagship, kept for compatibility), s2-pro (first S2 generation), s2.1-pro (latest flagship — inline emotion tags, 80+ languages), s2.1-pro-free (free tier for drafts). s1-mini and the speech-1.x tier have been removed from the current fish.audio API and are no longer supported. Voice cloning via reference_id with voice_id as a selector-compatible alias. Adds temperature/top_p/repetition_penalty sampling controls, optional sample_rate, opus output format, and a "low" latency tier. Cost is estimated per UTF-8 byte to match fish.audio billing. Includes a Layer 3 skill, .env.example entry, and unit tests. Verified end-to-end with s2.1-pro + reference_id: generated a 7-segment Japanese narration successfully.
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Summary
FishAudioTTS(capability=tts) sotts_selectorauto-discovers a new high-quality, voice-clone-capable TTS providers1(previous flagship, kept for compatibility),s2-pro(first S2 generation),s2.1-pro(latest flagship — inline emotion tags, 80+ languages),s2.1-pro-free(free tier for drafts).s1-miniand thespeech-1.xtier have been removed from the current fish.audio API and are no longer supported.reference_id, withvoice_idaccepted as a selector-compatible aliastemperature/top_p/repetition_penaltysampling controls, optionalsample_rate,opusoutput format, and alowlatency tier.agents/skills/fish-audio-tts/SKILL.md),.env.exampleentry, and unit testsTest plan
pytest tests/tools/test_fish_audio_tts.py -v— 14 passedFISH_AUDIO_API_KEYviatts_selector— verifieds2.1-pro+reference_idgenerating a 7-segment Japanese narration