Fish Audio SDK Skill

Use this skill to generate correct, runnable code with the official Fish Audio SDKs:

• Python: package fish-audio-sdk on PyPI, imported as fishaudio. (The same wheel still ships a separate legacy fish_audio_sdk package. Do not mix them; everything here is the modern fishaudio package.)
• JavaScript / TypeScript: package fish-audio on npm, imported as FishAudioClient.

If the user wants raw curl / HTTP / WebSocket without installing an SDK, use the fish-audio-api skill instead.

This file is the index. Deeper, task-specific rules and full examples live in references/. Read the reference for the task you're doing before writing code.

Global facts

• Auth: both SDKs read the API key from the FISH_API_KEY environment variable automatically. Get keys at https://fish.audio/app/api-keys. Never hardcode a key.
• Base URL: https://api.fish.audio (override with base_url= in Python / baseUrl: in JS).
• TTS models: the API supports s1 (deprecated), s2-pro, s2.1-pro (recommended for production), and s2.1-pro-free (free tier). Do not choose s1 for new code: S1 is deprecated and will be retired on December 31, 2026. After that date, requests that specify s1 are served by s2.1-pro (migration: https://docs.fish.audio/developer-guide/models-pricing/migrate-from-s1). However, the Python SDK types model as only s1 and s2-pro (plus the deprecated speech-1.x), default s2-pro. The JS package on npm (fish-audio 0.1.0) types backend without s2-pro or s2.1-pro and defaults it to "s1" at runtime (its README says "s2-pro"), so in JS always pass backend explicitly. Both SDKs forward the model value without runtime validation, so "s2.1-pro" works over the wire. Static type checkers will flag it, so add # type: ignore (Python) / an as cast (TS), or use the fish-audio-api skill for raw calls. speech-1.5 / speech-1.6 are deprecated. In Python pass model="s2-pro" (keyword); in JS pass the positional backend argument.
• ASR models: use transcribe-1-pro (recommended: speaker turns, long recordings, emotion cues). Neither SDK has an ASR model argument: send the model: transcribe-1-pro HTTP header on every request (Python RequestOptions(additional_headers=...), JS requestOptions.headers). A request without it is served and billed as transcribe-1, the model for short recordings. See references/speech-to-text.md.
• Audio formats: mp3 (default), wav, pcm, opus.
• Playback in examples: play() shells out to a system audio tool: Python uses ffmpeg/ffplay (or mpv), JS uses ffplay. It is for local/desktop use; in a server, save() to a file or stream the bytes instead. See references/installation.md.