Forward audio inputs to the Responses API - #33932
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## Why Audio variants were available in the user-input protocol but were replaced with unsupported-input placeholders instead of being sent to the model. ## What changed - Serialize audio data URLs as `input_audio` content and convert local `wav`, `mp3`, `m4a`, `webm`, and `ogg` files to labeled data URLs. - Validate and canonicalize base64 audio before requests, enforce the 50 MiB input limit, and replace invalid, unsupported, or oversized audio with explanatory text. - Preserve audio attachments when mapping response items back to user-message events and document the app-server input variants. ## Testing - Add unit coverage for local-file conversion, data URL validation, size and format errors, event mapping, and attachment extraction. - Add client tests that verify data URL and local audio payloads sent to the Responses API. GitOrigin-RevId: f72cd6b6e43ab12757eeb47621b1d670594ac7d9
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Forward audio inputs to the Responses API
Why
Audio variants were available in the user-input protocol but were replaced with unsupported-input placeholders instead of being sent to the model.
What changed
input_audiocontent and convert localwav,mp3,m4a,webm, andoggfiles to labeled data URLs.Testing