What
Users can now @-mention audio files in their prompts. Claude Code sends the audio to Anthropic's speech-to-text service and injects a structured transcript into the conversation before Claude sees it.
Details
- The transcript is wrapped in
<audio-transcript filename="...">XML with optionalduration="M:SS"metadata - If transcription fails, an error variant is injected instead of silently dropping the attachment
- The reference panel regex that handles pasted/attached items now recognizes
[Audio #N]placeholders alongside existing[Image #N]and[Pasted text #N]entries - Governed by a new HIPAA-compatible permission:
allow_voice_file_transcription - Audio attachments are now passed through in subagent message filtering alongside image attachments
Evidence
Audio transcription handler (search for "audio-transcript" and "The user @-mentioned the audio file")
Strings lifted out of the shipped bundle, so the claim above can be checked against them.