Converts MP3 audio into Feishu's voice message format and sends it as a native voice clip (not a downloadable file) to a user or chat. Typical workflow: verify environment, convert MP3→AMR (ffmpeg), upload to Feishu to obtain a file_key, then send with msg_type: "voice" and confirm delivery. Useful for broadcast voice notifications, private voice messages, and automating voice-based alerts.
Inferred: agents with Bash/Python ability and network access (Claude Code, Copilot/Code agents, generic Python-capable assistants).
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