tts-from-script

What this does

Turns a script.json (see shared/schemas/script.schema.json) into:

• <out>/tts/<id>.mp3 — one MP3 per line, id = <section_id>_<line_idx:02>
• <out>/timing.json — Timing data (per-line start / end / duration, plus total_duration)
• <out>/narration.wav — single merged audio track with line / section silences inserted

The Timing JSON is the contract every downstream skill reads.

When to use

Trigger when the user:

• has finished writing the narration and wants voiceover
• says "make TTS / 配音 / 口播 / 生成 narration"
• needs a timing.json to feed into narration-cut or future burn-subtitles-cn