Audits the open format spec against the validator by breaking each documented
requirement. Four of five caught. The fifth is the doc's error: FORMAT.md said
check refuses any peak >= 0 dBFS, where the implementation is kind-dependent --
a bgm is a sum we produced and is refused at full scale, an se/voice is a disc
wave whose lossy decode overshoots and is allowed to +1.0.
The doc was wrong about our own export: confirm ships at +0.18 and the ADV voice
at +0.31. A consumer implementing a validator from FORMAT.md would have rejected
a valid tree -- the file that exists so someone can check our work without
trusting us. Corrected, with the +1.0 marked as a judgement.
Also closes the last unread authored value: audio.json's was carried as
stems_why only, so serde ignored the value. Now deserialised and asserted in the
exporter (only sum is implemented); the assertion is proved to fire.
Files, not fixes: a failed export leaves a tree with no manifest, and every tool
then says 'is that an export tree?' -- which nearly made me conclude the
validator was checking nothing.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01N7FiFFFwbvG2uxdcEh8HyF
77e217807a