Ten shell tools plus FORMAT.md and MIX.md, written 2026-07-29 and untracked
since: stem-stats, energy-profile, onset-detect, silence-detect,
transition-detect, mix-meta, mix-render, mix-normalize, mix-master, lufs-check,
and lib/progress.sh. FORMAT.md defines a <project>.mix.json metadata contract
whose tools 'read existing metadata and augment (don't overwrite unless told)'.

Committed with the exec bit set IN THE INDEX, which is the part that bites:
3fdf5b97 had to restore it on 63 scripts, and MIX.md invokes every one of these
as ./stem-stats. A file that is executable in the working tree and 100644 in
git is executable exactly until someone else clones it. Note also that
'git commit -- path' silently drops a staged mode flip (the trap 1667bb02
documented), so this went in without a pathspec after proving nothing else
was staged.

mix/take94's 833 MB stayed out (a5a5b37). The scripts are the artifact; the
take is the input.

⚠️ Flagged, not resolved: this overlaps ../tidal-ears' mastering CLI, which is
the canonical recipe per MASTERING.md. Two toolboxes that both master a set is
the shape feedback_one_parser_per_concept warns about. I am not merging them
blind — committing first so the overlap is visible in one tree instead of
half-invisible in an untracked directory. PLN's call which one is the spine.

    ten small knives in a drawer nobody opened,
    sharp the whole time.