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# Data and consumer migration
The latest approved scope permits target-guided diagnosis of general rules and fitting shared theory coefficients. Production target reads, copied tunes, per-song recipes and hidden phrase banks remain prohibited. Policy provenance records this development influence; these four targets are not an unseen evaluation set. A development weight artifact is not automatically a production resource.
The latest approved scope permits target-guided diagnosis of general rules and fitting shared theory coefficients. Production target reads, copied tunes, per-song recipes and hidden phrase banks remain prohibited. Policy provenance records this development influence; these four targets are not an unseen evaluation set. A development weight artifact is not automatically a production resource. The first table records the inherited migration at the starting revision; the selector-repair section below identifies this iteration's changes.
| Path | Action | Live consumer / reason |
|---|---|---|
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The formulas are general relative intervals and durations, not extracted phrases. Supporting discussion: [Berklee tension and resolution](https://www.berklee.edu/berklee-today/summer-2014/tension-and-resolution), [available tensions](https://college.berklee.edu/berklee-today-55), [Locrian natural six](https://www.jazz-guitar-licks.com/pages/guitar-scales-modes/modes-of-the-harmonic-minor-scale/the-locrian-natural-6-mode.html). No example melody from these sources was imported. Numerical bounds are project choices, not universal jazz rules. Authored resources retain MIT licensing.
Cold-build independence cannot establish provenance alone; review policy/code diffs too. No source score, target score, tuning, fret limit, runtime score schema, velocity or playback feel was changed.
## Selector repair at ef62af8
No scale, sequence, rhythm, harmony, lead-in, source-song or accompaniment vocabulary
was added or removed in this step. The live solo budget now names `histories=16`,
`per_state=24`, and `completed=8`; the obsolete `backtracks` setting is removed.
Role-level constructor-family weights were removed. Existing duration/metrical
preferences remain. Both roles still use all six strings and frets 1–12.
`Operators` now distinguishes scale thirds from written-chord arpeggios. Sequence
licensing is indexed once. Harmonic interval permissions, note objects and color
construction are memoized without changing their underlying theory rules.
Expensive validation can be deferred past cheap retrieval, but a candidate must
pass before it advances. The ordinary `Operators.at` diagnostic still returns
fully validated actions.
The old prefix-perceptron implementation was removed from `audition/fit_selection.py`.
Its replacement is `audition/structured_learning.py`, with the pinned optional
solver in `audition/requirements-training.txt`. Neither is imported by production.
`audition/phrase_candidates.py` exports ordinary completed alternatives without
accepting any target-file arguments. Failed development models remain under
`build/solo_reference_comparison/structured`; none is automatically copied to data.
`audition/train_completed.py` can form complete-output ranking constraints from
ordinary finished candidate reports. It verifies the source, role, vocabulary,
and evaluation version, and records explicit training dependencies. Its optional
staged data copy is for a subsequent ordinary cold build, not automatic promotion.