feat(eval): ambient key-honesty variants — flat-side major pad + drone (PR-G6) - #215
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…e (accuracy PR-G6)
Two new abstention clips harden the sparse/beatless surface beyond the
single A-minor pad: ambient_beatless_Db_major (flat-side major, key
folds enharmonically to the C# Major read) and ambient_drone_60 (one
sustained E-minor triad, 32 beats — no harmonic motion, the hardest
honest-key case). Both pass every check at baseline: key exact,
bpmConfidence 0.127/0.156 under the 0.4 honesty cap, meter on the
assumed-4/4 fallback, swingDetail absent. No knownGaps, no product
code changes — PR-G6's mandate ('fix only what the abstention checks
prove wrong') is satisfied by proof rather than fixes.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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What
PR-G6 of the genre-generalization program: hardens the sparse/beatless abstention surface with two new corpus clips (40 total). The program plan scoped G6 as 'add the abstention checks and fix only what they prove wrong' — the checks prove nothing wrong, so this PR is proof, not fixes.
ambient_beatless_Db_major— flat-side major pad at 66 BPM (the original clip was A minor only). Key reads C# Major, which the harness folds enharmonically. All honesty checks pass (bpmConfidence 0.127 ≤ 0.4, meter on the assumed-4/4 fallback, swingDetail absent).ambient_drone_60— a single sustained E-minor triad for 32 beats: no harmonic motion, the hardest honest-key case. Key exact, bpmConfidence 0.156, full abstention.render_ambient_padgains optionaldegrees/beats_per_chordparameters (the drone isdegrees=[1]); no product-path changes.Validation
npm run verify: 51 smoke passed (no UI changes).🤖 Generated with Claude Code