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feat(music-data): reuse cached chart statistics of unchanged model sources - #29
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Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
…urces music-data --stats-cache DIR keeps each chart's deck statistics under the SHA-256 of the deck model's sources, the options, the master tables and the chart, and measures only the charts it lacks. The deck model's provenance names the SHA-256 of its sources (sourceSha256), and the summary counts cached and measured charts (deckStats). Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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ournotes_sim::SOURCE_SHA256is the SHA-256 of the deck model's sources.nnnotes._deck.info()andprovenance.deckname it assourceSha256(schema and docs updated).music-data --stats-cache DIRkeeps each chart's deck statistics inDIRunder the SHA-256 of what they are a function of: the model's sources,--seedsand the aptitude options, the master tables of the deck input and the chart. Charts found there are not measured again, so an export after a deck release that keeps the model sources (for example a search-only release), or after a master data update that keeps those tables, measures only what changed.DIRthen holds this export's charts only.deckStats).Tests: a cached export writes the same file as an uncached one and measures no chart the second time; a new model source digest or new options measure every chart again and replace the cache; the key follows the master tables and each chart.
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