feat(crosspost): H7 taste-cohort shadow + freeze H6/H7 plan - #348
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Log n_taste_likes / taste_boost_shadow on RU ranker decision_log without re-ranking. Freeze falsifiable H6 (v4 mature 8-12/17) and H7 (shadow 8-24) gates in HYPOTHESES + experiment note for future readout.
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Summary
n_taste_likes,taste_boost_shadow,taste_cohort_versionto RU crosspost decision_log candidates (does not change pick).src/crossposting/data/ru_taste_cohort_v1.json(train time-split, offline lift 1.19).experiments/active/2026-08-10-crosspost-v4-and-taste-cohort.mddocs/analyst/crossposting-taste-shadow.sqlTest plan
pytest tests/crossposting/ -q --noconftest(4 passed)n_taste_likeson candidatescrossposting-v4-like-volume.sql→ fill Metrics aftercrossposting-taste-shadow.sqlquery 4 → H7 pass/fail