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Oliver Kieselbach
321ae63c63
versionBreakdown on the app analytics responses now carries measuredInstalls,
medianDurationSeconds and p95DurationSeconds per version (measured population:
succeeded, non-skip, plausible duration, no AppId collision). A new pure
AppVersionRegressionRadar detects "median install duration rose from X to Y min
after version Z": versions ordered by first-seen install time (never string
sort), fires at median lift >=2x AND >=300s absolute with >=10 measured
installs on both sides.
Episodes follow the rule-radar pattern in a fourth tracker keyspace
appversionregression|{app}|{version} (409-dedup, refresh keeps FirstNotifiedAt,
re-arm on drain / median back under 1.5x, 30d retention sweep re-arms): one
tenant bell app_version_duration_regression (Admin audience, appDetailUrl href)
plus one AppVersionDurationRegression ops event per episode, dual-registered in
the web OPS_EVENT_TYPES catalog. Runs in the maintenance timer after the rule
radar over one cross-tenant 35d install-summary read; kill switch
AppVersionRegressionRadarDisabled (fail-open). Apps detail page shows an amber
regression banner and a median-duration-by-version chart; OKF concept doc added.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>