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Oliver Kieselbach
50e7590060
The IME processes the ESP app list in multiple passes (device-ESP evaluation ending Skipped, real install up to an hour later), and AppInstallSummary folded first observation -> last terminal across them: a 23-second app late in the queue reported 4002 s (session 44862cd3, "Set TimeZone"). Backend ingest: new max-folded LastAttemptStartedAt anchors DurationSeconds (CompletedAt - last attempt start; legacy rows without the anchor keep the span fallback), replay-guarded additive InstallPassCount, attempt-scoped DownloadDurationSeconds pairing, and a weaker-terminal guard (completed with state Skipped/Postponed never overrides Installed/Error, in-batch and in the cross-batch reconcile). StartedAt stays the earliest-wins window/version- ordering key. AppsDashboardProjection carries the new columns. AppVersionRegressionRadar: cutover gate — only attempt-anchored rows enter the duration population on BOTH comparison sides, so mixed-semantics medians can neither mask real regressions nor falsely re-arm active episodes. Time attribution: per-pass segment pairing replaces the first-start -> last-terminal hull. An app's seconds = sum of its ACTIVE segments (failed attempts and evaluation passes count; inter-pass idle gaps don't), occupancy merges the segments, hull endpoints remain for display and what-if bounds. Agent: a terminal->active transition re-arms BOTH timing endpoints, so event payload durationSeconds also describes the attempt. Web/PDF/MCP: labels and tooltips say "install time (final attempt)", the apps sessions table gets a xN multi-pass chip, the time-series chart carries a cutover footnote, MCP tool descriptions document the semantics split between get_app_install_metrics and get_time_attribution. No backfill: pre-cutover rows keep span values (documented in the public changelog). OKF doc: docs/backend/app-install-duration-attempt.md. Suites: Functions 4383, Agent 2407, MCP 564, Web 814 - all green, build 0/0. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>