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- Historian.md: Empty samples always Bad (writer/updater/read clamp), long-name refusal, 5 s bootstrap failure cache, AtTime after now, info-bit masking, HistoryUpdate does NOT type-check (M-1 decision), DeleteRaw needs both bounds, reverse Raw paging, the historian/historization metric prefixes, and provisioning numeric-only lines qualified as Gateway. - CLAUDE.md numeric-only lines qualified as Gateway backend. - Stale 'sole historian' lines in DriverLifecycle, ServiceHosting and the retired Wonderware stub; Client.CLI exit-code contract. - ServerHistorianOptions: Endpoint/Backend XML docs untangled, Validate() indented; Program.cs comments are backend-neutral; T10 week-test day count. Claude-Session: https://claude.ai/code/session_01Ef2ozxS7QPanGT8uoATbTe