diff --git a/src/AVEVA.Historian.Client/Wcf/HistorianHistoricalWriteProtocol.cs b/src/AVEVA.Historian.Client/Wcf/HistorianHistoricalWriteProtocol.cs
index 9fbbcef..b5639be 100644
--- a/src/AVEVA.Historian.Client/Wcf/HistorianHistoricalWriteProtocol.cs
+++ b/src/AVEVA.Historian.Client/Wcf/HistorianHistoricalWriteProtocol.cs
@@ -28,13 +28,13 @@ namespace AVEVA.Historian.Client.Wcf;
 ///     +0x26  UInt32  0                 // value high dword (constant zero)
 ///     +0x2A  value bytes, native width by tag type:
 ///                Float → Float32(4) · Double → Float64(8) · Int2 → Int16(2)
-///                Int4 → Int32(4) · UInt4 → UInt32(4) · UInt1 → UInt8(1)
+///                Int4 → Int32(4) · UInt4 → UInt32(4)
 ///                Int8 → Int64(8) · UInt8 → UInt64(8)
 /// </code>
 ///
 /// Live-captured for Float/Double/Int2/Int4/UInt4; Int8/UInt8 mirror the captured
-/// Double value layout (8 LE bytes) pending live round-trip. UInt1 is re-gated: the
-/// historian accepts EnsureTags(UInt1) but stores a degenerate tag — writes would fail.
+/// Double value layout (8 LE bytes) and are live-proven (2026-06-25). UInt1 is re-gated:
+/// the historian accepts EnsureTags(UInt1) but stores a degenerate tag — writes would fail.
 /// Other tag types have no captured value encoding and are rejected.
 /// </remarks>
 internal static class HistorianHistoricalWriteProtocol