Deepened the R0.1 browse finding. QueryTag's constant rejection decodes to
ArchestrA.CloudHistorian.Contract.ErrorCode.InvalidPacketId (72): the btRequest needs
a QueryTag-specific packet-id header (the generic 0x6751/v1 header StartTagQuery accepts
is rejected). The semantic fields are known from CloudHistorian.Contract
(QueryHandle/QueryType/StartIndex/TagCount request; TagNames[]+TagMetadataBuffer response),
but the binary packet framing lives in native aahClient.dll — aahClientManaged.dll is
mixed-mode (ilspycmd cannot decompile it) and no managed assembly builds the buffer.
Finishing QueryTag needs native RE (Ghidra/IDA) or a live gRPC capture of the stock client.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01B6mcaT2PjRFKcogzp9UkfC
Joseph Doherty
4c9f0d476c