Issues

• Client: additive acknowledgement decision API with a fail-closed mode

  bug
  OPCFoundation/UA-.NETStandard#4898 · Filter by author cristipogacean opened on Oct 23, 2026
  

• Client: stable notification identity and terminal acknowledgement state for delayed acknowledgement

  bug
  OPCFoundation/UA-.NETStandard#4897 · Filter by author cristipogacean opened on Oct 23, 2026
  

• Client: supported session hand-over: retire a session without closing it, and take over a saved session

  bug
  OPCFoundation/UA-.NETStandard#4896 · Filter by author cristipogacean opened on Oct 23, 2026
  

• Client: explicit admission controls for automatic communication recovery of managed sessions

  bug
  OPCFoundation/UA-.NETStandard#4895 · Filter by author cristipogacean opened on Oct 23, 2026
  

• Client: subscription acknowledgements can stall, ignore deferral, or confirm messages of a replacement subscription

  bug
  OPCFoundation/UA-.NETStandard#4894 · Filter by author cristipogacean opened on Oct 23, 2026
  

• Complete executable WoT CTT conformance coverage

  complianceenhancement
  OPCFoundation/UA-.NETStandard#4886 · Filter by author marcschier opened on Oct 22, 2026

• Codec: span-based zero-copy binary encoder and decoder (A6)

  enhancementperformance
  OPCFoundation/UA-.NETStandard#4873 · Filter by author romanett opened on Oct 21, 2026 · 2.1
  

• DI-based companions: one way to add device subtypes and their models to a server's DeviceSet (follow-up to #4825 / #4853)

  enhancement
  OPCFoundation/UA-.NETStandard#4872 · Filter by author biancode opened on Oct 21, 2026
  3

  

• Server and client: no BinaryEncoder/BinaryDecoder allocation per message

  enhancementperformance
  OPCFoundation/UA-.NETStandard#4871 · Filter by author romanett opened on Oct 21, 2026 · 2.1
  

• Perf regression due to wot changes

  bugperformance
  OPCFoundation/UA-.NETStandard#4869 · Filter by author marcschier opened on Oct 21, 2026
  

• Replace all Headers with SPDX headers:

  compliance
  OPCFoundation/UA-.NETStandard#4865 · Filter by author opcfoundation-org opened on Oct 20, 2026

• Peculiar reverse connect design/implementation allows multiple connections to the same client

  bug
  OPCFoundation/UA-.NETStandard#4863 · Filter by author Siyuan-Xu-Wapice opened on Oct 20, 2026
  1

• Server: when can MonitoredItemNotification pooling pay off again?

  enhancementperformance
  OPCFoundation/UA-.NETStandard#4819 · Filter by author romanett opened on Oct 16, 2026 · 2.1
  

• Tracking: server performance (sampling across cores, lock-free value store, sampling engine, zero-copy codec)

  enhancementperformance
  OPCFoundation/UA-.NETStandard#4783 · Filter by author romanett opened on Oct 14, 2026 · 2.1
  

• Server and client: allocation-free request fast path (pooled messages, no default headers, no AsyncLocal scopes)

  enhancementperformance
  OPCFoundation/UA-.NETStandard#4779 · Filter by author romanett opened on Oct 14, 2026 · 2.1
  

• Move XmlDecoder/XmlEncoder configuration to immutable options records

  enhancement
  OPCFoundation/UA-.NETStandard#4761 · Filter by author marcschier opened on Oct 13, 2026 · 2.1
  

• Redesign server NodeManager API: partitioned dispatch, fail-closed permissions, tiered providers

  enhancement
  OPCFoundation/UA-.NETStandard#4735 · Filter by author romanett opened on Oct 11, 2026 · 2.1
  

• [BLOCKED] Intermittent test-run hang: NUnit parallel dispatcher never hands over from the Parallel to the NonParallel shift

  bugdependencies
  OPCFoundation/UA-.NETStandard#4717 · Filter by author romanett opened on Oct 9, 2026
  1

  

• ProgramStateMachineState has wrong InitializationString and possible many other classes also

  1.5.378bugcodegen
  OPCFoundation/UA-.NETStandard#3770 · Filter by author Hevgen opened on May 14, 2026
  1

  

• Switch from NUnit/Moq to TUnit or replace Moq with alternative

  enhancement
  OPCFoundation/UA-.NETStandard#3646 · Filter by author marcschier opened on Mar 30, 2026 · 2.1
  1