[Copilot]

Thanks for asking me to work on this. I will get started on it and keep this PR's description up to date as I form a plan and make progress.

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This section details on the original issue you should resolve

<issue_title>Port upstream CDT changes to C# (15c1540) — 2026-10-26</issue_title>
<issue_description>## Upstream Sync Task

@copilot please port the upstream changes listed below to C# and open a pull request.

New commits have been pushed to artem-ogre/CDT since the last sync.

What to port

Please port all upstream C++ changes to C# and open a pull request.

Key files to check in the upstream diff:

• CDT/include/CDT.h and CDT/include/CDT.hpp → port any algorithm changes to src/CDT.Core/
• CDT/include/Predicates.h → port to src/CDT.Core/Predicates.cs
• CDT/include/KDTree.h → port to src/CDT.Core/KdTree.cs
• Any new types or utilities → port to src/CDT.Core/Types.cs or new files as appropriate

After porting:

1. Run dotnet test and ensure all tests pass
2. Update test inputs/expected outputs if needed</issue_description>

• Closes Port upstream CDT changes to C# (15c1540) — 2026-10-26 #29

<agent_instructions>Port all changes since last time we ported changes.</agent_instructions>

Comments on the Issue (you are @copilot in this section)

• Fixes Port upstream CDT changes to C# (15c1540) — 2026-10-26 #29

[MichaConrad]

@copilot retry