PRecAnnot.Abstractions — Autodesk-free immutable contracts and DTOs;
PRecAnnot.Core — deterministic annotation planning and duplicate filtering;
PRecAnnot.Application — command registry and use-case orchestration;
PRecAnnot.Plant3D2026 — guarded adapter boundary; compilation against Plant 3D 2026 is blocked until the SDK/runtime is installed;
PRecAnnot.UI — idempotent Ribbon registration model, without legacy _netload;
PRecAnnot.Telemetry — local JSONL command-scope events, without project path/number;
PRecAnnot.Bundle.Tests and PRecAnnot.Core.Tests — architecture/core/packaging checks.

The first vertical slice is intentionally a dry-run planning slice. It does not mutate DWG until the Plant 3D 2026 adapter is compiled and runtime-tested on a controlled project.

Build:

dotnet build .\PRecAnnot2026.sln --configuration Release
dotnet test .\PRecAnnot2026.sln --configuration Release --no-build

When Plant 3D 2026 is installed, pass /p:Plant3D2026InstallDir=.... Autodesk assemblies are Private=false, CopyLocal=false and are never committed.