Consume the extracted source-generator toolkit from its package

CLAUDE.md

@@ -43,7 +43,7 @@ The opt-in lives in `.sonarlint/sonar-local.props` (analyzer package) and `.sona
 | `Semantics.Music` | Immutable musical value types (`Pitch`, `Interval`, `Scale`, `Chord`, `Key`, `Duration`, `TimeSignature`) plus an analysis aggregate layer (`Progression`, `Section`, `Arrangement`, `Form`) computing roman numerals, cadences, key inference, chromatic identification, and named forms. Targets `net8.0`–`net10.0` + `netstandard2.0`/`netstandard2.1`. |
 | `Semantics.Color` | Physically-grounded color types. Canonical linear-RGB `Color` hub plus color-space satellites (`Srgb`, `Hsl`, `Hsv`, `Oklab`, `Oklch`); every type converts to and from every other, routed through the nearest shared hub (`Srgb` within the sRGB family, `Oklab` within the perceptual family, linear `Color` across families) so no conversion takes a redundant gamma round-trip. Also WCAG accessibility tooling, HSL/perceptual adjustment operations (lighten/saturate/hue/invert), and `NamedColors`. Targets `net8.0`–`net10.0` + `netstandard2.0`/`netstandard2.1`. |
 | `Semantics.Quantities` | Hand-written runtime types (`PhysicalQuantity<TSelf, T>`, `IVector0`..`IVector4`, `UnitSystem`) plus generator output under `Generated/`. |
-| `Semantics.SourceGenerators` | Roslyn incremental generators that emit quantity types, units, conversions, magnitudes, physical constants, and storage-type helpers from metadata. The C# syntax templates now come from `ktsu.CodeBlocker.Templates`; `CodeGen/` holds what is left that is not specific to physics — the metadata-driven generator base, metadata loading, the diagnostic catalogue — and is being extracted into a shared toolkit (#181). |
+| `Semantics.SourceGenerators` | Roslyn incremental generators that emit quantity types, units, conversions, magnitudes, physical constants, and storage-type helpers from metadata. Only the physics-specific half lives here — `Models/`, `Metadata/`, `Generators/`, and the bindings in `SemanticsGenerator`/`SemanticsDiagnostics`/`Emit`. The C# syntax templates come from `ktsu.CodeBlocker.Templates`; the metadata-driven generator base, metadata loading and the diagnostic catalogue come from `ktsu.SourceGeneratorToolkit` (#181, #192). |
 | `Semantics.Quantities.{Double,Float,Decimal}` | Props-only satellite packages. Each ships a `buildTransitive` props file (generated by `scripts/Generate-AliasProps.ps1`) that injects global-using aliases binding every quantity to one storage type, so consumers write `Mass` instead of `Mass<double>`. |
 | `Semantics.Test` | MSTest project covering all of the above. |
 
@@ -170,7 +170,7 @@ var converted = sourceString.As<SourceType, TargetType>();
 
 ### Working with the source generator
 
-- A generator declares the metadata files it reads via `MetadataFileNames` and derives from `SemanticsGenerator<T>` (one file) or `SemanticsMultiFileGenerator` (several). Neither needs to override `Initialize`.
+- A generator declares the metadata files it reads via `MetadataFileNames` and derives from `SemanticsGenerator<T>` (one file) or `SemanticsMultiFileGenerator` (several). Neither needs to override `Initialize`. Those two bind this repository's diagnostic catalogue and file header onto `GeneratorBase`/`GeneratorBase<T>` from `ktsu.SourceGeneratorToolkit`; that binding is the seam that keeps the package consumer-agnostic, so keep repository-specific detail on this side of it.
 - Emitted C# is described with the template model from `ktsu.CodeBlocker.Templates` — `SourceFileTemplate`, `ClassTemplate`, `FieldTemplate`, `MethodTemplate` and friends. The model owns punctuation, spacing, member ordering and indentation, so a `BodyFactory` writes only the body: `=> Create(value);` for an expression body, or a braced block. Do **not** prefix it with a space; the model supplies the separator.
 - A type's declaration keyword comes from `ClassTemplate.Kind` (`TypeKind.Class`, `TypeKind.Record`, …), not from `Keywords`, which carries only modifiers. Collection properties are read-only, so use collection-initializer syntax (`Keywords = { "public" }`) rather than assignment, or the `WithComments`/`WithInterfaces` helpers when you already hold a sequence.
 - Edit `Semantics.SourceGenerators/Metadata/dimensions.json` to add a dimension, vector form, semantic overload, or relationship.

Directory.Packages.props

@@ -15,6 +15,8 @@
     <PackageVersion Include="System.Numerics.Vectors" Version="4.6.1" />
     <!-- Source generator packages -->
     <PackageVersion Include="ktsu.CodeBlocker" Version="2.0.4" />
+    <PackageVersion Include="ktsu.SourceGeneratorToolkit" Version="1.0.0" />
+    <PackageVersion Include="ktsu.SourceGeneratorToolkit.Testing" Version="1.0.0" />
     <PackageVersion Include="Microsoft.CodeAnalysis.CSharp" Version="5.9.0" />
     <PackageVersion Include="Microsoft.CodeAnalysis.Analyzers" Version="5.9.0" />
     <!-- Build-time only: the generator reads its metadata with it. No shipping project