Epic: source-generated compiler SDK (phase 2) #4

Current State

Reflection-walking interpreters are too slow to be the only runtime for shipped products. Performance-critical domains need graphs compiled to C# by a Roslyn source generator. This is phase 2: the backend contract exists in the core now and the implementation follows the interpreter.

Tasks:

• Compile graphs to C# with a source-generated backend #19 Source-generated compiler backend
• Ship an analyzer package for custom nodes in user assemblies #20 Analyzer package for custom nodes in user assemblies

Acceptance Criteria:

• Generated artifacts implement ICompiledGraph and match interpreter results on all samples through the differential harness (Add a differential test harness comparing backends with the interpreter #18)
• User assemblies that define custom nodes compile with the shipped analyzer package
• Generated code is trimming- and AOT-safe

Related:

• Epic: MASS4.Graph core — headless model, identity, editing and persistence #1 (core), Epic: reference interpreter and differential test harness #3 (interpreter and differential harness)