T4: SPECTRE & SHACHI Patterns

Scope

• Files: workspace/SPECTRE/SHACHI_INTERFACE_SPECS.md, SHACHI_PROBE_PLAN.md, SHACHI_SDK_PRESCRIPTION.md; workspace/SHACHI-patterns/INDEX.md; workspace/shachi/include/shachi/{vmu,sh4math,assets,profiler,material}.h (9 files)
• Purpose: The SPECTRE specifications define 8 game-facing Shachi SDK APIs (VMU, SH4 Math, Assets, Materials, Compositor, Tasks, Asset Manager, Profiler) built on KOS for Dreamcast. The SDK prescription provides an architecture roadmap. SHACHI-PROBE is a PVR2 divergence test ROM. The pattern encyclopedia catalogs cross-platform Dreamcast development patterns derived from commercial games (D2/Warp). The C headers are the actual Shachi SDK API implementations.

File Map