gsp-project-build

Works with the dual-diamond architecture: reads brand system from .design/branding/{brand}/patterns/ via brand.ref, reads/writes project assets in .design/projects/{project}/.

Pipeline architecture:

Phase 1: SCAFFOLD (skill-level, no agent)
  └─ /gsp-scaffold → verify build passes

Phase 2: FOUNDATIONS (agent: gsp-project-builder mode:foundations)
  ├─ Context: {brand-name}.yml + token-mapping.md, target-adaptations.md, STACK.md, CONVENTIONS.md
  ├─ Writes: token config, global CSS, layout, shared utils
  └─ CHECKPOINT: build must compile

Phase 3: FOUNDATION REVIEW (interactive)
  └─ Present summary → user confirms