scaffold

Reads project config and stack state, installs dependencies, creates config files, installs component library primitives, and verifies the build compiles. Produces SCAFFOLD-LOG.md.

Works two ways:

1. Standalone — user runs /gsp:scaffold directly to set up a project's stack
2. As a building block — /gsp:project-build invokes this as Phase 1 before spawning builder agents

Input: config.json, STACK.md, install-manifest.md Output: Working dev environment + {PROJECT_PATH}/build/SCAFFOLD-LOG.md Agent: None — all commands run inline