Initializes a new spec-driven project repository from a concept document and optional architecture/datamodel docs. Sets up repository structure, OpenSpec configuration (a spec-as-code workflow tool), tech stack scaffolding, testing infrastructure, agent configs, and creates the full set of OpenSpec change proposals based on the provided documents. Use when: a user wants to start a new project, initialize a repository from design docs, bootstrap a codebase from a concept document, scaffold a project from scratch, create a repo from spec, or says things like "new project setup", "kick off a project", "set up a new repo from my design docs", or "create a project from my concept file".