add-reference

References are loaded by design, build, and research commands and passed to their agents as additional context.

Input: User-provided files, URLs, or descriptions Output: {project}/references/ with organized reference files + references/INDEX.md

Scan .design/projects/ for project directories. If only one project exists, use it. If multiple, ask the user which project to work on.

Set PROJECT_PATH = .design/projects/{project}