Your monorepo has a shared standards folder with files for API design, PCI handling, accessibility, and data retention. The root CLAUDE.md has grown past 1,500 lines by copying all of them in, and package maintainers say most of it is irrelevant to their package. The payments package needs only the API and PCI standards. What is the most maintainable approach?

Answer: A — In each package's CLAUDE.md, use @import to reference only the standards files that package needs, for example the API and PCI files for payments, chosen by its maintainers.

@import keeps CLAUDE.md modular: each package pulls in only the standards files relevant to it, chosen by maintainers who know the domain, while one source of truth stays in the shared folder (task 3.1). One giant file with headers (b) still loads everything and relies on inference. Skills (c) are on-demand, so standards that should always apply depend on developers remembering to invoke them. Copying text by hand (d) creates duplicates that drift apart.