I've got a technical issue that needs some outside help. My background is not tech so it's not something I'm confident giving Claude an answer to so I got it to ask the question and said I'd give it any responses I got. Here's what it asked... I help run a small street food business, and we've built our internal tools as an ICM workspace. It's been working well. I've hit a structural question I'd like your view on before we change anything. The setup One folder holds four tools side by side, each a full pipeline with its own CLAUDE.md: - PRODUCTION-RUN: weekly orders in; production sheet and courier/invoice files out - SALES-HISTORY: who's buying more or less, week to week - COST-CALCULATOR: labour and ingredient cost per product - STAFF-HOURS: hours, holiday, and the monthly payroll file to the accountant The top-level CLAUDE.md only routes to the right tool. There's no shared reference folder at the top level. Our rule versus the skill Our top-level CLAUDE.md says each tool "holds its own data, and points at nothing outside itself", and that "a pointer across folders is how a suite turns into a tangle." The icm-architect skill's Umbrella form is looser. Sub-pipelines "don't share state" except through the root reference layers, and shared reference material should be linked up rather than duplicated. What actually happens Two of our tools break our own rule on purpose: - SALES-HISTORY reads PRODUCTION-RUN's weekly production sheets and its customer list. It also keeps its own snapshot of customer prices, and its own copies of older hand-kept sheets. - COST-CALCULATOR reads the same weekly production sheets. In both, only the first stage reaches across, and only once. Every later stage is told not to load anything from PRODUCTION-RUN. STAFF-HOURS reads nothing outside itself. It only mentions PRODUCTION-RUN in its notes, as a comparison. Each tool runs a check at the start of every session that reports any file path it can't find inside its own folder. So every reference to another tool gets reported as broken, every session.