Sequencing modernization when design still ships weekly

Modernization projects lose credibility when they ask designers to freeze screens for a quarter. We map strangler seams against the design calendar, not the other way around. If a seam crosses an active surface, we split the extraction into invisible plumbing first.

Feature flags become negotiation tools. Instead of hiding unfinished work forever, we time-box flag lifetimes and attach owners. That discipline keeps flags from becoming a shadow backlog.

The last mile is communication. We publish a single roadmap artifact that lists what customers will notice, what they will not, and which internal reviewers signed off. That clarity keeps external reviewers from imagining secret rewrites.