Isolating a product with facade and contracts Use this skill to migrate an existing product to the isolated architecture used by Visual review. Keep migrations incremental, with narrow PRs that avoid broad breakage. Prerequisite: the product must already live under . This skill does not cover moving code out of , , or other shared directories — do that first. Core docs to load first Read these before changing code: 1. products/architecture.md 2. products/README.md 3. docs/internal/monorepo-layout.md 4. posthog/models/team/README.md (team extension model rule) 5. docs/published/handbook/engine…