Coordinate Components Step 1 — Read AGENTS.md Read at the workspace root to learn the project's conventions before making changes. Step 2 — Decide the scope | Need | Mechanism | When to use | |------|-----------|-------------| | Subtree (same render mode) | component | Theme, layout config within a layout | | App-wide (all render modes) | via DI | Current user, feature flags, theme shared globally | | Mutable shared state within a circuit | Scoped service + event | Shopping cart, notification count, selected filters | For parent→child one level: use / (see skill). For persisting state across…