diff --git a/README.md b/README.md
index 1fe376c..22b7c63 100644
--- a/README.md
+++ b/README.md
@@ -37,8 +37,12 @@ runs the BullMQ worker (jobs/worker.ts) once Phase 4 makes it do anything.
 
 ## Status
 
-Phase 0 (scaffold & CI), Phase 1 (core data model & admin CRUD), and Phase 2
-(scheduling engine — `app/lib/time.ts`, `app/services/scheduling.server.ts`,
-`app/services/capacity.server.ts`) are complete. See §6 of
+Phase 0 (scaffold & CI), Phase 1 (core data model & admin CRUD), Phase 2
+(scheduling engine), and Phase 3 (storefront widget + cart attributes —
+`extensions/datetime-widget/`) are complete. See §6 of
 `IMPLEMENTATION_PLAN.md` for the phased build order and acceptance criteria
-— next up is Phase 3 (storefront widget + cart attributes).
+— next up is Phase 4 (enforcement Functions + slot-holds).
+
+Editing the storefront widget's `extensions/datetime-widget/src/`? Run
+`npm run build:widget` to rebuild `assets/datetime-widget.js` — it also runs
+automatically before `npm run dev` / `npm run deploy`.