diff --git a/AGENTS.md b/AGENTS.md
index ec1f513..6ce2411 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -2,7 +2,7 @@
 
 ## Project Structure & Module Organization
 - Root `README.md` describes the learning roadmap (RU).
-- `dwh-modeling/` contains the article and demo DWH model; SQL lives in `dwh-modeling/sql` as ordered scripts `01_...sql`–`06_...sql`.
+- `dwh-modeling/` contains the article and demo DWH model; SQL lives in `dwh-modeling/sql` as ordered scripts `01_...sql`–`09_...sql` (07–09 are homework DDL, template and solution).
 - `postgres-bookings/` is a Dockerized PostgreSQL + demo “bookings” DB; start it first, then apply DWH scripts against the `demo` database.
 
 ## Build, Test, and Development Commands
diff --git a/dwh-modeling/README.md b/dwh-modeling/README.md
index fa80267..a4d038e 100644
--- a/dwh-modeling/README.md
+++ b/dwh-modeling/README.md
@@ -180,7 +180,7 @@ flowchart TD
 |---------|------------|
 | `dds.dim_customer` | Измерение «Клиент» с историей (SCD Type 2) |
 | `dds.dim_product` | Измерение «Товар» |
-| `dds.dim_date` | Готовый календарь на 10 лет вперёд (день/неделя/месяц/квартал) |
+| `dds.dim_date` | Готовый календарь на 5 лет вперёд (день/неделя/месяц/квартал) |
 | `dds.fact_sales` | Факт «Продажа» — строка заказа с суммой и количеством |
 
 💡 **Суррогатный ключ (Surrogate Key, SK)** — это `BIGINT`, который мы генерируем сами (например, `customer_sk = 1001`).  
@@ -558,8 +558,8 @@ JOIN dds.dim_product p
   ON f.product_sk = p.product_sk
 JOIN dds.dim_customer c
   ON f.customer_sk = c.customer_sk
-  AND f.order_date >= c.valid_from
-  AND (c.valid_to IS NULL OR f.order_date < c.valid_to)  -- SCD!
+  AND d.date_actual >= c.valid_from
+  AND (c.valid_to IS NULL OR d.date_actual < c.valid_to)  -- SCD!
 GROUP BY d.date_actual, p.product_name, c.customer_segment;
 ```
 
diff --git a/dwh-modeling/sql/05_ddl_dm.sql b/dwh-modeling/sql/05_ddl_dm.sql
index 214bb46..4b02c46 100644
--- a/dwh-modeling/sql/05_ddl_dm.sql
+++ b/dwh-modeling/sql/05_ddl_dm.sql
@@ -21,7 +21,7 @@ CREATE TABLE dm.mart_customer_360 (
     customer_bk      INT NOT NULL,
     first_order_date DATE,
     last_order_date  DATE,
-    total_line_items     INT NOT NULL,
+    total_line_items INT NOT NULL,
     total_items      INT NOT NULL,
     lifetime_value   NUMERIC(18,2) NOT NULL,
     last_email       VARCHAR(100),
diff --git a/dwh-modeling/sql/09_dml_hw_customer_status_solution.sql b/dwh-modeling/sql/09_dml_hw_customer_status_solution.sql
index cf22a73..42686d8 100644
--- a/dwh-modeling/sql/09_dml_hw_customer_status_solution.sql
+++ b/dwh-modeling/sql/09_dml_hw_customer_status_solution.sql
@@ -147,6 +147,10 @@ SELECT * FROM dds.dim_customer_status ORDER BY customer_bk, valid_from;
 --   - клиент 104: новый клиент, статус new
 
 -- 3.0) Новые события в STG
+-- При повторном запуске эти строки добавятся в STG ещё раз (дубли).
+-- Для демо это не страшно: ODS-вставка ниже использует ON CONFLICT DO NOTHING,
+-- а SCD2-блок защищён от повторных вставок через NOT EXISTS.
+-- В продакшене STG обычно очищается перед каждой загрузкой (TRUNCATE / партиция по дате).
 INSERT INTO stg.customer_status_raw (customer_id, status, event_ts, _load_id, _load_ts) VALUES
 ('101','active','2024-11-15 09:00:00','batch_20241115_1000','2024-11-15 10:00:00'),
 ('102','active','2024-05-05 09:30:00','batch_20240505_1000','2024-05-05 10:00:00'),
@@ -305,7 +309,9 @@ TRUNCATE dm.mart_customer_status_daily;
 WITH bounds AS (
     SELECT
         min(valid_from)                                           AS date_from,
-        max(coalesce(valid_to, valid_from))                       AS date_to
+        -- CURRENT_DATE для открытых интервалов (valid_to IS NULL = текущий статус),
+        -- иначе витрина не покроет даты после последней смены статуса.
+        max(coalesce(valid_to, CURRENT_DATE))                     AS date_to
     FROM dds.dim_customer_status
 )
 INSERT INTO dm.mart_customer_status_daily (