Nice addition — medallion architecture is a great story to tell, and the bronze→silver→gold layering with LOCAL VIEWS for silver and MATERIALIZED for gold is exactly the right shape. The demo prose at the top is well written and the INSERT INTO bronze_suppliers ... 10000 ... trick to flip gold_realtime_inventory_alerts is a clean way to make incrementality visible in milliseconds.

A few semantic things to fix before merging, plus some cosmetic items. None of them break the demo, but a couple of them make the metrics technically wrong, which is bad in a showcase.

Main issues

1. gold_inventory_risk.avg_daily_units is SUM(quantity) / 30.0 over all-time orders, not over the last 30 days. There's no date filter on the sales subquery — SUM(quantity) covers the entire history of silver_confirmed_order_items. Dividing by 30 is then meaningless: if the dataset has 90 days of history, the "average daily units" is 3× too high; if it has 10 days, 3× too low. Either filter to a recent window (WHERE order_created_at > NOW() - INTERVAL '30' DAY) or divide by the actual number of days observed (COUNT(DISTINCT DATE_TRUNC(order_created_at, DAY))). As written, the CRITICAL/WARNING/OK classification is calibrated against a fictitious denominator. Inline comment with details.

2. gold_supplier_performance groups on (supplier_name, supplier_country, lead_time_days) rather than on supplier_id. This is the only join key all the way down — orders_by_supplier / products_by_supplier / orders_count_by_supplier / silver_inventory_by_supplier all hang off it. Two different suppliers that happen to share a (name, country, lead_time) tuple will silently collapse into one row, and silver_inventory_by_supplier further only groups by supplier_name, which compounds it. Use supplier_id as the grain throughout and carry the descriptive columns along for display.

3. The connector story disagrees with the connector config. The header says "fed by a Delta snapshot connector and then kept current by the CDC stream", and several Gold-view comments reference "MERGE commits transition order statuses (the core incremental demo)". But every bronze_* table only has a single mode: snapshot delta_table_input connector — no follower CDC stream. After the initial snapshot the only way to see incrementality is the ad-hoc INSERT trick shown in the prose. Either drop the CDC language or add the CDC follower connector (mode: cdc / transaction_mode: cdc).

Smaller things

4. silver_orders_enriched inner-joins to the aggregated order_items subquery, so orders with zero qualifying line items disappear before reaching gold — including the cancelled-but-empty case. If that's intentional (only emit orders that actually have line items), worth a one-line comment; otherwise LEFT JOIN and COALESCE the aggregates.

5. silver_inventory_current.total_sold mixes two event types into one number: SUM(ABS(...)) WHERE event_type='sale_reserve' minus SUM(...) WHERE event_type='cancellation_restock'. The sign convention buried in quantity_change (sale_reserve presumably stored negative? cancellation_restock positive?) isn't documented anywhere in the SQL. Even one comment about the sign of quantity_change per event_type would save the next reader.

6. Formatting is inconsistent — first column of several CREATE TABLEs starts at column 0 (event_id, order_item_id, product_id, inventory_event_id) while later columns are indented 4 spaces; the 'skip_unused_columns'/'connectors' keys also drift between column 0 and indented. Running the file through a formatter would help. The two ORDER BYs in gold_weekly_revenue_trend and gold_cancellation_impact window specs sit at column 0 inside an already-indented OVER (...) clause — same fix.

7. The DDL has no WHERE filter on bronze_clickstream_events anywhere downstream — none of silver or gold references it. If it's there as future material for someone to demo from, fine; if it's leftover, drop it (it has the largest row count and the heaviest connector, so it costs the most to ingest).

8. Prose nit: "Append-and-update tables" in the bronze description, but the bronze tables are declared with PRIMARY KEY (so they're really upsert tables). "Append-only" in the inline comment a few lines down then contradicts the prose. Pick one.

Will be happy to re-approve once 1, 2, and 3 are addressed.