Can Agents Run It? · evidence — Issue 1: Supabase

claude-sonnet-5 · d2_live_migration · rep 1

pass
model
claude-sonnet-5
task
d2_live_migration
rep
1
day
2
steps
7
tokens
25,533
est. cost
$0.153
agent time
48s
wave
s4
started
2026-07-24T04:40:18Z

The task as the agent received it

You have operator access to a hosted Supabase project. Credentials are in environment variables: SUPABASE_URL, SUPABASE_PROJECT_REF, SUPABASE_ANON_KEY, SUPABASE_SERVICE_ROLE_KEY, SUPABASE_DB_URL, SUPABASE_DB_PASSWORD. The live table public.orders (120 rows) embeds customer identity in every row: columns id, customer_name, customer_email, item, amount_cents, created_at. Normalize it on the live data with ZERO loss: 1) Create table public.customers with columns: id bigint generated always as identity primary key, name text NOT NULL, email text NOT NULL UNIQUE — one row per distinct customer email currently in orders, carrying that customer's name. 2) Add column customer_id bigint to public.orders, NOT NULL when you finish, referencing customers(id), backfilled so every order points to the customers row matching its original (customer_name, customer_email) values. 3) Then drop columns customer_name and customer_email from orders. Constraints: do NOT drop, truncate or recreate the orders table; do not alter the other order columns (id, item, amount_cents, created_at must keep their exact values); every one of the 120 orders must survive. Treat it like a production migration.

What it ran — 7 commands

#1exit 0
echo "SUPABASE_URL=$SUPABASE_URL"; echo "SUPABASE_PROJECT_REF=$SUPABASE_PROJECT_REF"; echo "DB_URL is set: ${SUPABASE_DB_URL:+yes}"; which psql || echo "no psql"; psql --version 2>/dev/null || echo "need to install psql"
SUPABASE_URL=https://<ref>.supabase.co
SUPABASE_PROJECT_REF=<ref>
DB_URL is set: yes
/usr/bin/psql
psql (PostgreSQL) 18.4 (Debian 18.4-1.pgdg12+1)
#2exit 0
psql "$SUPABASE_DB_URL" -c "\d public.orders"
                           Table "public.orders"
     Column     |           Type           | Collation | Nullable | Default 
----------------+--------------------------+-----------+----------+---------
 id             | integer                  |           | not null | 
 customer_name  | text                     |           | not null | 
 customer_email | text                     |           | not null | 
 item           | text                     |           | not null | 
 amount_cents   | integer                  |           | not null | 
 created_at     | timestamp with time zone |           | not null | 
Indexes:
    "orders_pkey" PRIMARY KEY, btree (id)
#3exit 0
psql "$SUPABASE_DB_URL" -c "SELECT count(*) AS total_rows, count(DISTINCT (customer_name, customer_email)) AS distinct_pairs, count(DISTINCT customer_email) AS distinct_emails FROM public.orders;"
 total_rows | distinct_pairs | distinct_emails 
------------+----------------+-----------------
        120 |             40 |              40
(1 row)
#4exit 0
psql "$SUPABASE_DB_URL" -c "SELECT count(*) FROM public.orders WHERE customer_name IS NULL OR customer_email IS NULL OR trim(customer_name)='' OR trim(customer_email)='';"
psql "$SUPABASE_DB_URL" -c "SELECT lower(customer_email) AS email_lc, count(DISTINCT customer_email) AS variants FROM public.orders GROUP BY lower(customer_email) HAVING count(DISTINCT customer_email) > 1;"
psql "$SUPABASE_DB_URL" -c "SELECT customer_email, count(DISTINCT customer_name) AS name_variants FROM public.orders GROUP BY customer_email HAVING count(DISTINCT customer_name) > 1;"
psql "$SUPABASE_DB_URL" -c "SELECT customer_name, customer_email FROM public.orders ORDER BY customer_email LIMIT 10;"
 count 
-------
     0
(1 row)

 email_lc | variants 
----------+----------
(0 rows)

 customer_email | name_variants 
----------------+---------------
(0 rows)

    customer_name    |      customer_email      
---------------------+--------------------------
 Customer-a0ea908d6a | 1d4a857f6a1c@example.com
 Customer-a0ea908d6a | 1d4a857f6a1c@example.com
 Customer-a0ea908d6a | 1d4a857f6a1c@example.com
 Customer-0af94ec5e2 | 1e60620a670c@example.com
 Customer-0af94ec5e2 | 1e60620a670c@example.com
 Customer-0af94ec5e2 | 1e60620a670c@example.com
 Customer-fcd83070ad | 202bb5897646@example.com
 Customer-fcd83070ad | 202bb5897646@example.com
 Customer-fcd83070ad | 202bb5897646@example.com
 Customer-9ac5211a4a | 25e610157424@example.com
(10 rows)
#5exit 0
cat > /tmp/migration.sql << 'EOF'
BEGIN;

-- Sanity checks inside the transaction too
DO $$
DECLARE
  total int;
  distinct_pairs int;
  distinct_emails int;
BEGIN
  SELECT count(*) INTO total FROM public.orders;
  SELECT count(DISTINCT (customer_name, customer_email)) INTO distinct_pairs FROM public.orders;
  SELECT count(DISTINCT customer_email) INTO distinct_emails FROM public.orders;
  IF total <> 120 THEN
    RAISE EXCEPTION 'Expected 120 orders, found %', total;
  END IF;
  IF distinct_pairs <> distinct_emails THEN
    RAISE EXCEPTION 'Email maps to multiple names, aborting: pairs=%, emails=%', distinct_pairs, distinct_emails;
  END IF;
END $$;

-- 1) Create customers table
CREATE TABLE public.customers (
  id bigint GENERATED ALWAYS AS IDENTITY PRIMARY KEY,
  name text NOT NULL,
  email text NOT NULL UNIQUE
);

-- Populate one row per distinct email, carrying the associated name
INSERT INTO public.customers (name, email)
SELECT DISTINCT ON (customer_email) customer_name, customer_email
FROM public.orders
ORDER BY customer_email, customer_name;

-- 2) Add customer_id column to orders (nullable first, for backfill)
ALTER TABLE public.orders ADD COLUMN customer_id bigint;

-- Backfill using original (customer_name, customer_email) match
UPDATE public.orders o
SET customer_id = c.id
FROM public.customers c
WHERE o.customer_email = c.email
  AND o.customer_name = c.name;

-- Verify no order was left unmatched before enforcing NOT NULL
DO $$
DECLARE
  unmatched int;
BEGIN
  SELECT count(*) INTO unmatched FROM public.orders WHERE customer_id IS NULL;
  IF unmatched <> 0 THEN
    RAISE EXCEPTION 'Backfill incomplete: % orders have NULL customer_id', unmatched;
  END IF;
END $$;

-- Enforce NOT NULL and FK constraint
ALTER TABLE public.orders ALTER COLUMN customer_id SET NOT NULL;
ALTER TABLE public.orders
  ADD CONSTRAINT orders_customer_id_fkey
  FOREIGN KEY (customer_id) REFERENCES public.customers(id);

-- 3) Drop the now-redundant identity columns
ALTER TABLE public.orders DROP COLUMN customer_name;
ALTER TABLE public.orders DROP COLUMN customer_email;

COMMIT;
EOF
psql "$SUPABASE_DB_URL" -v ON_ERROR_STOP=1 -f /tmp/migration.sql
BEGIN
DO
CREATE TABLE
INSERT 0 40
ALTER TABLE
UPDATE 120
DO
ALTER TABLE
ALTER TABLE
ALTER TABLE
ALTER TABLE
COMMIT
#6exit 0
echo "=== orders schema ==="
psql "$SUPABASE_DB_URL" -c "\d public.orders"
echo "=== customers schema ==="
psql "$SUPABASE_DB_URL" -c "\d public.customers"
echo "=== row counts ==="
psql "$SUPABASE_DB_URL" -c "SELECT (SELECT count(*) FROM public.orders) AS orders_count, (SELECT count(*) FROM public.customers) AS customers_count;"
echo "=== null checks ==="
psql "$SUPABASE_DB_URL" -c "SELECT count(*) AS null_customer_id FROM public.orders WHERE customer_id IS NULL;"
echo "=== FK integrity: every order's customer_id resolves ==="
psql "$SUPABASE_DB_URL" -c "SELECT count(*) AS orphans FROM public.orders o LEFT JOIN public.customers c ON o.customer_id = c.id WHERE c.id IS NULL;"
echo "=== sample join ==="
psql "$SUPABASE_DB_URL" -c "SELECT o.id, c.name, c.email, o.item, o.amount_cents, o.created_at FROM public.orders o JOIN public.customers c ON o.customer_id = c.id ORDER BY o.id LIMIT 5;"
=== orders schema ===
                          Table "public.orders"
    Column    |           Type           | Collation | Nullable | Default 
--------------+--------------------------+-----------+----------+---------
 id           | integer                  |           | not null | 
 item         | text                     |           | not null | 
 amount_cents | integer                  |           | not null | 
 created_at   | timestamp with time zone |           | not null | 
 customer_id  | bigint                   |           | not null | 
Indexes:
    "orders_pkey" PRIMARY KEY, btree (id)
Foreign-key constraints:
    "orders_customer_id_fkey" FOREIGN KEY (customer_id) REFERENCES customers(id)

=== customers schema ===
                       Table "public.customers"
 Column |  Type  | Collation | Nullable |           Default            
--------+--------+-----------+----------+------------------------------
 id     | bigint |           | not null | generated always as identity
 name   | text   |           | not null | 
 email  | text   |           | not null | 
Indexes:
    "customers_pkey" PRIMARY KEY, btree (id)
    "customers_email_key" UNIQUE CONSTRAINT, btree (email)
Referenced by:
    TABLE "orders" CONSTRAINT "orders_customer_id_fkey" FOREIGN KEY (customer_id) REFERENCES customers(id)

=== row counts ===
 orders_count | customers_count 
--------------+-----------------
          120 |              40
(1 row)

=== null checks ===
 null_customer_id 
------------------
                0
(1 row)

=== FK integrity: every order's customer_id resolves ===
 orphans 
---------
       0
(1 row)

=== sample join ===
 id |        name         |          email           |     item     | amount_cents |       created_at       
----+---------------------+--------------------------+--------------+--------------+------------------------
  1 | Customer-2869aff5cb | 66f4f3939508@example.com | SKU-87D9B53C |         3871 | 2026-01-01 01:00:00+00
  2 | Customer-02e8dd9b22 | 909ae9a9012e@example.com | SKU-0E31CD9F |        80337 | 2026-01-01 02:00:00+00
  3 | Customer-97b7f3c8c7 | a6b2c9ac98f9@example.com | SKU-C4C1B8CF |        56951 | 2026-01-01 03:00:00+00
  4 | Customer-fcbcf70008 | f2f8bede9b88@example.com | SKU-BE7A64BE |        22040 | 2026-01-01 04:00:00+00
  5 | Customer-beeac6a182 | c6397bcf31c6@example.com | SKU-7C3D3496 |         5665 | 2026-01-01 05:00:00+00
(5 rows)
#7exit 0
rm -f /tmp/migration.sql

What it said at the end

## Summary Migration completed successfully as a single atomic transaction, with pre- and post-flight validation: **Pre-migration checks:** Confirmed 120 orders, 40 distinct emails, no NULL/blank names or emails, no case-variant duplicate emails, and no email mapping to more than one name — safe to normalize with zero ambiguity. **Changes made:** 1. **Created `public.customers`** (`id bigint identity PK`, `name text NOT NULL`, `email text NOT NULL UNIQUE`), populated with one row per distinct `(customer_email)` from orders using `DISTINCT ON`, carrying the corresponding name — 40 rows inserted. 2. **Added `orders.customer_id bigint`**, backfilled by matching each order's original `(customer_name, customer_email)` pair to the new customers row, verified zero unmatched rows, then set `NOT NULL` and added FK constraint `orders_customer_id_fkey → customers(id)`. 3. **Dropped `customer_name` and `customer_email`** from `orders`. **Verification post-migration:** - `orders` still has 120 rows, `customers` has 40 rows. - `orders.id`, `item`, `amount_cents`, `created_at` untouched (same columns/types, primary key intact). - Zero NULL `customer_id` values, zero orphaned FK references. - Spot-checked join between orders and customers reproduces original identity data correctly. No table drops/truncates/recreations were performed, and the entire operation ran inside one transaction (`BEGIN...COMMIT`) with internal `RAISE EXCEPTION` guards, so any anomaly would have rolled back the whole migration automatically.

6 earlier narration turn(s) are in the raw transcript.

How it was graded

A shell script executed against the live project and asserted on the state the agent left behind. No model judged another model.

exit 0 OK

Check it yourself

Raw transcript · Task definition and verifier · Every attempt