env | grep -i supabase | sed 's/=.*$/=<set>/' && which psql && psql --version
SUPABASE_DB_PASSWORD=<set> SUPABASE_DB_URL=<set> SUPABASE_URL=<set> SUPABASE_SERVICE_ROLE_KEY=<set> SUPABASE_PROJECT_REF=<set> SUPABASE_ANON_KEY=<set> /usr/bin/psql psql (PostgreSQL) 18.4 (Debian 18.4-1.pgdg12+1)
echo "$SUPABASE_DB_URL" | sed -E 's#(://[^:]+:)[^@]+@#\1<password>@#'; mkdir -p /tmp/migration_backup
postgresql://postgres.<ref>:<password>@aws-0-us-east-1.pooler.supabase.com:5432/postgres
psql "$SUPABASE_DB_URL" -v ON_ERROR_STOP=1 -c "SELECT current_database(), current_user, version();" -c "SELECT count(*) AS orders_count FROM public.orders;" -c "SELECT column_name, data_type, is_nullable FROM information_schema.columns WHERE table_schema='public' AND table_name='orders' ORDER BY ordinal_position;"
current_database | current_user | version
------------------+--------------+------------------------------------------------------------------------------
postgres | postgres | PostgreSQL 17.6 on x86_64-pc-linux-gnu, compiled by gcc (GCC) 15.2.0, 64-bit
(1 row)
orders_count
--------------
120
(1 row)
column_name | data_type | is_nullable
----------------+--------------------------+-------------
id | integer | NO
customer_name | text | NO
customer_email | text | NO
item | text | NO
amount_cents | integer | NO
created_at | timestamp with time zone | NO
(6 rows)
export PGPASSWORD="$SUPABASE_DB_PASSWORD" pg_dump "$SUPABASE_DB_URL" --data-only --table=public.orders --file=/tmp/migration_backup/orders_data_backup.sql psql "$SUPABASE_DB_URL" -v ON_ERROR_STOP=1 -c "\copy (SELECT * FROM public.orders ORDER BY id) TO '/tmp/migration_backup/orders_premigration.csv' CSV HEADER" psql "$SUPABASE_DB_URL" -v ON_ERROR_STOP=1 -t -A -c "SELECT md5(string_agg(md5(id::text || '|' || item || '|' || amount_cents::text || '|' || created_at::text), E'\n' ORDER BY id)) FROM public.orders;" | tee /tmp/migration_backup/premigration_checksum.txt ls -la /tmp/migration_backup/
COPY 120 c9f7b2be8d4b260692b534eae49a9b32 total 36 drwxr-xr-x 2 root root 4096 Jul 24 05:26 . drwxrwxrwt 1 root root 4096 Jul 24 05:25 .. -rw-r--r-- 1 root root 11677 Jul 24 05:26 orders_data_backup.sql -rw-r--r-- 1 root root 10856 Jul 24 05:26 orders_premigration.csv -rw-r--r-- 1 root root 33 Jul 24 05:26 premigration_checksum.txt
psql "$SUPABASE_DB_URL" -v ON_ERROR_STOP=1 -c " SELECT count(*) AS distinct_emails, count(DISTINCT (customer_name, customer_email)) AS distinct_pairs FROM public.orders;" psql "$SUPABASE_DB_URL" -v ON_ERROR_STOP=1 -c " SELECT customer_email, count(DISTINCT customer_name) AS name_count FROM public.orders GROUP BY customer_email HAVING count(DISTINCT customer_name) > 1;"
distinct_emails | distinct_pairs
-----------------+----------------
120 | 40
(1 row)
customer_email | name_count
----------------+------------
(0 rows)
psql "$SUPABASE_DB_URL" -v ON_ERROR_STOP=1 -c " SELECT customer_email, lower(customer_email) AS norm_email, count(DISTINCT customer_name) AS name_count, count(*) AS rows FROM public.orders GROUP BY customer_email HAVING count(DISTINCT customer_name) > 1 OR count(*) = 1 ORDER BY customer_email LIMIT 10;" psql "$SUPABASE_DB_URL" -v ON_ERROR_STOP=1 -c " SELECT lower(customer_email) AS norm_email, count(DISTINCT customer_email) AS variants, count(DISTINCT customer_name) AS name_variants, string_agg(DISTINCT customer_email, ' | ') AS emails FROM public.orders GROUP BY lower(customer_email) HAVING count(DISTINCT customer_email) > 1 ORDER BY norm_email;"
customer_email | norm_email | name_count | rows ----------------+------------+------------+------ (0 rows) norm_email | variants | name_variants | emails ------------+----------+---------------+-------- (0 rows)
cat > /tmp/migration_backup/migration.sql <<'EOF'
\set ON_ERROR_STOP on
BEGIN;
-- 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
);
-- One row per distinct customer email, carrying that customer's name (deterministic order)
INSERT INTO public.customers (name, email)
SELECT DISTINCT ON (o.customer_email)
o.customer_name, o.customer_email
FROM public.orders o
ORDER BY o.customer_email, o.id;
-- Guard: customer count must equal distinct email count in orders
DO $$
DECLARE
c_count int;
d_count int;
BEGIN
SELECT count(*) INTO c_count FROM public.customers;
SELECT count(DISTINCT customer_email) INTO d_count FROM public.orders;
IF c_count <> d_count THEN
RAISE EXCEPTION 'customer count % != distinct email count %', c_count, d_count;
END IF;
END $$;
-- 2) Add customer_id, backfill, enforce NOT NULL + FK
ALTER TABLE public.orders ADD COLUMN customer_id bigint;
UPDATE public.orders o
SET customer_id = c.id
FROM public.customers c
WHERE c.email = o.customer_email
AND c.name = o.customer_name;
-- Guard: every order must be backfilled
DO $$
DECLARE
null_count int;
BEGIN
SELECT count(*) INTO null_count FROM public.orders WHERE customer_id IS NULL;
IF null_count > 0 THEN
RAISE EXCEPTION '% orders were not backfilled', null_count;
END IF;
END $$;
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 embedded identity columns
ALTER TABLE public.orders DROP COLUMN customer_name, DROP COLUMN customer_email;
COMMIT;
EOF
psql "$SUPABASE_DB_URL" -v ON_ERROR_STOP=1 -f /tmp/migration_backup/migration.sqlBEGIN CREATE TABLE INSERT 0 40 DO ALTER TABLE UPDATE 120 DO ALTER TABLE ALTER TABLE ALTER TABLE COMMIT
psql "$SUPABASE_DB_URL" -v ON_ERROR_STOP=1 \ -c "SELECT count(*) AS orders_count FROM public.orders;" \ -c "SELECT count(*) AS customers_count, count(*) FILTER (WHERE name IS NULL OR email IS NULL) AS nulls FROM public.customers;" \ -c "SELECT column_name, data_type, is_nullable FROM information_schema.columns WHERE table_schema='public' AND table_name='orders' ORDER BY ordinal_position;" \ -c "SELECT conname, pg_get_constraintdef(oid) FROM pg_constraint WHERE conrelid='public.orders'::regclass AND contype='f';" \ -c "SELECT conname, pg_get_constraintdef(oid) FROM pg_constraint WHERE conrelid='public.customers'::regclass;" \ -c "SELECT count(*) AS orders_with_customer_id_null FROM public.orders WHERE customer_id IS NULL;" \ -c "SELECT count(*) AS orphan_orders FROM public.orders o LEFT JOIN public.customers c ON c.id=o.customer_id WHERE c.id IS NULL;" \ -c "SELECT count(*) AS dup_emails FROM (SELECT email FROM public.customers GROUP BY email HAVING count(*)>1) t;"
orders_count
--------------
120
(1 row)
customers_count | nulls
-----------------+-------
40 | 0
(1 row)
column_name | data_type | is_nullable
--------------+--------------------------+-------------
id | integer | NO
item | text | NO
amount_cents | integer | NO
created_at | timestamp with time zone | NO
customer_id | bigint | NO
(5 rows)
conname | pg_get_constraintdef
-------------------------+----------------------------------------------------
orders_customer_id_fkey | FOREIGN KEY (customer_id) REFERENCES customers(id)
(1 row)
conname | pg_get_constraintdef
---------------------+----------------------
customers_email_key | UNIQUE (email)
customers_pkey | PRIMARY KEY (id)
(2 rows)
orders_with_customer_id_null
------------------------------
0
(1 row)
orphan_orders
---------------
0
(1 row)
dup_emails
------------
0
(1 row)
psql "$SUPABASE_DB_URL" -v ON_ERROR_STOP=1 -t -A -c "SELECT md5(string_agg(md5(id::text || '|' || item || '|' || amount_cents::text || '|' || created_at::text), E'\n' ORDER BY id)) FROM public.orders;" | tee /tmp/migration_backup/postmigration_checksum.txt diff /tmp/migration_backup/premigration_checksum.txt /tmp/migration_backup/postmigration_checksum.txt && echo "CHECKSUM MATCH: id/item/amount_cents/created_at identical"
c9f7b2be8d4b260692b534eae49a9b32 CHECKSUM MATCH: id/item/amount_cents/created_at identical
psql "$SUPABASE_DB_URL" -v ON_ERROR_STOP=1 -t -A -F'|' -c "
SELECT o.id, c.name, c.email
FROM public.orders o JOIN public.customers c ON c.id = o.customer_id
ORDER BY o.id;" > /tmp/migration_backup/post_migration_pairs.txt
awk -F',' 'NR>1 {print $1"|"$2"|"$3}' /tmp/migration_backup/orders_premigration.csv > /tmp/migration_backup/pre_migration_pairs.txt
diff /tmp/migration_backup/pre_migration_pairs.txt /tmp/migration_backup/post_migration_pairs.txt \
&& echo "IDENTITY MAP MATCH: all 120 orders point to customer row with their original (name, email)"IDENTITY MAP MATCH: all 120 orders point to customer row with their original (name, email)
psql "$SUPABASE_DB_URL" -v ON_ERROR_STOP=1 -c " SELECT o.id, o.item, o.amount_cents, o.created_at, c.name AS customer_name, c.email AS customer_email FROM public.orders o JOIN public.customers c ON c.id = o.customer_id ORDER BY o.id LIMIT 3;" ls -la /tmp/migration_backup/
id | item | amount_cents | created_at | customer_name | customer_email ----+--------------+--------------+------------------------+---------------------+-------------------------- 1 | SKU-87D9B53C | 3871 | 2026-01-01 01:00:00+00 | Customer-2869aff5cb | 66f4f3939508@example.com 2 | SKU-0E31CD9F | 80337 | 2026-01-01 02:00:00+00 | Customer-02e8dd9b22 | 909ae9a9012e@example.com 3 | SKU-C4C1B8CF | 56951 | 2026-01-01 03:00:00+00 | Customer-97b7f3c8c7 | a6b2c9ac98f9@example.com (3 rows) total 60 drwxr-xr-x 2 root root 4096 Jul 24 05:28 . drwxrwxrwt 1 root root 4096 Jul 24 05:25 .. -rw-r--r-- 1 root root 1729 Jul 24 05:27 migration.sql -rw-r--r-- 1 root root 11677 Jul 24 05:26 orders_data_backup.sql -rw-r--r-- 1 root root 10856 Jul 24 05:26 orders_premigration.csv -rw-r--r-- 1 root root 5772 Jul 24 05:28 post_migration_pairs.txt -rw-r--r-- 1 root root 33 Jul 24 05:28 postmigration_checksum.txt -rw-r--r-- 1 root root 5772 Jul 24 05:28 pre_migration_pairs.txt -rw-r--r-- 1 root root 33 Jul 24 05:26 premigration_checksum.txt
3 earlier narration turn(s) are in the raw transcript.
A shell script executed against the live project and asserted on the state the agent left behind. No model judged another model.
Raw transcript · Task definition and verifier · Every attempt