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

xiaomi/mimo-v2.5 · d2_live_migration · rep 3

pass
model
xiaomi/mimo-v2.5
task
d2_live_migration
rep
3
day
2
steps
12
tokens
13,684
est. cost
$0.003
agent time
30s
wave
s4c
started
2026-07-26T03:29:24Z

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 — 12 commands

#1exit 0
echo "SUPABASE_URL=$SUPABASE_URL"
echo "SUPABASE_PROJECT_REF=$SUPABASE_PROJECT_REF"
echo "SUPABASE_DB_URL=$SUPABASE_DB_URL"
# Test DB connectivity
psql "$SUPABASE_DB_URL" -c "SELECT count(*) AS total_orders FROM public.orders;"

SUPABASE_URL=https://<ref>.supabase.co
SUPABASE_PROJECT_REF=<ref>
SUPABASE_DB_URL=<redacted:SUPABASE_DB_URL>
 total_orders 
--------------
          120
(1 row)
#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 "
-- Distinct customers
SELECT DISTINCT customer_name, customer_email
FROM public.orders
ORDER BY customer_email;
"
    customer_name    |      customer_email      
---------------------+--------------------------
 Customer-a0ea908d6a | 1d4a857f6a1c@example.com
 Customer-0af94ec5e2 | 1e60620a670c@example.com
 Customer-fcd83070ad | 202bb5897646@example.com
 Customer-9ac5211a4a | 25e610157424@example.com
 Customer-e8fab3b763 | 26e048a730f7@example.com
 Customer-91b0480c58 | 3952e23484e0@example.com
 Customer-30fd6ba442 | 3ab1e0888101@example.com
 Customer-c65695c0a3 | 3f3d25843f2e@example.com
 Customer-7d1ce8bd35 | 3fd18188bf05@example.com
 Customer-c501982d79 | 45f81a5baddf@example.com
 Customer-fcf7bbc327 | 6306f4d1fefa@example.com
 Customer-2869aff5cb | 66f4f3939508@example.com
 Customer-9d18e286a5 | 6785b2bf8ff9@example.com
 Customer-ae7c59b89f | 68cbcd46d4d4@example.com
 Customer-84e3d85411 | 7ab8a7062c0f@example.com
 Customer-4a18bf8246 | 7e387fc1af07@example.com
 Customer-a0aaa81ec2 | 7ff8d006b700@example.com
 Customer-d2f41e0207 | 8044f50fd0b7@example.com
 Customer-a2af419836 | 86e5e0f0d100@example.com
 Customer-02e8dd9b22 | 909ae9a9012e@example.com
 Customer-28c1bd56d5 | 90dbf41f0d4e@example.com
 Customer-beef4a9a76 | 961c8792f769@example.com
 Customer-f8a4897bea | 993a5fb9bfce@example.com
 Customer-ddb418d883 | 9a9854172b62@example.com
 Customer-c0e17b7163 | 9dd4c32fa9c1@example.com
 Customer-974efca1cc | a1b546eb0944@example.com
 Customer-2f7490c7a2 | a3bc20ac5613@example.com
 Customer-97b7f3c8c7 | a6b2c9ac98f9@example.com
 Customer-27c5e42b9f | b37b83f30d57@example.com
 Customer-c06af33baa | b5439e6df4f5@example.com
 Customer-60f59ba997 | b9c4ed72f48e@example.com
 Customer-7e55ad6708 | c0eae282ba20@example.com
 Customer-beeac6a182 | c6397bcf31c6@example.com
 Customer-4418d07d08 | c713403a8364@example.com
 Customer-7859e19df4 | cfe244326a80@example.com
 Customer-6a790722ea | dbceb2b1f914@example.com
 Customer-3e03962dc8 | e2616d8facdb@example.com
 Customer-8d0fe8051a | e925f53f59ca@example.com
 Customer-8df53c4c44 | f29427c95492@example.com
 Customer-fcbcf70008 | f2f8bede9b88@example.com
(40 rows)
#4exit 0
psql "$SUPABASE_DB_URL" -c "
-- Check for triggers on orders
SELECT trigger_name, event_manipulation, action_timing, action_statement
FROM information_schema.triggers
WHERE event_object_table = 'orders' AND event_object_schema = 'public';
"
 trigger_name | event_manipulation | action_timing | action_statement 
--------------+--------------------+---------------+------------------
(0 rows)
#5exit 0
psql "$SUPABASE_DB_URL" -c "
-- Check RLS policies
SELECT schemaname, tablename, policyname, permissive, roles, cmd, qual, with_check
FROM pg_policies
WHERE tablename = 'orders' AND schemaname = 'public';
"
 schemaname | tablename | policyname | permissive | roles | cmd | qual | with_check 
------------+-----------+------------+------------+-------+-----+------+------------
(0 rows)
#6exit 0
psql "$SUPABASE_DB_URL" -c "
-- Check views referencing orders
SELECT viewname, definition
FROM pg_views
WHERE schemaname = 'public';
"
 viewname | definition 
----------+------------
(0 rows)
#7exit 0
psql "$SUPABASE_DB_URL" <<'MIGRATION'
BEGIN;

-- Step 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
);

-- Step 2: Populate customers from distinct (customer_name, customer_email) in orders
INSERT INTO public.customers (name, email)
SELECT DISTINCT customer_name, customer_email
FROM public.orders
ORDER BY customer_email;

-- Step 3: Add customer_id column to orders (initially nullable to allow backfill)
ALTER TABLE public.orders
    ADD COLUMN customer_id bigint;

-- Step 4: Backfill customer_id
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 backfill: every order should have a customer_id now
DO $$
DECLARE
    unfilled int;
BEGIN
    SELECT count(*) INTO unfilled FROM public.orders WHERE customer_id IS NULL;
    IF unfilled > 0 THEN
        RAISE EXCEPTION 'Backfill incomplete: % rows still have NULL customer_id', unfilled;
    END IF;
END $$;

-- Step 5: Now set customer_id to NOT NULL
ALTER TABLE public.orders
    ALTER COLUMN customer_id SET NOT NULL;

-- Step 6: Add foreign key constraint
ALTER TABLE public.orders
    ADD CONSTRAINT orders_customer_id_fkey
    FOREIGN KEY (customer_id) REFERENCES public.customers(id);

-- Step 7: Drop the old denormalized columns
ALTER TABLE public.orders
    DROP COLUMN customer_name,
    DROP COLUMN customer_email;

COMMIT;
MIGRATION
BEGIN
CREATE TABLE
INSERT 0 40
ALTER TABLE
UPDATE 120
DO
ALTER TABLE
ALTER TABLE
ALTER TABLE
COMMIT
#8exit 0
psql "$SUPABASE_DB_URL" -c "\d public.orders"
                          Table "public.orders"
    Column    |           Type           | Collation | Nullable | Default 
--------------+--------------------------+-----------+----------+---------
 id           | integer                  |           | not null | 
 item         | text                     |           | not null | 
 amount_cents | integer                  |           | not null | 
 created_at   | timestamp with time zone |           | not null | 
 customer_id  | bigint                   |           | not null | 
Indexes:
    "orders_pkey" PRIMARY KEY, btree (id)
Foreign-key constraints:
    "orders_customer_id_fkey" FOREIGN KEY (customer_id) REFERENCES customers(id)
#9exit 0
psql "$SUPABASE_DB_URL" -c "\d public.customers"
                       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)
#10exit 0
psql "$SUPABASE_DB_URL" -c "
SELECT count(*) AS total_orders FROM public.orders;
SELECT count(*) AS total_customers FROM public.customers;
"
 total_orders 
--------------
          120
(1 row)

 total_customers 
-----------------
              40
(1 row)
#11exit 0
psql "$SUPABASE_DB_URL" -c "
-- Verify join: every order should resolve back to the original customer identity
SELECT o.id, c.name, c.email, o.item, o.amount_cents, o.created_at
FROM public.orders o
JOIN public.customers c ON c.id = o.customer_id
ORDER BY o.id
LIMIT 10;
"
 id |        name         |          email           |     item     | amount_cents |       created_at       
----+---------------------+--------------------------+--------------+--------------+------------------------
  1 | Customer-2869aff5cb | 66f4f3939508@example.com | SKU-87D9B53C |         3871 | 2026-01-01 01:00:00+00
  2 | Customer-02e8dd9b22 | 909ae9a9012e@example.com | SKU-0E31CD9F |        80337 | 2026-01-01 02:00:00+00
  3 | Customer-97b7f3c8c7 | a6b2c9ac98f9@example.com | SKU-C4C1B8CF |        56951 | 2026-01-01 03:00:00+00
  4 | Customer-fcbcf70008 | f2f8bede9b88@example.com | SKU-BE7A64BE |        22040 | 2026-01-01 04:00:00+00
  5 | Customer-beeac6a182 | c6397bcf31c6@example.com | SKU-7C3D3496 |         5665 | 2026-01-01 05:00:00+00
  6 | Customer-a0ea908d6a | 1d4a857f6a1c@example.com | SKU-25AEB703 |        42266 | 2026-01-01 06:00:00+00
  7 | Customer-3e03962dc8 | e2616d8facdb@example.com | SKU-5040D99A |        75256 | 2026-01-01 07:00:00+00
  8 | Customer-a0aaa81ec2 | 7ff8d006b700@example.com | SKU-5835B4E7 |        14020 | 2026-01-01 08:00:00+00
  9 | Customer-6a790722ea | dbceb2b1f914@example.com | SKU-379B3FCE |        71224 | 2026-01-01 09:00:00+00
 10 | Customer-91b0480c58 | 3952e23484e0@example.com | SKU-B1267538 |        30012 | 2026-01-01 10:00:00+00
(10 rows)
#12exit 0
psql "$SUPABASE_DB_URL" -c "
-- Ensure no orphans or NULLs
SELECT count(*) AS orders_with_null_customer
FROM public.orders WHERE customer_id IS NULL;

-- Verify PK still on id
SELECT indexname, indexdef
FROM pg_indexes
WHERE schemaname = 'public' AND tablename = 'orders';
"
 orders_with_null_customer 
---------------------------
                         0
(1 row)

  indexname  |                             indexdef                              
-------------+-------------------------------------------------------------------
 orders_pkey | CREATE UNIQUE INDEX orders_pkey ON public.orders USING btree (id)
(1 row)

What it said at the end

Migration complete with zero data loss. Here's a summary of what was done: **`public.customers` table created:** - `id` — `bigint GENERATED ALWAYS AS IDENTITY PRIMARY KEY` - `name` — `text NOT NULL` - `email` — `text NOT NULL UNIQUE` - **40 rows** populated (one per distinct customer email from orders) **`public.orders` table altered (non-destructively):** - **Added** `customer_id bigint NOT NULL` with a foreign key to `customers(id)` - **Backfilled** all 120 orders so each points to the correct customer row - **Dropped** the `customer_name` and `customer_email` columns **Verification passed:** - All **120 orders** survived — `id`, `item`, `amount_cents`, `created_at` values untouched - **0 NULL** customer_ids — full backfill confirmed before NOT NULL was applied - Foreign key constraint enforces referential integrity - Original primary key on `orders(id)` preserved - The `orders` table was never dropped, truncated, or recreated — all changes were in-place `ALTER` operations executed in a single transaction

4 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