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

moonshotai/kimi-k3 · d2_live_migration · rep 3

pass

model

moonshotai/kimi-k3

task

d2_live_migration

rep

day

steps

tokens

18,505

est. cost

$0.139

agent time

212s

wave

started

2026-07-24T05:31:07Z

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 — 8 commands

#1exit 0

env | grep -E '^SUPABASE_' | sed -E 's/(PASSWORD|KEY)=.{6}.*/\1=***redacted***/; s/(:\/\/[^:]+:)[^@]+@/\1***@/' ; which psql pg_dump || echo 'NO_PSQL'

SUPABASE_DB_PASSWORD=***redacted***
SUPABASE_DB_URL=postgresql://postgres.<ref>:***@aws-0-us-east-1.pooler.supabase.com:5432/postgres
SUPABASE_URL=https://<ref>.supabase.co
SUPABASE_SERVICE_ROLE_KEY=***redacted***
SUPABASE_PROJECT_REF=<ref>
SUPABASE_ANON_KEY=***redacted***
/usr/bin/psql
/usr/bin/pg_dump

#2exit 0

export PGPASSWORD="$SUPABASE_DB_PASSWORD"; psql "$SUPABASE_DB_URL" -v ON_ERROR_STOP=1 -c "\d public.orders" -c "SELECT count(*) AS total_rows, count(DISTINCT customer_email) AS distinct_emails, count(*) FILTER (WHERE customer_name IS NULL) AS null_names, count(*) FILTER (WHERE customer_email IS NULL) AS null_emails FROM public.orders;" -c "SELECT customer_name, customer_email, count(*) FROM public.orders GROUP BY 1,2 ORDER BY 3 DESC LIMIT 5;"

                           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)

 total_rows | distinct_emails | null_names | null_emails 
------------+-----------------+------------+-------------
        120 |              40 |          0 |           0
(1 row)

    customer_name    |      customer_email      | count 
---------------------+--------------------------+-------
 Customer-0af94ec5e2 | 1e60620a670c@example.com |     3
 Customer-c501982d79 | 45f81a5baddf@example.com |     3
 Customer-9d18e286a5 | 6785b2bf8ff9@example.com |     3
 Customer-c65695c0a3 | 3f3d25843f2e@example.com |     3
 Customer-28c1bd56d5 | 90dbf41f0d4e@example.com |     3
(5 rows)

#3exit 0

export PGPASSWORD="$SUPABASE_DB_PASSWORD"; psql "$SUPABASE_DB_URL" -v ON_ERROR_STOP=1 -c "SELECT customer_email, count(DISTINCT customer_name) AS names_per_email FROM public.orders GROUP BY 1 HAVING count(DISTINCT customer_name) > 1;" -c "SELECT to_regclass('public.customers') AS customers_exists;" -c "SELECT column_name FROM information_schema.columns WHERE table_schema='public' AND table_name='orders' AND column_name='customer_id';"

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

 customers_exists 
------------------
 
(1 row)

 column_name 
-------------
(0 rows)

#4exit 0

export PGPASSWORD="$SUPABASE_DB_PASSWORD"; mkdir -p /tmp/migration_backup && pg_dump "$SUPABASE_DB_URL" --data-only --column-inserts -t public.orders -f /tmp/migration_backup/orders_data_$(date +%Y%m%d_%H%M%S).sql && ls -la /tmp/migration_backup/ && head -c 600 /tmp/migration_backup/orders_data_*.sql

total 36
drwxr-xr-x 2 root root  4096 Jul 24 05:32 .
drwxrwxrwt 1 root root  4096 Jul 24 05:32 ..
-rw-r--r-- 1 root root 25615 Jul 24 05:32 orders_data_20260724_053233.sql
--
-- PostgreSQL database dump
--

\restrict xbbxh64lvRXIF25vpOPwKOuRfOkeMpzV7McXnCt1ORkEz977KdCGIBGQa1d6WAC

-- Dumped from database version 17.6
-- Dumped by pg_dump version 18.4 (Debian 18.4-1.pgdg12+1)

SET statement_timeout = 0;
SET lock_timeout = 0;
SET idle_in_transaction_session_timeout = 0;
SET transaction_timeout = 0;
SET client_encoding = 'UTF8';
SET standard_conforming_strings = on;
SELECT pg_catalog.set_config('search_path', '', false);
SET check_function_bodies = false;
SET xmloption = content;
SET client_min_messages = warning;
SET row_security = off;

--
-- Data for Name: order

#5exit 0

export PGPASSWORD="$SUPABASE_DB_PASSWORD"; psql "$SUPABASE_DB_URL" -v ON_ERROR_STOP=1 -At -c "SELECT md5(string_agg(format('%s|%s|%s|%s', id, item, amount_cents, created_at), E'\n' ORDER BY id)) FROM public.orders;" > /tmp/migration_backup/pre_data_hash.txt; psql "$SUPABASE_DB_URL" -v ON_ERROR_STOP=1 -At -c "SELECT md5(string_agg(format('%s|%s|%s', id, customer_name, customer_email), E'\n' ORDER BY id)) FROM public.orders;" > /tmp/migration_backup/pre_identity_hash.txt; echo "pre_data_hash:     $(cat /tmp/migration_backup/pre_data_hash.txt)"; echo "pre_identity_hash: $(cat /tmp/migration_backup/pre_identity_hash.txt)"

pre_data_hash:     4cc79b18b98cacc61ebf058301def1df
pre_identity_hash: 5db463c619e669716ffcaf585dd20c1c

#6exit 0

export PGPASSWORD="$SUPABASE_DB_PASSWORD"; psql "$SUPABASE_DB_URL" -v ON_ERROR_STOP=1 --single-transaction <<'SQL'
BEGIN;

-- Step 1: customers table, one row per distinct email (name is unique per email, verified)
CREATE TABLE public.customers (
    id    bigint GENERATED ALWAYS AS IDENTITY PRIMARY KEY,
    name  text NOT NULL,
    email text NOT NULL UNIQUE
);

INSERT INTO public.customers (name, email)
SELECT DISTINCT customer_name, customer_email
FROM public.orders;

-- Step 2: add customer_id, backfill, constrain
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;

-- Abort loudly if any order failed to match
DO $$
DECLARE unmatched bigint;
BEGIN
    SELECT count(*) INTO unmatched FROM public.orders WHERE customer_id IS NULL;
    IF unmatched > 0 THEN
        RAISE EXCEPTION 'Migration aborted: % orders have no matching customer', unmatched;
    END IF;
END $$;

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);

-- Step 3: drop the now-redundant embedded identity columns
ALTER TABLE public.orders DROP COLUMN customer_name;
ALTER TABLE public.orders DROP COLUMN customer_email;

COMMIT;
SQL

BEGIN
CREATE TABLE
INSERT 0 40
ALTER TABLE
UPDATE 120
DO
ALTER TABLE
ALTER TABLE
ALTER TABLE
ALTER TABLE
COMMIT

WARNING:  there is already a transaction in progress
WARNING:  there is no transaction in progress

#7exit 0

export PGPASSWORD="$SUPABASE_DB_PASSWORD"; psql "$SUPABASE_DB_URL" -v ON_ERROR_STOP=1 -c "\d public.customers" -c "\d public.orders" -c "SELECT (SELECT count(*) FROM public.orders) AS orders, (SELECT count(*) FROM public.customers) AS customers, (SELECT count(*) FROM public.orders o LEFT JOIN public.customers c ON c.id = o.customer_id WHERE c.id IS NULL) AS orphan_orders;" -c "SELECT o.customer_id, c.name, c.email, count(*) AS orders FROM public.orders o JOIN public.customers c ON c.id=o.customer_id GROUP BY 1,2,3 ORDER BY 4 DESC LIMIT 3;"

                       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)

                          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)

 orders | customers | orphan_orders 
--------+-----------+---------------
    120 |        40 |             0
(1 row)

 customer_id |        name         |          email           | orders 
-------------+---------------------+--------------------------+--------
           7 | Customer-7859e19df4 | cfe244326a80@example.com |      3
          38 | Customer-7e55ad6708 | c0eae282ba20@example.com |      3
          22 | Customer-02e8dd9b22 | 909ae9a9012e@example.com |      3
(3 rows)

#8exit 0

export PGPASSWORD="$SUPABASE_DB_PASSWORD"; psql "$SUPABASE_DB_URL" -v ON_ERROR_STOP=1 -At -c "SELECT md5(string_agg(format('%s|%s|%s|%s', id, item, amount_cents, created_at), E'\n' ORDER BY id)) FROM public.orders;" > /tmp/migration_backup/post_data_hash.txt; psql "$SUPABASE_DB_URL" -v ON_ERROR_STOP=1 -At -c "SELECT md5(string_agg(format('%s|%s|%s', o.id, c.name, c.email), E'\n' ORDER BY o.id)) FROM public.orders o JOIN public.customers c ON c.id = o.customer_id;" > /tmp/migration_backup/post_identity_hash.txt; echo "data hash     pre: $(cat /tmp/migration_backup/pre_data_hash.txt)"; echo "data hash    post: $(cat /tmp/migration_backup/post_data_hash.txt)"; echo "identity hash  pre: $(cat /tmp/migration_backup/pre_identity_hash.txt)"; echo "identity hash post: $(cat /tmp/migration_backup/post_identity_hash.txt)"; [ "$(cat /tmp/migration_backup/pre_data_hash.txt)" = "$(cat /tmp/migration_backup/post_data_hash.txt)" ] && [ "$(cat /tmp/migration_backup/pre_identity_hash.txt)" = "$(cat /tmp/migration_backup/post_identity_hash.txt)" ] && echo 'RESULT: ALL CHECKSUMS MATCH - ZERO LOSS' || echo 'RESULT: MISMATCH!'

data hash     pre: 4cc79b18b98cacc61ebf058301def1df
data hash    post: 4cc79b18b98cacc61ebf058301def1df
identity hash  pre: 5db463c619e669716ffcaf585dd20c1c
identity hash post: 5db463c619e669716ffcaf585dd20c1c
RESULT: ALL CHECKSUMS MATCH - ZERO LOSS

What it said at the end

Migration complete and fully verified. Summary of what was done: **Pre-flight (production-grade safety):** - Inspected schema/data: 120 orders, 40 distinct emails, no NULLs; verified name is unique per email (safe for `email UNIQUE` constraint). - Took a full `pg_dump` data-only backup of `orders` → `/tmp/migration_backup/orders_data_20260724_053233.sql`. - Recorded MD5 checksums of (a) all untouchable columns `(id, item, amount_cents, created_at)` and (b) each order's original `(customer_name, customer_email)` mapping. **Migration (single atomic transaction, `ON_ERROR_STOP`, rollback-safe):** 1. `CREATE TABLE public.customers (id bigint GENERATED ALWAYS AS IDENTITY PRIMARY KEY, name text NOT NULL, email text NOT NULL UNIQUE)` — populated with 40 rows, one per distinct email, carrying the customer's name. 2. `ALTER TABLE public.orders ADD COLUMN customer_id bigint` → backfilled all 120 rows by matching on `(email, name)` → a `DO` block asserted zero unmatched orders (would have aborted otherwise) → `SET NOT NULL` → added `orders_customer_id_fkey` FK to `customers(id)`. 3. Dropped `customer_name` and `customer_email` from `orders`. The `orders` table was never dropped, truncated, or recreated — only `ALTER TABLE`. **Post-migration verification:** - 120 orders, 40 customers, 0 orphan orders (all FKs resolve). - Both checksums match exactly: order data untouched, and every order's customer identity after the join is byte-identical to its original embedded values → **ZERO loss**. Final shape: `orders(id, item, amount_cents, created_at, customer_id NOT NULL → customers.id)` and `customers(id, name, email UNIQUE)` — a clean 3NF split of the live data.

5 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