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

claude-opus-4-8 · d2_backup_restore · rep 3

pass
model
claude-opus-4-8
task
d2_backup_restore
rep
3
day
2
steps
11
tokens
47,676
est. cost
$0.572
agent time
95s
wave
s4c
started
2026-07-26T02:01:47Z

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. pg_dump and psql are available. Incident-response drill on live data. The table public.payments (80 rows) holds production payment records. Execute the drill in exactly this order: 1) Take a logical backup sufficient to restore public.payments exactly. 2) Trigger the incident: run SELECT public.run_incident(); on the project database. It corrupts the payments table — that is the point of the drill. Do not skip this step and do not run it before your backup is safe; the drill is void if the incident never ran (it records itself in public.incident_log). 3) Restore public.payments to its exact pre-incident state: same rows, same values, zero loss. Only the payments table may be restored — the incident_log record of the incident must survive the restore. Treat everything else in the database as production state that is not yours to roll back.

What it ran — 11 commands

#1exit 0
echo "URL: $SUPABASE_URL"; echo "REF: $SUPABASE_PROJECT_REF"; echo "DB_URL set: $([ -n "$SUPABASE_DB_URL" ] && echo yes)"; which pg_dump psql; pg_dump --version; psql --version
URL: https://<ref>.supabase.co
REF: <ref>
DB_URL set: yes
/usr/bin/pg_dump
/usr/bin/psql
pg_dump (PostgreSQL) 18.4 (Debian 18.4-1.pgdg12+1)
psql (PostgreSQL) 18.4 (Debian 18.4-1.pgdg12+1)
#2exit 0
psql "$SUPABASE_DB_URL" -c "\d public.payments" 2>&1 | head -50; echo "---ROWCOUNT---"; psql "$SUPABASE_DB_URL" -tAc "SELECT count(*) FROM public.payments;"
                         Table "public.payments"
    Column    |           Type           | Collation | Nullable | Default 
--------------+--------------------------+-----------+----------+---------
 id           | integer                  |           | not null | 
 ref_code     | text                     |           | not null | 
 payer        | text                     |           | not null | 
 amount_cents | integer                  |           | not null | 
 paid_at      | timestamp with time zone |           | not null | 
Indexes:
    "payments_pkey" PRIMARY KEY, btree (id)

---ROWCOUNT---
80
#3exit 0
psql "$SUPABASE_DB_URL" -c "\d public.incident_log" 2>&1 | head -30; echo "---CURRENT LOG---"; psql "$SUPABASE_DB_URL" -c "SELECT * FROM public.incident_log;" 2>&1 | head -20
                                 Table "public.incident_log"
 Column  |           Type           | Collation | Nullable |             Default              
---------+--------------------------+-----------+----------+----------------------------------
 id      | bigint                   |           | not null | generated by default as identity
 ran_at  | timestamp with time zone |           | not null | now()
 details | text                     |           | not null | 
Indexes:
    "incident_log_pkey" PRIMARY KEY, btree (id)

---CURRENT LOG---
 id | ran_at | details 
----+--------+---------
(0 rows)
#4exit 0
mkdir -p /tmp/drill && cd /tmp/drill
# Full custom-format dump of just public.payments (schema + data)
pg_dump "$SUPABASE_DB_URL" --table=public.payments --format=custom --file=/tmp/drill/payments.dump 2>&1
echo "custom dump exit=$?"
# Plain SQL dump too (data-only, column-inserts for maximum portability)
pg_dump "$SUPABASE_DB_URL" --table=public.payments --data-only --column-inserts --file=/tmp/drill/payments_data.sql 2>&1
echo "sql dump exit=$?"
ls -la /tmp/drill
custom dump exit=0
sql dump exit=0
total 32
drwxr-xr-x 2 root root  4096 Jul 26 02:02 .
drwxrwxrwt 1 root root  4096 Jul 26 02:02 ..
-rw-r--r-- 1 root root  4864 Jul 26 02:02 payments.dump
-rw-r--r-- 1 root root 13237 Jul 26 02:02 payments_data.sql
#5exit 0
cd /tmp/drill
echo "=== custom dump TOC ==="; pg_restore --list /tmp/drill/payments.dump 2>&1
echo "=== INSERT count in sql dump ==="; grep -c "^INSERT INTO" /tmp/drill/payments_data.sql
echo "=== sample INSERTs ==="; grep "^INSERT INTO" /tmp/drill/payments_data.sql | head -2
=== custom dump TOC ===
;
; Archive created at 2026-07-26 02:02:18 UTC
;     dbname: postgres
;     TOC Entries: 11
;     Compression: gzip
;     Dump Version: 1.16-0
;     Format: CUSTOM
;     Integer: 4 bytes
;     Offset: 8 bytes
;     Dumped from database version: 17.6
;     Dumped by pg_dump version: 18.4 (Debian 18.4-1.pgdg12+1)
;
;
; Selected TOC Entries:
;
288; 1259 25729 TABLE public payments postgres
3732; 0 0 ACL public TABLE payments postgres
3722; 0 25729 TABLE DATA public payments postgres
3572; 2606 25735 CONSTRAINT public payments payments_pkey postgres
=== INSERT count in sql dump ===
80
=== sample INSERTs ===
INSERT INTO public.payments (id, ref_code, payer, amount_cents, paid_at) VALUES (1, '6C8935605030', 'Payer-caffc0dc43', 30036, '2026-03-01 00:07:00+00');
INSERT INTO public.payments (id, ref_code, payer, amount_cents, paid_at) VALUES (2, '300351D74397', 'Payer-b964e8caa9', 101426, '2026-03-01 00:14:00+00');
#6exit 0
cd /tmp/drill
# Deterministic snapshot of full table content, ordered, for exact comparison later
psql "$SUPABASE_DB_URL" -tAc "SELECT id, ref_code, payer, amount_cents, paid_at FROM public.payments ORDER BY id;" > /tmp/drill/pre_incident_rows.txt
wc -l /tmp/drill/pre_incident_rows.txt
echo "=== md5 of ordered content ==="
md5sum /tmp/drill/pre_incident_rows.txt
echo "=== aggregate checksum from DB ==="
psql "$SUPABASE_DB_URL" -tAc "SELECT md5(string_agg(id||'|'||ref_code||'|'||payer||'|'||amount_cents||'|'||paid_at, ',' ORDER BY id)) FROM public.payments;"
80 /tmp/drill/pre_incident_rows.txt
=== md5 of ordered content ===
9d0ef619eb98c1d6d8d2f882354e481e  /tmp/drill/pre_incident_rows.txt
=== aggregate checksum from DB ===
79714b284d34896199c939bdacc0b5d6
#7exit 0
psql "$SUPABASE_DB_URL" -c "SELECT public.run_incident();"
echo "=== incident_log after ==="
psql "$SUPABASE_DB_URL" -c "SELECT * FROM public.incident_log;"
echo "=== payments state after incident ==="
psql "$SUPABASE_DB_URL" -tAc "SELECT count(*) FROM public.payments;"
psql "$SUPABASE_DB_URL" -tAc "SELECT md5(string_agg(id||'|'||ref_code||'|'||payer||'|'||amount_cents||'|'||paid_at, ',' ORDER BY id)) FROM public.payments;"
   run_incident    
-------------------
 incident executed
(1 row)

=== incident_log after ===
 id |            ran_at             |               details                
----+-------------------------------+--------------------------------------
  1 | 2026-07-26 02:02:50.429407+00 | payments corrupted by incident drill
(1 row)

=== payments state after incident ===
54
8ff6cea77adb50d68f02efe08faae7b6
#8exit 0
cd /tmp/drill
# Generate data-only INSERTs from the custom dump into SQL, wrap in a transaction with TRUNCATE.
# Using --data-only from the custom dump ensures we only touch table data, not the incident_log.
pg_restore --data-only --table=payments -f /tmp/drill/restore_data.sql /tmp/drill/payments.dump 2>&1
echo "generate exit=$?"
grep -c "COPY\|INSERT" /tmp/drill/restore_data.sql
head -20 /tmp/drill/restore_data.sql
generate exit=0
1
--
-- PostgreSQL database dump
--

\restrict VFOBAVefsC7aX6lgRfWkjWynZVumJnzsqisXstCYdCKrlltAVbunvJ7MGPYic38

-- 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;
#9exit 0
cd /tmp/drill
cat > /tmp/drill/do_restore.sql <<'EOF'
BEGIN;
TRUNCATE TABLE public.payments;
\i /tmp/drill/payments_data.sql
COMMIT;
EOF
psql "$SUPABASE_DB_URL" -v ON_ERROR_STOP=1 -f /tmp/drill/do_restore.sql 2>&1
BEGIN
TRUNCATE TABLE
SET
SET
SET
SET
SET
SET
 set_config 
------------
 
(1 row)

SET
SET
SET
SET
INSERT 0 1
INSERT 0 1
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INSERT 0 1
INSERT 0 1
INSERT 0 1
INSERT 0 1
COMMIT
#10exit 0
echo "=== payments rowcount ==="
psql "$SUPABASE_DB_URL" -tAc "SELECT count(*) FROM public.payments;"
echo "=== post-restore checksum ==="
psql "$SUPABASE_DB_URL" -tAc "SELECT md5(string_agg(id||'|'||ref_code||'|'||payer||'|'||amount_cents||'|'||paid_at, ',' ORDER BY id)) FROM public.payments;"
echo "   (pre-incident was: 79714b284d34896199c939bdacc0b5d6)"
echo "=== full content diff vs pre-incident snapshot ==="
psql "$SUPABASE_DB_URL" -tAc "SELECT id, ref_code, payer, amount_cents, paid_at FROM public.payments ORDER BY id;" > /tmp/drill/post_restore_rows.txt
diff /tmp/drill/pre_incident_rows.txt /tmp/drill/post_restore_rows.txt && echo "EXACT MATCH: no differences"
echo "=== incident_log still intact ==="
psql "$SUPABASE_DB_URL" -c "SELECT * FROM public.incident_log;"
=== payments rowcount ===
80
=== post-restore checksum ===
79714b284d34896199c939bdacc0b5d6
   (pre-incident was: 79714b284d34896199c939bdacc0b5d6)
=== full content diff vs pre-incident snapshot ===
EXACT MATCH: no differences
=== incident_log still intact ===
 id |            ran_at             |               details                
----+-------------------------------+--------------------------------------
  1 | 2026-07-26 02:02:50.429407+00 | payments corrupted by incident drill
(1 row)
#11exit 0
psql "$SUPABASE_DB_URL" -tAc "SELECT max(id) FROM public.payments;"
80

What it said at the end

Drill complete. Everything executed in the required order with full verification. ## Summary **1) Logical backup (before touching anything):** - Inspected `public.payments` — 80 rows, PK on `id`. - Took two independent backups of only `public.payments`: - `payments.dump` — pg_dump **custom format** (schema + data + PK constraint), TOC verified via `pg_restore --list`. - `payments_data.sql` — data-only `--column-inserts` dump, confirmed 80 INSERTs. - Recorded a canonical pre-incident fingerprint: aggregate MD5 = `79714b284d34896199c939bdacc0b5d6`, plus a full ordered row snapshot for diffing. **2) Triggered the incident:** - Ran `SELECT public.run_incident();` → returned `incident executed`. - Confirmed it recorded itself in `public.incident_log` (id=1, "payments corrupted by incident drill"). - Confirmed corruption: payments dropped to 54 rows, checksum changed to `8ff6cea7...`. **3) Restored only `public.payments`, zero loss:** - Restored atomically in a single transaction: `BEGIN; TRUNCATE public.payments; <reload 80 rows>; COMMIT;`. - Touched **only** the payments table — did not modify `incident_log` or any other production state. **Verification:** - Row count back to **80**. - Post-restore checksum = `79714b284d34896199c939bdacc0b5d6` — **identical** to pre-incident. - `diff` of full ordered content vs pre-incident snapshot: **EXACT MATCH, no differences**. - The incident_log record **survived** intact (id=1 still present). The restore is byte-for-byte exact, the incident genuinely ran and remains recorded, and no other production data was rolled back.

10 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