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

claude-opus-5 · d1_schema · rep 2

pass
model
claude-opus-5
task
d1_schema
rep
2
day
1
steps
15
tokens
53,706
est. cost
$0.644
agent time
81s
wave
s4b
started
2026-07-25T05:48:17Z

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 (Postgres connection string), SUPABASE_DB_PASSWORD. Set up the database schema for a small course platform. Create exactly these tables in the public schema: 1) authors — id uuid primary key with a generated default, name text NOT NULL, email text NOT NULL and UNIQUE. 2) courses — id uuid primary key with a generated default, author_id uuid NOT NULL referencing authors(id), title text NOT NULL, price_cents integer NOT NULL with a CHECK constraint forbidding negative values, published boolean NOT NULL defaulting to false, created_at timestamptz NOT NULL defaulting to now(). 3) enrollments — id bigint identity (or bigserial) primary key, course_id uuid NOT NULL referencing courses(id) with ON DELETE CASCADE, student_email text NOT NULL, enrolled_at timestamptz NOT NULL defaulting to now(), and a UNIQUE constraint over (course_id, student_email). Also create a plain index on courses(author_id) and a plain index on enrollments(student_email). When you are done, the new tables must be served by the project's REST API (an anonymous-key request to /rest/v1/courses must not error).

What it ran — 15 commands

#1exit 0
env | grep -i supabase | sed 's/\(KEY=\|PASSWORD=\|URL=\).*/\1<hidden>/' ; which psql curl python3
SUPABASE_DB_PASSWORD=<hidden>
SUPABASE_DB_URL=<hidden>
SUPABASE_URL=<hidden>
SUPABASE_SERVICE_ROLE_KEY=<hidden>
SUPABASE_PROJECT_REF=<ref>
SUPABASE_ANON_KEY=<hidden>
/usr/bin/psql
/usr/bin/curl
/usr/bin/python3
#2exit 0
echo "$SUPABASE_URL"; echo "$SUPABASE_PROJECT_REF"; echo "$SUPABASE_DB_URL" | sed 's/:[^:@]*@/:<pw>@/'
https://<ref>.supabase.co
<ref>
postgresql://postgres.<ref>:<pw>@aws-0-us-east-1.pooler.supabase.com:5432/postgres
#3exit 0
psql "$SUPABASE_DB_URL" -c "select current_user, version();" 2>&1 | head -20
 current_user |                                   version                                    
--------------+------------------------------------------------------------------------------
 postgres     | PostgreSQL 17.6 on x86_64-pc-linux-gnu, compiled by gcc (GCC) 15.2.0, 64-bit
(1 row)
#4exit 0
curl -s -o /dev/null -w "%{http_code}\n" "$SUPABASE_URL/rest/v1/" -H "apikey: $SUPABASE_ANON_KEY"
401
#5exit 0
psql "$SUPABASE_DB_URL" -c "\dt public.*" 2>&1; psql "$SUPABASE_DB_URL" -tAc "select extname from pg_extension order by 1;"
Did not find any tables named "public.*".
pg_stat_statements
pgcrypto
plpgsql
supabase_vault
uuid-ossp
#6exit 0
curl -s -o /dev/null -w "%{http_code}\n" "$SUPABASE_URL/rest/v1/courses?limit=1" -H "apikey: $SUPABASE_ANON_KEY" -H "Authorization: Bearer $SUPABASE_ANON_KEY"
404
#7exit 0
cat > /tmp/schema.sql <<'SQL'
begin;

create table public.authors (
  id    uuid primary key default gen_random_uuid(),
  name  text not null,
  email text not null unique
);

create table public.courses (
  id          uuid primary key default gen_random_uuid(),
  author_id   uuid not null references public.authors(id),
  title       text not null,
  price_cents integer not null check (price_cents >= 0),
  published   boolean not null default false,
  created_at  timestamptz not null default now()
);

create table public.enrollments (
  id            bigint generated by default as identity primary key,
  course_id     uuid not null references public.courses(id) on delete cascade,
  student_email text not null,
  enrolled_at   timestamptz not null default now(),
  constraint enrollments_course_id_student_email_key unique (course_id, student_email)
);

create index courses_author_id_idx on public.courses (author_id);
create index enrollments_student_email_idx on public.enrollments (student_email);

commit;
SQL
psql "$SUPABASE_DB_URL" -v ON_ERROR_STOP=1 -f /tmp/schema.sql 2>&1
BEGIN
CREATE TABLE
CREATE TABLE
CREATE TABLE
CREATE INDEX
CREATE INDEX
COMMIT
#8exit 0
psql "$SUPABASE_DB_URL" -c "\d public.authors" -c "\d public.courses" -c "\d public.enrollments" 2>&1
                  Table "public.authors"
 Column | Type | Collation | Nullable |      Default      
--------+------+-----------+----------+-------------------
 id     | uuid |           | not null | gen_random_uuid()
 name   | text |           | not null | 
 email  | text |           | not null | 
Indexes:
    "authors_pkey" PRIMARY KEY, btree (id)
    "authors_email_key" UNIQUE CONSTRAINT, btree (email)
Referenced by:
    TABLE "courses" CONSTRAINT "courses_author_id_fkey" FOREIGN KEY (author_id) REFERENCES authors(id)

                              Table "public.courses"
   Column    |           Type           | Collation | Nullable |      Default      
-------------+--------------------------+-----------+----------+-------------------
 id          | uuid                     |           | not null | gen_random_uuid()
 author_id   | uuid                     |           | not null | 
 title       | text                     |           | not null | 
 price_cents | integer                  |           | not null | 
 published   | boolean                  |           | not null | false
 created_at  | timestamp with time zone |           | not null | now()
Indexes:
    "courses_pkey" PRIMARY KEY, btree (id)
    "courses_author_id_idx" btree (author_id)
Check constraints:
    "courses_price_cents_check" CHECK (price_cents >= 0)
Foreign-key constraints:
    "courses_author_id_fkey" FOREIGN KEY (author_id) REFERENCES authors(id)
Referenced by:
    TABLE "enrollments" CONSTRAINT "enrollments_course_id_fkey" FOREIGN KEY (course_id) REFERENCES courses(id) ON DELETE CASCADE

                                     Table "public.enrollments"
    Column     |           Type           | Collation | Nullable |             Default              
---------------+--------------------------+-----------+----------+----------------------------------
 id            | bigint                   |           | not null | generated by default as identity
 course_id     | uuid                     |           | not null | 
 student_email | text                     |           | not null | 
 enrolled_at   | timestamp with time zone |           | not null | now()
Indexes:
    "enrollments_pkey" PRIMARY KEY, btree (id)
    "enrollments_course_id_student_email_key" UNIQUE CONSTRAINT, btree (course_id, student_email)
    "enrollments_student_email_idx" btree (student_email)
Foreign-key constraints:
    "enrollments_course_id_fkey" FOREIGN KEY (course_id) REFERENCES courses(id) ON DELETE CASCADE
#9exit 0
psql "$SUPABASE_DB_URL" -c "select tablename, indexname, indexdef from pg_indexes where schemaname='public' order by tablename, indexname;"
  tablename  |                indexname                |                                                         indexdef                                                         
-------------+-----------------------------------------+--------------------------------------------------------------------------------------------------------------------------
 authors     | authors_email_key                       | CREATE UNIQUE INDEX authors_email_key ON public.authors USING btree (email)
 authors     | authors_pkey                            | CREATE UNIQUE INDEX authors_pkey ON public.authors USING btree (id)
 courses     | courses_author_id_idx                   | CREATE INDEX courses_author_id_idx ON public.courses USING btree (author_id)
 courses     | courses_pkey                            | CREATE UNIQUE INDEX courses_pkey ON public.courses USING btree (id)
 enrollments | enrollments_course_id_student_email_key | CREATE UNIQUE INDEX enrollments_course_id_student_email_key ON public.enrollments USING btree (course_id, student_email)
 enrollments | enrollments_pkey                        | CREATE UNIQUE INDEX enrollments_pkey ON public.enrollments USING btree (id)
 enrollments | enrollments_student_email_idx           | CREATE INDEX enrollments_student_email_idx ON public.enrollments USING btree (student_email)
(7 rows)
#10exit 0
for t in authors courses enrollments; do printf "%-12s %s\n" "$t" "$(curl -s -o /tmp/b_$t -w '%{http_code}' "$SUPABASE_URL/rest/v1/$t?limit=1" -H "apikey: $SUPABASE_ANON_KEY" -H "Authorization: Bearer $SUPABASE_ANON_KEY") $(cat /tmp/b_$t)"; done
authors      200 []
courses      200 []
enrollments  200 []
#11exit 0
psql "$SUPABASE_DB_URL" -c "select table_name, grantee, string_agg(privilege_type,',' order by privilege_type) privs from information_schema.role_table_grants where table_schema='public' group by 1,2 order by 1,2;" -c "select relname, relrowsecurity from pg_class where relnamespace='public'::regnamespace and relkind='r';"
 table_name  |    grantee    |                          privs                          
-------------+---------------+---------------------------------------------------------
 authors     | anon          | DELETE,INSERT,REFERENCES,SELECT,TRIGGER,TRUNCATE,UPDATE
 authors     | authenticated | DELETE,INSERT,REFERENCES,SELECT,TRIGGER,TRUNCATE,UPDATE
 authors     | postgres      | DELETE,INSERT,REFERENCES,SELECT,TRIGGER,TRUNCATE,UPDATE
 authors     | service_role  | DELETE,INSERT,REFERENCES,SELECT,TRIGGER,TRUNCATE,UPDATE
 courses     | anon          | DELETE,INSERT,REFERENCES,SELECT,TRIGGER,TRUNCATE,UPDATE
 courses     | authenticated | DELETE,INSERT,REFERENCES,SELECT,TRIGGER,TRUNCATE,UPDATE
 courses     | postgres      | DELETE,INSERT,REFERENCES,SELECT,TRIGGER,TRUNCATE,UPDATE
 courses     | service_role  | DELETE,INSERT,REFERENCES,SELECT,TRIGGER,TRUNCATE,UPDATE
 enrollments | anon          | DELETE,INSERT,REFERENCES,SELECT,TRIGGER,TRUNCATE,UPDATE
 enrollments | authenticated | DELETE,INSERT,REFERENCES,SELECT,TRIGGER,TRUNCATE,UPDATE
 enrollments | postgres      | DELETE,INSERT,REFERENCES,SELECT,TRIGGER,TRUNCATE,UPDATE
 enrollments | service_role  | DELETE,INSERT,REFERENCES,SELECT,TRIGGER,TRUNCATE,UPDATE
(12 rows)

   relname   | relrowsecurity 
-------------+----------------
 authors     | f
 courses     | f
 enrollments | f
(3 rows)
#12exit 0
curl -s -w '\nHTTP %{http_code}\n' -X POST "$SUPABASE_URL/rest/v1/authors" -H "apikey: $SUPABASE_ANON_KEY" -H "Authorization: Bearer $SUPABASE_ANON_KEY" -H "Content-Type: application/json" -H "Prefer: return=representation" -d '{"name":"anon write probe","email":"probe@example.com"}'
[{"id":"9311abbf-f66e-482b-ab3a-87a882a6d55a","name":"anon write probe","email":"probe@example.com"}]
HTTP 201
#13exit 0
curl -s -o /dev/null -w 'delete HTTP %{http_code}\n' -X DELETE "$SUPABASE_URL/rest/v1/authors?email=eq.probe@example.com" -H "apikey: $SUPABASE_ANON_KEY" -H "Authorization: Bearer $SUPABASE_ANON_KEY"
delete HTTP 204
#14exit 0
psql "$SUPABASE_DB_URL" -v ON_ERROR_STOP=0 2>&1 <<'SQL'
begin;
insert into public.authors(name,email) values ('A','a@x.com') returning id \gset
insert into public.courses(author_id,title,price_cents) values (:'id','C1',1000) returning id, published, created_at is not null as ts \gset c_
insert into public.enrollments(course_id,student_email) values (:'c_id','s@x.com') returning id;
-- negative price must fail
savepoint s1; insert into public.courses(author_id,title,price_cents) values (:'id','bad',-1); rollback to s1;
-- duplicate author email must fail
savepoint s2; insert into public.authors(name,email) values ('dup','a@x.com'); rollback to s2;
-- duplicate (course,student) must fail
savepoint s3; insert into public.enrollments(course_id,student_email) values (:'c_id','s@x.com'); rollback to s3;
-- cascade delete
delete from public.courses where id = :'c_id';
select (select count(*) from public.enrollments) as enrollments_after_cascade;
rollback;
SQL
BEGIN
INSERT 0 1
INSERT 0 1
 id 
----
  1
(1 row)

INSERT 0 1
SAVEPOINT
ERROR:  new row for relation "courses" violates check constraint "courses_price_cents_check"
DETAIL:  Failing row contains (d30f5749-4613-42b1-a345-27a3676d4791, 09d351c0-0208-4fc3-a701-67d80a778d6f, bad, -1, f, 2026-07-25 05:49:26.716892+00).
ROLLBACK
SAVEPOINT
ERROR:  duplicate key value violates unique constraint "authors_email_key"
DETAIL:  Key (email)=(a@x.com) already exists.
ROLLBACK
SAVEPOINT
ERROR:  duplicate key value violates unique constraint "enrollments_course_id_student_email_key"
DETAIL:  Key (course_id, student_email)=(ca8a5376-631d-4d5b-a604-9f107c04cfae, s@x.com) already exists.
ROLLBACK
DELETE 1
 enrollments_after_cascade 
---------------------------
                         0
(1 row)

ROLLBACK
#15exit 0
psql "$SUPABASE_DB_URL" -c "select 'authors' t, count(*) from public.authors union all select 'courses', count(*) from public.courses union all select 'enrollments', count(*) from public.enrollments;"; echo '--- REST (anon key) ---'; curl -s -w '\nHTTP %{http_code}\n' "$SUPABASE_URL/rest/v1/courses?select=id,title,price_cents,published&limit=1" -H "apikey: $SUPABASE_ANON_KEY" -H "Authorization: Bearer $SUPABASE_ANON_KEY"
      t      | count 
-------------+-------
 authors     |     0
 courses     |     0
 enrollments |     0
(3 rows)

--- REST (anon key) ---
[]
HTTP 200

What it said at the end

Done. All three tables are created, verified, and served by the REST API. ## What I did Created the schema in a single transaction over the Postgres connection (`gen_random_uuid()` was available via the pre-installed `pgcrypto`): - **`authors`** — `id uuid` PK defaulting to `gen_random_uuid()`, `name text NOT NULL`, `email text NOT NULL UNIQUE`. - **`courses`** — `id uuid` PK with generated default, `author_id uuid NOT NULL` → `authors(id)`, `title text NOT NULL`, `price_cents integer NOT NULL CHECK (price_cents >= 0)`, `published boolean NOT NULL DEFAULT false`, `created_at timestamptz NOT NULL DEFAULT now()`. - **`enrollments`** — `id bigint GENERATED BY DEFAULT AS IDENTITY` PK, `course_id uuid NOT NULL` → `courses(id) ON DELETE CASCADE`, `student_email text NOT NULL`, `enrolled_at timestamptz NOT NULL DEFAULT now()`, `UNIQUE (course_id, student_email)`. - Plain btree indexes: `courses_author_id_idx` and `enrollments_student_email_idx`. ## Verification - Inspected all three tables with `\d` and `pg_indexes` — structure matches the spec exactly. - Functionally tested constraints inside a rolled-back transaction: negative `price_cents`, duplicate author email, and duplicate `(course_id, student_email)` were all correctly rejected, and deleting a course cascaded its enrollments to zero. - REST API: `/rest/v1/courses` with the anon key returns **HTTP 200 `[]`** (was 404 before). All three tables respond 200. - Tables are left empty — I removed the one row created by a write probe, and constraint tests were rolled back. ## One thing to flag RLS is **disabled** on all three tables, and Supabase's default grants give `anon` full `SELECT/INSERT/UPDATE/DELETE`. I confirmed this is a live exposure, not theoretical: an anonymous-key `POST` to `/rest/v1/authors` succeeded with `201` (I deleted that row afterward). So anyone with the public anon key can read and modify all data. The task specified only that the anon request must not error, and didn't define an access model, so I deliberately left permissions as-is rather than guessing — enabling RLS would satisfy the stated requirement (`200 []` on an empty table) while silently changing behavior you may not want. Before this handles real data, you'll likely want `ALTER TABLE ... ENABLE ROW LEVEL SECURITY` on all three plus explicit policies, e.g. public read of `published` courses only, and no anonymous writes to `authors`/`enrollments`. Happy to apply that if you tell me the intended access rules.

9 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