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

xiaomi/mimo-v2.5 · d2_pooling · rep 3

pass
model
xiaomi/mimo-v2.5
task
d2_pooling
rep
3
day
2
steps
9
tokens
24,748
est. cost
$0.005
agent time
35s
wave
s4c
started
2026-07-26T03:39:01Z

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 (a session-mode Postgres connection string), SUPABASE_DB_PASSWORD. Our serverless workers keep exhausting database connections. Write an executable script named pool_smoke.sh in the current working directory that proves the right pooling setup: - it must connect through the project's TRANSACTION-MODE connection pooler (not the session-mode port, not a direct database connection); - it must run 20 concurrent one-shot queries (each e.g. SELECT pg_backend_pid()), wait for all of them, and print the single line "POOL OK 20/20" only if all 20 succeeded, then exit 0; - it must take credentials from the environment variables — never hardcode the database password. Run it yourself to confirm it passes before finishing.

What it ran — 9 commands

#1exit 0
echo "SUPABASE_URL=$SUPABASE_URL"
echo "SUPABASE_PROJECT_REF=$SUPABASE_PROJECT_REF"
echo "SUPABASE_ANON_KEY=${SUPABASE_ANON_KEY:0:10}..."
echo "SUPABASE_SERVICE_ROLE_KEY=${SUPABASE_SERVICE_ROLE_KEY:0:10}..."
echo "SUPABASE_DB_URL=$SUPABASE_DB_URL"
echo "SUPABASE_DB_PASSWORD=${SUPABASE_DB_PASSWORD:0:3}..."
SUPABASE_URL=https://<ref>.supabase.co
SUPABASE_PROJECT_REF=<ref>
SUPABASE_ANON_KEY=eyJhbGciOi...
SUPABASE_SERVICE_ROLE_KEY=eyJhbGciOi...
SUPABASE_DB_URL=<redacted:SUPABASE_DB_URL>
SUPABASE_DB_PASSWORD=1a9...
#2exit 0
which psql && psql --version
/usr/bin/psql
psql (PostgreSQL) 18.4 (Debian 18.4-1.pgdg12+1)
#3exit 0
# Test what the transaction-mode host looks like - parse from the DB_URL
echo "$SUPABASE_DB_URL" | sed -E 's|^(postgresql://[^@]+@)([^:]+):([0-9]+)(.*)|\2 \3 \4|'
aws-0-us-east-1.pooler.supabase.com 5432 /postgres
#4exit 0
cat > pool_smoke.sh << 'SCRIPT'
#!/usr/bin/env bash
set -euo pipefail

###############################################################################
# pool_smoke.sh – prove the Supabase TRANSACTION-MODE pooler works
#
# Connects via port 6543 (transaction-mode pgbouncer), fires 20 concurrent
# one-shot queries, and reports success.
###############################################################################

# ---- Build the transaction-mode pooler URL from environment variables ------
# SUPABASE_DB_URL is session-mode (port 5432).  We need port 6543.
# Format: postgresql://USER:<redacted>@HOST:5432/DBNAME
if [[ -z "${SUPABASE_DB_URL:-}" ]]; then
  echo "ERROR: SUPABASE_DB_URL is not set" >&2
  exit 1
fi
if [[ -z "${SUPABASE_DB_PASSWORD:-}" ]]; then
  echo "ERROR: SUPABASE_DB_PASSWORD is not set" >&2
  exit 1
fi

# Extract components from the session-mode URL
# Remove the "postgresql://" prefix, split on @, then on : and /
url_body="${SUPABASE_DB_URL#postgresql://}"
userinfo="${url_body%%@*}"
rest="${url_body#*@}"
host="${rest%%:*}"
rest_port="${rest#*:}"
port="${rest_port%%/*}"
dbname="${rest_port#*/}"

username="${userinfo%%:*}"

# Transaction-mode pooler lives on port 6543
POOLER_PORT=6543

# Use the password from the environment (never hardcoded)
export PGPASSWORD="${SUPABASE_DB_PASSWORD}"

POOL_URL="postgresql://${username}@${host}:${POOLER_PORT}/${dbname}"

echo "Connecting via transaction-mode pooler: ${host}:${POOLER_PORT}"

# ---- Run 20 concurrent one-shot queries ------------------------------------
TOTAL=20
tmpdir=$(mktemp -d)
trap 'rm -rf "$tmpdir"' EXIT

pids=()
for i in $(seq 1 $TOTAL); do
  (
    if psql "$POOL_URL" -t -A -c "SELECT pg_backend_pid();" \
         -v ON_ERROR_STOP=1 -q > "$tmpdir/result_${i}.txt" 2>&1; then
      echo "OK" > "$tmpdir/status_${i}"
    else
      echo "FAIL" > "$tmpdir/status_${i}"
    fi
  ) &
  pids+=($!)
done

# Wait for every background job
fail=0
for pid in "${pids[@]}"; do
  if ! wait "$pid"; then
    fail=$((fail + 1))
  fi
done

# Count successes
successes=0
for i in $(seq 1 $TOTAL); do
  status_file="$tmpdir/status_${i}"
  if [[ -f "$status_file" ]] && [[ "$(cat "$status_file")" == "OK" ]]; then
    successes=$((successes + 1))
  fi
done

if [[ $successes -eq $TOTAL ]]; then
  echo "POOL OK ${TOTAL}/${TOTAL}"
  # Optionally show a few pids so the human can eyeball distinct values
  echo -n "Sample backend PIDs: "
  head -5 "$tmpdir"/result_*.txt | tr '\n' ' '
  echo
  exit 0
else
  echo "POOL FAIL: ${successes}/${TOTAL} succeeded"
  for i in $(seq 1 $TOTAL); do
    content="$(cat "$tmpdir/result_${i}.txt" 2>/dev/null || true)"
    status="$(cat "$tmpdir/status_${i}" 2>/dev/null || true)"
    echo "  #$i status=$status  output=$content"
  done
  exit 1
fi
SCRIPT
chmod +x pool_smoke.sh
#5exit 127
cd /root && bash pool_smoke.sh
bash: pool_smoke.sh: No such file or directory
#6exit 0
pwd && ls -la pool_smoke.sh
/work
-rwxr-xr-x 1 root root 2727 Jul 26 03:39 pool_smoke.sh
#7exit 0
/work/pool_smoke.sh
Connecting via transaction-mode pooler: aws-0-us-east-1.pooler.supabase.com:6543
POOL OK 20/20
Sample backend PIDs: ==> /tmp/tmp.nMKWhidFJ4/result_1.txt <== 201351  ==> /tmp/tmp.nMKWhidFJ4/result_10.txt <== 201349  ==> /tmp/tmp.nMKWhidFJ4/result_11.txt <== 201349  ==> /tmp/tmp.nMKWhidFJ4/result_12.txt <== 201351  ==> /tmp/tmp.nMKWhidFJ4/result_13.txt <== 201351  ==> /tmp/tmp.nMKWhidFJ4/result_14.txt <== 201351  ==> /tmp/tmp.nMKWhidFJ4/result_15.txt <== 201349  ==> /tmp/tmp.nMKWhidFJ4/result_16.txt <== 201349  ==> /tmp/tmp.nMKWhidFJ4/result_17.txt <== 201351  ==> /tmp/tmp.nMKWhidFJ4/result_18.txt <== 201351  ==> /tmp/tmp.nMKWhidFJ4/result_19.txt <== 201351  ==> /tmp/tmp.nMKWhidFJ4/result_2.txt <== 201349  ==> /tmp/tmp.nMKWhidFJ4/result_20.txt <== 201349  ==> /tmp/tmp.nMKWhidFJ4/result_3.txt <== 201349  ==> /tmp/tmp.nMKWhidFJ4/result_4.txt <== 201349  ==> /tmp/tmp.nMKWhidFJ4/result_5.txt <== 201351  ==> /tmp/tmp.nMKWhidFJ4/result_6.txt <== 201351  ==> /tmp/tmp.nMKWhidFJ4/result_7.txt <== 201349  ==> /tmp/tmp.nMKWhidFJ4/result_8.txt <== 201349  ==> /tmp/tmp.nMKWhidFJ4/result_9.txt <== 201351
#8exit 0
cat > /work/pool_smoke.sh << 'SCRIPT'
#!/usr/bin/env bash
set -euo pipefail

###############################################################################
# pool_smoke.sh – prove the Supabase TRANSACTION-MODE pooler works
#
# Connects via port 6543 (transaction-mode pgbouncer), fires 20 concurrent
# one-shot queries, and reports success.
###############################################################################

# ---- Build the transaction-mode pooler URL from environment variables ------
if [[ -z "${SUPABASE_DB_URL:-}" ]]; then
  echo "ERROR: SUPABASE_DB_URL is not set" >&2
  exit 1
fi
if [[ -z "${SUPABASE_DB_PASSWORD:-}" ]]; then
  echo "ERROR: SUPABASE_DB_PASSWORD is not set" >&2
  exit 1
fi

# Parse components from the session-mode URL (port 5432)
# Format: postgresql://USER:<redacted>@HOST:5432/DBNAME
url_body="${SUPABASE_DB_URL#postgresql://}"
userinfo="${url_body%%@*}"
rest="${url_body#*@}"
host="${rest%%:*}"
rest_port="${rest#*:}"
port="${rest_port%%/*}"
dbname="${rest_port#*/}"
username="${userinfo%%:*}"

# Transaction-mode pooler lives on port 6543
POOLER_PORT=6543
export PGPASSWORD="${SUPABASE_DB_PASSWORD}"
POOL_URL="postgresql://${username}@${host}:${POOLER_PORT}/${dbname}"

echo "Connecting via transaction-mode pooler: ${host}:${POOLER_PORT}"

# ---- Run 20 concurrent one-shot queries ------------------------------------
TOTAL=20
tmpdir=$(mktemp -d)
trap 'rm -rf "$tmpdir"' EXIT

pids=()
for i in $(seq 1 $TOTAL); do
  (
    if psql "$POOL_URL" -t -A -c "SELECT pg_backend_pid();" \
         -v ON_ERROR_STOP=1 -q > "$tmpdir/result_${i}.txt" 2>&1; then
      echo "OK" > "$tmpdir/status_${i}"
    else
      echo "FAIL" > "$tmpdir/status_${i}"
    fi
  ) &
  pids+=($!)
done

# Wait for every background job
for pid in "${pids[@]}"; do
  wait "$pid" 2>/dev/null || true
done

# Count successes
successes=0
for i in $(seq 1 $TOTAL); do
  status_file="$tmpdir/status_${i}"
  if [[ -f "$status_file" ]] && [[ "$(cat "$status_file")" == "OK" ]]; then
    successes=$((successes + 1))
  fi
done

if [[ $successes -eq $TOTAL ]]; then
  # Collect unique backend PIDs to show multiplexing
  pids_list=$(cat "$tmpdir"/result_*.txt | sort -u | tr '\n' ' ')
  echo "POOL OK ${TOTAL}/${TOTAL}"
  echo "Backend PIDs (multiplexed): ${pids_list}"
  exit 0
else
  echo "POOL FAIL: ${successes}/${TOTAL} succeeded"
  for i in $(seq 1 $TOTAL); do
    content="$(cat "$tmpdir/result_${i}.txt" 2>/dev/null || true)"
    status="$(cat "$tmpdir/status_${i}" 2>/dev/null || true)"
    echo "  #$i status=$status  output=$content"
  done
  exit 1
fi
SCRIPT
chmod +x /work/pool_smoke.sh
#9exit 0
/work/pool_smoke.sh
Connecting via transaction-mode pooler: aws-0-us-east-1.pooler.supabase.com:6543
POOL OK 20/20
Backend PIDs (multiplexed): 201349 201351 201352

What it said at the end

Script passes cleanly. Here's a summary: **What was created:** `pool_smoke.sh` in the current working directory (`/work`). **How it works:** 1. **Parses** `SUPABASE_DB_URL` to extract the username, host, and database name. 2. **Rebuilds** the connection URL targeting **port 6543** — Supabase's transaction-mode pgBouncer pooler (instead of port 5432 for session-mode). 3. **Uses** `SUPABASE_DB_PASSWORD` from the environment as `PGPASSWORD` — nothing is hardcoded. 4. **Launches 20 parallel** `psql` one-shot queries (`SELECT pg_backend_pid()`), waits for all to finish. 5. **Reports** `POOL OK 20/20` with exit code 0 if all succeeded, or `POOL FAIL` with details and exit code 1. **Proof it's working:** The 20 logical connections multiplexed onto only **3 real backend PIDs** (201349, 201351, 201352), confirming transaction-mode pooling is active.

2 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