CODE WITH GOLF - GolfScript online judge

A GolfScript-only short-coding judge. Solutions are ranked by exact UTF-8 byte size — fewest bytes wins.

Site: https://golfscript.xyz

한국어로 읽기: README.ko.md

Stack

• Next.js (App Router, TypeScript)
• Tailwind CSS — Gemini-style deep-sea dark UI with aurora neon accents
• Supabase (PostgreSQL) — data + Row Level Security
• Piston public API — GolfScript code execution

File Structure

app/        # routes, pages, route handlers, metadata, OG images
components/ # shared UI components
lib/        # domain logic, integrations, utilities
scripts/    # seed/verification/build helpers
sql/        # Supabase schema and seed SQL

Setup

1. Install dependencies

   npm install

2. Configure Supabase

   Copy the env template and fill in your project values:

   cp .env.example .env.local

   Variable	Where	Notes
   NEXT_PUBLIC_SUPABASE_URL	client + server	Project URL
   NEXT_PUBLIC_SUPABASE_ANON_KEY	client	Anon public key
   SUPABASE_SERVICE_ROLE_KEY	server only	Bypasses RLS to read hidden test cases. Never expose this.
   PISTON_API_URL	server	Defaults to https://emkc.org/api/v2/execute

3. Create the schema

   In the Supabase SQL Editor, run sql/schema.sql. It creates the four tables, the leaderboard view, RLS policies, and seed data (3 problems with sample + hidden cases).

4. Run

   npm run dev

Security model

• test_cases has no SELECT RLS policy, so the anon client can never read it.
• The submit API uses the service role client (lib/supabaseAdmin.ts) server-side only to fetch every test case, including hidden ones.
• The API response exposes only { index, hidden, verdict } per case — hidden stdin/stdout are never sent to the browser.

Judging flow (app/api/submit/route.ts)

1. Compute exact UTF-8 byte size of the raw code.
2. Resolve/create the user, verify the problem.
3. Fetch all test cases (server-only).
4. Run each case in parallel on Piston.
5. Compare trimmed stdout → AC / WA; map signals/exit codes → TLE / RE / CE.
6. Aggregate the final verdict, insert into submissions, return the result.