src/supabase.ts

import { createClient, SupabaseClient } from '@supabase/supabase-js';

// Database coupling to global SIN-Supabase A2A (Oracle OCI VM 200GB)
// SSOT: https://docs.google.com/document/d/1RtoHn4I0GntuEEOHHkqoh_dMuGzgMwQz7_8oxAOpQbw/edit?tab=t.zglvro7czbod

let supabaseInstance: SupabaseClient | null = null;

export function getSupabaseClient(): SupabaseClient {
  if (supabaseInstance) {
    return supabaseInstance;
  }

  const supabaseUrl = process.env.SIN_SUPABASE_URL;
  const supabaseKey = process.env.SIN_SUPABASE_SERVICE_ROLE_KEY;

  if (!supabaseUrl || !supabaseKey) {
    throw new Error('missing_supabase_credentials');
  }

  supabaseInstance = createClient(supabaseUrl, supabaseKey);
  return supabaseInstance;
}