AI コーディングツールで作ったアプリの守り方

grep -RIn 'NEXT_PUBLIC_SUPABASE_SERVICE' src/
grep -RIn 'sk_live_\|pk_live_\|STRIPE_SECRET' src/
grep -RIn 'sk-ant-\|^sk-' src/  # Anthropic / OpenAI
grep -RIn 'AIza\|AKIA' src/        # Google / AWS
grep -RIn 'eyJh[A-Za-z0-9_-]\{20,\}' src/  # JWT-shaped strings

# Supabase migrations
grep -RIn 'CREATE TABLE public\.' supabase/migrations/
grep -RIn 'ENABLE ROW LEVEL SECURITY\|FORCE ROW LEVEL SECURITY' supabase/migrations/

# Firebase / Firestore
cat firestore.rules  # confirm no `if true;` matches

grep -RIn 'getSession()' src/   # should be getUser() server-side
grep -RIn 'localStorage\.\(set\|get\)Item.*token' src/
grep -RIn 'jwt.verify.*\(noVerify\|skipVerify\)' src/

# Confirm middleware location for src/ layouts
ls src/middleware.ts middleware.ts 2>&1

# Look for CSP and security headers
grep -RIn 'Content-Security-Policy\|Strict-Transport-Security' src/

// src/middleware.ts
import { NextResponse, type NextRequest } from 'next/server';

export function middleware(request: NextRequest) {
  const nonce = crypto.randomUUID().replace(/-/g, '');
  const csp = [
    `script-src 'nonce-${nonce}' 'strict-dynamic'`,
    `style-src 'self' 'unsafe-inline'`,
    `img-src 'self' data: https:`,
    `connect-src 'self' https://*.supabase.co`,
    `object-src 'none'`,
    `base-uri 'self'`,
    `frame-ancestors 'none'`,
  ].join('; ');

  const requestHeaders = new Headers(request.headers);
  requestHeaders.set('x-nonce', nonce);

  const response = NextResponse.next({ request: { headers: requestHeaders } });
  response.headers.set('Content-Security-Policy', csp);
  response.headers.set('X-Content-Type-Options', 'nosniff');
  response.headers.set('Strict-Transport-Security', 'max-age=31536000; includeSubDomains');
  return response;
}

export const config = {
  matcher: ['/((?!_next/static|_next/image|favicon.ico).*)'],
};

-- supabase/migrations/XXXX_rls.sql
alter table public.profiles enable row level security;
alter table public.profiles force row level security;

create policy "profiles: read own"
  on public.profiles for select
  using (auth.uid() = id);

create policy "profiles: update own"
  on public.profiles for update
  using (auth.uid() = id)
  with check (auth.uid() = id);

// src/app/api/items/route.ts
import { NextResponse, type NextRequest } from 'next/server';
import { createClient } from '@/lib/supabase/server';

export async function POST(request: NextRequest) {
  const supabase = await createClient();
  const { data: { user } } = await supabase.auth.getUser();
  if (!user) return NextResponse.json({ error: 'unauthorized' }, { status: 401 });

  const body = await request.json();
  const { data, error } = await supabase
    .from('items')
    .insert({ ...body, user_id: user.id })  // server-supplied, not from body
    .select()
    .single();

  if (error) return NextResponse.json({ error: error.message }, { status: 400 });
  return NextResponse.json(data);
}

// src/app/api/posthog/[...path]/route.ts
import { type NextRequest } from 'next/server';

const UPSTREAM = 'https://us.i.posthog.com';

export async function POST(req: NextRequest, { params }: { params: Promise<{ path: string[] }> }) {
  const { path } = await params;
  const url = `${UPSTREAM}/${path.join('/')}`;
  return fetch(url, {
    method: 'POST',
    headers: { 'content-type': req.headers.get('content-type') ?? 'application/json' },
    body: await req.text(),
  });
}

function safeNext(raw: string | null): string {
  if (!raw) return '/dashboard';
  if (!raw.startsWith('/') || raw.startsWith('//')) return '/dashboard';
  return raw;
}

# Or from CI, via the REST API:
curl -X POST https://fixvibe.app/api/v1/scans \
  -H "authorization: Bearer $FIXVIBE_TOKEN" \
  -H "content-type: application/json" \
  -d '{"target":"https://your-app.com"}'