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name: draconian_rls_audit description: Default-Deny security posture for Supabase. Mandates strict RLS and 'WITH CHECK' clauses. allowed-tools: Read, Edit, Write

Draconian RLS Audit Protocol

1. Zero Trust (Default-Deny)

• Mandate: Every Table MUST have RLS enabled.
• Policy: The default state of any table should be NO ACCESS. Access is granted explicitly via Policy.
• Detector: Run SELECT ... WHERE rowsecurity = false to hunt down naked tables.

2. The "WITH CHECK" Imperative

• Vulnerability: An INSERT or UPDATE policy without WITH CHECK allows users to write data they cannot read, or worse, escalate privileges (e.g., "Give myself admin role").
• Rule: ALL modification policies MUST have a WITH CHECK clause matching the USING clause (or stricter).

3. Client-Side Key Ban

• Strict Rule: The string service_role MUST NOT exist in any file within src/.
• Enforcement: Grep for it. If found, STOP and warn the user.

4. Explicit auth.uid() Binding

• Rule: Policies should almost always bind to auth.uid().
• Ban: Never hardcode UUIDs or email addresses in SQL policies.

5. Audit Checklist

• RLS enabled?
• Default policy is DENY?
• WITH CHECK present on writes?
• No service_role in client code?