What problem does it solve? Multi-tenant Supabase applications risk cross-tenant data leaks, missing Row Level Security, exposed service-role keys, and unsafe privileged writes. This Skill provides a structured expert review of runtime persistence and access behavior so these issues are caught before they reach production. ## Core Features & Use Cases - RLS and Tenant Isolation Review: Verifies Row Level Security is enabled, policies enforce organization and project scoping, and no IDOR or cross-tenant reads/writes exist. - Privileged Access Safety: Checks that service-role keys never appear in client bundles or untrusted contexts and that mutations flow through authenticated server paths. - Transaction and Idempotency Analysis: Evaluates multi-row writes for atomicity, retry safety, conflict handling, and honest labeling of best-effort side effects. - Use Case: Before merging a pull request that adds a new API route writing to a projects table, run this review to confirm the route validates auth, filters by project_id, respects RLS policies, and classifies the table's authority correctly. ## Quick Start Review my Supabase API routes and RLS policies for tenant isolation and service-role safety issues.