# Task Log - Multi-Tenancy Audit

**Date:** 2025-11-21
**Task:** Audit LightRAG multi-tenancy and provide an action plan.

## Actions
- Analyzed `docs/0001-multi-tenant-architecture.md` to understand the current design.
- Audited `lightrag/api/dependencies.py` and `lightrag/api/lightrag_server.py` for tenant identification and middleware.
- Audited `lightrag/kg/postgres_tenant_support.py`, `mongo_tenant_support.py`, `redis_tenant_support.py`, and `graph_tenant_support.py` for data isolation mechanisms.
- Created `docs/action_plan/01-audit-report.md` detailing gaps and risks.
- Created `docs/action_plan/02-implementation-plan.md` with a step-by-step guide to fix the issues.

## Decisions
- Identified that the current implementation relies on "application-level" isolation (helper classes) rather than "database-level" enforcement (RLS, strict wrappers).
- Recommended adopting the "battle-tested" approach: Subdomains + JWT, PostgreSQL RLS, and strict repository/session wrappers.

## Next Steps
- Execute the implementation plan starting with Phase 1 (Middleware).
- Enable RLS on PostgreSQL tables.
- Refactor MongoDB and Neo4j access patterns.

## Lessons/Insights
- "Battle-tested" multi-tenancy requires defense-in-depth. Relying on developers to manually add filters is prone to error.
- PostgreSQL RLS is a powerful feature that should be leveraged for hard isolation.