# Task Log: WebUI Single-Tenant/Multi-Tenant Mode Support

**Date**: 2025-01-06 09:30
**Mode**: Beastmode

## Summary

Implemented single-tenant and multi-tenant mode support for the LightRAG WebUI to ensure it works correctly in both configurations.

## Actions Performed

1. **Added `LIGHTRAG_MULTI_TENANT` env var** to `lightrag/api/lightrag_server.py` to control multi-tenant mode
2. **Updated `/auth-status` and `/health` endpoints** to include `multi_tenant_enabled` flag
3. **Updated `LoginPage.tsx`** to auto-redirect in single-tenant mode (bypass tenant selection)
4. **Updated `App.tsx`** to set default tenant AND KB in single-tenant mode
5. **Updated `TenantSelector.tsx`** to skip API calls when `multiTenantEnabled=false`
6. **Updated `SiteHeader.tsx`** to conditionally hide tenant selector in single-tenant mode
7. **Updated `useTenantInitialization.ts`** hook to skip tenant API calls in single-tenant mode
8. **Updated `AuthStore`** in `stores/state.ts` with `multiTenantEnabled` state and `setMultiTenantEnabled` action
9. **Updated `lightrag.ts`** API types to include `multi_tenant_enabled` in `AuthStatusResponse`
10. **Rebuilt WebUI** multiple times during development

## Key Decisions

1. **Default mode is single-tenant** (`LIGHTRAG_MULTI_TENANT=false`) for backward compatibility
2. **Default tenant/KB IDs are "default"** to match API expectations
3. **Auto-set both tenant AND KB** in single-tenant mode to avoid "KB context required" errors
4. **Multi-tenant mode requires separate tenant API routes** to be configured (not fully implemented in current codebase)

## Test Results

### Single-Tenant Mode (Default)
- ✅ WebUI loads without errors
- ✅ Auto-login with free login mode
- ✅ Documents tab works (shows empty state)
- ✅ Knowledge Graph tab works (shows empty graph)
- ✅ Retrieval tab works with query parameters
- ✅ API tab loads Swagger UI (404 for docs endpoints expected)
- ✅ No tenant selection UI shown
- ✅ No 404 errors for tenant/KB API calls

### Multi-Tenant Mode
- ⚠️ Requires tenant API routes to be configured
- ⚠️ Shows 404 errors for `/api/v1/tenants` endpoint
- ℹ️ Needs TenantService and tenant routes to be included in API server

## Files Modified

- `lightrag/api/lightrag_server.py`
- `lightrag_webui/src/App.tsx`
- `lightrag_webui/src/features/LoginPage.tsx`
- `lightrag_webui/src/features/SiteHeader.tsx`
- `lightrag_webui/src/components/TenantSelector.tsx`
- `lightrag_webui/src/hooks/useTenantInitialization.ts`
- `lightrag_webui/src/stores/state.ts`
- `lightrag_webui/src/api/lightrag.ts`

## Next Steps

1. To enable full multi-tenant support:
   - Include tenant routes in API server when `LIGHTRAG_MULTI_TENANT=true`
   - Set up tenant/KB tables in PostgreSQL
   - Create default tenant and KB during initialization
   - Test tenant CRUD operations

2. Consider adding:
   - Tenant creation UI in WebUI
   - KB creation UI in WebUI
   - Tenant switching without page reload

## Lessons Learned

1. The env var name is `LIGHTRAG_MULTI_TENANT`, not `ENABLE_MULTI_TENANT` or `ENABLE_MULTI_TENANTS`
2. Both tenant AND KB context must be set for document/graph API calls to work
3. The WebUI uses localStorage to persist tenant/KB selection - must clear for fresh testing
4. React strict mode causes double initialization - need refs to prevent duplicate API calls