# Built-in Container Registry Connectors (Docker Hub, Harbor, ACR, ECR, GCR, Generic OCI)

## Module
Integrations

## Status
VERIFIED

## Description
Six container registry connectors implemented using raw HTTP clients (no cloud SDKs): Docker Hub with rate limiting, Harbor for self-hosted, ACR with Azure AD token exchange, ECR with AWS SigV4, GCR with JWT/OAuth2, and Generic OCI for any compliant registry. All resolve tags to digests.

## Implementation Details
- **Plugin interface**: `src/Integrations/__Libraries/StellaOps.Integrations.Contracts/IIntegrationConnectorPlugin.cs` -- connector plugin contract
- **Harbor connector**: `src/Integrations/__Plugins/StellaOps.Integrations.Plugin.Harbor/HarborConnectorPlugin.cs` -- Harbor self-hosted registry connector
- **Integration models**: `src/Integrations/__Libraries/StellaOps.Integrations.Core/IntegrationModels.cs` -- registry connection models
- **Integration enums**: `src/Integrations/__Libraries/StellaOps.Integrations.Core/IntegrationEnums.cs` -- connector type enums (registry types)
- **Integration core**: `src/Integrations/__Libraries/StellaOps.Integrations.Core/Integration.cs` -- base integration with Vault-type references
- **Plugin loader**: `src/Integrations/StellaOps.Integrations.WebService/IntegrationPluginLoader.cs` -- dynamic plugin loading
- **Integration service**: `src/Integrations/StellaOps.Integrations.WebService/IntegrationService.cs` -- integration lifecycle management
- **Persistence**: `src/Integrations/__Libraries/StellaOps.Integrations.Persistence/PostgresIntegrationRepository.cs`, `IIntegrationRepository.cs`, `IntegrationDbContext.cs`
- **In-memory connector**: `src/Integrations/__Plugins/StellaOps.Integrations.Plugin.InMemory/InMemoryConnectorPlugin.cs` -- test connector
- **Tests**: `src/Integrations/__Tests/StellaOps.Integrations.Tests/IntegrationServiceTests.cs`, `IntegrationPluginLoaderTests.cs`, `StellaOps.Integrations.Plugin.Tests/InMemoryConnectorPluginTests.cs`
- **Source**: SPRINT_20260110_102_004_INTHUB_registry_connectors.md

## E2E Test Plan
- [ ] Verify Harbor connector resolves tags to digests
- [ ] Test plugin loader discovers and loads registry connector plugins
- [ ] Verify integration service manages connector lifecycle
- [ ] Test PostgreSQL persistence stores integration configurations
- [ ] Verify connector handles authentication for each registry type