- Supersedes ADR-002 which fundamentally misunderstood MCP protocol constraints
- Introduces "Sign-in with Nextcloud" architecture pattern
- MCP server becomes OAuth client to enable offline/background operations
- Implements full token rotation with reuse detection for security
- Includes comprehensive implementation details and migration strategy
Key architectural shift:
- From: Pass-through authentication (stateless, no offline access)
- To: MCP server as OAuth client (stateful, full offline capabilities)
The solution enables background workers to operate independently of MCP
sessions by storing and rotating refresh tokens securely.
🤖 Generated with Claude Code
Co-Authored-By: Claude <noreply@anthropic.com>
