Issue #248 required three iterations to solve due to n8n API version differences:
1. First attempt: Whitelist filtering
- Failed: API rejects ANY settings properties via update endpoint
2. Second attempt: Complete settings removal
- Failed: Cloud API requires settings property to exist
3. Final solution: Unconditional empty settings object
- Success: Satisfies both API requirements
Changes:
- src/services/n8n-validation.ts:153
- Changed from conditional `if (cleanedWorkflow.settings)` to unconditional
- Always sets `cleanedWorkflow.settings = {}`
- Works for both cloud (requires property) and self-hosted (rejects properties)
- tests/unit/services/n8n-validation.test.ts
- Updated all 4 tests to expect `settings: {}` instead of removed settings
- Tests verify empty object approach works for all scenarios
Tested:
- ✅ localhost workflow (wwTodXf1jbUy3Ja5)
- ✅ cloud workflow (n8n.estyl.team/workflow/WKFeCRUjTeYbYhTf)
- ✅ All 72 unit tests passing
References:
- https://community.n8n.io/t/api-workflow-update-endpoint-doesnt-support-setting-callerpolicy/161916
- Tested with @agent-n8n-mcp-tester on production workflows
