Claude Code's marketplace schema does not support custom fields.
The `integrates_with` field on data-platform and viz-platform caused:
"Invalid schema: plugins.9: Unrecognized key: integrates_with"
This reverts the schema extension while keeping the validate_workflow_integration
MCP tool functional (it reads from plugin.json files directly, not marketplace.json).
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
