AI-Studio/documentation/compatibility-shims/2026-07-chat-data-source-options.md

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# Chat Data Source Options
- Status: Active
- Introduced: 2026-07-05
- Remove after: 2027-01-05
- Code references:
- `app/MindWork AI Studio/Settings/DataModel/DataChat.cs`
## User Impact
Older settings files store default chat data source options in the nested `DataChat.PreselectedDataSourceOptions` object.
Without this shim, those defaults would be lost after upgrading to a version that exposes the individual data source default fields to configuration plugins.
## Compatibility Behavior
`DataChat.PreselectedDataSourceOptions` remains available as a compatibility property. Reading it maps the new individual fields into a `DataSourceOptions` object, and setting it copies values from the legacy nested object into the new fields.
This lets older settings files load without a settings version migration and keeps existing UI bindings working while configuration plugins manage the individual fields.
## Removal Checklist
- Confirm supported settings files are expected to contain `PreselectedDataSourcesDisabled`, `PreselectedDataSourcesAutomaticSelection`, `PreselectedDataSourcesAutomaticValidation`, and `PreselectedDataSourceIds`.
- Remove `DataChat.PreselectedDataSourceOptions`.
- Update any remaining callers to use the individual fields or a dedicated helper.
- Update this document's status to `Removed`.