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+# Draft PR: Tagger Performer Hover Preview Enhancements
+
+## PR Title
+Enhance Tagger performer match UX with hover previews and mismatch warnings
+
+## Base / Head
+- Base: `stashapp/stash` `develop`
+- Head: `Stash-KennyG/stash` `feature/6853-performer-hover-preview`
+
+## Summary
+- Adds a hover preview for matched performer selection in Scene Tagger by attaching the preview to the picker control, not the matched text label.
+- Adds a scraped performer hover preview on the left performer label using scraped/remote data, while rendering through shared performer card UI for visual consistency.
+- Adds mismatch context in the matched performer hover card for non-matching performer fields (including aliases/URLs as counts), to make potential cross-linkage easier to spot before save.
+- Adds stash ID conflict warning inside the hover card when the local selected performer already has a stash ID for the same endpoint but with a different GUID.
+- Uses a compact red endpoint chip for stash ID conflict warning, with full conflicting GUID available via chip tooltip.
+
+## Files Changed
+- `ui/v2.5/src/components/Performers/PerformerPopover.tsx`
+- `ui/v2.5/src/components/Tagger/scenes/MatchedPerformerPreview.tsx`
+- `ui/v2.5/src/components/Tagger/scenes/PerformerResult.tsx`
+- `ui/v2.5/src/components/Tagger/scenes/ScrapedPerformerPreview.tsx` (new)
+- `ui/v2.5/src/components/Tagger/styles.scss`
+
+## Behavior Details
+- **Picker hover target**: hover card now opens from the selected picker chip/control.
+- **Left-side scraped hover**: hover on scraped performer text shows card built from scraped data (image/name/etc.) but styled with shared `PerformerCard`.
+- **Mismatch rows**: shown only for fields where scraped has a value and differs from selected local value.
+- **Aliases / URLs**: reported as counts only.
+- **Stash ID conflict warning**:
+  - shown only when `selected stash_id(endpoint) != incoming remote_site_id`
+  - displayed inside card, above mismatch rows
+  - compact red endpoint chip; GUID is tooltip text.
+
+## Mismatch Fields Included
+- Birthdate
+- Death Date
+- Ethnicity
+- Hair Color
+- Eye Color
+- Height
+- Weight
+- Penis Length
+- Circumcised
+- Measurements
+- Fake Tits
+- Tattoos
+- Piercings
+- Career Start
+- Career End
+- Aliases (count)
+- URLs (count)
+
+## Test Plan
+- [ ] Hover selected performer picker in Scene Tagger matched result and confirm card opens below picker.
+- [ ] Hover left scraped performer name and confirm scraped preview card appears and matches shared performer card styling.
+- [ ] Confirm mismatch rows render only for differing values and are hidden for exact matches.
+- [ ] Confirm aliases/URLs mismatch rows show count only.
+- [ ] Confirm stash ID warning appears only when endpoint matches and GUID differs.
+- [ ] Confirm warning chip is compact red endpoint chip and GUID is visible in tooltip.
+- [ ] Confirm no stash ID warning appears when GUIDs match.
+- [ ] Confirm no regressions in create/skip/select/link flow for performer rows.
+- [ ] Confirm lint/build checks pass.
+
+## Notes
+- This feature is designed to improve confidence in match correctness before save, especially in larger datasets where name collisions are more common.
+
+## Compatibility Note: CSS Class Shape
+- `PerformerPopover` now supports an optional `cardClassName` prop and applies it by appending to the existing wrapper class:
+  - before: `className="tag-popover-card"`
+  - after: `className={\`tag-popover-card ${cardClassName ?? ""}\`.trim()}`
+- The base class `tag-popover-card` is preserved, so existing styling and selectors that target it continue to work.
+- This is expected to be low-risk for downstream usage because:
+  - the prop is optional
+  - existing callers do not need to change
+  - DOM structure is unchanged (same wrapper element).