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+# Phase 7: User Access Audit - Context
+
+**Gathered:** 2026-04-07
+**Status:** Ready for planning
+
+<domain>
+## Phase Boundary
+
+Administrators can audit every permission a specific user holds across selected sites, distinguish access types (direct/group/inherited), and export results to CSV or HTML. The audit accepts multiple users via a tenant people picker and uses global site selection (Phase 6) with per-tab override.
+
+Requirements: UACC-01, UACC-02
+
+Success Criteria:
+1. A User Access Audit tab is accessible and accepts a user identifier and site selection as inputs
+2. Running the audit returns a list of all access entries the user holds across the selected sites
+3. Results distinguish between direct role assignments, SharePoint group memberships, and inherited access
+4. Results can be exported to CSV or HTML in the same format established by v1.0 export patterns
+
+</domain>
+
+<decisions>
+## Implementation Decisions
+
+### User Identification Input
+- People picker powered by Microsoft Graph API to show autocomplete dropdown of tenant users
+- Supports selecting multiple users for batch audit
+- Site selection uses global sites (Phase 6) with per-tab override (same pattern as Permissions/Storage tabs)
+- Single "Run Audit" click scans all selected users across all selected sites in one operation
+
+### Results Presentation
+- DataGrid with toggle to switch between group-by-user and group-by-site views
+- Essential columns only: User, Site, Object (list/folder), Permission Level, Access Type (Direct/Group/Inherited), Granted Through
+- Per-user summary banner above the detail grid showing: total accesses, sites count, high-privilege count
+- Search/filter TextBox to filter within audit results by any column
+- Column sorting on all columns
+
+### Access Type Distinction
+- Both color-coded rows AND Access Type column with icons for maximum clarity
+  - Direct assignments: distinct color tint + icon
+  - Group memberships: distinct color tint + icon, plus group name in "Granted Through" column
+  - Inherited access: distinct color tint + icon
+- High-privilege entries (Full Control, Site Collection Admin) flagged with a warning icon/bold styling
+- External/guest users (#EXT#) flagged with a guest badge/icon (reuse existing PermissionEntryHelper.IsExternalUser)
+
+### Export Format — HTML
+- Full interactive HTML with collapsible groups, sortable columns, search filter, color coding (consistent with existing HTML exports)
+- Summary header section with per-user access counts and risk highlights
+- Both group-by-user and group-by-site views available in a single report via toggle/tab
+
+### Export Format — CSV
+- One CSV file per audited user (separate files for sharing individual audit results)
+- Summary section included at top of each file (user, total accesses, sites count, high-privilege count)
+- Flat row structure with all essential columns
+
+### Claude's Discretion
+- Exact color palette for access type row tinting (should be accessible and distinguishable)
+- Icon choices for Direct/Group/Inherited/Warning/External badges
+- Microsoft Graph API scope and authentication integration approach
+- Internal service architecture (new UserAccessAuditService vs extending PermissionsService)
+- DataGrid grouping implementation details (WPF CollectionViewSource or custom)
+- HTML report JavaScript implementation for toggle between views
+- Localization key names for new strings
+
+</decisions>
+
+<code_context>
+## Existing Code Insights
+
+### Reusable Assets
+- `PermissionsService.ScanSiteAsync(ctx, options, progress, ct)` — scans all permissions on a site; audit can filter results by target user(s)
+- `PermissionEntry` record — 9-field flat record with ObjectType, Title, Url, Users, UserLogins, Type, PermissionLevels, GrantedThrough, HasUniquePermissions
+- `PermissionEntryHelper.IsExternalUser(loginName)` — detects #EXT# guest users
+- `PermissionEntryHelper.FilterPermissionLevels(levels)` — removes "Limited Access"
+- `CsvExportService.BuildCsv(entries)` — CSV generation with merge logic (pattern reference)
+- `HtmlExportService` — HTML report generation with embedded JS (pattern reference)
+- `SitePickerDialog` — reusable multi-site picker (already wired from toolbar in Phase 6)
+- `FeatureViewModelBase` — base class with GlobalSites property and OnGlobalSitesChanged hook
+- `SessionManager.GetOrCreateContextAsync(profile, ct)` — authenticated ClientContext provider
+- `WeakReferenceMessenger` — cross-VM messaging for progress updates
+
+### Established Patterns
+- Tab ViewModel extends `FeatureViewModelBase` with `[ObservableProperty]` for bindable state
+- `RunOperationAsync` pattern for long-running operations with progress reporting
+- Export commands as `IAsyncRelayCommand` with `CanExport` predicate
+- Dialog factories as `Func<Window>?` set from code-behind
+- Localization via `TranslationSource.Instance["key"]` with Strings.resx / Strings.fr.resx
+- `_hasLocalSiteOverride` pattern for per-tab site override protection
+
+### Integration Points
+- New tab in `MainWindow.xaml` TabControl
+- New `UserAccessAuditView.xaml` + `UserAccessAuditViewModel.cs` following existing tab pattern
+- New service for user-centric permission querying (filters PermissionEntry by user)
+- New export services for audit-specific CSV and HTML formats
+- DI registration in `App.xaml.cs` for new services and ViewModel
+- Localization keys in `Strings.resx` / `Strings.fr.resx` for audit tab UI
+
+</code_context>
+
+<specifics>
+## Specific Ideas
+
+- The people picker should query Graph API as the admin types, with debounced autocomplete
+- Per-user summary should highlight if a user has Site Collection Admin access (highest risk)
+- The HTML report toggle between "by user" and "by site" should be a simple tab/button in the report header, not requiring page reload
+- CSV files should be named with the user's email for easy identification (e.g., `audit_alice@contoso.com_2026-04-07.csv`)
+
+</specifics>
+
+<deferred>
+## Deferred Ideas
+
+None — discussion stayed within phase scope
+
+</deferred>
+
+---
+
+*Phase: 07-user-access-audit*
+*Context gathered: 2026-04-07*