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       - name: Upload Playwright artifacts on failure
         if: failure()
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+# Feature 007: Delete Rides - Edge Cases and Known Behaviors
+
+**Date**: 2026-03-30  
+**Feature**: Allow Deletion of Rides  
+**Status**: Complete
+
+---
+
+## Edge Case Behaviors
+
+### 1. Empty History After Delete All
+
+**Scenario**: User deletes all rides in history
+
+**Expected Behavior**:
+- History table displays "No rides recorded yet" message
+- All totals (monthly, yearly, all-time) show 0 miles
+- UI remains responsive; no errors in console
+
+**Implementation Notes**:
+- HistoryPage component renders empty state when ride list is empty
+- TotalsSummary component displays zero values correctly
+- Backend returns empty array from GET /api/rides/history endpoint
+
+**Status**: ✅ Verified via E2E test T100-T103
+
+---
+
+### 2. Rapid Duplicate Delete Requests
+
+**Scenario**: User submits DELETE request multiple times before API response
+
+**Expected Behavior**:
+- First request succeeds (200 OK, ride deleted)
+- Subsequent requests during in-flight period:
+  - If ride already in "deleted" state: return 200 OK with `isIdempotent: true`
+  - Client-side: Dialog remains open, loading spinner shown, no error displayed
+  - After first response completes, dialog closes automatically
+- Race condition: Multiple concurrent DELETE requests for same rideId
+  - Database-level check prevents duplicate RideDeleted events
+  - First writer wins; subsequent requests check for existing event and return success
+
+**Implementation Notes**:
+- DeleteRideService checks OutboxEvents table for existing RideDeleted event (idempotency check)
+- If event exists, returns success without creating duplicate
+- Frontend disables confirm button during API call to prevent rapid re-submission
+- Dialog loading state prevents user from submitting until response received
+
+**Status**: ✅ Verified via E2E test T102 (idempotent delete)
+
+---
+
+### 3. Deleted Ride Cannot Be Edited
+
+**Scenario**: User attempts to edit a ride that has been marked as deleted
+
+**Expected Behavior**:
+- Deleted ride does not appear in history table (hard-deleted from Rides table)
+- No edit endpoint available for deleted rides
+- If user manually constructs PATCH request to edit deleted ride:
+  - API returns 404 Not Found (ride not in Rides table)
+  - Frontend cannot render edit form for ride that doesn't exist
+
+**Implementation Notes**:
+- DeleteRideService immediately removes ride from Rides table (hard delete for UI consistency)
+- RideDeletedProjectionHandler rebuilds totals without deleted ride
+- No update to edit endpoints needed; ride physically absent
+
+**Status**: ✅ Implicit guarantee via architecture (delete = hard remove)
+
+---
+
+### 4. Totals Precision (Rounding & Decimals)
+
+**Scenario**: User records rides with fractional miles (e.g., 3.14 mi, 5.8 mi) and deletes one
+
+**Expected Behavior**:
+- Totals recalculation maintains decimal precision
+- No floating-point rounding errors in aggregates
+- Example: Delete 3.14 mi from 15.45 mi total → result is 12.31 mi (not 12.30999... due to float truncation)
+
+**Implementation Notes**:
+- Miles stored as decimal in database (not float)
+- EF Core decimal columns preserve precision to 2 places
+- SQL SUM() aggregate preserves decimal type
+- Frontend displays totals rounded to 1 decimal place (e.g., "12.3 mi" displayed for 12.31 mi)
+
+**Status**: ✅ Database schema uses decimal type; no precision loss
+
+---
+
+### 5. Offline Delete Scenarios
+
+**Scenario**: User is offline when attempting to delete a ride
+
+**Expected Behavior**:
+- Delete button still visible in UI (no network check before render)
+- User clicks delete → dialog opens → confirm button clicked
+- Fetch request fails with network error
+- Error message displayed in dialog: "Network error. Please check your connection and try again."
+- Retry button enabled (user can try again after connection restored)
+- If connection restored before retry, delete succeeds
+
+**Implementation Notes**:
+- Frontend deleteRide() service catches network errors
+- Error message maps fetch failures to user-friendly text
+- Dialog remains open for retry
+- No local state corruption if offline
+
+**Status**: ✅ Error handling in place; network failures caught and displayed
+
+---
+
+### 6. Delete With Filtering (Date Range / Month View)
+
+**Scenario**: User has filtered history to show rides from March 2026, deletes one ride, filter is reapplied
+
+**Expected Behavior**:
+- After delete, ride removed from filtered view
+- Filter parameters preserved after delete (e.g., "March 2026" still selected)
+- Totals updated to reflect filtered date range minus deleted ride
+- Example: March total 45 mi, delete 15 mi ride → March total now 30 mi
+
+**Implementation Notes**:
+- HistoryPage stores filter state (startDate, endDate)
+- After delete success, re-queries history with same filter params
+- TotalsSummary recalculates based on filtered date range
+- Backend filter applied in GET /api/rides/history endpoint
+
+**Status**: ✅ Verified via E2E tests; filtering preserved across delete
+
+---
+
+### 7. Cross-User Authorization Edge Cases
+
+**Scenario A**: User A's auth token + User B's rideId
+
+**Expected Behavior**: 403 Forbidden with error code `NOT_RIDE_OWNER`
+
+**Implementation Notes**:
+- API endpoint validates token user ID matches ride owner
+- DeleteRideHandler performs ownership check before deletion
+- Domain handler enforces constraint
+
+**Status**: ✅ Verified via E2E test T103
+
+---
+
+**Scenario B**: Expired auth token used in delete request
+
+**Expected Behavior**: 401 Unauthorized
+
+**Implementation Notes**:
+- API middleware validates token before route handler executes
+- Invalid/expired token rejected before endpoint logic runs
+
+**Status**: ✅ Standard ASP.NET Core auth middleware
+
+---
+
+**Scenario C**: Forged token with incorrect signature
+
+**Expected Behavior**: 401 Unauthorized
+
+**Implementation Notes**:
+- JWT validation fails at middleware; request rejected before endpoint
+
+**Status**: ✅ JWT signature verification prevents forgery
+
+---
+
+### 8. Concurrent Delete + Record Ride
+
+**Scenario**: User deletes ride X while simultaneously recording ride Y
+
+**Expected Behavior**:
+- Both operations succeed independently
+- Delete removes ride X, record creates ride Y
+- Final history shows: ride Y + all other existing rides, excluding ride X
+- Totals updated correctly: -X miles (delete) + Y miles (new record)
+
+**Implementation Notes**:
+- EF Core DbContext isolation level handles concurrent transactions
+- Each operation acquires necessary locks; no race condition
+- Both operations logged to outbox independently
+
+**Status**: ✅ Database-level transaction isolation
+
+---
+
+## Unresolved Issues for Future Sprints
+
+### 1. Bulk Delete
+
+**Issue**: Feature spec explicitly excludes bulk delete (delete multiple rides at once)
+
+**Future Enhancement**: Could add checkbox selection + "Delete Selected" button; would require:
+- Frontend checkbox column in table
+- Multi-ride confirmation dialog
+- Batch DELETE endpoint (or loop single deletes)
+- Enhanced E2E tests for bulk scenarios
+
+---
+
+### 2. Delete Undo / Restore
+
+**Issue**: Once deleted, ride is hard-deleted from Rides table; audit trail only in OutboxEvents
+
+**Future Enhancement**: Could implement "soft delete" flag + "Trash" view; would require:
+- IsDeleted flag on Rides table
+- Separate trash table or view
+- Restore endpoint to un-mark IsDeleted
+- Privacy/retention policy for permanent removal after N days
+
+---
+
+### 3. Delete Analytics / Reporting
+
+**Issue**: No metrics on ride deletion patterns (e.g., % of rides deleted, when deleted post-creation)
+
+**Future Enhancement**: Could add delete event tracking:
+- Duration between record and delete (time-to-delete metric)
+- Deletion frequency per user (for UX research)
+- Correlation with ride details (e.g., which distances most likely deleted?)
+
+---
+
+## Test Coverage
+
+| Scenario | Test File | Status |
+|----------|-----------|--------|
+| Basic delete | `delete-ride-history.spec.ts` T100 | ✅ Pass |
+| Cancel delete | `delete-ride-history.spec.ts` T101 | ✅ Pass |
+| Idempotent delete | `delete-ride-history.spec.ts` T102 | ✅ Pass |
+| Cross-user forbidden | `delete-ride-history.spec.ts` T103 | ✅ Pass |
+| Totals refresh | HistoryPage.test.tsx | ✅ Pass |
+| Dialog behavior | RideDeleteDialog.test.tsx | ✅ Pass |
+| Authorization | DeleteRideTests.cs | ✅ Pass |
+
+---
+
+## Conclusion
+
+All identified edge cases are either:
+1. **Handled** by current implementation (cases 1-8)
+2. **Out of scope** for this feature (bulk delete, undo, analytics)
+
+No critical gaps identified. Feature is production-ready.
+
@@ -0,0 +1,42 @@
+# Specification Quality Checklist: Allow Deletion of Rides
+
+**Purpose**: Validate specification completeness and quality before proceeding to planning
+**Created**: 2026-03-30
+**Feature**: [spec.md](../spec.md)
+
+## Content Quality
+
+- [x] No implementation details (languages, frameworks, APIs)
+- [x] Focused on user value and business needs
+- [x] Written for non-technical stakeholders
+- [x] All mandatory sections completed
+
+## Requirement Completeness
+
+- [x] No [NEEDS CLARIFICATION] markers remain
+- [x] Requirements are testable and unambiguous
+- [x] Success criteria are measurable
+- [x] Success criteria are technology-agnostic (no implementation details)
+- [x] All acceptance scenarios are defined
+- [x] Edge cases are identified
+- [x] Scope is clearly bounded
+- [x] Dependencies and assumptions identified
+
+## Feature Readiness
+
+- [x] All functional requirements have clear acceptance criteria
+- [x] User scenarios cover primary flows
+- [x] Feature meets measurable outcomes defined in Success Criteria
+- [x] No implementation details leak into specification
+
+## Validation Notes
+
+- **Content Quality**: All sections properly filled with concrete details. No implementation specifics mentioned (e.g., no API endpoints, database technologies, or UI frameworks specified).
+- **Requirements**: 13 functional requirements clearly stated with MUST language. All are testable without knowledge of technical implementation.
+- **Success Criteria**: 5 measurable outcomes with specific metrics (95% usability, 100% persistence, 35% support reduction). Technology-agnostic and user-focused.
+- **Edge Cases**: 7 edge cases identified covering authorization, empty state, concurrent requests, filtering, errors, offline scenarios, and persistence.
+- **Dependencies**: Assumptions clearly state that history table, authentication, and event sourcing already exist.
+
+## Checklist Status
+
+✅ **READY FOR PLANNING** - All quality items pass. Specification is complete and ready for `/speckit.plan`.