---
verdict: pass
remediation_round: 0
---

# Milestone Validation: M002

## Success Criteria Checklist
## Success Criteria Checklist

- [x] **Import & Convert view (View 1) built** — S01 delivered FileUpload (drag-and-drop + click fallback), PresetSelector (engine API integration), ParameterSliders (mode-aware controls), SvgPreview (responsive SVG rendering), OutputInfoBar (color-coded stats), and Use This button. 23 unit tests pass.
- [x] **Engine API integration with live preview** — S01 built typed API client (getPresets, traceImage, simplifyVector) with AbortSignal support. useDebouncedTrace hook handles debounced re-trace with abort cancellation. 7 hook tests verify debounce, abort, and SVG routing.
- [x] **Design Canvas (View 2) with Konva.js** — S02 delivered KonvaStage rendering artboard backgrounds, all canvas object types, Transformer for selection handles, and rubber-band multi-select. DesignCanvas view container wired with ResizeObserver-driven sizing.
- [x] **Artboard shapes** — S02 built artboardShapes.ts with shield/pennant SVG path generators, 6 shape presets (rect, square, circle, oval, shield, pennant), unit conversion utilities, and ArtboardSetup modal. 15 artboard tests pass.
- [x] **Basic shapes (rect, circle, ellipse, line)** — S02 implemented 4 shape creation tools with click-to-place, drag/transform handling, and properties editing. Shape tools accessible from CanvasToolbar.
- [x] **Text objects** — S03 added TextObject to CanvasObject discriminated union with text-specific fields. Text tool in toolbar, text rendering via Konva Text, text property controls (content, font family, size, letter spacing, line height, fill, stroke).
- [x] **Font loading and text-to-path conversion** — S03 built fontService with opentype.js v1.3.4: loadFont, loadFontByFamily, textToPathData, getAvailableFonts, clearFontCache. 3 bundled OFL Google Fonts. Y-axis flip and manual per-character glyph positioning for letter spacing. 24 fontService tests pass.
- [x] **Layers/ObjectPanel** — S02 built ObjectPanel with reverse z-order list, drag reorder, visibility toggle, lock toggle, rename (double-click). Objects listed frontmost-on-top matching standard design tool UX.
- [x] **Alignment tools** — S02 built 9 pure alignment/distribute functions in alignment.ts and AlignmentBar component (6 align + 2 distribute + center-on-artboard). 13 alignment tests pass.
- [x] **Undo/redo** — S02 implemented useCanvasState with useReducer+useRef pattern, history capped at 50. Ctrl+Z undo, Ctrl+Shift+Z redo. Select/deselect excluded from undo stack. Toolbar buttons reflect stack state. 8 undo/redo tests pass.
- [x] **View 1 → View 2 data flow** — S01 established ViewState routing in App.tsx. S02 wired DesignCanvas to receive real svgData/traceMetadata props from View 1 via onUseThis callback. SVG import auto-scales to fit artboard.
- [x] **All tests pass** — 95/95 tests pass across 7 test files (vitest run, exit 0).
- [x] **Zero TypeScript errors** — tsc --noEmit passes with strict mode, noUnusedLocals, noUnusedParameters (exit 0).

## Slice Delivery Audit
## Slice Delivery Audit

| Slice | Claimed Deliverable | Delivered? | Evidence |
|-------|-------------------|------------|----------|
| S01: Import & Convert UI | Upload PNG, live preview with preset selection + slider controls, Use This to advance | ✅ Yes | FileUpload, PresetSelector, ParameterSliders, SvgPreview, OutputInfoBar, Use This button all built and wired. 23 tests pass. All 18 key files exist. API client with AbortSignal, useDebouncedTrace hook with debounce+abort. |
| S02: Design Canvas Core | Create artboards in each shape, add/move/resize shapes, multi-select with alignment, undo/redo | ✅ Yes | ArtboardSetup with 6 shapes, KonvaStage with rect/circle/ellipse/line tools, Transformer + rubber-band selection, ObjectPanel with z-order/visibility/lock, AlignmentBar with 9 functions, useCanvasState with undo/redo. 48 new tests (71 total). |
| S03: Text System + Font Loading | Add text objects, font picker, size/spacing controls, convert to paths | ✅ Yes | TextObject in discriminated union, text tool in toolbar, fontService with opentype.js, 3 bundled fonts, text property controls, Convert to Paths button with confirmation dialog. 24 fontService tests (95 total). |

All three slices delivered their claimed outputs. No gaps between demo claims and actual deliverables.

## Cross-Slice Integration
## Cross-Slice Integration

### S01 → S02 Boundary
- **S01 provides:** ViewState routing in App.tsx, onUseThis callback passing SVG string + TraceMetadata, typed API client, TypeScript interfaces for engine types
- **S02 consumes:** svgData and traceMetadata props in DesignCanvas, ViewState 'canvas' rendering
- **Status:** ✅ Aligned — S02 summary confirms "wired into App.tsx to receive real svgData/traceMetadata props from View 1". App.tsx correctly passes props after ViewState transitions.

### S02 → S03 Boundary
- **S02 provides:** CanvasObject discriminated union (types/canvas.ts), KonvaStage rendering pipeline, ShapeProperties component, CanvasToolbar, ObjectPanel, AlignmentBar, useCanvasState hook
- **S03 consumes:** Extends CanvasObject union with TextObject type, adds cases in all 6 switch statements (KonvaStage, CanvasToolbar, ObjectPanel, ShapeProperties, AlignmentBar, DesignCanvas)
- **Status:** ✅ Aligned — S03 summary confirms exhaustive switch coverage under strict TypeScript mode. P012 pattern documents the 6-file update requirement. TypeScript compilation with zero errors validates all cases are handled.

### No Boundary Mismatches
All produces/consumes relationships documented in slice summaries match what was actually built. The discriminated union pattern (D007/D008) provided a compile-time guarantee that cross-slice type extensions are complete.

## Requirement Coverage
## Requirement Coverage

No formal requirements (REQUIREMENTS.md) exist for this project. The project uses milestone vision and slice demo statements as the specification.

All elements from the M002 vision are covered by at least one slice:
- Import & Convert view → S01
- Engine API integration with live preview → S01
- Konva.js design canvas → S02
- Artboard shapes → S02
- Basic shapes (rect/circle/ellipse/line) → S02
- Text objects → S03
- Font loading → S03
- Text-to-path conversion → S03
- Layers → S02
- Alignment tools → S02
- Undo/redo → S02
- View 1 → View 2 data flow → S01 + S02

No uncovered vision elements remain.

## Verdict Rationale
**Verdict: PASS**

All three slices (S01, S02, S03) delivered their claimed outputs with comprehensive evidence:

1. **95/95 tests pass** across 7 test files — independently verified by running `npx vitest run` during validation.
2. **Zero TypeScript errors** under strict mode — independently verified by running `npx tsc --noEmit` during validation.
3. **All 25 key files exist** on disk — confirmed via `ls -la`.
4. **3 bundled font files present** in app/public/fonts/.
5. **9 architectural decisions** (D001-D009) recorded and consistent.
6. **12 patterns** and **10 lessons learned** documented in KNOWLEDGE.md.
7. **Cross-slice integration is clean** — S01→S02 data flow via props, S02→S03 type extension via discriminated union with compile-time exhaustiveness checking.
8. **UAT test plans** written for all 3 slices (S01: 16 tests, S02: 12 tests + edge cases, S03: 13 tests).

Known limitations (CORS permissiveness, no E2E tests, Blob URL for convert-to-paths, canvas components lacking dedicated unit tests) are all documented, trade-off-appropriate for the current milestone, and deferred to M003 production-hardening. None represent material gaps in the milestone's scope.
