diff --git a/bmad/_bmad-output/planning-artifacts/implementation-readiness-report-2026-04-13.md b/bmad/_bmad-output/planning-artifacts/implementation-readiness-report-2026-04-13.md
new file mode 100644
index 0000000..47c44b1
--- /dev/null
+++ b/bmad/_bmad-output/planning-artifacts/implementation-readiness-report-2026-04-13.md
@@ -0,0 +1,237 @@
+---
+stepsCompleted: ['step-01-document-discovery', 'step-02-prd-analysis', 'step-03-epic-coverage-validation', 'step-04-ux-alignment', 'step-05-epic-quality-review', 'step-06-final-assessment']
+inputDocuments:
+  - '_bmad-output/planning-artifacts/prd.md'
+  - '_bmad-output/planning-artifacts/architecture.md'
+  - '_bmad-output/planning-artifacts/epics.md'
+  - '_bmad-output/planning-artifacts/ux-design-specification.md'
+---
+
+# Implementation Readiness Assessment Report
+
+**Date:** 2026-04-13
+**Project:** try-bmad
+
+## Document Inventory
+
+| Document Type | File | Format |
+|---------------|------|--------|
+| PRD | prd.md | Whole |
+| Architecture | architecture.md | Whole |
+| Epics & Stories | epics.md | Whole |
+| UX Design | ux-design-specification.md | Whole |
+
+**Issues:** None — all 4 required documents found, no duplicates.
+
+## PRD Analysis
+
+### Functional Requirements
+
+FR1: Render a 4x4 grid with empty cell placeholders
+FR2: Spawn 2 random tiles on game initialization
+FR3: Spawn 1 random tile after each valid move (90/10 probability: value 2 vs value 4)
+FR4: Slide all movable tiles in the input direction (up, down, left, right)
+FR5: Merge identical adjacent tiles using leading-edge merge order
+FR6: Enforce once-per-move merge rule (tile merges at most once per move)
+FR7: Track and display current score, incrementing by merged tile values
+FR8: Track and display best score, updating when current exceeds it
+FR9: Persist best score across sessions using localStorage
+FR10: Detect game over condition (no valid moves remaining on full board)
+FR11: Detect win condition (2048 tile created) and display win overlay (trigger once)
+FR12: Provide "Keep playing" mode after winning
+FR13: Provide New Game button (no confirmation dialog)
+FR14: Accept keyboard input: arrow keys
+FR15: Accept keyboard input: WASD keys
+FR16: Accept keyboard input: Vim hjkl keys
+FR17: Accept touch/swipe input (10px threshold, dominant-axis detection)
+FR18: Display 12-tier tile color system matching original 2048
+FR19: Animate tile sliding (100ms CSS transition, ease-in-out)
+FR20: Animate new tile spawn (200ms pop, scale 0 to 1.0)
+FR21: Animate tile merge (200ms bounce, scale 1.0 to 1.2 to 1.0)
+FR22: Animate score addition (+N float, 600ms, rises and fades)
+FR23: Persist full game state to localStorage after every valid move
+FR24: Restore game state from localStorage on page load
+FR25: Display game over overlay with "Try again" button
+FR26: Display win overlay with "Keep going" and "New Game" buttons
+FR27: Fade in overlays with 800ms opacity transition
+FR28: Render responsive layout (500px desktop, 280px mobile at 520px breakpoint)
+FR29: Display tile glow effect on values 128+
+FR30: Apply dynamic font sizing by digit count (55/45/35/25/15px)
+FR31: Deploy as static site to GitHub Pages via GitHub Actions
+
+**Total FRs: 31**
+
+### Non-Functional Requirements
+
+NFR1: Initial page load under 1 second
+NFR2: All CSS animations at 60fps
+NFR3: Input-to-visual-response latency under 16ms
+NFR4: Production bundle size under 50KB gzipped
+NFR5: Support modern evergreen browsers (Chrome, Firefox, Safari, Edge)
+NFR6: WCAG AA accessibility compliance
+NFR7: Respect prefers-reduced-motion media query
+NFR8: Fully client-side — no backend, no server communication
+NFR9: Game logic as pure JavaScript functions, testable independently
+
+**Total NFRs: 9**
+
+### Additional Requirements
+
+- Starter template: create-vite + Svelte + Tailwind CSS v4 + Vitest
+- Project structure: src/lib/ (pure JS), src/components/ (Svelte)
+- Immutable state returns from game logic
+- Props-down architecture (no Svelte stores)
+- localStorage schema: gameState + bestScore keys
+- CSS transitions only (no JS setTimeout for animations)
+- Constants module for shared values
+- Clear Sans font with fallback chain
+
+### PRD Completeness Assessment
+
+**Status: COMPLETE** — PRD covers executive summary, project classification, success criteria (user/technical/measurable), product scope (MVP + 3 phases), 3 user journeys, web app requirements, responsive design specs, performance targets, and risk mitigation. No gaps identified.
+
+## Epic Coverage Validation
+
+### Coverage Matrix
+
+| FR | PRD Requirement | Epic Coverage | Status |
+|----|----------------|---------------|--------|
+| FR1 | 4x4 grid rendering | Epic 1, Story 1.3 | Covered |
+| FR2 | Spawn 2 tiles at start | Epic 1, Story 1.2 | Covered |
+| FR3 | Spawn 1 tile per move (90/10) | Epic 1, Story 1.2 | Covered |
+| FR4 | Slide tiles in 4 directions | Epic 1, Story 1.2 | Covered |
+| FR5 | Leading-edge merge order | Epic 1, Story 1.2 | Covered |
+| FR6 | Once-per-move merge rule | Epic 1, Story 1.2 | Covered |
+| FR7 | Current score tracking | Epic 1, Story 1.4 | Covered |
+| FR8 | Best score display | Epic 2, Story 2.1 | Covered |
+| FR9 | Best score persistence | Epic 2, Story 2.2 | Covered |
+| FR10 | Game over detection | Epic 1, Stories 1.2 + 1.6 | Covered |
+| FR11 | Win detection + overlay | Epic 1, Stories 1.2 + 1.6 | Covered |
+| FR12 | Keep playing mode | Epic 2, Story 2.3 | Covered |
+| FR13 | New Game button | Epic 1, Story 1.4 | Covered |
+| FR14 | Arrow key input | Epic 1, Story 1.5 | Covered |
+| FR15 | WASD key input | Epic 4, Story 4.1 | Covered |
+| FR16 | Vim hjkl key input | Epic 4, Story 4.1 | Covered |
+| FR17 | Touch/swipe input | Epic 4, Story 4.2 | Covered |
+| FR18 | 12-tier tile colors | Epic 1, Story 1.3 | Covered |
+| FR19 | Slide animation (100ms) | Epic 3, Story 3.1 | Covered |
+| FR20 | Spawn pop animation (200ms) | Epic 3, Story 3.2 | Covered |
+| FR21 | Merge bounce animation (200ms) | Epic 3, Story 3.3 | Covered |
+| FR22 | Score float animation (600ms) | Epic 3, Story 3.4 | Covered |
+| FR23 | Game state persistence | Epic 2, Story 2.2 | Covered |
+| FR24 | Game state restore | Epic 2, Story 2.2 | Covered |
+| FR25 | Game over overlay | Epic 1, Story 1.6 | Covered |
+| FR26 | Win overlay | Epic 1, Story 1.6 | Covered |
+| FR27 | Overlay fade animation | Epic 3, Story 3.5 | Covered |
+| FR28 | Responsive layout | Epic 4, Story 4.3 | Covered |
+| FR29 | Tile glow (128+) | Epic 5, Story 5.1 | Covered |
+| FR30 | Dynamic font sizing | Epic 5, Story 5.2 | Covered |
+| FR31 | GitHub Pages deployment | Epic 5, Story 5.3 | Covered |
+
+### Missing Requirements
+
+None — all FRs have traceable implementation paths.
+
+### Coverage Statistics
+
+- Total PRD FRs: 31
+- FRs covered in epics: 31
+- Coverage percentage: 100%
+
+## UX Alignment Assessment
+
+### UX Document Status
+
+Found: `ux-design-specification.md` — comprehensive spec covering visual design, components, interactions, responsive design, and accessibility.
+
+### UX ↔ PRD Alignment
+
+- User journeys match across both documents
+- Visual specs (colors, typography, animations) support all PRD requirements
+- Accessibility requirements (WCAG AA, reduced motion) aligned
+- **No misalignments found**
+
+### UX ↔ Architecture Alignment
+
+- 5 Svelte components match UX component strategy exactly
+- CSS transition approach supports UX animation timing specs
+- Responsive breakpoint (520px) consistent across both
+- Props-down pattern supports UX state communication
+- **No architectural gaps for UX requirements**
+
+### UX ↔ Epics Alignment
+
+- 20 UX Design Requirements (UX-DR1 through UX-DR20) extracted and referenced in story acceptance criteria
+- Accessibility, visual design, responsive, and animation UX-DRs distributed across all 5 epics
+- **No UX requirements left uncovered**
+
+### Warnings
+
+None — UX document is comprehensive and fully aligned with PRD and Architecture.
+
+## Epic Quality Review
+
+### Epic Structure Validation
+
+All 5 epics deliver user value and maintain independence:
+- Epic 1: Standalone complete game
+- Epic 2: Adds persistence (uses Epic 1 only)
+- Epic 3: Adds animations (uses Epic 1+2)
+- Epic 4: Adds mobile/input (uses Epic 1+2+3)
+- Epic 5: Adds polish + deploy (uses all previous)
+
+No epic requires a future epic to function.
+
+### Story Dependency Analysis
+
+All 20 stories follow forward-only dependencies within their epics. No story references features from future stories. Stories in Epics 3-5 are largely independent of each other within their epic.
+
+### Acceptance Criteria Quality
+
+All stories use Given/When/Then BDD format with specific, testable criteria. Edge cases covered include: corrupted localStorage, invalid moves, reduced motion preference, accidental swipes, diagonal touches, full board scenarios.
+
+### Starter Template Compliance
+
+Story 1.1 correctly implements Architecture's specified starter template (create-vite + Svelte + Tailwind + Vitest) as the first implementation story.
+
+### Violations Found
+
+- **Critical:** 0
+- **Major:** 0
+- **Minor:** 1 — Story 1.1 (scaffold) is technical but justified by Architecture's greenfield starter template requirement
+
+### Recommendations
+
+None — epic and story quality meets all best practice standards.
+
+## Summary and Recommendations
+
+### Overall Readiness Status
+
+**READY**
+
+### Critical Issues Requiring Immediate Action
+
+None.
+
+### Assessment Summary
+
+| Category | Result |
+|----------|--------|
+| Documents | 4/4 found, no duplicates |
+| FR Coverage | 31/31 (100%) |
+| NFR Coverage | 9/9 documented |
+| UX Alignment | Fully aligned across PRD, Architecture, and Epics |
+| Epic Quality | 0 critical, 0 major, 1 minor |
+| Story Quality | All 20 stories have testable Given/When/Then ACs |
+| Dependencies | No forward dependencies, all epics independent |
+
+### Recommended Next Steps
+
+1. Proceed to Sprint Planning to sequence the 20 stories for implementation
+2. Begin with Epic 1, Story 1.1 (Project Scaffold) as the foundation
+3. Consider running stories 1.1 and 1.2 in the first sprint as they establish the project foundation and core game logic
+
+### Final Note
+
+This assessment identified 0 critical issues across 6 validation categories. All planning artifacts (PRD, Architecture, UX Design, Epics & Stories) are complete, aligned, and ready for implementation. The project can proceed directly to Sprint Planning.