Create README.md

Author: devarshpatel1506

README.md

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+# Pathfinding-Visualizer — Interactive React Application
+
+**Tagline:** *Algorithmic search meets modern web engineering: visualize BFS, DFS, Dijkstra, and A* on a dynamic grid with real-time animations, metrics, and user interaction.*
+
+[▶ Live Demo](https://devarshpatel1506.github.io/Pathfinding-Visualizer/)  
+[💻 Source Code](https://github.com/devarshpatel1506/Pathfinding-Visualizer)
+
+---
+
+## 1) Executive Summary
+
+**On the surface:** This is an interactive **React single-page application** that lets users set start/goal nodes, draw obstacles, and visually compare how different pathfinding algorithms explore a grid.  
+
+**Under the hood:** It’s an **SDE-quality project** that demonstrates:
+- **Algorithm engineering** → BFS/DFS/Dijkstra/A* implemented as **pure, testable functions** separated from UI code.  
+- **Complexity awareness** → correct handling of weighted vs. unweighted graphs, heuristics in A*, and clear trade-offs between optimality and speed.  
+- **Front-end systems design** → decoupling of algorithm logic, state management, animation scheduling, and rendering.  
+- **Performance-oriented UI** → O(1) grid updates, frame batching, and smooth requestAnimationFrame-driven animation.  
+- **Software craftsmanship** → modular structure, React component decomposition, maintainable styles, and live deployment (GitHub Pages).
+
+---
+
+### 1.1 Why This Project Matters
+
+- **Education**: Helps students and engineers see abstract graph algorithms in action.  
+- **Engineering practice**: Shows how to design **separation of concerns** in a front-end system (algorithm engine vs. rendering engine).  
+- **Interview readiness**: Proves fluency in **algorithms + data structures** *and* modern **front-end frameworks**.  
+- **Portfolio polish**: Deployed, interactive, visually appealing, and technically rich.
+
+---
+
+### 1.2 Architecture (Conceptual)
+
+```mermaid
+flowchart LR
+  UI[User Input mouse and controls] --> Controller[Controller Handlers]
+  Controller --> State[Grid State Store]
+  State --> Engine[Algorithm Engine BFS DFS Dijkstra Astar]
+  Engine -->|visited order and path| Queue[Animation Queue]
+  Queue --> Renderer[React Renderer]
+  Renderer --> DOM[DOM Grid UI]
+```