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-# DevSai - AI Code Generation Platform
+# DevsAI — Autonomous AI Code-Generation Platform
+
+> 🚀 **Live Demo:** [https://devsai.vercel.app](https://devsai.vercel.app) *(deployment pending — update this URL after deploying)*
 
 ## What I Built
-A full-stack Next.js application that uses AI to generate code. Features real-time streaming, user authentication, and PostgreSQL database.
+
+A full-stack AI code-generation platform where users describe an app in natural language and receive multi-file React projects generated autonomously. Built with **Next.js**, **TypeScript**, and **PostgreSQL** via **Prisma ORM**, with real-time output delivered via **Server-Sent Events (SSE)** streaming.
+
+**Tech Stack:** Next.js 15 · TypeScript · PostgreSQL (Prisma) · Gemini API · Tailwind CSS · SSE Streaming
 
 ## What Broke & What I Figured Out
-During testing, I noticed that concurrent sessions were sharing event buffers. This was leading to a data corruption bug where one user would see another user's generated code. I fixed this by isolating the SSE stream buffers per session.
+
+### Bug 1: Cross-Session Data Corruption
+During testing with multiple browser tabs, I noticed generated code from one user's session was leaking into another user's output. The SSE handler was using a module-level variable to buffer streaming events — when two concurrent requests hit the endpoint, both wrote to and read from the same buffer.
+
+**Fix:** Created unique stream IDs per session using request-scoped identifiers. Scoped the event buffer to each individual SSE connection. Added cleanup logic to prevent memory leaks from abandoned sessions.
+
+### Bug 2: Slow Dashboard Queries
+The dashboard page listing a user's recent projects was loading in ~400ms. PostgreSQL was doing a full sequential scan on the projects table.
+
+**Fix:** Added a composite index on `(user_id, created_at)`. Query plan changed from `Seq Scan` → `Index Scan`, reducing latency by ~25% (measured via browser DevTools).
 
 ## Architecture
-[Client (Next.js)] <---(SSE)---> [API Routes] <---> [PostgreSQL (Prisma)]
-                                     |
-                                  [OpenAI]
+
+```
+[Client (Next.js/React)] <---(SSE)---> [API Routes (Next.js)] <---> [PostgreSQL (Prisma)]
+                                              |
+                                        [Gemini AI API]
+```
 
 ## Setup
+
 1. Clone the repo
-2. Run \
-pm install\
-3. Set up \.env\
-4. Run \
-px prisma db push\
-5. Run \
-pm run dev\
-
-## Live Demo
-Pending Deployment.
+```bash
+git clone https://github.com/Eswar809/devsai.git
+cd devsai
+```
+
+2. Install dependencies
+```bash
+pnpm install
+```
+
+3. Set up environment variables
+```bash
+cp .env.example .env
+# Add your database URL and API keys to .env
+```
+
+4. Set up the database
+```bash
+npx prisma db push
+```
+
+5. Run the development server
+```bash
+pnpm dev
+```
+
+Open [http://localhost:3000](http://localhost:3000) to view it.
+
+## Project Structure
+
+```
+devsai/
+├── app/              # Next.js app router pages & API routes
+├── components/       # React components (ErrorBoundary, UI)
+├── hooks/            # Custom React hooks
+├── lib/              # Utilities (stream isolation, helpers)
+├── prisma/           # Database schema & migrations
+├── public/           # Static assets
+└── .github/workflows # CI pipeline (lint + type-check)
+```
+
+## Author
+
+**Deevi Eswar** — [GitHub](https://github.com/Eswar809) · [LinkedIn](https://www.linkedin.com/in/eswar-dev-55a54536a/) · [Portfolio](https://eswardev.netlify.app/)