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CodexR

Agentic AI Coding Assistant

A lightweight, web-based alternative to Cursor IDE. Completely agentic and RAG-powered, it enables developers to interact with their codebase through AI with real execution capabilities — not just suggestions, but actual code modifications, PR creation, and cross-tool integration.

Semantic code search with vector embeddings

Multi-model LLM via OpenRouter

Real execution capabilities (not just suggestions)

Key Features

  • Semantic code search using vector embeddings with PostgreSQL pgvector
  • Client-side embedding generation via Transformers.js (Xenova)
  • Multi-model LLM support via OpenRouter (Nvidia Nemotron, Google Gemini) with AI SDK v5 streaming
  • File attachment system with @filename syntax for injecting specific file context
  • GitHub sign-in via NextAuth.js with private repository embedding
  • Automated issue fetching and PR creation workflows
  • Notion API integration for cross-tool workspace collaboration
  • Type-safe database layer with Drizzle ORM

Tech Stack

Next.js 15React 19TypeScriptDrizzle ORMPostgreSQL (pgvector)OpenRouter APITransformers.jsAI SDK v5NextAuth.jsGitHub APINotion API