Implement auto-bidder-ai with FastAPI, LangChain, Llama-index, RAG, Next.js, and Tailwind CSS

[Copilot]

Complete implementation of an AI-powered proposal automation agent using modern ML and web frameworks as specified in requirements.

Backend (FastAPI + LangChain + Llama-index + RAG)

• FastAPI REST API with endpoints for job analysis, proposal generation, and document management
• LangChain integration for LLM orchestration with OpenAI models
• Llama-index for document indexing and retrieval
• RAG pipeline using ChromaDB vector store and HuggingFace embeddings for context-enhanced proposal generation
• Services layer:
  • ProposalService - AI-powered job analysis and proposal generation with confidence scoring
  • VectorStoreService - Document chunking, embedding, and similarity search
  • LlamaIndexService - Query engine for knowledge base retrieval

# Example: Generate proposal with RAG context
POST /api/v1/proposals/generate
{
  "job_requirement": {
    "title": "Full-Stack Developer",
    "description": "...",
    "requirements": ["React", "FastAPI"]
  }
}
# Returns AI-generated proposal with confidence score and sources

Frontend (Next.js 15 + Tailwind CSS + shadcn/ui)

• Next.js App Router with TypeScript for type-safe development
• Tailwind CSS v4 for styling with custom design tokens
• shadcn/ui components (Button, Card, Input, Textarea) following accessibility standards
• ProposalGenerator component with real-time analysis visualization, match scoring, and clipboard integration

Infrastructure

• Docker support with multi-stage builds for both services
• Docker Compose orchestration with health checks
• API tests using pytest for core endpoints
• Documentation: README with architecture diagram, QUICKSTART guide, CONTRIBUTING guidelines

Security Fixes

Updated all dependencies to patched versions, resolving 13 critical/high severity vulnerabilities:

• langchain-community: 0.0.13 → 0.3.27 (XXE, SSRF, pickle deserialization)
• llama-index-core: 0.9.48 → 0.13.0 (command injection, code execution, SQL injection)
• fastapi: 0.109.0 → 0.109.1 (ReDoS)

Refactored imports for compatibility with breaking changes in major version upgrades:

# Updated for LangChain 0.3+
from langchain_community.embeddings import HuggingFaceEmbeddings
from langchain_openai import ChatOpenAI

# Updated for Llama-index 0.13+
from llama_index.core import VectorStoreIndex, Settings
from llama_index.embeddings.huggingface import HuggingFaceEmbedding

See SECURITY.md for complete vulnerability audit and remediation details.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• fonts.googleapis.com
  • Triggering command: /usr/local/bin/node node /home/REDACTED/work/auto-bidder-ai/auto-bidder-ai/frontend/node_modules/.bin/next build (dns block)
• ui.shadcn.com
  • Triggering command: /usr/local/bin/node node /home/REDACTED/.npm/_npx/d66c5096c7023bfb/node_modules/.bin/shadcn init -y (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

Original prompt

ai, langchain, llama-index, rag, python fastapi, nextjs + tailwindcss + shadcn/ui

---

💬 We'd love your input! Share your thoughts on Copilot coding agent in our 2 minute survey.