# KnowledgeBase.AI

**Repository Path**: ymjake/knowledgebase-aI

## Basic Information

- **Project Name**: KnowledgeBase.AI
- **Description**: KnowledgeBase.AI POC
- **Primary Language**: C#
- **License**: MIT
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 1
- **Forks**: 0
- **Created**: 2026-03-16
- **Last Updated**: 2026-03-21

## Categories & Tags

**Categories**: Uncategorized

**Tags**: Aspnet, KnowledgeBase, Agent, MCP

## README

# KnowledgeBase.AI

A knowledge base–driven AI customer service PoC built with .NET 10, featuring multi-path RAG retrieval, knowledge graph extraction, and agent orchestration.

## Tech Stack

**Core**
- .NET 10 + .NET Aspire
- Vertical Slice Architecture + CQRS + Mediator (source generator)
- Minimal API + API Versioning
- FluentValidation + Mapperly
- Serilog + OpenTelemetry

**AI & Agent**
- Microsoft Agent Framework (MAF)
- Microsoft.Extensions.AI
- GraphRag (managedcode)

**Storage**
- PostgreSQL 18 + pgvector + Apache AGE
- Entity Framework Core + Npgsql

**Documentation**
- Swagger / OpenAPI

## Features

### Model Management
- Multi-provider support: OpenAI / Azure OpenAI / Ollama / any OpenAI-compatible API
- Per-model configuration: endpoint, API key, deployment name
- Separate chat and embedding model management

### Knowledge Base
- Document upload and processing (PDF, Word, Markdown, TXT)
- Automatic chunking and vectorization pipeline
- Multi-path retrieval:
    - **Vector Search** — semantic similarity via pgvector
    - **Full-Text Search** — BM25 lexical search via PostgreSQL FTS
    - **PageIndex Tree Search** — reasoning-based hierarchical document retrieval
    - **Hybrid Search** — RRF fusion of vector + BM25 results
    - **Rerank** — LLM-based result reranking

### Knowledge Graph
- Automatic entity and relation extraction via LLM
- Graph storage with PostgreSQL + Apache AGE
- Per-knowledge-base graph profile: configurable extraction model, node/edge limits
- Extraction run tracking with status and audit log
- Graph visualization 

### AI Agent
- Customer service agent configuration
- Bind models, knowledge bases, and MCP tools
- System prompt management

### Session Management
- Multi-turn conversation with context sliding window
- SSE streaming responses
- Auto-generated session titles (ChatGPT-style)
- Session history and message persistence

### MCP Tools
- External tool registration and management
- Agent-tool binding
- Tool call audit logging