Source: https://seerepo.com/r/deepseek-ai/deepseek-harness/built
Markdown source: https://seerepo.com/r/deepseek-ai/deepseek-harness/built.md
Description: deepseek-harness is built with React and Vite and uses MCP, GitHub, and Anthropic. Every technology with the file and the line that prove it.

# What is deepseek-harness built with?

deepseek-harness is built with React and Vite and uses MCP, GitHub, and Anthropic.

Read on October 27, 2026, at commit 22ddee3.

Repository: https://github.com/deepseek-ai/deepseek-harness

## Frontend

### The base

- **React**: [in package.json](https://github.com/deepseek-ai/deepseek-harness/blob/22ddee3792402c3e70ec5f86a63c3e3e895a2f60/package.json)
- **Vite**: [in package.json](https://github.com/deepseek-ai/deepseek-harness/blob/22ddee3792402c3e70ec5f86a63c3e3e895a2f60/package.json)

## Backend

### Services

- **MCP**: 3 files · [packages/mcp/mcp-client/src/connection.ts, line 18](https://github.com/deepseek-ai/deepseek-harness/blob/22ddee3792402c3e70ec5f86a63c3e3e895a2f60/packages/mcp/mcp-client/src/connection.ts#L18)
- **GitHub**: 1 file · [packages/experimental/webhook-github/src/handler.ts, line 5](https://github.com/deepseek-ai/deepseek-harness/blob/22ddee3792402c3e70ec5f86a63c3e3e895a2f60/packages/experimental/webhook-github/src/handler.ts#L5)
- **Anthropic**: 1 file · [packages/subagent/subagent-claude-code/src/run.ts, line 17](https://github.com/deepseek-ai/deepseek-harness/blob/22ddee3792402c3e70ec5f86a63c3e3e895a2f60/packages/subagent/subagent-claude-code/src/run.ts#L17)

## Other repos with a similar stack

- [react/react](https://seerepo.com/r/react/react/built): React, MCP
- [anomalyco/opencode](https://seerepo.com/r/anomalyco/opencode/built): MCP, GitHub
- [ollama/ollama](https://seerepo.com/r/ollama/ollama/built): React, Vite
- [freeCodeCamp/freeCodeCamp](https://seerepo.com/r/freeCodeCamp/freeCodeCamp/built): React
- [nextjs/saas-starter](https://seerepo.com/r/nextjs/saas-starter/built): React

## Frequently asked questions

### What framework does deepseek-harness use?

React and Vite.

### What services does deepseek-harness use?

MCP, GitHub, and Anthropic.

### What language is deepseek-harness written in?

TypeScript, across 2,802 files.

## What is your repo built with?

SeeRepo draws your repo as a living map, and tells you this about it. https://seerepo.com/start