DeepSeek Reasonix Tutorial: Zero-Cost AI Coding Agent in 30 Minutes

30 DeepSeek Reasonix AI Agent bug—— DeepSeek prefix-cache token 1/5

• **AI Agent ** TUI npx reasonix code
• ****94% cache hitappend-only
• **Skills ** Markdown Agent

• DeepSeek API Keyplatform.deepseek.com
• Node.js ≥ 22macOS / Linux / Windows
• demo

Reasonix append-only DeepSeek prefix-cache

1 Reasonix API Key

Reasonix Node.js ≥ 22

#
cd /path/to/your-project

# API Key
npx reasonix code

DeepSeek API Key Key ~/.reasonix/config.json

****DeepSeek API —— $0.07/Mtok $0.014/MtokReasonix append-only 90%

#
cat ~/.reasonix/config.json

#
npx reasonix --help

Reasonix Tauri Node runtime tab cost/cache/token —— CI/CD

2 AI

Reasonix TUI IDE ——diff git diff ls

Reasonix DeepSeek V4-Flash /pro V4-Pro

# Flash
> Python

# Pro
/pro
>

Reasonix shell

Reasonix bug

utils.py parse_config

Reasonix

1. utils.py parse_config
3. try/except os.path.exists

Reasonix git diff

3 Skills

Skills Reasonix —— Markdown Agent .reasonix/skills/

Code Review Skill

.reasonix/skills/code-review.md

---
name: code-review
description:
runAs: subagent
allowed-tools: [read, grep, glob]
---

##

##

1. **** SQL XSS
2. **** N+1
3. ****>30

##

 markdown

Reasonix

Reasonix subagent Skill read``grep``glob ——

Skill

Skill

• ** CHANGELOG** git log
• ** + **
• **API ** OpenAPI

Skills Markdown git Agent

4 MCP

Reasonix MCPModel Context Protocol stdioSSEStreamable HTTP

MCP Server

# GitHub MCP Server
npx reasonix code --mcp "github=npx @anthropic/mcp-server-github"

# MCP Server
npx reasonix code --mcp "fs=npx @anthropic/mcp-server-filesystem /path/to/allowed/dir"

~/.reasonix/config.json

{
 "mcp": {
 "github": {
 "command": "npx",
 "args": ["@anthropic/mcp-server-github"]
 },
 "filesystem": {
 "command": "npx",
 "args": ["@anthropic/mcp-server-filesystem", "/home/user/projects"]
 }
 }
}

MCP server Reasonix registry GitHub MCP " PR"——Reasonix GitHub

FAQ

Q1npx reasonix code "Node version too old

Node.js ≥ 22 node -v nvm

nvm install 22
nvm use 22

Q2API Key

~/.reasonix/config.json apiKey

export DEEPSEEK_API_KEY="sk-xxxxxxxxxxxxxxxx"

Q3 token 1/5

Reasonix append-only DeepSeek prefix-cache marker 50+ 90%+ token 1/51/4

Q4Reasonix Claude Code

Claude Code Anthropic Agent Claude APIReasonix DeepSeek DeepSeek + Reasonix Cache-First —— Reasonix Claude Code

tools hover-card DeepSeek``Reasonix``Claude Code``Node.js

/

• Reasonix
• GitHub: esengine/DeepSeek-Reasonix
• DeepSeek API

• Claude Code + AWS AI SaaS3 $12,000
• Claude Code 48+293$9,000

DeepSeek

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• Claude Code + DeepSeek V4 API 90%15
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