Chen Yuan

Independent developer building AI-powered tools and content automation pipelines. Writing about MCP, LLMs, and making computers do the boring work.

China Joined on May 17, 2026 https://medium.com/@chenyuan19920509

Education

Self-taught, 10+ years in software development

Work

Independent Developer & AI Builder

Chen Yuan

Aug 13

A Write Vanished into Thin Air: The 16-Year-Old SQLite Bug That Corrupted Tailscale's Databases

#python #programming #tutorial #ai

8 min read

Chen Yuan

Aug 12

AI Is Removing the Middle Class of Software Engineering

#python #programming #tutorial #ai

9 min read

Chen Yuan

Aug 11

A GPU Warp Is Just a Wide SIMD Vector

#python #programming #tutorial #ai

7 min read

Chen Yuan

Aug 10

Give Your AI Agent a Sandbox: Disposable Docker Isolation in Practice

#python #programming #tutorial #ai

6 min read

Chen Yuan

Aug 9

When the GPU Is Overkill: A Measurement-First Guide to CPU Inference

#python #programming #tutorial #ai

7 min read

Chen Yuan

Aug 7

Your Subprocesses Outlive Your Program. Here's How to Kill Them for Real.

#python #programming #tutorial #ai

7 min read

Chen Yuan

Aug 6

Timeouts Are Contracts, Not Safety Nets

#python #programming #tutorial #ai

8 min read

Chen Yuan

Aug 5

Parsing an LLM's JSON Before the Last Token Arrives

#python #programming #tutorial #ai

9 min read

Chen Yuan

Aug 4

Lost Updates, Phantom Rows, and the Isolation Level That Prevents Them

#python #programming #tutorial #ai

7 min read

Chen Yuan

Aug 3

Your Async Logs Are Lying to You: Correlation IDs with Contextvars

#python #programming #tutorial #ai

7 min read

Chen Yuan

Aug 2

Idempotent by Default: State Machines for Background Tasks in Python

#python #programming #tutorial #ai

7 min read

Chen Yuan

Aug 1

My AI Agent's Temp Files Were Leaking Across Runs. Here's the Guard Pattern That Stopped It.

#python #programming #tutorial #mcp

5 min read

Chen Yuan

Aug 1

The Manifest Was Valid. My AI Agent Was Still Running Yesterday's Plan.

#python #programming #tutorial #ai

7 min read

Chen Yuan

Aug 1

I Built a State Machine for My AI Agent's Publishing Pipeline. Here's the Pattern That Survived 50 Consecutive Runs.

#python #programming #tutorial #mcp

7 min read

Chen Yuan

Jul 31

My Similarity Check Let the Same Story Through 3 Times. Here's How I Killed It.

#programming #python #webdev #tutorial

3 min read

Chen Yuan

Jul 30

I Wrote Integration Tests for My MCP Failure Library. Here's the Pattern That Caught 3 Hidden Bugs.

#python #testing #mcp #programming

3 min read

Chen Yuan

Jul 25

I Replaced pytest-xdist With 60 Lines of subprocess.Popen. Here's Why.

#python #testing #tutorial #programming

4 min read

Chen Yuan

Jul 25

My AI Agent Kept Compressing the Same Conversation. Here's How I Fixed the Anti-Thrashing Bug.

#mcp #python #tutorial #programming

5 min read

Chen Yuan

Jul 24

I Added Retry Logic to My SQLite Failure Library. Here's the Exponential Backoff Pattern That Works.

#mcp #programming #tutorial #webdev

4 min read

Chen Yuan

Jul 24

I Upgraded My JSON Failure Library to SQLite. Now My AI Agents Share Crash Fixes Across Machines.

#mcp #programming #tutorial #webdev

4 min read

Chen Yuan

Jul 24

I Added a "Failure Library" to My MCP Server. Now My AI Agents Warn Each Other About Crashes Before They Happen.

#mcp #programming #tutorial #webdev

4 min read

Chen Yuan

Jul 14

My MCP Server Kept Crashing. Here's the Error Recovery Pattern That Saved It.

#mcp #programming #tutorial #webdev

4 min read

Chen Yuan

Jul 13

I Migrated My MCP Server From STDIO to Streamable HTTP. It Almost Worked.

#mcp #programming #tutorial #webdev

4 min read

Chen Yuan

Jul 11

I Built an AI Agent With Tools. The First 50 Calls Were a Disaster.

#ai #programming #tutorial #llm

3 min read

Chen Yuan

Jul 11

The Old Way of Publishing MCP Servers Is Gone. Here's What Replaced It.

#mcp #ai #programming #tutorial

4 min read

Chen Yuan

May 23

Docker 容器化实战：从零到生产部署

#docker #devops #containers #tutorial

2 min read

Chen Yuan

May 23

Python 自动化脚本实战：从入门到生产力

#python #automation #tutorial #scripting

2 min read

Chen Yuan

May 22

I Built an Open MCP Server Where AI Agents Cache Solutions and Warn Each Other About Failures

#mcp #ai #devops #opensource

2 min read

DEV Community

Chen Yuan

Badges

Writing Debut

Currently learning

A Write Vanished into Thin Air: The 16-Year-Old SQLite Bug That Corrupted Tailscale's Databases

AI Is Removing the Middle Class of Software Engineering

A GPU Warp Is Just a Wide SIMD Vector

Give Your AI Agent a Sandbox: Disposable Docker Isolation in Practice

When the GPU Is Overkill: A Measurement-First Guide to CPU Inference

Your Subprocesses Outlive Your Program. Here's How to Kill Them for Real.

Timeouts Are Contracts, Not Safety Nets

Parsing an LLM's JSON Before the Last Token Arrives

Lost Updates, Phantom Rows, and the Isolation Level That Prevents Them

Your Async Logs Are Lying to You: Correlation IDs with Contextvars

Idempotent by Default: State Machines for Background Tasks in Python

My AI Agent's Temp Files Were Leaking Across Runs. Here's the Guard Pattern That Stopped It.

The Manifest Was Valid. My AI Agent Was Still Running Yesterday's Plan.

I Built a State Machine for My AI Agent's Publishing Pipeline. Here's the Pattern That Survived 50 Consecutive Runs.

My Similarity Check Let the Same Story Through 3 Times. Here's How I Killed It.

I Wrote Integration Tests for My MCP Failure Library. Here's the Pattern That Caught 3 Hidden Bugs.

I Replaced pytest-xdist With 60 Lines of subprocess.Popen. Here's Why.

My AI Agent Kept Compressing the Same Conversation. Here's How I Fixed the Anti-Thrashing Bug.

I Added Retry Logic to My SQLite Failure Library. Here's the Exponential Backoff Pattern That Works.

I Upgraded My JSON Failure Library to SQLite. Now My AI Agents Share Crash Fixes Across Machines.

I Added a "Failure Library" to My MCP Server. Now My AI Agents Warn Each Other About Crashes Before They Happen.

My MCP Server Kept Crashing. Here's the Error Recovery Pattern That Saved It.

I Migrated My MCP Server From STDIO to Streamable HTTP. It Almost Worked.

I Built an AI Agent With Tools. The First 50 Calls Were a Disaster.

The Old Way of Publishing MCP Servers Is Gone. Here's What Replaced It.

Docker 容器化实战：从零到生产部署

Python 自动化脚本实战：从入门到生产力

I Built an Open MCP Server Where AI Agents Cache Solutions and Warn Each Other About Failures