Jeff Reese

20 years shipping software. Building AI tools, teaching engineers to use them. Now writing about context engineering and the patterns that emerge when you treat AI configuration as real engineering.

SLC, UT Joined on Mar 23, 2026 https://purecontext.dev

Work

Pure Context, LLC

Jeff Reese

May 3

I Built a Custom App in a Day. That Is Not the Interesting Part.

#ai #claudecode #mcp #productivity

4 min read

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Jeff Reese

May 2

Spec-Driven Development

#ai #claudecode #agenticengineering #programming

5 min read

Jeff Reese

May 1

When to NOT Use AI

#ai #programming #beginners #productivity

5 min read

Jeff Reese

Apr 30

Long Context vs RAG: When to Load the Whole Book

#ai #rag #machinelearning #beginners

6 min read

Jeff Reese

Apr 29

Embeddings: How AI Knows Things Are Similar

#ai #embeddings #machinelearning #beginners

6 min read

Jeff Reese

Apr 28

Tool Use: Giving AI Hands

#ai #api #tooluse #beginners

5 min read

Jeff Reese

Apr 27

Why Your Prompt Works in ChatGPT But Not in Your App

#ai #api #prompting #beginners

5 min read

Jeff Reese

Apr 24

Structured Output: When You Need JSON, Not Prose

#ai #json #prompting #beginners

5 min read

Jeff Reese

Apr 24

How Rules and Skills Actually Work in Claude Code

#ai #claudecode #devtools #contextengineering

8 min read

Jeff Reese

Apr 23

Debugging a Prompt: When the Output Keeps Missing

#ai #prompting #debugging #beginners

7 min read

Jeff Reese

Apr 22

Multi-Turn Conversations: Designing a Back-and-Forth

#ai #prompting #multiturn #conversations

6 min read

Jeff Reese

Apr 21

Chain-of-Thought: Teaching AI to Reason Out Loud

#ai #prompting #reasoning #chainofthought

5 min read

Jeff Reese

Apr 20

Few-Shot Prompting: Show, Don't Describe

#ai #prompting #beginners #fewshot

4 min read

Jeff Reese

Apr 17

Everyone Keeps Saying "RAG." What Does It Mean?

#ai #rag #beginners #enterprise

5 min read

Jeff Reese

Apr 17

What is MCP and Why Should I Care?

#ai #mcp #beginners #integration

4 min read

Jeff Reese

Apr 16

What is an "Agent" and Do I Actually Need One?

#ai #agents #beginners #hype

4 min read

Jeff Reese

Apr 15

Why Does AI Just... Make Stuff Up?

#ai #hallucination #beginners #trust

4 min read

Jeff Reese

Apr 13

Why Does My AI Keep "Forgetting" Things?

#ai #contextwindows #beginners #productivity

4 min read

Jeff Reese

Apr 10

The Instruction Manual Your AI Never Got

#ai #beginners #prompting #productivity

4 min read

Jeff Reese

Apr 9

My Prompt Library is Getting Unruly. Help!

#ai #productivity #prompts #beginners

4 min read

Jeff Reese

Apr 8

What Makes a Good Prompt "Good"?

#ai #beginners #prompting #productivity

5 min read

Jeff Reese

Apr 7

Do I Really Need to Care Which AI I Use?

#ai #beginners #machinelearning #productivity

5 min read

Jeff Reese

Apr 7

I Built Multi-Agent Collaboration Before Agent Teams Existed. Here is What I Learned.

#claudecode #ai #agents #agentteams

5 min read

Jeff Reese

Apr 7

What the Hell is a Token?

#ai #beginners #machinelearning #tokens

4 min read

Jeff Reese

Mar 31

Re-entry Vectors and the Basin of Attraction

#ai #contextengineering #languagemodels #machinelearning

7 min read

Jeff Reese

Mar 26

Your Conversations Are Not Gone

#ai #claudecode #contextengineering #developertools

3 min read

Jeff Reese

Mar 25

SOLID Principles for AI Config

#ai #claude #developertools #configuration

4 min read

Jeff Reese

Mar 25

I Built a Tool That Builds Tools

#ai #devtools #contextengineering #workflow

4 min read

Jeff Reese

Mar 24

Meet Cairn

#ai #claudecode #collaboration #contextengineering

7 min read

Jeff Reese

Mar 23

Externalizing State

#ai #contextengineering #devtools #architecture

4 min read

Jeff Reese

Mar 23

My AI Does Not Have a Clock

#ai #philosophy #collaboration #consciousness

5 min read

Jeff Reese

Mar 23

From Early Adopter to AI Instructor: Teaching 500 Engineers to Build with LLMs

#ai #teaching #career #llm

3 min read

Jeff Reese

Mar 23

Rules vs Skills in Claude Code

#ai #claudecode #devtools #contextengineering

5 min read

DEV Community

Jeff Reese

Badges

Writing Debut

I Built a Custom App in a Day. That Is Not the Interesting Part.

Want to connect with Jeff Reese?

Spec-Driven Development

When to NOT Use AI

Long Context vs RAG: When to Load the Whole Book

Embeddings: How AI Knows Things Are Similar

Tool Use: Giving AI Hands

Why Your Prompt Works in ChatGPT But Not in Your App

Structured Output: When You Need JSON, Not Prose

How Rules and Skills Actually Work in Claude Code

Debugging a Prompt: When the Output Keeps Missing

Multi-Turn Conversations: Designing a Back-and-Forth

Chain-of-Thought: Teaching AI to Reason Out Loud

Few-Shot Prompting: Show, Don't Describe

Everyone Keeps Saying "RAG." What Does It Mean?

What is MCP and Why Should I Care?

What is an "Agent" and Do I Actually Need One?

Why Does AI Just... Make Stuff Up?

Why Does My AI Keep "Forgetting" Things?

The Instruction Manual Your AI Never Got

My Prompt Library is Getting Unruly. Help!

What Makes a Good Prompt "Good"?

Do I Really Need to Care Which AI I Use?

I Built Multi-Agent Collaboration Before Agent Teams Existed. Here is What I Learned.

What the Hell is a Token?

Re-entry Vectors and the Basin of Attraction

Your Conversations Are Not Gone

SOLID Principles for AI Config

I Built a Tool That Builds Tools

Meet Cairn

Externalizing State

My AI Does Not Have a Clock

From Early Adopter to AI Instructor: Teaching 500 Engineers to Build with LLMs

Rules vs Skills in Claude Code