Patterns
Agentic Workflow Patterns in Python (2026)
Five reusable agentic workflow patterns, built from scratch in Python with runnable code and a start-simple rule.
5 min read52
Tutorials
Step-by-step, code-heavy guides for building AI agents.
37 posts
From scratch
Self-Hosted AI App Builder: Run Your Own (2026)
A hands-on 2026 tutorial: stand up your own self-hosted, open-source AI app builder from the ai-app-builder-open repo, with one API key and code you fully own.
10 min read43
AI agents
Remote MCP Server Tutorial (2026): Serve Tools over Streamable HTTP
A runnable 2026 tutorial for turning a local MCP server into a remote one over Streamable HTTP. Serve tools with FastMCP, test the endpoint with curl and MCP Inspector, validate the Origin header, add a bearer token, then connect Claude. Covers the Mcp-Session-Id requirement and the DNS-rebinding gotcha the docs warn about but most walkthroughs skip.
9 min read98
AI agents
LangGraph Human-in-the-Loop (2026): Pause an Agent for Approval with interrupt()
A runnable LangGraph human-in-the-loop tutorial for 2026: pause an agent mid-run with interrupt(), review the proposed action, then approve, edit, or reject it with Command(resume=...). Includes the checkpointer requirement and the re-run-from-the-top gotcha that breaks most tutorials.
5 min read46
AI agents
How to Build an MCP Server in Python with FastMCP (2026)
A runnable 2026 tutorial: build a write-capable MCP server in Python with FastMCP and the official MCP SDK. Add tools with @mcp.tool(), back them with SQLite, test in the Inspector, and connect it to Claude for Desktop.
8 min read45
AI agents
AI Agent Web Search: Build a Web Search Agent in Python (2026)
A runnable 2026 tutorial: give an AI agent web search in Python with the Claude web_search server tool. Read citations, cap cost with max_uses, filter domains, and go multi turn.
6 min read41
From scratch
AI Agent Long-Term Memory in Python (2026): A Framework-Free Guide
A runnable 2026 tutorial: give a Claude agent long-term memory that survives across sessions using SQLite, embeddings, and cosine retrieval. No LangChain, FAISS, or vector database.
9 min read53
AI agents
LangGraph Tutorial: Build a Graph Agent in Python (2026)
A hands-on LangGraph tutorial for 2026: build the same tool-using AI agent two ways, with the five-line create_agent helper and as an explicit StateGraph you can customize. Fully runnable Python.
5 min read66
AI agents
How to Make an AI Agent in 2026 (Step by Step)
The five parts every AI agent has, a runnable Python example in about 40 lines, and an honest guide to the guardrails and framework choices most tutorials skip.
7 min read48
AI agents
Claude Agent SDK Custom Tools: Give Your Agent Its Own Functions (2026)
A runnable 2026 guide to custom tools in the Claude Agent SDK: define functions with tool() / @tool, bundle them into an in-process MCP server, register with allowedTools, and gate risky calls per argument with canUseTool. TypeScript and Python.
7 min read76
From scratch
AI Agent Memory: Long-Term Memory for a Claude Agent in TypeScript (2026)
A runnable 2026 tutorial: build short-term and long-term memory for a Claude agent in TypeScript with message buffers, rolling summaries, and a durable fact store. No vector database required.
8 min read44
AI agents
Claude Agent SDK vs LangGraph (2026): When Each Wins
A runnable comparison of the Claude Agent SDK and LangGraph in 2026, with the same agent built in both and an honest decision matrix for when each wins.
8 min read78