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 read413
Tutorials
Step-by-step, code-heavy guides for building AI agents.
84 posts
AI agents
Remote MCP Server in Python (2026): Serve Tools over Streamable HTTP
A runnable 2026 tutorial for turning a local Python MCP server into a remote one over Streamable HTTP. Serve tools, prove the endpoint with curl and MCP Inspector, switch on the DNS-rebinding protection that ships off by default, add a bearer token, then connect a client. Covers the Mcp-Session-Id requirement and the host and port arguments that moved off the constructor between SDK majors.
14 min read503
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 read987
AI agents
How to Build an MCP Server in Python (2026 Tutorial)
A runnable 2026 tutorial: build a write-capable MCP server in Python with the official MCP SDK. Add tools with @mcp.tool(), back them with SQLite, test in the Inspector, and connect it to Claude for Desktop. Includes the 1.x and 2.x import difference and how to check which you have.
11 min read306
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 read302
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 read270
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 read422
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 read251
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 read367
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 read224
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 read596
From scratch
How to Build an AI Agent With the Claude Agent SDK in Python (2026)
A runnable Python quickstart: install the Claude Agent SDK, stream a run with query(), then give the agent your own tools with the @tool decorator and ClaudeSDKClient. Builds a weather agent that chains two tools.
6 min read308