Cut Your Claude API Bill by 90% Using Prompt Caching in TypeScript
How to use Anthropic prompt caching in TypeScript to cut Claude API costs by up to 90%. Where to place cache_control breakpoints, TTL tradeoffs, and real RAG...
When Your AI Feature Gets Gamed: Prompt Injection Defense for JavaScript Apps
Practical prompt injection defense for JavaScript web apps: input sanitization middleware, system prompt hardening, canary tokens, and output validation with...
How to Write an AI Feature Spec That Engineers Won't Push Back On
An AI feature spec template with the eight sections engineers actually want: success metrics, fallback behavior, latency budgets, edge cases, and eval sets....
Build a Voice-Enabled AI Assistant in the Browser with TypeScript
Build a voice AI assistant in the browser with TypeScript using the Web Speech API, an LLM, and speech synthesis. Handle interruption, wake words, and mobile...
Add AI-Powered Citations and Source Attribution to Your RAG Chatbot
Upgrade your RAG chatbot with inline citations using Claude's Citations API and a React UI that renders clickable source markers. Full TypeScript walkthrough...
How to Structure Your TypeScript Codebase So AI Coding Agents Work Better
Practical TypeScript codebase patterns that make Claude Code, Cursor, and Copilot dramatically more effective. CLAUDE.md, module boundaries, typed configs,...
How to Migrate from OpenAI Assistants API to Responses API in TypeScript
Migrate your OpenAI Assistants API integration to the Responses API in TypeScript before the mid-2026 sunset. Concept-by-concept mapping, before/after code...
Streaming AI UX in React: Handle Partial Markdown, Citations, and Error States
Build a streaming AI UI in React that renders partial markdown without layout shifts, shows citations as they arrive, and recovers from mid-stream errors....
How to Route LLM Requests to Cheap vs Expensive Models Automatically in TypeScript
Build an LLM model router in TypeScript that sends simple queries to Haiku and only escalates complex ones to Opus. Real classification logic, fallback...
Mastra vs VoltAgent: The Two New TypeScript Agent Frameworks Compared
Build the same AI agent in Mastra and VoltAgent — the two new TypeScript-native frameworks. Honest comparison of DX, memory, MCP support, observability, and...
Google Agent Development Kit for TypeScript: Build a Multi-Agent System from Scratch
Build a multi-agent research assistant with Google ADK for TypeScript. Supervisor agent coordinating three specialists — web researcher, data analyst, report...
Build an MCP Client in TypeScript That Connects to Multiple Tool Servers
Build a TypeScript MCP client that connects to multiple servers simultaneously and lets an LLM use tools from all of them in one conversation — with...
How to Add LLM Observability and Tracing to Your TypeScript AI App with Langfuse
Add LLM observability and tracing to your TypeScript AI app with Langfuse — trace every LLM call, tool invocation, and retrieval step, and build dashboards...
Should You Build or Buy AI Features for Your SaaS? A Decision Framework
A practical decision framework with real cost math to help you decide whether to build AI features with APIs or buy a third-party AI product for your SaaS....
Build a Multi-Agent Customer Support System with Handoffs in TypeScript
Build a multi-agent customer support system in TypeScript where a triage agent routes conversations to specialized billing, technical, and returns agents —...
How to Measure If Your AI Feature Is Actually Working (A Guide for Product Teams)
Stop relying on vibes. Learn what metrics to track, how to set up A/B tests, and when to kill an AI feature that isn't delivering value. Read the full post
Build an Agentic RAG Pipeline That Retries and Reformulates Queries
Upgrade your basic RAG pipeline to an agentic loop that evaluates retrieval quality, reformulates queries, and retries with alternative strategies — all in...
Claude Agent SDK vs OpenAI Agents SDK: Building AI Tools in TypeScript
Compare Claude Agent SDK and OpenAI Agents SDK by building the same coding assistant in both. Real TypeScript code, honest tradeoffs, and guidance on which...
Why Most AI Agent Architectures Are Overengineered (And What to Build Instead)
Most AI agent use cases don't need multi-agent frameworks. Learn how to replace overengineered agent architectures with a simple tool-calling loop in...
How to Build an AI-Powered Autocomplete for Any Text Input
Build a reusable React component that streams AI autocomplete suggestions as ghost text in any textarea — with debouncing, cancellation, and keyboard...