All Articles
Selling Knowledge Products with Claude API — Generating PDFs, Templates, and Newsletters That Actually Make Money
How to use Claude API to auto-generate and sell knowledge products — PDFs, templates, and newsletters — through platforms like Gumroad and Stripe. Includes working code examples.
Claude API × Convex: Reactive AI Apps — Data Flow, Streaming, and Agent Patterns
How to combine Convex's reactive database with the Claude API to build chat and agent applications that hold up in production. Covers schema design, the Action/Mutation/Query boundary, streaming, tool-call state, and the cold-start pitfalls nobody warns you about.
Why Claude Vision Misses Things — The Preprocessing Settings That Actually Matter
When Claude Vision struggles to read your images, the fix usually isn't a better prompt — it's better preprocessing. Here's a practical look at how resolution, cropping, and model choice change what Claude can actually see, drawn from shipping Vision-powered features in production.
Running the Claude API in Python Production — Rate Limits, Retries, and Timeouts
If you put Claude API into a real backend service, how you handle 429, 503, and read timeouts decides your reliability ceiling. This is the design I settled on after operating it in production.
Claude API × MCP: Building a Paid Consulting SaaS That Runs Without You
Build a sustainable consulting SaaS solo. Learn the complete architecture, implementation, and operations behind a ¥30,000/month revenue system using Claude API, MCP, Stripe, and CloudFlare KV. Includes real code, cost breakdowns, and hard-won lessons from scaling to enterprise.
Claude API Micro-SaaS Pricing Blueprint — Blending Usage, Subscription, and Freemium for Durable Margins
A practical blueprint for pricing a Claude API powered micro-SaaS: how to reverse-engineer healthy margins from token economics, blend usage-based, subscription, and Freemium models, and launch prices you can adjust without breaking trust.
Giving Claude Agents Long-Term Memory in Production — Seven Pitfalls and the Patterns That Fix Them
A production playbook for Claude agents with long-term memory — seven pitfalls that break memory agents live, and the design patterns that fix each one.
Shadow Mode with Claude Agent SDK — Measuring Agent Accuracy on Live Traffic Without Touching Users
You want to ship an AI agent to production, but you can't measure its real accuracy without exposing real users. Shadow mode solves that paradox. This guide shows how to run a Claude Agent SDK agent alongside your existing workflow, log the deltas, and promote it step by step.
High-Availability Patterns for the Claude API — Making Sonnet/Haiku/Opus Fallback Work in Production
A single-model Claude API integration will fall over the first time rate limits or a regional hiccup land at peak hours. This is the production pattern for a Sonnet → Opus → Haiku fallback chain, with circuit breakers, streaming coverage, and the pitfalls you only learn the hard way.
Using tool_choice to Cut Wasted Inference: Four Modes and Cost Patterns for Production
tool_choice is one of the most underused parameters in the Claude API. The four modes — auto, any, tool, and none — each change both behavior and token cost. Here are the patterns I reach for in production, with runnable code.
Running Claude API Parallel Tool Use in Production — Controlling Concurrency, Designing for Partial Failure, and Cutting Latency
Claude API's parallel tool use can cut agent latency in half — but partial failures and state conflicts show up fast in production. Here's how to control concurrency, design error handling, and add observability.
Production Prompt-Injection Defense for the Claude API — Detection, Sanitization, and Layered Guardrails
A practical, code-first design guide for defending Claude API applications against prompt injection — covering input sanitization, channel separation, output validation, and red-teaming for long-term safety.