Why Your Custom MCP Server's Logs Disappear — Writing to stderr in Claude Code
If you're building your own MCP server and your console.log lines never appear — while Claude Code silently reports the tool as unresponsive — you're probably polluting stdio. Here's how to spot it and rewrite your logs to keep the protocol intact.
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.
The Claude Code Error Handbook — Auth, Billing, Stalls, Tools & MCP, Diagnosed by Symptom
A field-tested reference for 40+ Claude Code error patterns, organized by visible symptom: authentication, billing, response stalls, tool failures, MCP connectivity, and hook issues. Each entry tells you where to look and what to change.
Three Minutes with /doctor: Catching Claude Code Config Drift Before It Costs You an Hour
When Claude Code acts up, the first thing to run is /doctor. It shows merged settings, MCP server status, and permission mode at a glance.
Building a Custom Autonomous Agent Loop with Claude Code SDK — Beyond the CLI
Understand the internals of the Claude Code SDK and build custom autonomous agent loops in Python and TypeScript. Covers tool permissions, error recovery, and streaming, plus the cost instrumentation and monthly model audits I rely on in real operation.
Four Places My MCP Agent Broke — Measuring Aggregation Tools, Fake Parallelism, and Input Validation
The implementation holes I hit while running MCP servers and agent workflows as a solo developer, with numbers measured on my own machine: boundary values in aggregation tools, parallelism that quietly runs serially, brittle JSON parsing, and the limits of blocklist-style input validation.
Implementing Design Systems as Claude Skills: Learning from kintone's AI-Ready Documentation
Learn how to transform your design system into AI-readable Claude Agent Skills, using Cybozu's kintone Design System as a reference. This guide covers the differences between MCP and Skills, SKILL.md design principles, and documentation optimization for AI integration.
Managing Your Obsidian Knowledge Base with Claude MCP (2026)
Connecting Obsidian to Claude MCP so an AI can search, write, and reorganize your vault — setup through everyday workflows with Claude Code.
MCP Server Production Deployment, Security, and Monetization — Your Roadmap to Launching MCP as a SaaS
Deploy and monetize MCP servers: OAuth 2.0 auth, rate limiting, Stripe billing, CI/CD, and Cloudflare Workers — TypeScript patterns included.
Cowork Multi-MCP Orchestration in Practice: A Complete Blueprint for Automating Figma, GitHub, and Stripe
Learn how to design and implement cross-service orchestration in Cowork connecting Figma, GitHub, and Stripe. A complete blueprint for indie developers to build production-ready automation systems from scratch.
Claude Cowork × MCP Server Integration Guide — Building a Cross-Service Automation Ecosystem with Slack, Notion & GitHub
Learn how to integrate MCP servers with Claude Cowork to build automated workflows spanning Slack, Notion, and GitHub. Covers connector setup, design patterns, and production best practices.
Claude MCP Hybrid Architecture — Design Patterns for Combining Deterministic Tools with AI Reasoning
Learn how to build reliable AI agents using Claude MCP hybrid architecture. Combine deterministic tools with AI reasoning using patterns inspired by Andrew Ng's Tool Use framework.