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.
Diagnosing Claude Code Subagents That Stall or Never Return
Diagnostic flow for Claude Code subagents that freeze, return silently, or produce the wrong output shape — classified by symptom with runnable examples.
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.
Claude Keeps Saying 'Response Incomplete' — A Layered Troubleshooting Guide
Diagnose why Claude or Claude Code freezes with a 'Response incomplete' or 'Try stopping' message. Walk through the four layers where generation can stall and recover the session without losing context.
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.
When Claude Says 'Failed to Send Message' — A Practical Triage and Recovery Guide
Why Claude shows 'Failed to send message' — broken down into five real causes, with a quick triage order and practical fixes for each.
Finishing Long-Running Claude Code Tasks: A Resilience Playbook You Can Ship
Multi-hour Claude Code jobs — bulk refactors, TypeScript migrations, mass test generation — always stop before they finish, and recovery is painful when you cannot tell what already ran. This guide ships concrete patterns: a checkpoint-driven manifest, a three-state circuit breaker, idempotent retry rules, and a freeze-and-resume protocol you can copy into your repo today.
Handling Frequent 529 Overloaded Errors from the Claude API — A Practical Playbook
A 529 Overloaded response from the Claude API is a very different animal from a 429 rate limit. Here is the retry, fallback, and circuit breaker playbook I actually use in production to keep services responsive when Anthropic's platform is temporarily saturated.
When Bash Misbehaves in Claude Code on Windows — A Practical Note on CLAUDE_CODE_USE_POWERSHELL_TOOL=1
On Windows, Claude Code's Bash-based shell tool sometimes fails in odd ways. Setting CLAUDE_CODE_USE_POWERSHELL_TOOL=1 routes commands through PowerShell and removes many of the symptoms. Here are the practical trade-offs I've seen after living with the switch.
Running Next.js on Cloudflare Workers in Production with Claude Code — Every Build Crisis, Cache Bug, and Automation Pattern We Solved
Running Next.js on Cloudflare Workers is not the same as Vercel. The 62 MiB bundle limit, ASSETS binding quirks, and edge cache personalization conflicts are real production hazards. Here's how Claude Code helped us solve each one.
Card Declined on Claude? Here's How to Fix It by Cause
Getting a payment declined error when renewing Claude Pro? This guide breaks down the most common causes — issuer blocks, 3-D Secure failures, debit and prepaid quirks, and billing limits — and walks you through fixing each one.
Upgraded to Claude Pro but Limits Haven't Changed — How to Diagnose and Fix It
Claude Pro or Max upgrade not reflecting? Learn how to diagnose whether payment completed, refresh your session, clear browser cache, and contact Anthropic support to get your plan unlocked.