How to Handle Errors in Custom LangChain Tools (with Middleware)
Why handle_tool_error stops working the moment your LangChain agent has middleware attached, and how to catch tool errors with wrap_tool_call or ToolRetryMiddleware instead.
Topic
How To
Tactical how-to / step-by-step / troubleshooting
How to Install Claude Code on macOS, Linux, and Windows
One native-installer command per shell, the Windows PowerShell-vs-CMD gotcha, and how to verify the install actually worked.
How to Fix LangChain AgentExecutor Not Calling Tools
AgentExecutor's verbose trace shows it choosing a tool, then the chain just finishes - no error, no tool result. Here's why, and the five-check fix.
Fix LangChain create_react_agent 'unexpected keyword argument prompt'
The TypeError comes from a kwarg rename between langgraph versions - or the wrong create_react_agent import entirely. Here's how to tell which and fix it.
How to fix Cursor's Terminal sandbox error on Linux (AppArmor)
Cursor's terminal sandbox fails on Ubuntu 24.04+, Fedora, and Arch because of an AppArmor namespace restriction -- here's the two-command fix and why chmod 4755 makes it worse.
Fix Claude Code MCP "Failed to Connect" (Bun Runtime Bug)
curl reaches your HTTP MCP server fine, but Claude Code's CLI still says 'Failed to connect' -- here's why the Bun runtime is the actual point of failure, and three ways around it.
Fix LangChain Output Parsing Errors (handle_parsing_errors=True)
handle_parsing_errors=True only retries LangChain's free-text ReAct loop -- it can't fix a model that won't format output reliably. Here's what actually works.
Cursor Override OpenAI Base URL Breaks Anthropic Key: Fix
One Cursor settings toggle causes three different Anthropic API key errors. Here is the exact fix and why it can silently undo itself.
How to fix the Cursor Provider Error that lasts for days
Most persistent Cursor Provider Errors aren't a network problem — they're caused by a conflicting MCP server. Here's the fix sequence that actually works.
UiPath vs Power Automate for small business: cost, features, and when to pick each
Power Automate starts at $15/user/month — or $0 on M365. UiPath unattended bots cost $420+/month. Here's when each one makes sense for a small business.