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.
The 5 Places I Always Check First When Claude Keeps Showing 'Failed to Upload File'
Claude's 'Failed to upload file' error has different fixes depending on the underlying cause. Based on hours of debugging this in real workflows, here is the diagnostic order I follow that resolves it 99% of the time.
Claude Projects Not Working: A Practical Troubleshooting Guide
Files vanishing, knowledge ignored, search returning nothing — a hands-on guide to diagnosing and fixing the most common Claude Projects failures.
Does Claude Have an Inner Life? What Anthropic's Model Welfare Research Reveals
Anthropic's 'Model Welfare' research explained — does Claude have something like consciousness or emotions? Explore the official stance, research frontiers, and what developers should understand about Claude's design philosophy.
When Claude Code Hits `index.lock` in VMs and CI: Three Workarounds That Actually Stick
When Claude Code freezes on `fatal: Unable to create '.git/index.lock'` inside a VM, container, or CI sandbox, here are three battle-tested workarounds — pick the one that matches the layer of failure you're actually hitting.
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.
Editing Multiple Repositories at Once With Claude Code --add-dir
How to use Claude Code's --add-dir flag to edit multiple repositories in a single session. Practical patterns for cross-repo API changes, shared utility refactoring, and keeping docs in sync with code.
Running Claude Code Without Breakage — A Failure-First Production Workflow with Plan Mode, Hooks, Rewind, and Subagents
If Claude Code has ever landed a broken commit on your main branch, this guide shows how to combine Plan Mode, Hooks, Rewind, and Subagents into a single failure-first workflow that keeps your repository safe without slowing you down.
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.
Weekly Picks: Top 5 Must-Read Articles on Claude Lab (Apr 18–24)
The five most-read Claude Lab articles from April 18 to 24, 2026. This week's ranking covers Claude Design in practice, Skills troubleshooting, Parallel Tool Use in production, and the Claude Design → Claude Code handoff — the real workflow threads our readers spent the most time on.