Claude API stop_sequences Not Working — 5 Things to Check Before You Give Up
Diagnose why your Claude API stop_sequences parameter isn't halting generation as expected. Practical breakdown of token boundaries, whitespace mismatches, Tool Use interactions, and streaming pitfalls — with copy-paste code examples.
Why Cowork Scheduled Tasks Stop Mid-Run and How to Recover
Diagnose Cowork scheduled task failures using measured exit codes and real error output — why safe.directory delays failure instead of fixing it, how to pick a writable root before cloning, and how to structure logs with reason codes.
7 Common Errors When Getting Started with Claude API in Python (With Fixes)
A practical troubleshooting guide covering the 7 most common errors Python developers hit when starting with the Claude API SDK — from AuthenticationError and RateLimitError to response parsing mistakes and streaming pitfalls.
How to Fix the "Tool Result Could Not Be Submitted" Error in Claude
A practical guide to diagnosing and fixing the "tool result could not be submitted" error in Claude's tool use API, based on real development experience.
How to Diagnose and Fix Claude Code Network and Connection Errors in 5 Minutes
A systematic guide to diagnosing network and connection errors in Claude Code. Understand what common error messages mean, and follow a step-by-step flow to pinpoint the root cause within 5 minutes.
Claude Code Stops Mid-Execution: Complete Diagnostic Guide
Diagnose why Claude Code freezes or stops mid-task. Covers context budget exhaustion, unresponsive subagents, infinite loops, and tool timeouts with actionable fixes for each scenario.
Stop the 'old_string is not unique' Error in Claude Code's Edit Tool — A Practical Rewrite Strategy
When Claude Code's Edit tool throws 'old_string is not unique in the file', the root cause is usually that the prompt didn't guarantee a uniquely identifiable target. Here's how to design rewrites that actually stick.
When Your Claude API Retry Logic Made Rate Limits Worse — The Retry-After Header You Forgot to Read
If 429 errors went up after you added retry logic to your Claude API client, the cause is almost always the same: ignoring the Retry-After header and using exponential backoff without jitter. Here is how to diagnose and fix it.
When Claude won't send your message: a diagnostic order that always finds the cause
When the send button does nothing, the spinner runs forever, or your message vanishes — here's the order I work through to find the real cause within five minutes.
Fix Claude API's 'messages.X.role must alternate' in One Minute — Common 400 invalid_request_error Patterns
A pattern-by-pattern guide to fixing the 'messages.X.role must alternate' error in Claude's Messages API — covering user/assistant alternation, tool_use and tool_result pairing, and history-trimming pitfalls with working code.
Why Claude Code Skips .gitignore Files in Search — and How to Pull Them in When You Need Them
When .env.example or dist/ won't show up in Claude Code's Glob and Grep, .gitignore is the reason. Here's why it happens, plus three concrete ways through it: the Read tool, --no-ignore flags, and selective gitignore overrides.
Claude Code Auto-Update Not Working? A Practical Diagnosis Flow When `claude --version` Won't Move
If you ran `npm install -g @anthropic-ai/claude-code` but `claude --version` still reports last week's number, this guide walks you through the three most common root causes — PATH conflicts, stale binaries, and shell-managed Node — with concrete fixes for each.