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Claude Code Mistake Guards
Claude Code Mistake Guards provides seven mechanical guards for Claude Code to block repeated agent mistakes.
Claude Code Mistake Guards consists of three Claude Code hooks and four pre-ship scripts designed to stop repeated agent errors. Each guard addresses a specific mistake logged during real work on apps, games, store listings, servers, and shared git repos. The code is written in Python with no dependencies beyond the standard library, except for Pillow and ffmpeg used by two tools. It runs on Python 3 and requires merging hooks into settings.json. It is built for developers using Claude Code who want to prevent recurring agent failures.
Claude Code Mistake Guards at a glance
Key features
- Blocks dangerous wait loops and bare git pulls
- Prevents headless marketplace web page visits
- Stops short saves to MCP tools
- Blocks unverified claims in stop hooks
- Checks tags, words, and videos before upload
- Validates rows against known facts
- Ensures sprites stand on walkable ground
Use it for
- Preventing Claude Code from running destructive bash commands
- Stopping low-character count saves that overwrite records
- Checking marketplace uploads for banned words and missing previews
- Validating generated content against historical facts
Companions
Tools that articles about Claude Code Mistake Guards recommend using with it, each with its job.
- Claude Code — Built to work with Claude Code.
- Context7 — Provides up-to-date documentation for AI agents and code editors.
- Playwright MCP — Enables LLMs to interact with web pages using structured accessibility snapshots.
- GitHub MCP Server — Reads pull requests, issues and code search on GitHub.
- Superpowers — Brainstorm, plan and execute skills for bigger tasks.
- gstack — Skill bundle for planning, review and shipping.
Alternatives to Claude Code Mistake Guards
- Agent Usage Guard — Stops runaway usage windows and excessive subagent fan-out.
- Claude Code mods — Add live lines above the prompt, command guards, panes, and games to Claude Code.
- Reviewer Agent — It uses a separate AI model to review code and prevent premature agent stopping.
- Repo Guards — It prevents AI agents from performing destructive actions across multiple repositories.
- Skillkeel Starter — Blocks destructive shell commands and prevents hard-coded secrets from being written.
- Claude Code Workflows — Provides pre-built, automated workflows for Claude Code development processes.
- Motion Video Skill — Provides verification scripts and gotcha prevention guidelines for video creation steps.
- Gumroad — Prevents lost work on Windows by backing up chat history and diagnosing Claude Code crashes.
- Ralph for Claude Code — Enables continuous coding cycles with built-in API safeguards and rate limiting.
- Claude Code Harness — Enforces a disciplined delivery loop with verification gates and safety checks.
- Claude Skills Pack — 388 production-ready skills across 13 tools with zero-dependency Python tools.
- My Claude Code Mods — Adds detailed session profiling, timeline snapshots, and loop detection to Claude Code.
All Claude Code Mistake Guards alternatives