Execution Guardrails

Q: What is a Claude Code skill and how does the Execution Guardrails skill fit in?

A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Execution Guardrails is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the General category. Learn more at https://claudskills.com/learn/what-is-skill-md/.

Category: General · Sub-category: research-misc · Last updated: 2026-07-11

Always-on operational guardrails, model-independent. Apply on EVERY task and EVERY model (Opus, Sonnet, Haiku, and any future tier) whether or not fable-mode's staged loop is running. Three rules: (1) verify-before-flag — never raise a warning about a problem that hasn't been confirmed present by a direct check; (2) warning batching — accumulate minor concerns and surface them together at a threshold instead of interrupting piecemeal; (3) find-and-replace safety — word-boundary anchoring on sed/substring edits plus a corruption grep afterward. Trigger whenever a response would flag a problem, raise a warning, or edit files with search-and-replace. These are behavioral contracts with the user, not capability aids — they do not depend on model strength.

Security AStatic scan found no risk patternsHow grading works ›

From the source SKILL.md

Three rules extracted from fable-mode's operational section so they apply everywhere, not only inside the staged loop. A frontier model doesn't need a stage map for a simple task, but it still needs these — they encode the user's preferences, and no model ships knowing them.

What this skill does

Execution Guardrails is a community-contributed Claude Code skill in the research-misc sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/execution-guardrails/ and loads when your prompt matches the skill's trigger.

Who uses this skill

The Execution Guardrails Claude Code skill is built for Claude Code users and developers across all disciplines looking for general-purpose AI assistance. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 196,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/execution-guardrails
curl -L https://claudskills.com/skills/execution-guardrails/SKILL.md \
  -o ~/.claude/skills/execution-guardrails/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/execution-guardrails/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/execution-guardrails/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\execution-guardrails\SKILL.md on Windows. See the full install guide for step-by-step instructions.

📱 Install from your phone or desktop Telegram

Open @claudskills_bot on Telegram, tap Open Desktop App, and the desktop app installs this skill for you. Or share the bot link with a colleague — they get the same one-tap install. Learn more →

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

Pro

For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.

See pricing → Download desktop app

Frequently asked questions

How do I install the Execution Guardrails Claude Code skill?

Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/execution-guardrails/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.

What does the Execution Guardrails skill do?

Is this skill free to install?

Yes. ClaudSkills is an open registry — every skill keeps its source repository's license, and manual install via copy is free. ClaudSkills Pro ($9/mo, $79/yr, or $149 one-time) adds one-click install via the desktop app and a multi-signal Quality Score.

When should I use the Execution Guardrails skill?

Use Execution Guardrails when your Claude Code task falls under the General category — specifically in the research misc area. Claude Code auto-discovers installed skills and invokes the right one based on the task description, so you can also ask Claude directly (e.g. "use Execution Guardrails" or describe the task and let Claude pick). Browse related skills at /category/general/.

What is a Claude Code skill and how does the Execution Guardrails skill fit in?

A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Execution Guardrails is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the General category. Learn more at /learn/what-is-a-claude-skill/.

Attribution & license

Source: https://github.com/mrtooher/fable-mode/blob/HEAD/execution-guardrails/SKILL.md
Author: mrtooher

Cite this skill

If you reference this skill in a blog post, paper, or documentation, you can cite it as:

APA

mrtooher. (2026). Execution Guardrails [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/execution-guardrails/

BibTeX

@misc{execution-guardrails-2026,
  author    = {mrtooher},
  title     = {Execution Guardrails [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/execution-guardrails/}
}

Embed this skill

Promote, attribute, or link this skill from your own README, blog post, or documentation. All three snippets are free to use — no sign-up, no API key. More distribution surfaces →

Badge

[![ClaudSkills](https://claudskills.com/badge/execution-guardrails.svg)](https://claudskills.com/skills/execution-guardrails/?utm_source=badge&utm_medium=readme&utm_campaign=skill_badge)

Security scan

Grade A · scanned 2026-09-28 — free static scan against the OWASP Agentic Skills Top 10.

No risk patterns were found in any of the ten OWASP-aligned categories. How grading works ›

✓ Prompt injection
✓ Data exfiltration
✓ Supply chain
✓ Reverse shell
✓ Credentials
✓ Execution
✓ Filesystem
✓ Persistence
✓ Obfuscation
✓ Network

Show this grade on your repo (click to copy):

[![Security: A](https://img.shields.io/badge/Security-A-2e7d32)](https://claudskills.com/skills/execution-guardrails/#security)

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Part of ClaudSkills — the open registry for Claude Skills & Claude Code Skills. · What's New · Install guide · About · llms.txt

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