Obliteratus
RedWoodOG/Hermes-Desktop
Remove refusal behaviors from open-weight LLMs using OBLITERATUS — mechanistic interpretability techniques (diff-in-means, SVD, whitened SVD, LEACE, SAE decomposition, etc.) to excise guardrails…
Always-on operational guardrails, model-independent. An agent skill from mrtooher/fable-mode.
Install Execution Guardrails
$ npx skills add mrtooher/fable-mode --skill execution-guardrails -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install mrtooher/fable-mode execution-guardrails --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/mrtooher/fable-mode.git skills-src && mkdir -p .claude/skills && cp -r skills-src/execution-guardrails .claude/skills/execution-guardrails && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "execution-guardrails" agent skill from https://github.com/mrtooher/fable-mode/tree/main/execution-guardrails into .claude/skills/execution-guardrails/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "execution-guardrails", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/mrtooher/fable-mode/tree/main/execution-guardrailsType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add mrtooher/fable-mode --skill execution-guardrails -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install mrtooher/fable-mode execution-guardrails --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/mrtooher/fable-mode.git skills-src && mkdir -p .agents/skills && cp -r skills-src/execution-guardrails .agents/skills/execution-guardrails && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "execution-guardrails" agent skill from https://github.com/mrtooher/fable-mode/tree/main/execution-guardrails into .agents/skills/execution-guardrails/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "execution-guardrails", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add mrtooher/fable-mode --skill execution-guardrails -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install mrtooher/fable-mode execution-guardrails --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/mrtooher/fable-mode.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/execution-guardrails .cursor/skills/execution-guardrails && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "execution-guardrails" agent skill from https://github.com/mrtooher/fable-mode/tree/main/execution-guardrails into .cursor/skills/execution-guardrails/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "execution-guardrails", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/mrtooher/fable-mode.git --path execution-guardrails--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add mrtooher/fable-mode --skill execution-guardrails -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install mrtooher/fable-mode execution-guardrails --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/mrtooher/fable-mode.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/execution-guardrails .gemini/skills/execution-guardrails && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "execution-guardrails" agent skill from https://github.com/mrtooher/fable-mode/tree/main/execution-guardrails into .gemini/skills/execution-guardrails/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "execution-guardrails", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install mrtooher/fable-mode execution-guardrailsInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add mrtooher/fable-mode --skill execution-guardrails -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/mrtooher/fable-mode.git skills-src && mkdir -p .github/skills && cp -r skills-src/execution-guardrails .github/skills/execution-guardrails && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "execution-guardrails" agent skill from https://github.com/mrtooher/fable-mode/tree/main/execution-guardrails into .github/skills/execution-guardrails/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "execution-guardrails", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add mrtooher/fable-mode --skill execution-guardrails -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install mrtooher/fable-mode execution-guardrails --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/mrtooher/fable-mode.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/execution-guardrails .opencode/skills/execution-guardrails && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "execution-guardrails" agent skill from https://github.com/mrtooher/fable-mode/tree/main/execution-guardrails into .opencode/skills/execution-guardrails/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "execution-guardrails", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
execution-guardrails- GitHub stars
- 870
- Token cost
- ~1k tokens
- SKILL.md length
- 501 words
- Files
- 1
- Skills in repo
- 7
- Repo updated
- First seen
- Licence
- None found
At a glance
Always-on operational guardrails, model-independent. An agent skill from mrtooher/fable-mode.
- Works in 3 steps: Verify before flag → Warning threshold → Find-and-replace safety
- Ever a response would flag a problem
- SKILL.md covers 1. Verify before flag, 2. Warning threshold, 3. Find-and-replace safety and Relationship to fable-mode
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Execution Guardrails is an agent skill from mrtooher/fable-mode. Always-on operational guardrails, model-independent. Apply on EVERY task and EVERY model (Fable, 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…
Its SKILL.md is about 1k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It sits in AI & LLM Engineering, covering LLM guardrails. The repository describes itself as: A Claude skill that activates Fable-style agentic behavior: explicit multi-stage planning, sub-agent delegation, and self-verification.
When your agent uses it
- Ever a response would flag a problem
- Raise a warning
- Edit files with search-and-replace
Example prompts
- “/execution-guardrails”
Workflow steps
3 steps, taken from the step headings in SKILL.md.
- Verify before flag
- Warning threshold
- Find-and-replace safety
What it can do on your machine
Read from SKILL.md and the folder at commit a368f94. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md.
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Execution Guardrails loads about 1k tokens when it runs. Until then it costs about 197 tokens; SKILL.md has 501 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
Without a licence we can't republish the file, so here is its outline and opening line. It has 501 words (~1,008 tokens).
“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…”
- name
- execution-guardrails
Files
Just SKILL.md in execution-guardrails of mrtooher/fable-mode.
Open the folder on GitHubat commit a368f94
Compare with similar skills
Execution Guardrails next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Execution Guardrails this skillmrtooher/fable-mode | 870 | — | ~1k | Automated safety check: Pass | None | |
| ObliteratusRedWoodOG/Hermes-Desktop | 177 | 6 repos | ~3.8k | Automated safety check: Pass | MIT | |
| Aisafetyhotwuyoscar/AISafetyHot-Hub | 175 | — | ~1.2k | Automated safety check: Pass | Custom licence | |
| Lemonade Router Builderamd/skills | 395 | — | ~4k | Automated safety check: Pass | MIT | |
| Persona Designkangarooking/system-prompt-skills | 205 | 1 repos | ~956 | Automated safety check: Pass | MIT | |
| Writing Eval Scenariosopen-bias/open-bias | 143 | — | ~1.5k | Automated safety check: Pass | Apache-2.0 |
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Persona Design
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Writing Eval Scenarios
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Guide for writing eval conversation JSONs and running them through policy engines
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Related
Categories
Questions about Execution Guardrails
What does Execution Guardrails do?
Always-on operational guardrails, model-independent. An agent skill from mrtooher/fable-mode. Execution Guardrails is an agent skill from mrtooher/fable-mode. Always-on operational guardrails, model-independent.
When should I use Execution Guardrails?
Execution Guardrails fits situations like: ever a response would flag a problem; raise a warning; edit files with search-and-replace.
How do I install Execution Guardrails in Claude Code?
Run `npx skills add mrtooher/fable-mode --skill execution-guardrails -a claude-code`. Or copy the skill folder (execution-guardrails in mrtooher/fable-mode) into .claude/skills/execution-guardrails in your project. Claude Code loads it when a task matches its description.
How do I install Execution Guardrails in Codex?
Run `npx skills add mrtooher/fable-mode --skill execution-guardrails -a codex`. Or copy the skill folder (execution-guardrails in mrtooher/fable-mode) into .agents/skills/execution-guardrails in your project. Codex loads it when a task matches its description.
Can I use Execution Guardrails in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add mrtooher/fable-mode --skill execution-guardrails -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/execution-guardrails, .gemini/skills/execution-guardrails, .github/skills/execution-guardrails and .opencode/skills/execution-guardrails in your project.
What does Execution Guardrails need to run?
SKILL.md names no scripts, command-line tools or credentials: Execution Guardrails is instructions for the agent only.
Does Execution Guardrails access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Execution Guardrails safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Execution Guardrails use?
No licence was found for Execution Guardrails or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.
How many tokens does Execution Guardrails use?
About 1k tokens (SKILL.md is roughly 4k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Execution Guardrails?
Skills that share tags, products or a category with Execution Guardrails: Obliteratus (RedWoodOG/Hermes-Desktop, 177 stars), Aisafetyhot (wuyoscar/AISafetyHot-Hub, 175 stars), Lemonade Router Builder (amd/skills, 395 stars) and Persona Design (kangarooking/system-prompt-skills, 205 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Execution Guardrails?
mrtooher (a GitHub user) maintains it in mrtooher/fable-mode, which has 870 GitHub stars. The repository holds 7 skills in this directory. The repository was last updated on September 2, 2026.
Source: mrtooher/fable-mode on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.