Guard Mode
garrytan/gstack
Switches on full safety by combining warnings before destructive commands with a block on edits outside one directory you choose, for work on production or live systems.
本番システムでの作業時や、エージェントを自律的に実行する際に破壊的な操作を防ぐためにこのスキルを使用してください. An agent skill from affaan-m/ECC.
MITAuto-check: notes
Install Safety Guard
$ npx skills add affaan-m/ECC --skill safety-guard -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install affaan-m/ECC safety-guard --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/affaan-m/ECC.git skills-src && mkdir -p .claude/skills && cp -r skills-src/docs/ja-JP/skills/safety-guard .claude/skills/safety-guard && 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 "safety-guard" agent skill from https://github.com/affaan-m/ECC/tree/main/docs/ja-JP/skills/safety-guard into .claude/skills/safety-guard/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "safety-guard", 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/affaan-m/ECC/tree/main/docs/ja-JP/skills/safety-guardType 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 affaan-m/ECC --skill safety-guard -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install affaan-m/ECC safety-guard --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/affaan-m/ECC.git skills-src && mkdir -p .agents/skills && cp -r skills-src/docs/ja-JP/skills/safety-guard .agents/skills/safety-guard && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "safety-guard" agent skill from https://github.com/affaan-m/ECC/tree/main/docs/ja-JP/skills/safety-guard into .agents/skills/safety-guard/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "safety-guard", 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 affaan-m/ECC --skill safety-guard -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install affaan-m/ECC safety-guard --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/affaan-m/ECC.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/docs/ja-JP/skills/safety-guard .cursor/skills/safety-guard && 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 "safety-guard" agent skill from https://github.com/affaan-m/ECC/tree/main/docs/ja-JP/skills/safety-guard into .cursor/skills/safety-guard/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "safety-guard", 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/affaan-m/ECC.git --path docs/ja-JP/skills/safety-guard--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 affaan-m/ECC --skill safety-guard -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install affaan-m/ECC safety-guard --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/affaan-m/ECC.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/docs/ja-JP/skills/safety-guard .gemini/skills/safety-guard && 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 "safety-guard" agent skill from https://github.com/affaan-m/ECC/tree/main/docs/ja-JP/skills/safety-guard into .gemini/skills/safety-guard/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "safety-guard", 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 affaan-m/ECC safety-guardInstalls 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 affaan-m/ECC --skill safety-guard -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/affaan-m/ECC.git skills-src && mkdir -p .github/skills && cp -r skills-src/docs/ja-JP/skills/safety-guard .github/skills/safety-guard && 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 "safety-guard" agent skill from https://github.com/affaan-m/ECC/tree/main/docs/ja-JP/skills/safety-guard into .github/skills/safety-guard/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "safety-guard", 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 affaan-m/ECC --skill safety-guard -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install affaan-m/ECC safety-guard --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/affaan-m/ECC.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/docs/ja-JP/skills/safety-guard .opencode/skills/safety-guard && 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 "safety-guard" agent skill from https://github.com/affaan-m/ECC/tree/main/docs/ja-JP/skills/safety-guard into .opencode/skills/safety-guard/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "safety-guard", 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
safety-guard- GitHub stars
- 276k
- Token cost
- ~323 tokens
- SKILL.md length
- 49 words
- Files
- 1
- Skills in repo
- 683
- Repo updated
- First seen
- Licence
- MIT
At a glance
本番システムでの作業時や、エージェントを自律的に実行する際に破壊的な操作を防ぐためにこのスキルを使用してください. An agent skill from affaan-m/ECC.
- SKILL.md covers 使用するタイミング, 動作の仕組み, 実装 and 統合
- Calls codex
What it does
Safety Guard is an agent skill from affaan-m/ECC. 本番システムでの作業時や、エージェントを自律的に実行する際に破壊的な操作を防ぐためにこのスキルを使用してください。
Its SKILL.md is about 320 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
The repository describes itself as: The agent harness performance optimization system. Skills, instincts, memory, security, and research-first development for Claude Code, Codex, Opencode, Cursor and beyond. The licence is MIT.
Example prompts
- “/safety-guard”
Requirements
- Docker
What it can do on your machine
Read from SKILL.md and the folder at commit 4eb71d9. 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
Shell commands in SKILL.md call:
codex
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
Safety Guard loads about 323 tokens when it runs. Until then it costs about 18 tokens; SKILL.md has 49 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: notes
The automated check noted patterns worth knowing about, such as sudo or a known installer.
- NoteRuns commands with sudoSKILL.md:34
- sudo rm
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
The full file from affaan-m/ECC at commit 4eb71d9, republished under its MIT licence (© affaan-m). 49 words, ~323 tokens.
Download SKILL.mdSave it as
.claude/skills/safety-guard/SKILL.md (or your agent's skills folder).- name
- safety-guard
- description
- 本番システムでの作業時や、エージェントを自律的に実行する際に破壊的な操作を防ぐためにこのスキルを使用してください。
- origin
- ECC
Safety Guard — 破壊的な操作の防止
使用するタイミング
- 本番システムでの作業時
- エージェントが自律的に動作している場合（フルオートモード）
- 特定のディレクトリへの編集を制限したい場合
- センシティブな操作時（マイグレーション、デプロイ、データ変更）
動作の仕組み
3つの保護モードがあります:
モード1: Careful モード
実行前に破壊的なコマンドを検知して警告します:
監視するパターン:
- rm -rf（特に /、~、またはプロジェクトルート）
- git push --force
- git reset --hard
- git checkout .（全変更を破棄）
- DROP TABLE / DROP DATABASE
- docker system prune
- kubectl delete
- chmod 777
- sudo rm
- npm publish（誤公開）
- --no-verify を含む全コマンド検知した場合: コマンドの内容を示し、確認を求め、より安全な代替手段を提示します。
モード2: Freeze モード
特定のディレクトリツリーへのファイル編集をロックします:
/safety-guard freeze src/components/src/components/ 外への Write/Edit は説明付きでブロックされます。エージェントを特定の領域に集中させ、無関係なコードに触れないようにしたい場合に便利です。
モード3: Guard モード（Careful + Freeze の組み合わせ）
両方の保護が有効になります。自律エージェントのための最大安全モードです。
/safety-guard guard --dir src/api/ --allow-read-allエージェントはすべてを読み取れますが、src/api/ にのみ書き込めます。破壊的なコマンドはどこでもブロックされます。
ロック解除
/safety-guard off実装
PreToolUse フックを使用して Bash、Write、Edit、MultiEdit ツールの呼び出しを検知します。実行前に、アクティブなルールに対してコマンド/パスを確認します。
統合
codex -a neverセッションでデフォルトで有効化する- ECC 2.0 の可観測性リスクスコアリングと組み合わせる
- ブロックされた全アクションを
~/.claude/safety-guard.logに記録する
© affaan-m, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
Just SKILL.md in docs/ja-JP/skills/safety-guard of affaan-m/ECC.
Open the folder on GitHubat commit 4eb71d9
Compare with similar skills
Safety Guard 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 |
|---|---|---|---|---|---|---|
| Safety Guard this skillaffaan-m/ECC | 276k | — | ~323 | Automated safety check: Notes | MIT | |
| Guard Modegarrytan/gstack | 136k | — | ~1k | Automated safety check: Notes | MIT | |
| Python Type Safetywshobson/agents | 40k | — | ~1.4k | Automated safety check: Pass | MIT | |
| Runaway Guardsickn33/agentic-awesome-skills | 47k | 1 repos | ~5.7k | Automated safety check: Notes | Apache-2.0 | |
| JSON Safetythedaviddias/Front-End-Checklist | 74k | — | ~512 | Automated safety check: Pass | MIT | |
| Safety Scanruvnet/ruflo | 74k | — | ~409 | Automated safety check: Notes | MIT |
Similar skills
Python Type Safety
wshobson/agents
Python type safety with type hints, generics, protocols, and strict type checking.
Runaway Guard
sickn33/agentic-awesome-skills
Cost-safety discipline for paid AI / inference APIs: treat $-cost as a third complexity dimension alongside time and space.
JSON Safety
thedaviddias/Front-End-Checklist
A skill your agent uses when reviewing scripts, client components, bundles, or runtime behavior related to Parse JSON safely with error handling.
Safety Scan
ruvnet/ruflo
Scan inputs for prompt injection, unsafe content, and adversarial attacks using AIDefence.
Safety Stock Review
davila7/claude-code-templates
Size or audit safety stock with assumption checks - the zsigmasqrt(LT) formula plus an empirical stress test of what it actually delivers (cycle service vs fill rate) per variability class.
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Questions about Safety Guard
What does Safety Guard do?
本番システムでの作業時や、エージェントを自律的に実行する際に破壊的な操作を防ぐためにこのスキルを使用してください. An agent skill from affaan-m/ECC. Safety Guard is an agent skill from affaan-m/ECC.
How do I install Safety Guard in Claude Code?
Run `npx skills add affaan-m/ECC --skill safety-guard -a claude-code`. Or copy the skill folder (docs/ja-JP/skills/safety-guard in affaan-m/ECC) into .claude/skills/safety-guard in your project. Claude Code loads it when a task matches its description.
How do I install Safety Guard in Codex?
Run `npx skills add affaan-m/ECC --skill safety-guard -a codex`. Or copy the skill folder (docs/ja-JP/skills/safety-guard in affaan-m/ECC) into .agents/skills/safety-guard in your project. Codex loads it when a task matches its description.
Can I use Safety Guard 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 affaan-m/ECC --skill safety-guard -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/safety-guard, .gemini/skills/safety-guard, .github/skills/safety-guard and .opencode/skills/safety-guard in your project.
What does Safety Guard need to run?
Going by SKILL.md and its folder, Safety Guard needs the command-line tools its instructions call (codex). Our summary lists: Docker.
Does Safety Guard 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 Safety Guard safe to install?
Our automated static check of SKILL.md found notes only (runs commands with sudo), nothing it rates as a warning. It is not a guarantee. Review the folder before installing.
What licence does Safety Guard use?
Safety Guard is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Safety Guard use?
About 323 tokens (SKILL.md is roughly 1.3k 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 Safety Guard?
Skills that share tags, products or a category with Safety Guard: Guard Mode (garrytan/gstack, 136k stars), Python Type Safety (wshobson/agents, 40k stars), Runaway Guard (sickn33/agentic-awesome-skills, 47k stars) and JSON Safety (thedaviddias/Front-End-Checklist, 74k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Safety Guard?
affaan-m (a GitHub user) maintains it in affaan-m/ECC, which has 276,111 GitHub stars. The repository holds 683 skills in this directory. The repository was last updated on October 10, 2026.
Source: affaan-m/ECC on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.