Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add skills/refo/claude-dev-helpers/git-guardrails-claude-codenpx skills add refo/claude-dev-helpers --skill git-guardrails-claude-codegit clone --depth 1 https://github.com/refo/claude-dev-helpersWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/refo/claude-dev-helpers/git-guardrails-claude-code)<a href="https://agentmods.dev/skills/refo/claude-dev-helpers/git-guardrails-claude-code"><img src="https://agentmods.dev/badge/skills/refo/claude-dev-helpers/git-guardrails-claude-code.svg" alt="Measured on agentmods" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00062 | $0.00588 |
| Opus 5 | $0.00031 | $0.00294 |
| Sonnet 5 | $0.00012 | $0.00118 |
| Haiku 4.5 | $0.00006 | $0.00059 |
Grade B, and why
git-guardrails-claude-code scanned grade B with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 3d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Reads agent configuration directoriesmediumAgent snooping
.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.
Ask the user: install for **this project only** (`.claude/settings.json`) or **all projects** (`~/.claude/settings.json`)? This is a copy
92% identical to git-guardrails-claude-code — 2 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 96 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Setup Git Guardrails
Sets up a PreToolUse hook that intercepts and blocks dangerous git commands before Claude executes them.
What Gets Blocked
git push(all variants including--force)git reset --hardgit clean -f/git clean -fdgit branch -Dgit checkout ./git restore .
When blocked, Claude sees a message telling it that it does not have authority to access these commands.
Steps
1. Ask scope
Ask the user: install for this project only (.claude/settings.json) or all projects (~/.claude/settings.json)?
2. Copy the hook script
The bundled script is at: scripts/block-dangerous-git.sh
Copy it to the target location based on scope:
- Project:
.claude/hooks/block-dangerous-git.sh - Global:
~/.claude/hooks/block-dangerous-git.sh
Make it executable with chmod +x.
3. Add hook to settings
Add to the appropriate settings file:
Project (.claude/settings.json):
{
"hooks": {
"PreToolUse": [
{
"matcher": "Bash",
"hooks": [
{
"type": "command",
"command": "\"$CLAUDE_PROJECT_DIR\"/.claude/hooks/block-dangerous-git.sh"
}
]
}
]
}
}
Global (~/.claude/settings.json):
{
"hooks": {
"PreToolUse": [
{
"matcher": "Bash",
"hooks": [
{
"type": "command",
"command": "~/.claude/hooks/block-dangerous-git.sh"
}
]
}
]
}
}
If the settings file already exists, merge the hook into existing hooks.PreToolUse array — don't overwrite other settings.
4. Ask about customization
Ask if user wants to add or remove any patterns from the blocked list. Edit the copied script accordingly.
5. Verify
Run a quick test:
echo '{"tool_input":{"command":"git push origin main"}}' | <path-to-script>
Should exit with code 2 and print a BLOCKED message to stderr.
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 3d ago First seen · 96 lines · 62 tokens per session scan B 03c4de7613c7
git-guardrails-claude-code is a skill published in the GitHub repository refo/claude-dev-helpers (2 stars, last pushed 2mo ago), licensed MIT. It adds 62 tokens to every session and 588 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it B with 1 finding (reads agent configuration directories). It is 92% identical to git-guardrails-claude-code, differing in 2 lines, and is treated as a copy.
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