shell-file-safety

A set of shell rules for handling files safely from the command line. It describes commands that should require confirmation or be blocked, commands that are allowed, and safer alternatives.

In plain words
What is it for?
Use it when an agent runs shell commands that read, change, move, or remove files.
Why use it?
It reduces the chance that a shell command will accidentally overwrite, delete, or otherwise damage files.

Cursor rule for Cursor

Install

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.

agentmods
npx agentmods add rules/premouseking/mentora/shell-file-safety
Clone the repo
git clone --depth 1 https://github.com/premouseking/Mentora

Made for: Cursor.

Per session 771 This file is loaded in full into every session.
When invoked 771 The same file — it is already loaded in full.
Security scan A 1 finding. Scan, not verified.
Origin unknown No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5 $0.00771 $0.00771
Opus 5 $0.00385 $0.00385
Sonnet 5 $0.00154 $0.00154
Haiku 4.5 $0.00077 $0.00077

Measured yesterday against content hash 6e1c15c4f3e2, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

shell-file-safety scanned grade A 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 yesterday.

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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

- **解包 / 下载到本地**:`tar`、`unzip`、`7z`、`curl -o/-O`、`wget -O`
.cursor/rules/shell-file-safety.mdc · 46 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

Changes

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.

  1. yesterday First seen · 46 lines · 771 tokens per session scan A 6e1c15c4f3e2

Subscribe to this mod's changes

shell-file-safety is a cursor rule published in the GitHub repository premouseking/Mentora (2 stars, last pushed 1mo ago), with no licence file. It adds 771 tokens to every session, about $0.0039 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.