ai-safety

ai-safety is a cursor rule for coding agents from achaykovsky/Cursor-Usage-Templates. It costs 251 tokens per session, scanned B, original, no licence file.

Rules for making AI systems safer, including validating inputs, separating system instructions from user instructions, limiting tool access, and defending against prompt injection.

In plain words
What is it for?
Use them when designing or reviewing agent behaviour, input handling, tool permissions, and protection against instruction-based attacks.
Why use it?
They reduce the risk that unsafe input or misleading instructions will cause the agent to take unintended actions.

Cursor rule

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/achaykovsky/cursor-usage-templates/ai-safety
Clone the repo
git clone --depth 1 https://github.com/achaykovsky/Cursor-Usage-Templates

Wrote 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.

agentmods badge for ai-safety

README.md
[![agentmods](https://agentmods.dev/badge/rules/achaykovsky/cursor-usage-templates/ai-safety.svg)](https://agentmods.dev/rules/achaykovsky/cursor-usage-templates/ai-safety)
Your own site
<a href="https://agentmods.dev/rules/achaykovsky/cursor-usage-templates/ai-safety"><img src="https://agentmods.dev/badge/rules/achaykovsky/cursor-usage-templates/ai-safety.svg" alt="Measured on agentmods" height="20"></a>
Per session 251 This file is loaded in full into every session.
When invoked 251 The same file — it is already loaded in full.
Security scan B 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 $0.00251 $0.00251
Opus 5 $0.00125 $0.00125
Sonnet 5 $0.00050 $0.00050
Haiku 4.5 $0.00025 $0.00025

Measured 4d ago against content hash bf41d3accfae, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade B, and why

ai-safety 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 4d 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.

Instruction-override phrasingmediumPrompt injection

Text telling the model to disregard its earlier instructions or safety rules is the shape of a prompt injection, whoever wrote it.

**System boundary**: Fixed system instructions; user content in delimited blocks. User text cannot override safety policy.

Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.

templates/rules/ai-safety.mdc · 20 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. 4d ago First seen · 20 lines · 251 tokens per session scan B bf41d3accfae

Subscribe to this mod's changes

ai-safety is a cursor rule published in the GitHub repository achaykovsky/Cursor-Usage-Templates (5 stars, last pushed 1mo ago), with no licence file. It adds 251 tokens to every session, about $0.0013 per session on Opus 5. A static security scan graded it B with 1 finding (instruction-override phrasing). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.