security

Security rules for the Cursor coding assistant. They tell the assistant to apply security best practices during code reviews.

In plain words
What is it for?
Reviewing code with security considerations in mind when using Cursor.
Why use it?
They help reviewers look for security problems instead of checking only whether the code works.

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/bluebear-io/angry-bear/security
Clone the repo
git clone --depth 1 https://github.com/bluebear-io/angry-bear
Per session 5 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 26 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original 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 $0.00005 $0.00026
Opus 5 $0.00003 $0.00013
Sonnet 5 $0.00001 $0.00005
Haiku 4.5 $0.00001 $0.00003

Measured 2d ago against content hash ae9015c962d1, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

security scanned grade A with 0 findings 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 2d 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.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

test/testdata/skills/cursor/security.mdc · 9 lines

What it actually says

Security Rules

Apply security best practices when reviewing code.

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. 2d ago First seen · 9 lines · 5 tokens per session scan A ae9015c962d1

Subscribe to this mod's changes

security is a cursor rule published in the GitHub repository bluebear-io/angry-bear (17 stars, last pushed 1mo ago), licensed MIT. It adds 5 tokens to every session and 26 once invoked, about $0.0000 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.