test-rule

A Cursor rule that applies to JavaScript and TypeScript files under selected source folders and sets general coding, testing, documentation, and error-handling practices.

In plain words
What is it for?
Use it when adding or changing matching source files, especially when writing TypeScript, tests, public API documentation, small functions, and dependency-injected code.
Why use it?
It gives edits in those files a consistent baseline instead of leaving code style and quality decisions unspecified.

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/blencorp/rules-gen/test-rule
Clone the repo
git clone --depth 1 https://github.com/blencorp/rules-gen

Made for: Cursor.

Per session 97 This file is loaded in full into every session.
When invoked 97 The same file — it is already loaded in full.
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 $0.00097 $0.00097
Opus 5 $0.00048 $0.00048
Sonnet 5 $0.00019 $0.00019
Haiku 4.5 $0.00010 $0.00010

Measured 2d ago against content hash a0b7fcd2ed3e, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

test-rule 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.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

  • untitled — 100% identical, 0 lines differ
.cursor/rules/test-rule.mdc · 19 lines

What it actually says

Test Rule

description: "A test rule for development"

patterns:

  • "src/**/*.js"
  • "lib/**/*.ts"

Rules

  • Use TypeScript for all new code
  • Follow the project's coding standards
  • Write comprehensive tests
  • Document all public APIs
  • Use early returns when possible
  • Keep functions small and focused
  • Use proper error handling
  • Follow best practices for performance
  • Maintain consistent code style
  • Use dependency injection
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 · 19 lines · 97 tokens per session scan A a0b7fcd2ed3e

Subscribe to this mod's changes

test-rule is a cursor rule published in the GitHub repository blencorp/rules-gen (16 stars, last pushed 11mo ago), licensed MIT. It adds 97 tokens to every session, about $0.0005 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.