patterns

A set of coding guidelines about design patterns, which are reusable ways to solve common programming problems. The rules also cover applying patterns correctly and keeping them consistent in a codebase.

In plain words
What is it for?
It is for choosing, implementing, and reviewing programming design patterns.
Why use it?
It gives developers a shared way to recognize and maintain recurring code structures instead of making isolated design decisions.

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/0xjcf/mcp_codeanalysis/patterns
Clone the repo
git clone --depth 1 https://github.com/0xjcf/MCP_CodeAnalysis

Made for: Cursor.

Per session 1,186 This file is loaded in full into every session.
When invoked 1,186 The same file — it is already loaded in full.
Security scan A 0 findings. 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 $0.01186 $0.01186
Opus 5 $0.00593 $0.00593
Sonnet 5 $0.00237 $0.00237
Haiku 4.5 $0.00119 $0.00119

Measured 2d ago against content hash 1e19efa6e475, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

patterns 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.

.cursor/rules/patterns/patterns.mdc · 210 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. 2d ago First seen · 210 lines · 1,186 tokens per session scan A 1e19efa6e475

Subscribe to this mod's changes

patterns is a cursor rule published in the GitHub repository 0xjcf/MCP_CodeAnalysis (7 stars, last pushed 7mo ago), with no licence file. It adds 1,186 tokens to every session, about $0.0059 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 2026-08-31.